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asp.net实现数据库备份还原功能

2014-08-05 12:28 543 查看
-- 备份数据库

backup database db_CSManage to disk='c:\backup.bak'

-- 还原数据库,必须先备份该数据库的日志文件到原先的备份文件中

backup log db_CSManage to disk='c:\backup.bak'

restore database db_CSManage from disk='c:\backup.bak'

其中db_CSManage是数据库名称,disk后的路径即是备份文件存储的路径。
知道了SQL语句,那么在.NET代码中就容易多了,备份的.NET代码如下:

try

{

if (txtPath.Text != "" && txtName122.Text != "")

{

getSqlConnection geCon = new getSqlConnection();

SqlConnection con = geCon.GetCon();

string strBacl = "backup database db_CSManage to disk='" + txtPath.Text.Trim() + "\\" + txtName.Text.Trim() + ".bak'";

SqlCommand Cmd = new SqlCommand(strBacl, con);

if (Cmd.ExecuteNonQuery() != 0)

{

MessageBox.Show("数据备份成功!", "提示框", MessageBoxButtons.OK, MessageBoxIcon.Information);

this.Close();

}

else

{

MessageBox.Show("数据备份失败!", "提示框", MessageBoxButtons.OK, MessageBoxIcon.Information);

}

}

else

{

MessageBox.Show("请填写备份的正确位置及文件名!", "提示框", MessageBoxButtons.OK, MessageBoxIcon.Information);

}// end

}

catch (Exception ee)

{

MessageBox.Show(ee.Message.ToString());

}

以下是还原数据库的代码,在示例中发现开头得先删除与该数据库相关的进程,然后在还原之前得先把数据库日志备份到开始的备份文件中,然后才还原备份文件,要不然会出错的,代码如下:

if (textPaht.Text != "")

{

getSqlConnection geCon = new getSqlConnection();

SqlConnection con = geCon.GetCon();

if (con.State == ConnectionState.Open)

{

con.Close();

}

string DateStr = "Data Source=niunan\\sqlexpress;Database=master;User id=sa;PWD=123456";

SqlConnection conn = new SqlConnection(DateStr);

conn.Open();

//-------------------杀掉所有连接 db_CSManage 数据库的进程--------------

string strSQL = "select spid from master..sysprocesses where dbid=db_id( 'db_CSManage') ";

SqlDataAdapter Da = new SqlDataAdapter(strSQL, conn);

DataTable spidTable = new DataTable();

Da.Fill(spidTable);

SqlCommand Cmd = new SqlCommand();

Cmd.CommandType = CommandType.Text;

Cmd.Connection = conn;

for (int iRow = 0; iRow <= spidTable.Rows.Count - 1; iRow++)

{

Cmd.CommandText = "kill " + spidTable.Rows[iRow][0].ToString(); //强行关闭用户进程

Cmd.ExecuteNonQuery();

}

conn.Close();

conn.Dispose();

//--------------------------------------------------------------------

SqlConnection sqlcon = new SqlConnection(DateStr);

sqlcon.Open();

string sql = "backup log db_CSManage to disk='" + textPaht.Text.Trim() + "' restore database db_CSManage from disk='" + textPaht.Text.Trim() + "'";

SqlCommand sqlCmd = new SqlCommand(sql, sqlcon);

sqlCmd.ExecuteNonQuery();

sqlCmd.Dispose();

sqlcon.Close();

sqlcon.Dispose();

MessageBox.Show("数据还原成功!", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);

MessageBox.Show("为了必免数据丢失,在数据库还原后将关闭整个系统。");

Application.Exit();

}

else

{

MessageBox.Show("请选择备份文件!", "提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);

}
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