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/// 對數據庫的備份和恢復操作，Sql語句實現

/// 實現備份或恢復的Sql語句

/// 該操作是否為備份操作，是為true否，為false

private void BakReductSql(string cmdText,bool isBak,string dbname)

{

string conString=DataBase.dbConnection.sqlNoDBNameConnect();

SqlConnection conn3 = new SqlConnection(conString);

SqlCommand cmdBakRst = new SqlCommand();

try

{

if(conn3.State==ConnectionState.Closed)

conn3.Open();

cmdBakRst.Connection = conn3;

cmdBakRst.CommandType = CommandType.Text;

if (!isBak) //如果是恢復操作

{

string setOffline = "Alter database "+dbname+" Set Offline With rollback immediate ";

string setOnline = " Alter database " + dbname + " Set Online With Rollback immediate";

cmdBakRst.CommandText = setOffline + cmdText + setOnline ;

}

else

{

cmdBakRst.CommandText = cmdText;

}

cmdBakRst.ExecuteNonQuery();

if (!isBak)

{

MessageBox.Show("數據成功恢復為所選文檔的狀態!", "系統消息");

}

else

{

MessageBox.Show("恭喜，你已經成功備份當前數據!", "系統消息");

}

}

catch (SqlException sexc)

{

MessageBox.Show("失敗，可能是對數據庫操作失敗，原因：" + sexc, "數據庫錯誤消息");

}

catch (Exception ex)

{

MessageBox.Show("對不起，操作失敗，可能原因：" + ex, "系統消息");

}

finally

{

cmdBakRst.Dispose();

conn3.Close();

}

}

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