IDbCommand.Parameters 屬性

定義

命名空間:

System.Data

組件:

System.Data.Common.dll

取得 IDataParameterCollection。

public:
 property System::Data::IDataParameterCollection ^ Parameters { System::Data::IDataParameterCollection ^ get(); };

public System.Data.IDataParameterCollection Parameters { get; }

member this.Parameters : System.Data.IDataParameterCollection

Public ReadOnly Property Parameters As IDataParameterCollection

屬性值

IDataParameterCollection

SQL 陳述式或預存程序的參數。

範例

下列範例會建立衍生類別 SqlCommand的實例，並顯示其參數。 在此範例中，應用程式會傳遞、 SqlConnection是 Transact-SQL SELECT 語句的查詢字串，以及 物件的陣列 SqlParameter 。

public void CreateSqlCommand(SqlConnection myConnection,
    string queryString, SqlParameter[] paramArray)
{
    SqlCommand command = new SqlCommand(queryString, myConnection);
    command.CommandText =
        "SELECT CustomerID, CompanyName FROM Customers "
        + "WHERE Country = @Country AND City = @City";
    command.Parameters.AddRange(paramArray);

    string message = "";
    for (int i = 0; i < command.Parameters.Count; i++)
    {
        message += command.Parameters[i].ToString() + "\n";
    }
    Console.WriteLine(message);
}

Public Sub CreateSqlCommand(ByVal connection As SqlConnection, _
ByVal queryString As String, ByVal params() As SqlParameter)

    Dim command As New SqlCommand(queryString, connection)
    command.CommandText = _
       "SELECT CustomerID, CompanyName FROM Customers " _
       & "WHERE Country = @Country AND City = @City"
    command.UpdatedRowSource = UpdateRowSource.Both
    command.Parameters.AddRange(params)

    Dim message As String = ""
    For i As Integer = 0 To command.Parameters.Count - 1
        message += command.Parameters(i).ToString() & ControlChars.Cr
    Next 

    Console.WriteLine(message)
End Sub

另請參閱

• IDataParameter