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IDataReader.FieldCount 属性

Gets the number of fields in the data reader.

命名空间：  Microsoft.ReportingServices.DataProcessing
程序集：   Microsoft.ReportingServices.Interfaces（在 Microsoft.ReportingServices.Interfaces.dll 中）
  Microsoft.ReportingServices.SharePoint.UI.WebParts（在 Microsoft.ReportingServices.SharePoint.UI.WebParts.dll 中）

语法

声明
ReadOnly Property FieldCount As Integer
    Get
用法
Dim instance As IDataReader
Dim value As Integer

value = instance.FieldCount

int FieldCount { get; }

property int FieldCount {
    int get ();
}

abstract FieldCount : int

function get FieldCount () : int

属性值

类型：System.Int32
When not positioned in a valid recordset, 0; otherwise the number of columns in the current record. The default value is -1.

注释

After executing a query that does not return rows, FieldCount returns -1.