SqlCommand.Connection 屬性

SqlCommand.Connection 屬性

獲取或設置 SqlCommand 的此實例使用的 SqlConnection。

[Visual Basic]
Public Property Connection As SqlConnection
[C#]
public SqlConnection Connection {get; set;}
[C++]
public: __property SqlConnection* get_Connection();
public: __property void set_Connection(SqlConnection*);
[JScript]
public function get Connection() : SqlConnection;
public function set Connection(SqlConnection);

屬性值

與數據源的連接。默認值爲空引用（Visual Basic 中爲 Nothing）。

異常

異常類型	條件
InvalidOperationException	在事務進行過程中更改了 Connection 屬性。

備註

如果在事務進行過程中設置 Connection，而且 Transaction 屬性不爲空，則會生成 InvalidOperationException。如果 Transaction 屬性不爲空，而事務已經提交或回滾，則 Transaction 設置爲空。

示例

[Visual Basic, C#, C++] 下面的示例將創建一個 SqlCommand 並設置它的一些屬性。

[Visual Basic] 
Public Sub CreateMySqlCommand()
    Dim mySelectQuery As String = "SELECT * FROM Categories ORDER BY CategoryID"
    Dim myConnectString As String = "Persist Security Info=False;Integrated Security=SSPI;database=northwind;server=mySQLServer"
    Dim myCommand As New SqlCommand(mySelectQuery)
    myCommand.Connection = New SqlConnection(myConnectString)
    myCommand.CommandTimeout = 15
    myCommand.CommandType = CommandType.Text
End Sub 'CreateMySqlCommand

[C#] 
public void CreateMySqlCommand() 
 {
    string mySelectQuery = "SELECT * FROM Categories ORDER BY CategoryID";
    string myConnectString = "Persist Security Info=False;Integrated Security=SSPI;database=northwind;server=mySQLServer";
    SqlCommand myCommand = new SqlCommand(mySelectQuery);
    myCommand.Connection = new SqlConnection(myConnectString);
    myCommand.CommandTimeout = 15;
    myCommand.CommandType = CommandType.Text;
 }

[C++] 
public:
void CreateMySqlCommand() 
 {
    String* mySelectQuery = S"SELECT * FROM Categories ORDER BY CategoryID";
    String* myConnectString = S"Persist Security Info=False;Integrated Security=SSPI;database=northwind;server=mySQLServer";
    SqlCommand* myCommand = new SqlCommand(mySelectQuery);
    myCommand->Connection = new SqlConnection(myConnectString);
    myCommand->CommandTimeout = 15;
    myCommand->CommandType = CommandType::Text;
 }

[JScript] 沒有可用於 JScript 的示例。若要查看 Visual Basic、C# 或 C++ 示例，請單擊頁左上角的“語言篩選器”按鈕 。

要求

平臺: Windows 98, Windows NT 4.0, Windows ME, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 系列, .NET Framework 精簡版

請參見

SqlCommand 類 | SqlCommand 成員 | System.Data.SqlClient 命名空間 | CommandText | CommandTimeout | CommandType