asp.net-mvc – MVC3 TextBoxFor与EditorFor – 每个问题

DisplayFormat仅供MVC用于razor的任何Display扩展方法. (比如DisplayFor)不幸的是,做你想做的事你就得写一些“手工”代码……这是一个让你前进的例子.它基本上重现了TextBoxFor代码,但做出了一些很可能对生产不利的假设.请注意下面的displayText分配,这是我们真正关心您在DisplayFormat中设置的DisplayFormatString的位置.

在您的视图中调用它@ Html.TextEditorFor(m => m.Value)

public static class CustomEditorFor
{
    public static IHtmlString TextEditorFor<TModel,TProperty>(this HtmlHelper<TModel> helper,Expression<Func<TModel,TProperty>> expression,object htmlAttributes)
    {
        return TextEditorFor(helper,expression,HtmlHelper.AnonymousObjectToHtmlAttributes(htmlAttributes));
    }

    public static IHtmlString TextEditorFor<TModel,IDictionary<string,object> htmlAttributes)
    {
        ModelMetadata metadata = ModelMetadata.FromLambdaExpression(expression,helper.ViewData);
        object value = metadata.Model;
        string displayText = string.Format(metadata.DisplayFormatString,value);

        string fullName = helper.ViewContext.ViewData.TemplateInfo.GetFullHtmlFieldName(ExpressionHelper.GetExpressionText(expression));

        TagBuilder tagBuilder = new TagBuilder("input");
        tagBuilder.MergeAttributes(htmlAttributes);
        tagBuilder.MergeAttribute("type","text");
        tagBuilder.MergeAttribute("name",fullName,true);

        tagBuilder.MergeAttribute("value",displayText);
        tagBuilder.GenerateId(fullName);
        ModelState modelState;
        if (helper.ViewData.ModelState.TryGetValue(fullName,out modelState))
        {
            if (modelState.Errors.Count > 0)
            {
                tagBuilder.AddCssClass(HtmlHelper.ValidationInputCssClassName);
            }
        }

        tagBuilder.MergeAttributes(helper.GetUnobtrusiveValidationAttributes(ExpressionHelper.GetExpressionText(expression),metadata));

        return new HtmlString(tagBuilder.ToString(TagRenderMode.SelfClosing));

    }
}