对数据库访问基类进行封装
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using System;
using System.Collections;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;
namespace ZXY.Modules.DataAccess
{
/// <summary>
/// 数据访问基础类(基于SQLServer)
/// 张信元
/// 2007-03-30
public class DataProvider
{
#region 变量
private string connectionString = string.Empty;
#endregion
#region 方法
#region 构造函数
/// <summary>
/// 创建数据提供对象
/// </summary>
/// <param name="dbConnectionStrParmName">数据库连接串在config中的参数名称</param>
public DataProvider(string dbConnectionStrParmName)
{
connectionString = ConfigurationSettings.AppSettings[dbConnectionStrParmName];
}
// /// <summary>
// /// 创建数据提供对象
// /// </summary>
// /// <param name="server">服务器名称</param>
// /// <param name="dataBase">数据库名称</param>
// /// <param name="uid">用户名</param>
// /// <param name="pwd">密码</param>
// public DataProvider(string server,string dataBase,string uid,string pwd)
// {
// connectionString = "server="+server+";DataBase="+dataBase+";uid="+uid+";pwd="+pwd+";";
// }
//
#endregion
#region 私有方法
/// <summary>
/// 设定SQL语句
/// </summary>
/// <param name="storedProcName">存储过程名</param>
/// <param name="parmsValue">参数值</param>
/// <returns>sql语句</returns>
private string SetParmsValues(string storedProcName,params object[] parmsValue)
{
string strSql = string.Empty;
for(int i=0;i<parmsValue.Length;i++)
{
strSql = string.Format(storedProcName + " '{0}'", parmsValue[i]);
if(parmsValue.Length>1)
{
if(i!=parmsValue.Length-1)
{
strSql = string.Format(storedProcName + " '{0}',", parmsValue[i]);
}
}
storedProcName = strSql;
}
return strSql;
}
#region TEMP
/*
/// <summary>
/// ArrayList类型转换成数据参数类型
/// </summary>
/// <param name="parmsValue"></param>
/// <returns></returns>
private IDataParameter[] SetSqlParameter(string[] parmsName,ArrayList parmsValue)
{
int count = parmsName.Length;
SqlParameter[] parameters = new SqlParameter[count];
for(int i=0;i<count;i++)
{
parameters[i] = new SqlParameter(parmsName[i],parmsValue[i].GetType());
parameters[i].Value = parmsValue[i];
}
return parameters;
}
*/
#endregion
/// <summary>
/// 数据参数赋值
/// </summary>
/// <param name="parmsName">参数名称</param>
/// <param name="parmsValue">参数值</param>
/// <returns></returns>
private SqlParameter[] SetSqlParameter(string[] parmsName,ArrayList parmsValue)
{
int count = parmsName.Length;
SqlParameter[] parameters = new SqlParameter[count];
for(int i=0;i<count;i++)
{
parameters[i] = new SqlParameter(parmsName[i],parmsValue[i].GetType());
parameters[i].Value = parmsValue[i];
}
return parameters;
}
/// <summary>
///
/// </summary>
/// <param name="cmd"></param>
/// <param name="conn"></param>
/// <param name="trans"></param>
/// <param name="cmdText"></param>
/// <param name="cmdParms"></param>
private void PrepareCommand(SqlCommand cmd,SqlConnection conn,SqlTransaction trans, string cmdText, SqlParameter[] cmdParms)
{
if (conn.State != ConnectionState.Open)
conn.Open();
cmd.Connection = conn;
cmd.CommandText = cmdText;
if (trans != null)
cmd.Transaction = trans;
cmd.CommandType = CommandType.Text;//cmdType;
if (cmdParms != null)
{
foreach (SqlParameter parm in cmdParms)
cmd.Parameters.Add(parm);
}
}
/// <summary>
/// 构建 SqlCommand 对象(用来返回一个结果集,而不是一个整数值)
/// </summary>
/// <param name="connection">数据库连接</param>
/// <param name="storedProcName">存储过程名</param>
/// <param name="parameters">存储过程参数</param>
/// <returns>SqlCommand</returns>
private SqlCommand BuildQueryCommand(SqlConnection connection,string storedProcName, IDataParameter[] parameters)
{
SqlCommand command = new SqlCommand( storedProcName, connection );
command.CommandType = CommandType.StoredProcedure;
foreach (SqlParameter parameter in parameters)
{
command.Parameters.Add( parameter );
}
return command;
}
/// <summary>
/// 创建 SqlCommand 对象实例(用来返回一个整数值)
/// </summary>
/// <param name="storedProcName">存储过程名</param>
/// <param name="parameters">存储过程参数</param>
/// <returns>SqlCommand 对象实例</returns>
private SqlCommand BuildIntCommand(SqlConnection connection,string storedProcName, IDataParameter[] parameters)
{
SqlCommand command = BuildQueryCommand(connection,storedProcName, parameters );
command.Parameters.Add( new SqlParameter ( "ReturnValue",
SqlDbType.Int,4,ParameterDirection.ReturnValue,
false,0,0,string.Empty,DataRowVersion.Default,null ));
return command;
}
#endregion
#region 公用方法
#region GetMaxID
/// <summary>
/// 获取表某个字段的最大值
/// </summary>
/// <param name="FieldName">字段名称</param>
/// <param name="TableName">表名称</param>
/// <returns></returns>
public int GetMaxID(string FieldName,string TableName)
{
string strsql = "select max(" + FieldName + ")+1 from " + TableName;
object obj = ExecuteScalar(strsql);
if (obj == null)
{
return 1;
}
else
{
return int.Parse(obj.ToString());
}
}
#endregion
#region Exists
/// <summary>
/// 检测一个记录是否存在(SQL语句方式)
/// </summary>
/// <param name="strSql"></param>
/// <returns></returns>
public bool Exists(string strSql)
{
object obj = ExecuteScalar(strSql);
int cmdresult;
if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
{
cmdresult = 0;
}
else
{
cmdresult = int.Parse(obj.ToString());
}
if (cmdresult == 0)
{
return false;
}
else
{
return true;
}
}
/// <summary>
/// 检测一个记录是否存在(SQL语句方式)
/// </summary>
/// <param name="strSql"></param>
/// <returns></returns>
private bool Exists(string strSql,string[] parmsName,ArrayList parmsValue)
{
SqlParameter[] cmdParms = SetSqlParameter(parmsName, parmsValue);
return Exists(strSql,cmdParms);
}
/// <summary>
/// 检测一个记录是否存在(SQL语句方式)
/// </summary>
/// <param name="strSql"></param>
/// <param name="cmdParms"></param>
/// <returns></returns>
private bool Exists(string strSql, params SqlParameter[] cmdParms)
{
object obj = ExecuteScalar(strSql, cmdParms);
int cmdresult;
if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
{
cmdresult = 0;
}
else
{
cmdresult = int.Parse(obj.ToString());
}
if (cmdresult == 0)
{
return false;
}
else
{
return true;
}
}
#endregion
#region ExecuteNonQuery
/// <summary>
/// 执行带参数存储过程,返回影响的记录数
/// </summary>
/// <param name="storedProcName">存储过程</param>
/// <returns>影响的记录数</returns>
public int ExecuteNonQuery(string storedProcName,params object[] paramsValue)
{
storedProcName = SetParmsValues(storedProcName, paramsValue);
using (SqlConnection connection = new SqlConnection(connectionString))
{
using (SqlCommand cmd = new SqlCommand(storedProcName,connection))
{
try
{
connection.Open();
int rows=cmd.ExecuteNonQuery();
return rows;
}
catch(SqlException E)
{
connection.Close();
throw new Exception(E.Message);
}
}
}
}
/// <summary>
/// 执行SQL语句或无参数存储过程,返回影响的记录数
/// </summary>
/// <param name="SQLString">SQL语句</param>
/// <returns>影响的记录数</returns>
public int ExecuteNonQuery(string SQLString)
{
using (SqlConnection connection = new SqlConnection(connectionString))
{
using (SqlCommand cmd = new SqlCommand(SQLString,connection))
{
try
{
connection.Open();
int rows=cmd.ExecuteNonQuery();
return rows;
}
catch(SqlException E)
{
connection.Close();
throw new Exception(E.Message);
}
}
}
}
/// <summary>
/// 执行带一个存储过程参数的的SQL语句。
/// </summary>
/// <param name="SQLString">SQL语句</param>
/// <param name="content">参数内容,比如一个字段是格式复杂的文章,有特殊符号,可以通过这个方式添加</param>
/// <returns>影响的记录数</returns>
private int ExecuteNonQuery(string SQLString,string content)
{
using (SqlConnection connection = new SqlConnection(connectionString))
{
SqlCommand cmd = new SqlCommand(SQLString,connection);
SqlParameter myParameter = new SqlParameter( "@content", SqlDbType.NText);
myParameter.Value = content ;
cmd.Parameters.Add(myParameter);
try
{
connection.Open();
int rows=cmd.ExecuteNonQuery();
return rows;
}
catch(SqlException E)
{
throw new Exception(E.Message);
}
finally
{
cmd.Dispose();
connection.Close();
}
}
}
/// <summary>
/// 向数据库里插入图像格式的字段(和上面情况类似的另一种实例)
/// </summary>
/// <param name="strSQL">SQL语句</param>
/// <param name="fs">图像字节,数据库的字段类型为image的情况</param>
/// <returns>影响的记录数</returns>
private int ExecuteNonQuery(string strSQL,byte[] fs)
{
using (SqlConnection connection = new SqlConnection(connectionString))
{
SqlCommand cmd = new SqlCommand(strSQL,connection);
SqlParameter myParameter = new SqlParameter ( "@fs", SqlDbType.Image);
myParameter.Value = fs ;
cmd.Parameters.Add(myParameter);
try
{
connection.Open();
int rows=cmd.ExecuteNonQuery();
return rows;
}
catch(SqlException E)
{
throw new Exception(E.Message);
}
finally
{
cmd.Dispose();
connection.Close();
}
}
}
/// <summary>
/// 执行SQL语句,返回影响的记录数
/// </summary>
/// <param name="SQLString">SQL语句</param>
/// <returns>影响的记录数</returns>
private int ExecuteNonQuery(string SQLString,string[] parmsName,ArrayList parmsValue)
{
SqlParameter[] cmdParms = SetSqlParameter(parmsName, parmsValue);
return ExecuteNonQuery(SQLString, cmdParms);
}
/// <summary>
/// 执行SQL语句,返回影响的记录数
/// </summary>
/// <param name="SQLString">SQL语句</param>
/// <returns>影响的记录数</returns>
private int ExecuteNonQuery(string SQLString,params SqlParameter[] cmdParms)
{
using (SqlConnection connection = new SqlConnection(connectionString))
{
using (SqlCommand cmd = new SqlCommand())
{
try
{
PrepareCommand(cmd, connection, null,SQLString, cmdParms);
int rows=cmd.ExecuteNonQuery();
cmd.Parameters.Clear();
return rows;
}
catch(SqlException E)
{
throw new Exception(E.Message);
}
}
}
}
/// <summary>
/// 执行存储过程,返回影响的行数
/// </summary>
/// <param name="storedProcName">存储过程名</param>
/// <param name="rowsAffected">影响的行数</param>
/// <returns></returns>
private int ExecuteNonQuery(string storedProcName,string[] parmsName,ArrayList parmsValue,out int rowsAffected)
{
IDataParameter[] parameters = SetSqlParameter(parmsName,parmsValue);
int returnValue = ExecuteNonQuery(storedProcName, parameters,out rowsAffected);
return returnValue;
}
/// <summary>
/// 执行存储过程,返回影响的行数
/// </summary>
/// <param name="storedProcName">存储过程名</param>
/// <param name="parameters">存储过程参数</param>
/// <param name="rowsAffected">影响的行数</param>
/// <returns></returns>
private int ExecuteNonQuery(string storedProcName, IDataParameter[] parameters, out int rowsAffected)
{
using (SqlConnection connection = new SqlConnection(connectionString))
{
int result;
connection.Open();
SqlCommand command = BuildIntCommand(connection,storedProcName, parameters );
rowsAffected = command.ExecuteNonQuery();
result = (int)command.Parameters["ReturnValue"].Value;
return result;
}
}
#endregion
#region ExecuteScalar
/// <summary>
/// 执行一条计算查询结果语句,返回查询结果(object)。
/// </summary>
/// <param name="storedProcName">存储过程</param>
/// <returns>查询结果(object)</returns>
public object ExecuteScalar(string storedProcName,params object[] parmsValue)
{
storedProcName = SetParmsValues(storedProcName, parmsValue);
return ExecuteScalar(storedProcName);
}
/// <summary>
/// 执行一条计算查询结果语句,返回查询结果(object)。
/// </summary>
/// <param name="SQLString">计算查询结果语句</param>
/// <returns>查询结果(object)</returns>
public object ExecuteScalar(string SQLString)
{
using (SqlConnection connection = new SqlConnection(connectionString))
{
using(SqlCommand cmd = new SqlCommand(SQLString,connection))
{
try
{
connection.Open();
object obj = cmd.ExecuteScalar();
if((Object.Equals(obj,null))||(Object.Equals(obj,System.DBNull.Value)))
{
return null;
}
else
{
return obj;
}
}
catch(SqlException e)
{
connection.Close();
throw new Exception(e.Message);
}
}
}
}
/// <summary>
/// 执行一条计算查询结果语句,返回查询结果(object)。
/// </summary>
/// <param name="storedProcName">存储过程</param>
/// <returns>查询结果(object)</returns>
public object ExecuteScalar(string storedProcName,string[] parmsName,ArrayList parmsValue)
{
SqlParameter[] cmdParms = SetSqlParameter(parmsName, parmsValue);
return ExecuteScalar(storedProcName, cmdParms);
}
/// <summary>
/// 执行一条计算查询结果语句,返回查询结果(object)。
/// </summary>
/// <param name="SQLString">计算查询结果语句</param>
/// <param name="cmdParms">Sql参数</param>
/// <returns>查询结果(object)</returns>
private object ExecuteScalar(string SQLString,params SqlParameter[] cmdParms)
{
using (SqlConnection connection = new SqlConnection(connectionString))
{
using (SqlCommand cmd = new SqlCommand())
{
try
{
PrepareCommand(cmd, connection, null,SQLString, cmdParms);
object obj = cmd.ExecuteScalar();
cmd.Parameters.Clear();
if((Object.Equals(obj,null))||(Object.Equals(obj,System.DBNull.Value)))
{
return null;
}
else
{
return obj;
}
}
catch(SqlException e)
{
throw new Exception(e.Message);
}
}
}
}
#endregion
#region ExecuteReader
/// <summary>
/// 执行查询语句,返回SqlDataReader
/// </summary>
/// <param name="strSQL">查询语句</param>
/// <returns>SqlDataReader</returns>
public SqlDataReader ExecuteReader(string strSQL)
{
SqlConnection connection = new SqlConnection(connectionString);
SqlCommand cmd = new SqlCommand(strSQL,connection);
try
{
connection.Open();
SqlDataReader myReader = cmd.ExecuteReader();
return myReader;
}
catch(SqlException e)
{
throw new Exception(e.Message);
}
}
/// <summary>
/// 执行查询语句,返回SqlDataReader
/// </summary>
/// <param name="SQLString">查询语句</param>
/// <returns>SqlDataReader</returns>
private SqlDataReader ExecuteReader(string SQLString,params SqlParameter[] cmdParms)
{
SqlConnection connection = new SqlConnection(connectionString);
SqlCommand cmd = new SqlCommand();
try
{
PrepareCommand(cmd, connection, null,SQLString, cmdParms);
SqlDataReader myReader = cmd.ExecuteReader();
cmd.Parameters.Clear();
return myReader;
}
catch(SqlException e)
{
throw new Exception(e.Message);
}
}
/// <summary>
/// 执行存储过程
/// </summary>
/// <param name="storedProcName">存储过程名</param>
/// <returns>SqlDataReader</returns>
public SqlDataReader ExecuteReader(string storedProcName,params object[] parmsValue)
{
string sqlWithParmsValue = SetParmsValues(storedProcName, parmsValue);
return ExecuteReader(sqlWithParmsValue);
}
/// <summary>
/// 执行存储过程
/// </summary>
/// <param name="storedProcName">存储过程名</param>
/// <returns>SqlDataReader</returns>
public SqlDataReader ExecuteReader(string storedProcName,string[] parmsName,ArrayList parmsValue)
{
IDataParameter[] parameters = SetSqlParameter(parmsName, parmsValue);
return ExecuteReader(storedProcName, parameters);
}
/// <summary>
/// 执行存储过程
/// </summary>
/// <param name="storedProcName">存储过程名</param>
/// <param name="parameters">存储过程参数</param>
/// <returns>SqlDataReader</returns>
private SqlDataReader ExecuteReader(string storedProcName, IDataParameter[] parameters )
{
SqlConnection connection = new SqlConnection(connectionString);
SqlDataReader returnReader;
connection.Open();
SqlCommand command = BuildQueryCommand( connection,storedProcName, parameters );
command.CommandType = CommandType.StoredProcedure;
returnReader = command.ExecuteReader();
return returnReader;
}
#endregion
#region ExecuteDataRow
/// <summary>
/// 执行查询语句,返回DataRow
/// </summary>
/// <param name="SQLString">查询语句</param>
/// <returns>DataRow</returns>
public DataRow ExecuteDataRow(string SQLString)
{
DataRow dr = ExecuteDataSet(SQLString).Tables[0].Rows[0];
return dr;
}
#endregion
#region ExecuteDataSet
/// <summary>
/// 执行查询语句,返回DataSet
/// </summary>
/// <param name="SQLString">查询语句</param>
/// <returns>DataSet</returns>
public DataSet ExecuteDataSet(string SQLString)
{
using (SqlConnection connection = new SqlConnection(connectionString))
{
DataSet ds = new DataSet();
try
{
connection.Open();
SqlDataAdapter command = new SqlDataAdapter(SQLString,connection);
command.Fill(ds,"ds");
}
catch(SqlException ex)
{
throw new Exception(ex.Message);
}
return ds;
}
}
/// <summary>
/// 执行查询语句,返回DataSet
/// </summary>
/// <param name="SQLString">查询语句</param>
/// <returns>DataSet</returns>
// private DataSet ExecuteDataSet(string SQLString,string[] parmsName,ArrayList parmsValue)
// {
// SqlParameter[] cmdParms = SetSqlParameter(parmsName, parmsValue);
// return ExecuteDataSet(SQLString, cmdParms);
// }
/// <summary>
/// 执行存储过程,返回DataSet
/// </summary>
/// <param name="storedProcName">存储过程名</param>
/// <param name="parmsValue">参数值</param>
/// <returns>DataSet</returns>
public DataSet ExecuteDataSet(string storedProcName,params object[] parmsValue)
{
string sqlWithParmsValue = SetParmsValues(storedProcName, parmsValue);
return ExecuteDataSet(sqlWithParmsValue);
}
/// <summary>
/// 执行查询语句,返回DataSet
/// </summary>
/// <param name="SQLString">查询语句</param>
/// <returns>DataSet</returns>
private DataSet ExecuteDataSet(string SQLString,params SqlParameter[] cmdParms)
{
using (SqlConnection connection = new SqlConnection(connectionString))
{
SqlCommand cmd = new SqlCommand();
PrepareCommand(cmd, connection, null,SQLString, cmdParms);
using( SqlDataAdapter da = new SqlDataAdapter(cmd) )
{
DataSet ds = new DataSet();
try
{
da.Fill(ds,"ds");
cmd.Parameters.Clear();
}
catch(SqlException ex)
{
throw new Exception(ex.Message);
}
return ds;
}
}
}
/// <summary>
/// 执行存储过程
/// </summary>
/// <param name="storedProcName">存储过程名</param>
/// <returns>DataSet</returns>
public DataSet ExecuteDataSet(string storedProcName,string[] parmsName,ArrayList parmsValue)
{
IDataParameter[] parameters = SetSqlParameter(parmsName, parmsValue);
return ExecuteDataSet(storedProcName, parameters,"ZXYTable");
}
/// <summary>
/// 执行存储过程
/// </summary>
/// <param name="storedProcName">存储过程名</param>
/// <param name="tableName">DataSet结果中的表名</param>
/// <returns>DataSet</returns>
public DataSet ExecuteDataSet(string storedProcName,string[] parmsName,ArrayList parmsValue, string tableName)
{
IDataParameter[] parameters = SetSqlParameter(parmsName, parmsValue);
return ExecuteDataSet(storedProcName, parameters, tableName);
}
/// <summary>
/// 执行存储过程
/// </summary>
/// <param name="storedProcName">存储过程名</param>
/// <param name="parameters">存储过程参数</param>
/// <param name="tableName">DataSet结果中的表名</param>
/// <returns>DataSet</returns>
private DataSet ExecuteDataSet(string storedProcName, IDataParameter[] parameters, string tableName)
{
using (SqlConnection connection = new SqlConnection(connectionString))
{
DataSet dataSet = new DataSet();
connection.Open();
SqlDataAdapter sqlDA = new SqlDataAdapter();
sqlDA.SelectCommand = BuildQueryCommand(connection, storedProcName, parameters );
sqlDA.Fill( dataSet, tableName );
connection.Close();
return dataSet;
}
}
#endregion
#region ExecuteSqlTran
/// <summary>
/// 执行多条SQL语句,实现数据库事务。
/// </summary>
/// <param name="SQLStringList">多条SQL语句</param>
public void ExecuteSqlTran(ArrayList SQLStringList)
{
using (SqlConnection conn = new SqlConnection(connectionString))
{
conn.Open();
SqlCommand cmd = new SqlCommand();
cmd.Connection=conn;
SqlTransaction tx=conn.BeginTransaction();
cmd.Transaction=tx;
try
{
for(int n=0;n<SQLStringList.Count;n++)
{
string strsql=SQLStringList[n].ToString();
if (strsql.Trim().Length>1)
{
cmd.CommandText=strsql;
cmd.ExecuteNonQuery();
}
}
tx.Commit();
}
catch(SqlException E)
{
tx.Rollback();
throw new Exception(E.Message);
}
}
}
/// <summary>
/// 执行多条SQL语句,实现数据库事务。
/// </summary>
/// <param name="SQLStringList">SQL语句的哈希表(key为sql语句,value是该语句的SqlParameter[])</param>
public void ExecuteSqlTran(Hashtable SQLStringList)
{
using (SqlConnection conn = new SqlConnection(connectionString))
{
conn.Open();
using (SqlTransaction trans = conn.BeginTransaction())
{
SqlCommand cmd = new SqlCommand();
try
{
//循环
foreach (DictionaryEntry myDE in SQLStringList)
{
string cmdText=myDE.Key.ToString();
SqlParameter[] cmdParms=(SqlParameter[])myDE.Value;
PrepareCommand(cmd,conn,trans,cmdText, cmdParms);
int val = cmd.ExecuteNonQuery();
cmd.Parameters.Clear();
trans.Commit();
}
}
catch
{
trans.Rollback();
throw;
}
}
}
}
#endregion
#endregion
#endregion
}
}
using System.Collections;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;
namespace ZXY.Modules.DataAccess
{
/// <summary>
/// 数据访问基础类(基于SQLServer)
/// 张信元
/// 2007-03-30
public class DataProvider
{
#region 变量
private string connectionString = string.Empty;
#endregion
#region 方法
#region 构造函数
/// <summary>
/// 创建数据提供对象
/// </summary>
/// <param name="dbConnectionStrParmName">数据库连接串在config中的参数名称</param>
public DataProvider(string dbConnectionStrParmName)
{
connectionString = ConfigurationSettings.AppSettings[dbConnectionStrParmName];
}
// /// <summary>
// /// 创建数据提供对象
// /// </summary>
// /// <param name="server">服务器名称</param>
// /// <param name="dataBase">数据库名称</param>
// /// <param name="uid">用户名</param>
// /// <param name="pwd">密码</param>
// public DataProvider(string server,string dataBase,string uid,string pwd)
// {
// connectionString = "server="+server+";DataBase="+dataBase+";uid="+uid+";pwd="+pwd+";";
// }
//
#endregion
#region 私有方法
/// <summary>
/// 设定SQL语句
/// </summary>
/// <param name="storedProcName">存储过程名</param>
/// <param name="parmsValue">参数值</param>
/// <returns>sql语句</returns>
private string SetParmsValues(string storedProcName,params object[] parmsValue)
{
string strSql = string.Empty;
for(int i=0;i<parmsValue.Length;i++)
{
strSql = string.Format(storedProcName + " '{0}'", parmsValue[i]);
if(parmsValue.Length>1)
{
if(i!=parmsValue.Length-1)
{
strSql = string.Format(storedProcName + " '{0}',", parmsValue[i]);
}
}
storedProcName = strSql;
}
return strSql;
}
#region TEMP
/*
/// <summary>
/// ArrayList类型转换成数据参数类型
/// </summary>
/// <param name="parmsValue"></param>
/// <returns></returns>
private IDataParameter[] SetSqlParameter(string[] parmsName,ArrayList parmsValue)
{
int count = parmsName.Length;
SqlParameter[] parameters = new SqlParameter[count];
for(int i=0;i<count;i++)
{
parameters[i] = new SqlParameter(parmsName[i],parmsValue[i].GetType());
parameters[i].Value = parmsValue[i];
}
return parameters;
}
*/
#endregion
/// <summary>
/// 数据参数赋值
/// </summary>
/// <param name="parmsName">参数名称</param>
/// <param name="parmsValue">参数值</param>
/// <returns></returns>
private SqlParameter[] SetSqlParameter(string[] parmsName,ArrayList parmsValue)
{
int count = parmsName.Length;
SqlParameter[] parameters = new SqlParameter[count];
for(int i=0;i<count;i++)
{
parameters[i] = new SqlParameter(parmsName[i],parmsValue[i].GetType());
parameters[i].Value = parmsValue[i];
}
return parameters;
}
/// <summary>
///
/// </summary>
/// <param name="cmd"></param>
/// <param name="conn"></param>
/// <param name="trans"></param>
/// <param name="cmdText"></param>
/// <param name="cmdParms"></param>
private void PrepareCommand(SqlCommand cmd,SqlConnection conn,SqlTransaction trans, string cmdText, SqlParameter[] cmdParms)
{
if (conn.State != ConnectionState.Open)
conn.Open();
cmd.Connection = conn;
cmd.CommandText = cmdText;
if (trans != null)
cmd.Transaction = trans;
cmd.CommandType = CommandType.Text;//cmdType;
if (cmdParms != null)
{
foreach (SqlParameter parm in cmdParms)
cmd.Parameters.Add(parm);
}
}
/// <summary>
/// 构建 SqlCommand 对象(用来返回一个结果集,而不是一个整数值)
/// </summary>
/// <param name="connection">数据库连接</param>
/// <param name="storedProcName">存储过程名</param>
/// <param name="parameters">存储过程参数</param>
/// <returns>SqlCommand</returns>
private SqlCommand BuildQueryCommand(SqlConnection connection,string storedProcName, IDataParameter[] parameters)
{
SqlCommand command = new SqlCommand( storedProcName, connection );
command.CommandType = CommandType.StoredProcedure;
foreach (SqlParameter parameter in parameters)
{
command.Parameters.Add( parameter );
}
return command;
}
/// <summary>
/// 创建 SqlCommand 对象实例(用来返回一个整数值)
/// </summary>
/// <param name="storedProcName">存储过程名</param>
/// <param name="parameters">存储过程参数</param>
/// <returns>SqlCommand 对象实例</returns>
private SqlCommand BuildIntCommand(SqlConnection connection,string storedProcName, IDataParameter[] parameters)
{
SqlCommand command = BuildQueryCommand(connection,storedProcName, parameters );
command.Parameters.Add( new SqlParameter ( "ReturnValue",
SqlDbType.Int,4,ParameterDirection.ReturnValue,
false,0,0,string.Empty,DataRowVersion.Default,null ));
return command;
}
#endregion
#region 公用方法
#region GetMaxID
/// <summary>
/// 获取表某个字段的最大值
/// </summary>
/// <param name="FieldName">字段名称</param>
/// <param name="TableName">表名称</param>
/// <returns></returns>
public int GetMaxID(string FieldName,string TableName)
{
string strsql = "select max(" + FieldName + ")+1 from " + TableName;
object obj = ExecuteScalar(strsql);
if (obj == null)
{
return 1;
}
else
{
return int.Parse(obj.ToString());
}
}
#endregion
#region Exists
/// <summary>
/// 检测一个记录是否存在(SQL语句方式)
/// </summary>
/// <param name="strSql"></param>
/// <returns></returns>
public bool Exists(string strSql)
{
object obj = ExecuteScalar(strSql);
int cmdresult;
if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
{
cmdresult = 0;
}
else
{
cmdresult = int.Parse(obj.ToString());
}
if (cmdresult == 0)
{
return false;
}
else
{
return true;
}
}
/// <summary>
/// 检测一个记录是否存在(SQL语句方式)
/// </summary>
/// <param name="strSql"></param>
/// <returns></returns>
private bool Exists(string strSql,string[] parmsName,ArrayList parmsValue)
{
SqlParameter[] cmdParms = SetSqlParameter(parmsName, parmsValue);
return Exists(strSql,cmdParms);
}
/// <summary>
/// 检测一个记录是否存在(SQL语句方式)
/// </summary>
/// <param name="strSql"></param>
/// <param name="cmdParms"></param>
/// <returns></returns>
private bool Exists(string strSql, params SqlParameter[] cmdParms)
{
object obj = ExecuteScalar(strSql, cmdParms);
int cmdresult;
if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
{
cmdresult = 0;
}
else
{
cmdresult = int.Parse(obj.ToString());
}
if (cmdresult == 0)
{
return false;
}
else
{
return true;
}
}
#endregion
#region ExecuteNonQuery
/// <summary>
/// 执行带参数存储过程,返回影响的记录数
/// </summary>
/// <param name="storedProcName">存储过程</param>
/// <returns>影响的记录数</returns>
public int ExecuteNonQuery(string storedProcName,params object[] paramsValue)
{
storedProcName = SetParmsValues(storedProcName, paramsValue);
using (SqlConnection connection = new SqlConnection(connectionString))
{
using (SqlCommand cmd = new SqlCommand(storedProcName,connection))
{
try
{
connection.Open();
int rows=cmd.ExecuteNonQuery();
return rows;
}
catch(SqlException E)
{
connection.Close();
throw new Exception(E.Message);
}
}
}
}
/// <summary>
/// 执行SQL语句或无参数存储过程,返回影响的记录数
/// </summary>
/// <param name="SQLString">SQL语句</param>
/// <returns>影响的记录数</returns>
public int ExecuteNonQuery(string SQLString)
{
using (SqlConnection connection = new SqlConnection(connectionString))
{
using (SqlCommand cmd = new SqlCommand(SQLString,connection))
{
try
{
connection.Open();
int rows=cmd.ExecuteNonQuery();
return rows;
}
catch(SqlException E)
{
connection.Close();
throw new Exception(E.Message);
}
}
}
}
/// <summary>
/// 执行带一个存储过程参数的的SQL语句。
/// </summary>
/// <param name="SQLString">SQL语句</param>
/// <param name="content">参数内容,比如一个字段是格式复杂的文章,有特殊符号,可以通过这个方式添加</param>
/// <returns>影响的记录数</returns>
private int ExecuteNonQuery(string SQLString,string content)
{
using (SqlConnection connection = new SqlConnection(connectionString))
{
SqlCommand cmd = new SqlCommand(SQLString,connection);
SqlParameter myParameter = new SqlParameter( "@content", SqlDbType.NText);
myParameter.Value = content ;
cmd.Parameters.Add(myParameter);
try
{
connection.Open();
int rows=cmd.ExecuteNonQuery();
return rows;
}
catch(SqlException E)
{
throw new Exception(E.Message);
}
finally
{
cmd.Dispose();
connection.Close();
}
}
}
/// <summary>
/// 向数据库里插入图像格式的字段(和上面情况类似的另一种实例)
/// </summary>
/// <param name="strSQL">SQL语句</param>
/// <param name="fs">图像字节,数据库的字段类型为image的情况</param>
/// <returns>影响的记录数</returns>
private int ExecuteNonQuery(string strSQL,byte[] fs)
{
using (SqlConnection connection = new SqlConnection(connectionString))
{
SqlCommand cmd = new SqlCommand(strSQL,connection);
SqlParameter myParameter = new SqlParameter ( "@fs", SqlDbType.Image);
myParameter.Value = fs ;
cmd.Parameters.Add(myParameter);
try
{
connection.Open();
int rows=cmd.ExecuteNonQuery();
return rows;
}
catch(SqlException E)
{
throw new Exception(E.Message);
}
finally
{
cmd.Dispose();
connection.Close();
}
}
}
/// <summary>
/// 执行SQL语句,返回影响的记录数
/// </summary>
/// <param name="SQLString">SQL语句</param>
/// <returns>影响的记录数</returns>
private int ExecuteNonQuery(string SQLString,string[] parmsName,ArrayList parmsValue)
{
SqlParameter[] cmdParms = SetSqlParameter(parmsName, parmsValue);
return ExecuteNonQuery(SQLString, cmdParms);
}
/// <summary>
/// 执行SQL语句,返回影响的记录数
/// </summary>
/// <param name="SQLString">SQL语句</param>
/// <returns>影响的记录数</returns>
private int ExecuteNonQuery(string SQLString,params SqlParameter[] cmdParms)
{
using (SqlConnection connection = new SqlConnection(connectionString))
{
using (SqlCommand cmd = new SqlCommand())
{
try
{
PrepareCommand(cmd, connection, null,SQLString, cmdParms);
int rows=cmd.ExecuteNonQuery();
cmd.Parameters.Clear();
return rows;
}
catch(SqlException E)
{
throw new Exception(E.Message);
}
}
}
}
/// <summary>
/// 执行存储过程,返回影响的行数
/// </summary>
/// <param name="storedProcName">存储过程名</param>
/// <param name="rowsAffected">影响的行数</param>
/// <returns></returns>
private int ExecuteNonQuery(string storedProcName,string[] parmsName,ArrayList parmsValue,out int rowsAffected)
{
IDataParameter[] parameters = SetSqlParameter(parmsName,parmsValue);
int returnValue = ExecuteNonQuery(storedProcName, parameters,out rowsAffected);
return returnValue;
}
/// <summary>
/// 执行存储过程,返回影响的行数
/// </summary>
/// <param name="storedProcName">存储过程名</param>
/// <param name="parameters">存储过程参数</param>
/// <param name="rowsAffected">影响的行数</param>
/// <returns></returns>
private int ExecuteNonQuery(string storedProcName, IDataParameter[] parameters, out int rowsAffected)
{
using (SqlConnection connection = new SqlConnection(connectionString))
{
int result;
connection.Open();
SqlCommand command = BuildIntCommand(connection,storedProcName, parameters );
rowsAffected = command.ExecuteNonQuery();
result = (int)command.Parameters["ReturnValue"].Value;
return result;
}
}
#endregion
#region ExecuteScalar
/// <summary>
/// 执行一条计算查询结果语句,返回查询结果(object)。
/// </summary>
/// <param name="storedProcName">存储过程</param>
/// <returns>查询结果(object)</returns>
public object ExecuteScalar(string storedProcName,params object[] parmsValue)
{
storedProcName = SetParmsValues(storedProcName, parmsValue);
return ExecuteScalar(storedProcName);
}
/// <summary>
/// 执行一条计算查询结果语句,返回查询结果(object)。
/// </summary>
/// <param name="SQLString">计算查询结果语句</param>
/// <returns>查询结果(object)</returns>
public object ExecuteScalar(string SQLString)
{
using (SqlConnection connection = new SqlConnection(connectionString))
{
using(SqlCommand cmd = new SqlCommand(SQLString,connection))
{
try
{
connection.Open();
object obj = cmd.ExecuteScalar();
if((Object.Equals(obj,null))||(Object.Equals(obj,System.DBNull.Value)))
{
return null;
}
else
{
return obj;
}
}
catch(SqlException e)
{
connection.Close();
throw new Exception(e.Message);
}
}
}
}
/// <summary>
/// 执行一条计算查询结果语句,返回查询结果(object)。
/// </summary>
/// <param name="storedProcName">存储过程</param>
/// <returns>查询结果(object)</returns>
public object ExecuteScalar(string storedProcName,string[] parmsName,ArrayList parmsValue)
{
SqlParameter[] cmdParms = SetSqlParameter(parmsName, parmsValue);
return ExecuteScalar(storedProcName, cmdParms);
}
/// <summary>
/// 执行一条计算查询结果语句,返回查询结果(object)。
/// </summary>
/// <param name="SQLString">计算查询结果语句</param>
/// <param name="cmdParms">Sql参数</param>
/// <returns>查询结果(object)</returns>
private object ExecuteScalar(string SQLString,params SqlParameter[] cmdParms)
{
using (SqlConnection connection = new SqlConnection(connectionString))
{
using (SqlCommand cmd = new SqlCommand())
{
try
{
PrepareCommand(cmd, connection, null,SQLString, cmdParms);
object obj = cmd.ExecuteScalar();
cmd.Parameters.Clear();
if((Object.Equals(obj,null))||(Object.Equals(obj,System.DBNull.Value)))
{
return null;
}
else
{
return obj;
}
}
catch(SqlException e)
{
throw new Exception(e.Message);
}
}
}
}
#endregion
#region ExecuteReader
/// <summary>
/// 执行查询语句,返回SqlDataReader
/// </summary>
/// <param name="strSQL">查询语句</param>
/// <returns>SqlDataReader</returns>
public SqlDataReader ExecuteReader(string strSQL)
{
SqlConnection connection = new SqlConnection(connectionString);
SqlCommand cmd = new SqlCommand(strSQL,connection);
try
{
connection.Open();
SqlDataReader myReader = cmd.ExecuteReader();
return myReader;
}
catch(SqlException e)
{
throw new Exception(e.Message);
}
}
/// <summary>
/// 执行查询语句,返回SqlDataReader
/// </summary>
/// <param name="SQLString">查询语句</param>
/// <returns>SqlDataReader</returns>
private SqlDataReader ExecuteReader(string SQLString,params SqlParameter[] cmdParms)
{
SqlConnection connection = new SqlConnection(connectionString);
SqlCommand cmd = new SqlCommand();
try
{
PrepareCommand(cmd, connection, null,SQLString, cmdParms);
SqlDataReader myReader = cmd.ExecuteReader();
cmd.Parameters.Clear();
return myReader;
}
catch(SqlException e)
{
throw new Exception(e.Message);
}
}
/// <summary>
/// 执行存储过程
/// </summary>
/// <param name="storedProcName">存储过程名</param>
/// <returns>SqlDataReader</returns>
public SqlDataReader ExecuteReader(string storedProcName,params object[] parmsValue)
{
string sqlWithParmsValue = SetParmsValues(storedProcName, parmsValue);
return ExecuteReader(sqlWithParmsValue);
}
/// <summary>
/// 执行存储过程
/// </summary>
/// <param name="storedProcName">存储过程名</param>
/// <returns>SqlDataReader</returns>
public SqlDataReader ExecuteReader(string storedProcName,string[] parmsName,ArrayList parmsValue)
{
IDataParameter[] parameters = SetSqlParameter(parmsName, parmsValue);
return ExecuteReader(storedProcName, parameters);
}
/// <summary>
/// 执行存储过程
/// </summary>
/// <param name="storedProcName">存储过程名</param>
/// <param name="parameters">存储过程参数</param>
/// <returns>SqlDataReader</returns>
private SqlDataReader ExecuteReader(string storedProcName, IDataParameter[] parameters )
{
SqlConnection connection = new SqlConnection(connectionString);
SqlDataReader returnReader;
connection.Open();
SqlCommand command = BuildQueryCommand( connection,storedProcName, parameters );
command.CommandType = CommandType.StoredProcedure;
returnReader = command.ExecuteReader();
return returnReader;
}
#endregion
#region ExecuteDataRow
/// <summary>
/// 执行查询语句,返回DataRow
/// </summary>
/// <param name="SQLString">查询语句</param>
/// <returns>DataRow</returns>
public DataRow ExecuteDataRow(string SQLString)
{
DataRow dr = ExecuteDataSet(SQLString).Tables[0].Rows[0];
return dr;
}
#endregion
#region ExecuteDataSet
/// <summary>
/// 执行查询语句,返回DataSet
/// </summary>
/// <param name="SQLString">查询语句</param>
/// <returns>DataSet</returns>
public DataSet ExecuteDataSet(string SQLString)
{
using (SqlConnection connection = new SqlConnection(connectionString))
{
DataSet ds = new DataSet();
try
{
connection.Open();
SqlDataAdapter command = new SqlDataAdapter(SQLString,connection);
command.Fill(ds,"ds");
}
catch(SqlException ex)
{
throw new Exception(ex.Message);
}
return ds;
}
}
/// <summary>
/// 执行查询语句,返回DataSet
/// </summary>
/// <param name="SQLString">查询语句</param>
/// <returns>DataSet</returns>
// private DataSet ExecuteDataSet(string SQLString,string[] parmsName,ArrayList parmsValue)
// {
// SqlParameter[] cmdParms = SetSqlParameter(parmsName, parmsValue);
// return ExecuteDataSet(SQLString, cmdParms);
// }
/// <summary>
/// 执行存储过程,返回DataSet
/// </summary>
/// <param name="storedProcName">存储过程名</param>
/// <param name="parmsValue">参数值</param>
/// <returns>DataSet</returns>
public DataSet ExecuteDataSet(string storedProcName,params object[] parmsValue)
{
string sqlWithParmsValue = SetParmsValues(storedProcName, parmsValue);
return ExecuteDataSet(sqlWithParmsValue);
}
/// <summary>
/// 执行查询语句,返回DataSet
/// </summary>
/// <param name="SQLString">查询语句</param>
/// <returns>DataSet</returns>
private DataSet ExecuteDataSet(string SQLString,params SqlParameter[] cmdParms)
{
using (SqlConnection connection = new SqlConnection(connectionString))
{
SqlCommand cmd = new SqlCommand();
PrepareCommand(cmd, connection, null,SQLString, cmdParms);
using( SqlDataAdapter da = new SqlDataAdapter(cmd) )
{
DataSet ds = new DataSet();
try
{
da.Fill(ds,"ds");
cmd.Parameters.Clear();
}
catch(SqlException ex)
{
throw new Exception(ex.Message);
}
return ds;
}
}
}
/// <summary>
/// 执行存储过程
/// </summary>
/// <param name="storedProcName">存储过程名</param>
/// <returns>DataSet</returns>
public DataSet ExecuteDataSet(string storedProcName,string[] parmsName,ArrayList parmsValue)
{
IDataParameter[] parameters = SetSqlParameter(parmsName, parmsValue);
return ExecuteDataSet(storedProcName, parameters,"ZXYTable");
}
/// <summary>
/// 执行存储过程
/// </summary>
/// <param name="storedProcName">存储过程名</param>
/// <param name="tableName">DataSet结果中的表名</param>
/// <returns>DataSet</returns>
public DataSet ExecuteDataSet(string storedProcName,string[] parmsName,ArrayList parmsValue, string tableName)
{
IDataParameter[] parameters = SetSqlParameter(parmsName, parmsValue);
return ExecuteDataSet(storedProcName, parameters, tableName);
}
/// <summary>
/// 执行存储过程
/// </summary>
/// <param name="storedProcName">存储过程名</param>
/// <param name="parameters">存储过程参数</param>
/// <param name="tableName">DataSet结果中的表名</param>
/// <returns>DataSet</returns>
private DataSet ExecuteDataSet(string storedProcName, IDataParameter[] parameters, string tableName)
{
using (SqlConnection connection = new SqlConnection(connectionString))
{
DataSet dataSet = new DataSet();
connection.Open();
SqlDataAdapter sqlDA = new SqlDataAdapter();
sqlDA.SelectCommand = BuildQueryCommand(connection, storedProcName, parameters );
sqlDA.Fill( dataSet, tableName );
connection.Close();
return dataSet;
}
}
#endregion
#region ExecuteSqlTran
/// <summary>
/// 执行多条SQL语句,实现数据库事务。
/// </summary>
/// <param name="SQLStringList">多条SQL语句</param>
public void ExecuteSqlTran(ArrayList SQLStringList)
{
using (SqlConnection conn = new SqlConnection(connectionString))
{
conn.Open();
SqlCommand cmd = new SqlCommand();
cmd.Connection=conn;
SqlTransaction tx=conn.BeginTransaction();
cmd.Transaction=tx;
try
{
for(int n=0;n<SQLStringList.Count;n++)
{
string strsql=SQLStringList[n].ToString();
if (strsql.Trim().Length>1)
{
cmd.CommandText=strsql;
cmd.ExecuteNonQuery();
}
}
tx.Commit();
}
catch(SqlException E)
{
tx.Rollback();
throw new Exception(E.Message);
}
}
}
/// <summary>
/// 执行多条SQL语句,实现数据库事务。
/// </summary>
/// <param name="SQLStringList">SQL语句的哈希表(key为sql语句,value是该语句的SqlParameter[])</param>
public void ExecuteSqlTran(Hashtable SQLStringList)
{
using (SqlConnection conn = new SqlConnection(connectionString))
{
conn.Open();
using (SqlTransaction trans = conn.BeginTransaction())
{
SqlCommand cmd = new SqlCommand();
try
{
//循环
foreach (DictionaryEntry myDE in SQLStringList)
{
string cmdText=myDE.Key.ToString();
SqlParameter[] cmdParms=(SqlParameter[])myDE.Value;
PrepareCommand(cmd,conn,trans,cmdText, cmdParms);
int val = cmd.ExecuteNonQuery();
cmd.Parameters.Clear();
trans.Commit();
}
}
catch
{
trans.Rollback();
throw;
}
}
}
}
#endregion
#endregion
#endregion
}
}
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