IDbCommand.Parameters 属性

定义

命名空间:

System.Data

程序集:

System.Data.Common.dll

获取 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

属性值

IDataParameterCollection

SQL 语句或存储过程的参数。

示例

以下示例创建派生类 的实例， SqlCommand并显示其参数。 在此示例中，应用程序传递一个 、一个 SqlConnection作为 Transact-SQL SELECT 语句的 SqlParameter 查询字符串和一个 对象数组。

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

另请参阅

• IDataParameter