asp.net 创建Access数据库

* 功能说明:备份和恢复SQL Server数据库
* 作者: 刘功勋;
* 版本:V0.1(C#2.0);时间:2007-1-1
* 当使用SQL Server时,请引用 COM组件中的,SQLDMO.dll组件
* 当使用Access中,请浏览添加引用以下两个dll
* 引用C:\Program Files\Common Files\System\ado\msadox.dll,该DLL包含ADOX命名空间
* 引用C:\Program Files\Common Files\System\ado\msjro.dll,该DLL包含JRO命名空间
* *******************************************************************************/
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.IO;
using ADOX;//该命名空间包含创建ACCESS的类(方法)--解决方案 ==> 引用 ==> 添加引用 ==> 游览找到.dll
using JRO;//该命名空间包含压缩ACCESS的类(方法)

namespace EC
{
/// <summary>
/// 数据库恢复和备份
/// </summary>
public class SqlBackObject
{
public SqlBackObject()
{
//
// TODO: 在此处添加构造函数逻辑
//
}

#region SQL数据库备份
/// <summary>
/// SQL数据库备份
/// </summary>
/// <param name="ServerIP">SQL服务器IP或(Localhost)</param>
/// <param name="LoginName">数据库登录名</param>
/// <param name="LoginPass">数据库登录密码</param>
/// <param name="DBName">数据库名</param>
/// <param name="BackPath">备份到的路径</param>
public static void SQLBACK(string ServerIP,string LoginName,string LoginPass,string DBName,string BackPath)

  {
SQLDMO.Backup oBackup = new SQLDMO.BackupClass();
SQLDMO.SQLServer oSQLServer = new SQLDMO.SQLServerClass();
try
{
oSQLServer.LoginSecure = false;
oSQLServer.Connect(ServerIP, LoginName, LoginPass);
oBackup.Database = DBName;
oBackup.Files = BackPath;
oBackup.BackupSetName = DBName;
oBackup.BackupSetDescription = "数据库备份";
oBackup.Initialize = true;
oBackup.SQLBackup(oSQLServer);

}
catch (Exception e)
{
throw new Exception(e.ToString());
}
finally
{
oSQLServer.DisConnect();
}
}
#endregion

#region SQL恢复数据库
/// <summary>
/// SQL恢复数据库
/// </summary>
/// <param name="ServerIP">SQL服务器IP或(Localhost)</param>
/// <param name="LoginName">数据库登录名</param>
/// <param name="LoginPass">数据库登录密码</param>
/// <param name="DBName">要还原的数据库名</param>

  /// <param name="BackPath">数据库备份的路径</param>

public static void SQLDbRestore(string ServerIP,string LoginName,string LoginPass,string DBName,string BackPath)
{

SQLDMO.Restore orestore = new SQLDMO.RestoreClass();
SQLDMO.SQLServer oSQLServer = new SQLDMO.SQLServerClass();
try
{
oSQLServer.LoginSecure = false;
oSQLServer.Connect(ServerIP, LoginName, LoginPass);
orestore.Action = SQLDMO.SQLDMO_RESTORE_TYPE.SQLDMORestore_Database;
orestore.Database = DBName;
orestore.Files = BackPath;
orestore.FileNumber = 1;
orestore.ReplaceDatabase = true;
orestore.SQLRestore(oSQLServer);

}
catch (Exception e)
{
throw new Exception(e.ToString());
}
finally
{
oSQLServer.DisConnect();
}
}

#endregion

#region 根据指定的文件名称创建Access数据库
/// <summary>
/// 根据指定的文件名称创建数据
/// </summary>
/// <param name="DBPath">绝对路径+文件名称</param>

  public static void CreateAccess(string DBPath)
{
if (File.Exists(DBPath))//检查数据库是否已存在
{
throw new Exception("目标数据库已存在,无法创建");
}
DBPath = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source="+DBPath;
//创建一个CatalogClass对象实例
ADOX.CatalogClass cat = new ADOX.CatalogClass();
//使用CatalogClass对象的Create方法创建ACCESS数据库
cat.Create(DBPath);

}
#endregion

#region 压缩Access数据库
/// <summary>
/// 压缩Access数据库
/// </summary>
/// <param name="DBPath">数据库绝对路径</param>
public static void CompactAccess(string DBPath)
{
if (!File.Exists(DBPath))
{
throw new Exception("目标数据库不存在,无法压缩");
}

//声明临时数据库名称
string temp = DateTime.Now.Year.ToString();
temp += DateTime.Now.Month.ToString();
temp += DateTime.Now.Day.ToString();
temp += DateTime.Now.Hour.ToString();
temp += DateTime.Now.Minute.ToString();
temp += DateTime.Now.Second.ToString() + ".bak";
temp = DBPath.Substring(0, DBPath.LastIndexOf("\\") + 1) + temp;

  //定义临时数据库的连接字符串
string temp2 = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source="+temp;
//定义目标数据库的连接字符串
string DBPath2 = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source="+DBPath;
//创建一个JetEngineClass对象的实例
JRO.JetEngineClass jt = new JRO.JetEngineClass();
//使用JetEngineClass对象的CompactDatabase方法压缩修复数据库
jt.CompactDatabase(DBPath2, temp2);
//拷贝临时数据库到目标数据库(覆盖)
File.Copy(temp, DBPath, true);
//最后删除临时数据库
File.Delete(temp);
}
#endregion

#region 备份Access数据库
/// <summary>
/// 备份Access数据库
/// </summary>
/// <param name="srcPath">要备份的数据库绝对路径</param>
/// <param name="aimPath">备份到的数据库绝对路径</param>
/// <returns></returns>
public static void Backup(string srcPath,string aimPath)
{

if (!File.Exists(srcPath))
{
throw new Exception("源数据库不存在,无法备份");
}
try
{
File.Copy(srcPath,aimPath,true);
}
catch(IOException iXP)

  {
throw new Exception(ixp.ToString());
}

}

#endregion

#region 还原Access数据库
/// <summary>
/// 还原Access数据库
/// </summary>
/// <param name="bakPath">备份的数据库绝对路径</param>
/// <param name="dbPath">要还原的数据库绝对路径</param>
public static void RecoverAccess(string bakPath,string dbPath)
{
if (!File.Exists(bakPath))
{
throw new Exception("备份数据库不存在,无法还原");
}
try
{
File.Copy(bakPath, dbPath, true);
}
catch (IOException ixp)
{
throw new Exception(ixp.ToString());
}
}
#endregion
}
}
===============================================================================================

请添加引用Microsoft ADO Ext. 2.7 for DDL and Securit...

 

using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using ADOX;

/// <summary>
/// file : create access db
/// autor: Wang Yahui
/// createtime : 2008-03-17
/// </summary>
public class CreateDB
{

    /// <summary>
    /// create access db
    /// </summary>
    /// <param name="Path">db file path</param>
 public CreateDB(string Path)
 {
        //为了方便测试，数据库名字采用比较随机的名字，以防止添加不成功时还需要重新启动IIS来删除数据库。
        string dbName = Path +DateTime.Now.Millisecond.ToString()+".mdb";

        ADOX.CatalogClass cat = new ADOX.CatalogClass();
        cat.Create("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + dbName + ";");

        ///创建StudentPaper表
        ADOX.TableClass tbl = new ADOX.TableClass();
        tbl.ParentCatalog = cat;
        tbl.Name = Constant.StudentPaper;

        ///添加StudentID字段
        ADOX.ColumnClass studentID = new ADOX.ColumnClass();
        studentID.ParentCatalog = cat;
        studentID.Type = ADOX.DataTypeEnum.adWChar; // 必须先设置字段类型       
        studentID.Name = "StudentID";
        studentID.Properties["Jet OLEDB:Allow Zero Length"].Value = false;//是否可以为空
        //col.Properties["AutoIncrement"].Value= true;//增加一个自动增长的字段
        tbl.Columns.Append(studentID, ADOX.DataTypeEnum.adWChar, 20);

        ///增加PaperType字段
        ADOX.ColumnClass paperType = new ADOX.ColumnClass();
        paperType.ParentCatalog = cat;
        paperType.Type = ADOX.DataTypeEnum.adWChar;
        paperType.Name = "PaperType";
        paperType.Properties["Jet OLEDB:Allow Zero Length"].Value = false;
        tbl.Columns.Append(paperType, ADOX.DataTypeEnum.adWChar, 1);

        //增加oMRAnswer字段
        ADOX.ColumnClass oMRAnswer = new ADOX.ColumnClass();
        oMRAnswer.ParentCatalog = cat;
        oMRAnswer.Type = ADOX.DataTypeEnum.adWChar;
        oMRAnswer.Name = "OMRAnswer";
        oMRAnswer.Properties["Jet OLEDB:Allow Zero Length"].Value = false;
        tbl.Columns.Append(oMRAnswer, ADOX.DataTypeEnum.adWChar, 255);

        //增加oMRAnswer字段
        ADOX.ColumnClass imageStudentID = new ADOX.ColumnClass();
        imageStudentID.ParentCatalog = cat;
        imageStudentID.Type = ADOX.DataTypeEnum.adWChar;
        imageStudentID.Name = "ImageStudentID";
        imageStudentID.Properties["Jet OLEDB:Allow Zero Length"].Value = false;
        tbl.Columns.Append(imageStudentID, ADOX.DataTypeEnum.adWChar, 6);

        ///设置主键
        tbl.Keys.Append("PrimaryKey", ADOX.KeyTypeEnum.adKeyPrimary, "StudentID", "", "");

        cat.Tables.Append(tbl);

        tbl = null;
        cat = null;

    } // end function CreateDB()  
}

 

如果你创建数据库表时报“类型无效”的错误，请参考下表，对照一下字段的数据类型是否一致：

常数值Jet 3.51Jet 4.0SQL 7.0adBinary128yesyesyesadBoolean11yesyesyesadChar129yes否yesadCurrency6yesyesyesadDate7yesyes否adDouble5yesyesyesadGUID72yesyesyesadInteger3yesyesyesadLongVarBinary205yesyesyesadLongVarChar201yes否yesadLongVarWChar203否yesyesadNumeric131否是的 （带有信息) *是的 （带有信息) *adSingle4yesyesyesadSmallInt2yesyesyesadUnsignedTinyInt17yesyesyesadVarBinary204yesyesyesadVarChar200yes否yesadVarWChar202否yesyesadWChar130否yesyesadDBTimeStamp135否否yes