通过

IExpression.IsEmpty 属性

Indicates whether the evaluated expression is the empty cell value.

命名空间：  Microsoft.ReportingServices.RdlObjectModel
程序集：  Microsoft.ReportingServices.Designer.Controls（在 Microsoft.ReportingServices.Designer.Controls.dll 中）

语法

声明
ReadOnly Property IsEmpty As Boolean
    Get
用法
Dim instance As IExpression
Dim value As Boolean

value = instance.IsEmpty

bool IsEmpty { get; }

property bool IsEmpty {
    bool get ();
}

abstract IsEmpty : bool

function get IsEmpty () : boolean

属性值

类型：System.Boolean
A Boolean value.