Question

在尝试解决[这个][1]问题之后，我认为问题的核心在于以下内容：

When you use the Html.RadioButton() html helper with an Enum as value field, you can only choose your option once. AFter reposting the page, the helpers will ignore the value set in the call and set all radio buttons to the same value, being the value you selected the previous post back. Am I doing something wrong?

示例（观察按钮的价值）

<fieldset>
    <legend>Test</legend>                            
    <div>
        <label for="SearchBag.EffectIndicatorAny" id="EffectIndicatorAnyLabel">
            Any
        </label>                
        <%=Html.RadioButton("SearchBag.EffectIndicator", "Any" , ViewData.Model.SearchBag.EffectIndicatorIsAny, new { @id = "SearchBag.EffectIndicatorAny" })%>
    </div>
    <div>
        <label for="SearchBag.EffectIndicatorSolid" id="EffectIndicatorSolidLabel">
            Solid
        </label>                
        <%=Html.RadioButton("SearchBag.EffectIndicator", "Solid", ViewData.Model.SearchBag.EffectIndicatorIsSolid, new { @id = "SearchBag.EffectIndicatorSolid" })%>
    </div>
    <div>
        <label for="SearchBag.EffectIndicatorEffect" id="EffectIndicatorEffectLabel">
            Effect
        </label>                
        <%=Html.RadioButton("SearchBag.EffectIndicator", "Effect", ViewData.Model.SearchBag.EffectIndicatorIsEffect, new { @id = "SearchBag.EffectIndicatorEffect" })%>
    </div>
</fieldset>

会生成

<fieldset>
    <legend>Effect</legend>                            
    <div class="horizontalRadio">
        <label for="SearchBag.EffectIndicatorAny" id="EffectIndicatorAnyLabel">
            Any                                      
        </label>                
        <input checked="checked" id="SearchBag.EffectIndicatorAny" name="SearchBag.EffectIndicator" type="radio" value="Any" />
    </div>
    <div class="horizontalRadio">
        <label for="SearchBag.EffectIndicatorSolid" id="EffectIndicatorSolidLabel">
            Solid
        </label>                
        <input id="SearchBag.EffectIndicatorSolid" name="SearchBag.EffectIndicator" type="radio" value="Solid" />
    </div>
    <div class="horizontalRadio">
        <label for="SearchBag.EffectIndicatorEffect" id="EffectIndicatorEffectLabel">
            Effect
        </label>                
        <input id="SearchBag.EffectIndicatorEffect" name="SearchBag.EffectIndicator" type="radio" value="Effect" />
    </div>
</fieldset>

而且将产生第二次：

<fieldset>
    <legend>Effect</legend>                            
    <div class="horizontalRadio">
        <label for="SearchBag.EffectIndicatorAny" id="EffectIndicatorAnyLabel">
            Any                                      
        </label>                
        <input id="SearchBag.EffectIndicatorAny" name="SearchBag.EffectIndicator" type="radio" value="Solid" />
    </div>
    <div class="horizontalRadio">
        <label for="SearchBag.EffectIndicatorSolid" id="EffectIndicatorSolidLabel">
            Solid
        </label>                
        <input checked="checked" id="SearchBag.EffectIndicatorSolid" name="SearchBag.EffectIndicator" type="radio" value="Solid" />
    </div>
    <div class="horizontalRadio">
        <label for="SearchBag.EffectIndicatorEffect" id="EffectIndicatorEffectLabel">
            Effect
        </label>                
        <input id="SearchBag.EffectIndicatorEffect" name="SearchBag.EffectIndicator" type="radio" value="Solid" />
    </div>
</fieldset>

Answer 1

这是由于ASP.NET MVC Beta代码中的漏洞。我在asp.net MVC论坛上写了一个完整的问题说明。请参阅此链接。

Answer 2

In case anybody cares here is a real quick and dirty work around in anticipation for the next update of the framework. It only regexreplaces the value with your value. It s not unit tested, not guaranteed not whatever.

Put it in your HtmlHelper class library or wherever you put HtmlHelper extentions. add the following usings:

System.Text.RegularExpressions;

System.Web.Mvc.Html; 的中文翻译为：系统。网络。Mvc。Html;

/*ToDo: remove when patched in framework*/
public static string MonkeyPatchedRadio(this HtmlHelper htmlHelper, string name, object value, bool isChecked, object htmlAttributes){
    string monkeyString = htmlHelper.RadioButton(name, value, isChecked, htmlAttributes);
    monkeyString = Regex.Replace(monkeyString, "(?<=value=").*(?=".*)", value.ToString());            
    return monkeyString;
}

I know it can be done better and whatnot, but I really hope it will be fixed soon anyway. If you feel like making it better, it s community wiki, so go ahead

Answer 3

有一件事需要检查。您是否使用更新的模型来呈现您的视图？即，第二次显示时，是否将更新的相同模型数据从发布传递到视图中？

友情链接