SqlHelper类

来源：互联网发布：nemo阿拉伯语软件编辑：程序博客网时间：2024/05/21 11:09

using System;
using System.Collections.Generic;
using System.Text;
using System.Data;
using System.Configuration;
using System.Data.SqlClient;

/// <summary>
/// SqlHelper 的摘要说明
/// </summary>
public static class SqlHelper1
{
   // readonly static string constr = ConfigurationManager.ConnectionStrings["constr"].ToString();
    readonly static string constr = "data source=10.1.1.247;database=haitian_MSCRM;uid=ht_crmselect;pwd=htpass@228";
    /// <summary>
    /// 提交返回数据集
    /// </summary>
    /// <param name="commandtype">选择执行方式的枚举</param>
    /// <param name="commandtext">sql语句或者存储过程名称</param>
    /// <param name="sps">参数的数组</param>
    /// <returns></returns>
    public static DataTable ExecuteDataSet(CommandType commandtype, string commandtext, params SqlParameter[] sps)
    {
        using (SqlConnection con = new SqlConnection(constr))
        {
            using (SqlCommand cmd = new SqlCommand(commandtext, con))
            {
          cmd.CommandType = commandtype;
                if (sps != null)
                {
                    foreach (SqlParameter var in sps)
                    {
                        cmd.Parameters.Add(var);
                    }
                }
                using (SqlDataAdapter da = new SqlDataAdapter(cmd))
                {
                    DataTable dt = new DataTable();
                    da.Fill(dt);
                    return dt;
                }
            }
        }
    }

    /// <summary>
    /// 用于执行insert、update、delete
    /// </summary>
    /// <param name="commandtype"></param>
    /// <param name="commandtext"></param>
    /// <param name="sps"></param>
    /// <returns></returns>
    public static int ExecuteNonQuery(CommandType commandtype, string commandtext, params SqlParameter[] sps)
    {
        using (SqlConnection con = new SqlConnection(constr))
        {
            using (SqlCommand cmd = new SqlCommand(commandtext, con))
            {
                cmd.CommandType = commandtype;
                if (sps != null)
                {
                    foreach (SqlParameter var in sps)
                    {
                        cmd.Parameters.Add(var);
                    }
                }
                con.Open();
                int count = cmd.ExecuteNonQuery();
                con.Close();
                return count;
            }
        }
    }
    /// <summary>
    /// 返回聚合函数值
    /// </summary>
    /// <param name="commandtype"></param>
    /// <param name="commandtext"></param>
    /// <param name="sps"></param>
    /// <returns></returns>
    public static object ExecuteScalar(CommandType commandtype, string commandtext, params SqlParameter[] sps)
    {
        using (SqlConnection con = new SqlConnection(constr))
        {
            using (SqlCommand cmd = new SqlCommand(commandtext, con))
            {
          cmd.CommandType = commandtype;
                if (sps != null)
                {
                    foreach (SqlParameter var in sps)
                    {
                        cmd.Parameters.Add(var);
                    }
                }
                con.Open();
                object o = cmd.ExecuteScalar(); //sql的聚合函数 Count（*）
                con.Close();
                return o;
            }
        }
    }

    /// <summary>
    /// 用于返回一行数据
    /// </summary>
    /// <param name="commandtype"></param>
    /// <param name="commandtext"></param>
    /// <param name="sps"></param>
    /// <returns></returns>
    public static SqlDataReader ExecuteReader(CommandType commandtype, string commandtext, params SqlParameter[] sps)
    {
        SqlConnection con = new SqlConnection(constr);
        using (SqlCommand cmd = new SqlCommand(commandtext, con))
        {
            cmd.CommandType = commandtype;
            if (sps != null)
            {
                foreach (SqlParameter var in sps)
                {
                    cmd.Parameters.Add(var);
                }
            }
            con.Open();
            SqlDataReader dr = cmd.ExecuteReader(CommandBehavior.CloseConnection);   //关闭读取器，将自动关闭该读取器上的连接对象
            return dr;
        }

}
}