PartialView动态BeginInform参数

我检查了mvc的源代码,并深入研究了system.web.mvc-->mvc-->html-->formExtensions,这样您就可以编写以下代码:

public static class FormHelpers
{
    public static MvcForm BeginFormImage(this HtmlHelper htmlHelper,  IDictionary<string, object> htmlAttributes)
    {
        string formAction = htmlHelper.ViewContext.HttpContext.Request.RawUrl;
        return FormHelper(htmlHelper, formAction, FormMethod.Post, htmlAttributes);
    }

    public static MvcForm FormHelper(this HtmlHelper htmlHelper, string formAction, FormMethod method, IDictionary<string, object> htmlAttributes)
    {
        TagBuilder tagBuilder = new TagBuilder("form");
        tagBuilder.MergeAttributes(htmlAttributes);
        // action is implicitly generated, so htmlAttributes take precedence.
        tagBuilder.MergeAttribute("action", formAction);
        tagBuilder.MergeAttribute("enctype", "multipart/form-data");
        // method is an explicit parameter, so it takes precedence over the htmlAttributes.
        tagBuilder.MergeAttribute("method", HtmlHelper.GetFormMethodString(method), true);
        htmlHelper.ViewContext.Writer.Write(tagBuilder.ToString(TagRenderMode.StartTag));
        MvcForm theForm = new MvcForm(htmlHelper.ViewContext);

        if (htmlHelper.ViewContext.ClientValidationEnabled)
        {
            htmlHelper.ViewContext.FormContext.FormId = tagBuilder.Attributes["id"];
        }

        return theForm;
    }
}

我不确定这正是你真正想要的,但我相信如果你改变这条线来满足你的需要,你可以得到它。 希望这有帮助。