由网友(童话，仅仅是童年的笑话の现实，仅仅是现在的实际)分享简介：我的模型中有一个带有 NULLABLE 布尔值的列.现在在我的视图(用于编辑)上，我想将其绑定到两个单选按钮:是 &否.如果值为空，则只需取消选中这两个单选按钮.我该怎么做呢?I have a column in my Model with a NULLABLE boolean value. Now on my Vi...

我的模型中有一个带有 NULLABLE 布尔值的列.现在在我的视图(用于编辑)上，我想将其绑定到两个单选按钮:是 &否.如果值为空，则只需取消选中这两个单选按钮.我该怎么做呢?

I have a column in my Model with a NULLABLE boolean value. Now on my View (for editing), I would like to bind that to two radiobuttons: Yes & No. If the value is null, then just have the two radiobutton un-checked. How would I go to do that?

谢谢.

推荐答案

一旦您选择了一个单选按钮，就没有办法取消选择它(作为用户).我建议，如果你真的需要一个三值结果，你应该有三个单选按钮——是的，不，不在乎.

Once you have selected a radio button, there's really no way to unselect it (as a user). I'd suggest that if you really need a three-valued result, that you have three radio buttons -- Yes, No, Don't care.

<%= Html.LabelFor( m => m.Foo ) %>
<%= Html.RadioButtonFor( m => m.Foo, "true" ) %> Yes
<%= Html.RadioButtonFor( m => m.Foo, "false" ) %> No
<%= Html.RadioButtonFor( m => m.Foo, string.Empty ) %> Don't Care
<%= Html.ValidationMessageFor( m => m.Foo ) %>