如何以声明方式将 asp:listitem 设置为枚举值？

Question

我有一个 asp:RadioButtonList 并希望以声明方式将该值绑定到枚举。我尝试使用以下类型语法：

value = <%# ((int)MyEnum.Value).ToString() %>"

我收到错误列表项不支持数据绑定。有什么想法吗？

Answer 1

本质上，你无法完全按照自己的意愿去做。这是因为 Asp:Listitem 不包含数据绑定事件。然而，RadioButtonList 本身确实支持这一点。

所以这是我最接近你想要的。

这是 HTML

<asp:RadioButtonList runat="server" ID="rbl" DataSource='<%# EnumValues %>' DataValueField='Value'  DataTextField='Key' />

这是后面的代码

 Public Enum values As Integer
    first = 1
    second = 2
    third = 3
    fourth = 4
    fifth = 5

End Enum

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
    Page.DataBind()
End Sub

Public ReadOnly Property EnumValues() As System.Collections.Generic.Dictionary(Of String, String)
    Get


        Dim val As values

        Dim names As Array
        Dim values As Array


        Dim stuff As Dictionary(Of String, String) = New Dictionary(Of String, String)

        names = val.GetNames(val.GetType)
        values = val.GetValues(val.GetType)

        build the final results
        For i As Integer = 0 To names.Length - 1
            stuff.Add(names(i), values(i))
        Next

        Return stuff

    End Get
End Property

Answer 2

我迭代枚举而不是绑定。

Array itemValues = System.Enum.GetValues(typeof(Response));
Array itemNames = System.Enum.GetNames(typeof(Response));

for (int i = 0; i <= itemNames.Length - 1 ; i++) {
    ListItem item = new ListItem(itemNames(i), itemValues(i));
    radioButtonList1.Items.Add(item);
}