Asp.net mvc 4 将模型tproperty表达式传递给部分

我在这样的表单上有很多“是/否”单选按钮：

<div class="form-row">                                   
    @Html.DisplayNameFor(m => m.OptIn48Hours)<br />

    <label>@Html.RadioButtonFor(m => m.OptIn48Hours, "true") Yes</label>
    <label>@Html.RadioButtonFor(m => m.OptIn48Hours, "false") No</label>
    @Html.ValidationMessageFor(m => m.OptIn48Hours)
</div>

---

但这只是将值传递给分部，而不是传递给

m.OptIn48Hours

是什么。如何传入

m.optin48小时

我建议使用html助手扩展方法来生成控件

public static MvcHtmlString YesNoButtonsFor<TModel>(this HtmlHelper<TModel> helper, Expression<Func<TModel, bool>> expression)
{
    ModelMetadata metaData = ModelMetadata.FromLambdaExpression(expression, helper.ViewData);
    string name = ExpressionHelper.GetExpressionText(expression);
    // ensure we use unique `id` attributes if being used in a collection
    string id = HtmlHelper.GenerateIdFromName(name) ?? metaData.PropertyName;
    StringBuilder html = new StringBuilder();
    TagBuilder label = new TagBuilder("div");
    label.InnerHtml = helper.DisplayNameFor(expression).ToString();
    html.Append(label);
    string yesId = string.Format("{0}_Yes", id);
    html.Append(helper.RadioButtonFor(expression, true, new { id = yesId }));
    html.Append(helper.Label(yesId, "Yes"));
    string noId = string.Format("{0}_No", metaData.PropertyName);
    html.Append(helper.RadioButtonFor(expression, false, new { id = noId }));
    html.Append(helper.Label(noId, "No"));
    html.Append(helper.ValidationMessageFor(expression));
    TagBuilder div = new TagBuilder("div");
    div.AddCssClass("form-row");
    div.InnerHtml = html.ToString();
    return new MvcHtmlString(div.ToString());
}

---

您最好为此创建一个自定义html帮助程序-比如说

@html.YesNoButtonsFor（m=>m.yourProperty）

好主意，我会考虑一下，谢谢，这是一种享受-我的助手将简单得多，但我喜欢所有额外的功能，这是一个增强，允许在集合中使用

@Html.Partial("_RadioYesNo", Model.OptIn48Hours)

public static MvcHtmlString YesNoButtonsFor<TModel>(this HtmlHelper<TModel> helper, Expression<Func<TModel, bool>> expression)
{
    ModelMetadata metaData = ModelMetadata.FromLambdaExpression(expression, helper.ViewData);
    string name = ExpressionHelper.GetExpressionText(expression);
    // ensure we use unique `id` attributes if being used in a collection
    string id = HtmlHelper.GenerateIdFromName(name) ?? metaData.PropertyName;
    StringBuilder html = new StringBuilder();
    TagBuilder label = new TagBuilder("div");
    label.InnerHtml = helper.DisplayNameFor(expression).ToString();
    html.Append(label);
    string yesId = string.Format("{0}_Yes", id);
    html.Append(helper.RadioButtonFor(expression, true, new { id = yesId }));
    html.Append(helper.Label(yesId, "Yes"));
    string noId = string.Format("{0}_No", metaData.PropertyName);
    html.Append(helper.RadioButtonFor(expression, false, new { id = noId }));
    html.Append(helper.Label(noId, "No"));
    html.Append(helper.ValidationMessageFor(expression));
    TagBuilder div = new TagBuilder("div");
    div.AddCssClass("form-row");
    div.InnerHtml = html.ToString();
    return new MvcHtmlString(div.ToString());
}

@Html.YesNoButtonsFor(m => m.yourBooleanProperty)