通过

AllowBlank 属性

Indicates whether the value of the parameter can be blank.

命名空间：  Microsoft.ReportingServices.ReportRendering
程序集：  Microsoft.ReportingServices.ProcessingCore（在 Microsoft.ReportingServices.ProcessingCore.dll 中）

语法

声明
Public ReadOnly Property AllowBlank As Boolean
    Get
用法
Dim instance As ReportParameter
Dim value As Boolean

value = instance.AllowBlank

public bool AllowBlank { get; }

public:
property bool AllowBlank {
    bool get ();
}

member AllowBlank : bool

function get AllowBlank () : boolean

属性值

类型：System. . :: . .Boolean
A Boolean that indicates whether the parameter can have a blank value. A value of true indicates a blank value is acceptable. A value of false indicates that it cannot have a blank value.