單項(xiàng)選擇題關(guān)于數(shù)據(jù)庫(kù)連接字符串代碼正確的是()

A.private static string DBConnectString ="server=.;database=FreshLiveDB;uid=sa;pwd=123;";
B.private static string DBConnectString ="server=.;database=FreshLiveDB;id=sa;pwd=123;";
C.private static string DBConnectString ="server=.;database=FreshLiveDB;id=sa;password=123;";
D.private static string DBConnectString ="server=.;database=FreshLiveDB;name=sa;pwd=123;";


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1.單項(xiàng)選擇題關(guān)于SqlCommand命令對(duì)象編寫正確的是()

A.SqlCommand cmm =new SqlCommand(sql語(yǔ)句,Connection對(duì)象);
B.SqlCommand cmm =new SqlCommand(Connection對(duì)象,sql語(yǔ)句);
C.SqlCommand cmm =new SqlCommand(sql語(yǔ)句);
D.SqlCommand cmm =new SqlCommand(Connection對(duì)象);

2.多項(xiàng)選擇題關(guān)于DataGridView控件的屬性描述正確的有()

A.Rows獲取總條數(shù)
B.DataSource 獲取數(shù)據(jù)源
C.Name 獲取控件的名稱
D.Columns 獲取總列的名稱

3.單項(xiàng)選擇題FormatException是()

A.算術(shù)異常
B.參數(shù)格式錯(cuò)誤異常
C.非法參數(shù)異常
D.數(shù)組下標(biāo)越界異常

4.單項(xiàng)選擇題try{//代碼塊1return 0;}catch(Exception e){//代碼塊2}finally{//代碼塊3}如果程序沒(méi)有捕捉到異常,上面代碼中的執(zhí)行結(jié)果是()

A.先執(zhí)行代碼塊3,后執(zhí)行return語(yǔ)句
B.程序報(bào)錯(cuò)
C.return0語(yǔ)句不執(zhí)行
D.先執(zhí)行return語(yǔ)句,后執(zhí)行代碼塊3

5.多項(xiàng)選擇題C#中,常見(jiàn)的異常處理結(jié)構(gòu)有()

A.try…finally
B.catch…finally
C.try…catch
D.try…catch…finally