ASP.NET备份恢复SqlServer数据库

可以采用 SQLDMO 的Backup，Restore 实现，以下介绍的是使用Sql的Backup，Restore来实现:

转自：http://www.enet.com.cn/article/2007/1112/A20071112906795.shtml

备份SqlServer数据库
核心技术：
using System.Data.SqlClient;
using System.IO;
string SqlStr1 = "Server=(local);DataBase=master;Uid=sa;Pwd=";
string SqlStr2 = "Exec sp_helpdb";
string SqlStr1 = "Server=(local);database='" + this.DropDownList1.SelectedValue + "';Uid=sa;Pwd=";
string SqlStr2 = "backup database " + this.DropDownList1.SelectedValue + " to disk='" + this.TextBox1.Text.Trim() + ".bak'";

1.前台

<table>
<tr>
<td style="width: 100px"><span style="font-size: 9pt">操 作 数 据 库</span></td>
<td><asp:DropDownList ID="DropDownList1" runat="server" Font-Size="9pt" Width="124px"></asp:DropDownList></td>
<td style="width: 100px"></td>
</tr>
<tr>
<td style="width: 100px"><span style="font-size: 9pt">备份名称和位置</span></td>
<td style="width: 100px"><asp:TextBox ID="TextBox1" runat="server" Font-Size="9pt" Width="117px"></asp:TextBox></td>
<td style="width: 100px"><span style="font-size: 9pt; color: #ff3300">（如D:\beifen）</span></td>
</tr>
<tr>
<td colspan="3"><asp:Button ID="Button1" runat="server" Font-Size="9pt" OnClick="Button1_Click" Text="备份数据库" /></td>
</tr>
</table>

2.后台

using System.Data.SqlClient;
using System.IO;

public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
string SqlStr1 = "Server=(local);DataBase=master;Uid=sa;Pwd=";
string SqlStr2 = "Exec sp_helpdb";
SqlConnection con = new SqlConnection(SqlStr1);
con.Open();
SqlCommand com = new SqlCommand(SqlStr2, con);
SqlDataReader dr = com.ExecuteReader();
this.DropDownList1.DataSource = dr;
this.DropDownList1.DataTextField = "name";
this.DropDownList1.DataBind();
dr.Close();
con.Close();
}
}
protected void Button1_Click(object sender, EventArgs e)
{
string SqlStr1 = "Server=(local);database='" + this.DropDownList1.SelectedValue + "';Uid=sa;Pwd=";
string SqlStr2 = "backup database " + this.DropDownList1.SelectedValue + " to disk='" + this.TextBox1.Text.Trim() + ".bak'";
SqlConnection con = new SqlConnection(SqlStr1);
con.Open();
try
{
if (File.Exists(this.TextBox1.Text.Trim()))
{
Response.Write("<script language=javascript>alert('此文件已存在，请从新输入！');location='Default.aspx'</script>");
return;
}
SqlCommand com = new SqlCommand(SqlStr2, con);
com.ExecuteNonQuery();
Response.Write("<script language=javascript>alert('备份数据成功！');location='Default.aspx'</script>");
}
catch (Exception error)
{
Response.Write(error.Message);
Response.Write("<script language=javascript>alert('备份数据失败！')</script>");
}
finally
{
con.Close();
}
}
}



还原SqlServer
核心技术:
string SqlStr1 = "Server=(local);database='" + this.DropDownList1.SelectedValue + "';Uid=sa;Pwd=";
string SqlStr2 = "use master restore database " + dbname + " from disk='" + path + "'";

1.前台
<table>
<tr>
<td style="width: 100px; height: 21px"><span style="font-size: 9pt">操 作 数 据 库</span></td>
<td><asp:DropDownList ID="DropDownList1" runat="server" Font-Size="9pt" Width="124px"></asp:DropDownList></td>
<td style="width: 100px; height: 21px"></td>
</tr>
<tr>
<td style="width: 100px"><span style="font-size: 9pt">操 作 数 据 库</span></td>
<td style="width: 100px"><asp:FileUpload ID="FileUpload1" runat="server" Font-Size="9pt" Width="190px" /></td>
<td style="width: 100px">
</td>
</tr>
<tr>
<td colspan="3"><asp:Button ID="Button1" runat="server" Font-Size="9pt" OnClick="Button1_Click" Text="还原数据库" /></td>
</tr>
</table>
2.后台

using System.Data.SqlClient;
using System.IO;

public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
string SqlStr1 = "Server=(local);DataBase=master;Uid=sa;Pwd=";
string SqlStr2 = "Exec sp_helpdb";
SqlConnection con = new SqlConnection(SqlStr1);
con.Open();
SqlCommand com = new SqlCommand(SqlStr2, con);
SqlDataReader dr = com.ExecuteReader();
this.DropDownList1.DataSource = dr;
this.DropDownList1.DataTextField = "name";
this.DropDownList1.DataBind();
dr.Close();
con.Close();
}
}

protected void Button1_Click(object sender, EventArgs e)
{
string path = this.FileUpload1.PostedFile.FileName; //获得备份路径及数据库名称
string dbname = this.DropDownList1.SelectedValue;
string SqlStr1 = "Server=(local);database='" + this.DropDownList1.SelectedValue + "';Uid=sa;Pwd=";
string SqlStr2 = "use master restore database " + dbname + " from disk='" + path + "'";
SqlConnection con = new SqlConnection(SqlStr1);
con.Open();
try
{
SqlCommand com = new SqlCommand(SqlStr2, con);
com.ExecuteNonQuery();
Response.Write("<script language=javascript>alert('还原数据成功！');location='Default.aspx'</script>");
}
catch (Exception error)
{
Response.Write(error.Message);
Response.Write("<script language=javascript>alert('还原数据失败！')</script>");
}
finally
{
con.Close();
}
}
}

以下内容转自：http://www.cnblogs.com/windthunder/archive/2009/09/25/1573981.html
在用Asp.net对备份的数据库文件进行还原的时候，有时候会出现下面的错误异常：
[因为数据库正在使用，所以未能获得对数据库的排它访问权。 RESTORE DATABASE 操作异常终止。已将数据库上下文改为 'master'。]
[SQL代码]

-- 还原数据库时数据库正在使用导致数据库无会还原，此存储过存在msater数据库下创建。exec killspid 'dbname' 结束此数据库的进程，这样才能还原数据库
create   proc  killspid ( @dbname   varchar ( 20 ))     
as      
begin      
declare   @sql     nvarchar ( 500 )     
declare   @spid    int      
set   @sql = ' declare getspid cursor for select spid from sysprocesses where dbid=db_id( ''' + @dbname + ''' ) '      
exec  ( @sql )     
open  getspid     
fetch   next   from  getspid  into   @spid      
while   @@fetch_status   <>   - 1      
begin      
exec ( ' kill  ' + @spid )     
fetch   next   from  getspid  into   @spid      
end      
close  getspid     
deallocate  getspid     
end  

[C#代码]

     ///   < summary >
     ///  恢复数据库，可选择是否可以强制还原（即在其他人在用的时候，依然可以还原）
     ///   </ summary >
     ///   < param name = "databasename" > 待还原的数据库名称 </ param >
     ///   < param name = "databasefile" > 带还原的备份文件的完全路径 </ param >
     ///   < param name = "errormessage" > 恢复数据库失败的信息 </ param >
     ///   < param name = "forceRestore" > 是否强制还原（恢复），如果为TRUE，则exec killspid  ' 数据库名 '  结束此数据库的进程，这样才能还原数据库 </ param >
     ///   < returns ></ returns >
     public  bool RestoreDataBase(string databasename, string databasefile, ref string errormessage,bool forceRestore)
    {
        bool success  =  true;
        string path  =  databasefile;
        string dbname  =  databasename;

        string restoreSql  =  " use  master;";

         if  (forceRestore) // 如果强制回复
            restoreSql  +=  string.Format(" use  master  exec  killspid  ' {0} ' ;",databasename);

        restoreSql  +=  " restore   database   @dbname   from   disk   =   @path ;";

        SqlCommand myCommand  =  new SqlCommand(restoreSql, conn);

        myCommand.Parameters. Add (" @dbname ", SqlDbType. Char );
        myCommand.Parameters [ "@dbname" ] .Value  =  dbname;
        myCommand.Parameters. Add (" @path ", SqlDbType. Char );
        myCommand.Parameters [ "@path" ] .Value  =  path;

        try
        {
            myCommand.Connection. Open ();
            myCommand.ExecuteNonQuery();
        }
        catch (Exception ex)
        {
            errormessage  =  ex.Message;
            success  =  false;
        }
        finally
        {
            myCommand.Connection. Close ();
        }

         return  success;
    }