Question

我尝试将默认值设置为Public Property的图片UserControl。我尝试用变量做到这一点，但我收到错误Cannot refer to an instance member of a class from within a shared method or shared member initializer without an explicit instance of the class.

Private Image_ As Image = My.Resources.MyImage
<Category("Appearance")> <DisplayName("Image")> <DefaultValue(Image_)> <Description("...")>
Public Property Image As Image
    Get
        Return NestedControl.Image
    End Get
    Set(ByVal value As Image)
        NestedControl.Image = value
    End Set
End Property

我还尝试设置默认值，例如<DefaultValue(GetType(Image), "My.Resources.MyImage")>，但当我重置为UserControl的属性时，它会变为＆＃34;无＆＃34; !!!

有什么想法吗？

Answer 1

虽然+---------------+-------------------------+ | id|Last30daysOccurrenceCount| +---------------+-------------------------+ |533ladk203ldpwk| 3| |516dlksw9823adp| 1| +---------------+-------------------------+不支持此功能，但您可以使用旧式重置 PropertyName和 ShouldSerialize PropertyName方法来实现相同的功能。

Defining Default Values with the ShouldSerialize and Reset Methods中记录了这一点。

System.ComponentModel.DefaultValueAttribute

将默认值设置为图像＆＃34;公共属性＆＃34;

1 个答案: