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);}
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