具有绑定到单个标志枚举的多个值的 CheckBoxList
我有一个 FormView（绑定到 ObjectDataSource），其中包含一个 CheckBoxList，我想将其绑定到基础对象的单个属性，该属性是一个应用了 FlagsAttribute 的枚举。 绑定到 SelectedValue 属性始终只提供列表中第一个选定的值作为属性的值。 任何人都知道如何解决这个问题，而不覆盖插入或更新方法并手动获取复选框列表的值并将其填充到数据源的参数中？ 下面是我想要做的示例代码...
<asp:FormView runat="server" ID="MyFormView" DataSourceID="MyDataSource">
<InsertItemTempate>
<asp:CheckBoxList runat="server" ID="MyCbl" SelectedValue='<%# Bind("MyProperty") %>'>
<asp:ListItem Text="Choice 1" Value="ChoiceOne"></asp:ListItem>
<asp:ListItem Text="Choice 2" Value="ChoiceTwo"></asp:ListItem>
</asp:CheckBoxList>
</InsertItemTemplate>
</asp:FormView>
<asp:ObjectDataSource runat="server" ID="MyDataSource" TypeName="MyClass" ...></asp:ObjectDataSource>
在幕后，我的对象是这样声明的...
public class MyClass
{
public MyEnum MyProperty { get; set; }
}
[Flags()]
public Enum MyEnum
{
ChoiceOne = 1,
ChoiceTwo = 2
}
I have a FormView (bound to an ObjectDataSource) that contains a CheckBoxList that I'd like to bind to a single property of the underlying object that is an Enum with the FlagsAttribute applied to it. Binding to the SelectedValue property always gives me just the FIRST selected value from the list as the property's value. Anyone know how to get around this without overriding the Inserting or Updating methods and manually getting the values of the checkbox list and stuffing it into the parameters of the datasource? Sample code below of what I'm trying to do...
<asp:FormView runat="server" ID="MyFormView" DataSourceID="MyDataSource">
<InsertItemTempate>
<asp:CheckBoxList runat="server" ID="MyCbl" SelectedValue='<%# Bind("MyProperty") %>'>
<asp:ListItem Text="Choice 1" Value="ChoiceOne"></asp:ListItem>
<asp:ListItem Text="Choice 2" Value="ChoiceTwo"></asp:ListItem>
</asp:CheckBoxList>
</InsertItemTemplate>
</asp:FormView>
<asp:ObjectDataSource runat="server" ID="MyDataSource" TypeName="MyClass" ...></asp:ObjectDataSource>
behind the scenes, my object is declared like this...
public class MyClass
{
public MyEnum MyProperty { get; set; }
}
[Flags()]
public Enum MyEnum
{
ChoiceOne = 1,
ChoiceTwo = 2
}
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您必须迭代
Items集合并从那里构建枚举值。在 Google 上搜索
FlaggedEnumTypeConverter也应该会有所帮助。You will have to iterate through the
Itemscollections and build up the enum values from there.A search on Google for
FlaggedEnumTypeConvertershould also be helpful.