SQL代码：
-- 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：
C#代码-备份：
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：
C#代码-还原：
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);
}