通过

ReportParameter.Nullable 属性

Indicates the value for this parameter is allowed to be Null.

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
Public Property Nullable As Boolean
    Get
    Set
用法
Dim instance As ReportParameter
Dim value As Boolean

value = instance.Nullable

instance.Nullable = value

public bool Nullable { get; set; }

public:
property bool Nullable {
    bool get ();
    void set (bool value);
}

member Nullable : bool with get, set

function get Nullable () : boolean
function set Nullable (value : boolean)

属性值

类型：System.Boolean
A Boolean value.