如何呈现局部视图为String [英] How to Render Partial View into a String

问题描述

我有以下的code：

public ActionResult SomeAction()
{
    return new JsonpResult
    {
        Data = new { Widget = "some partial html for the widget" }
    };
}

我想修改它，这样我可以有

I'd like to modify it so that I could have

public ActionResult SomeAction()
{
    // will render HTML that I can pass to the JSONP result to return.
    var partial = RenderPartial(viewModel); 
    return new JsonpResult
    {
        Data = new { Widget = partial }
    };
}

这可能吗？有人能解释如何？

is this possible? Could somebody explain how?

注意后，我张贴解决方案之前编辑的问题。

note, I edited the question before posting the solution.

推荐答案

这是问题的解答略加修改的版本：

This is a slightly modified version of an answer that works:

public static string RenderPartialToString(string controlName, object viewData)
        {
            ViewPage viewPage = new ViewPage() { ViewContext = new ViewContext() };

            viewPage.ViewData = new ViewDataDictionary(viewData);
            viewPage.Controls.Add(viewPage.LoadControl(controlName));

            StringBuilder sb = new StringBuilder();
            using (StringWriter sw = new StringWriter(sb))
            {
                using (HtmlTextWriter tw = new HtmlTextWriter(sw))
                {
                    viewPage.RenderControl(tw);
                }
            }

            return sb.ToString();
        }

用法：

string ret = RenderPartialToString("~/Views/MyController/MyPartial.ascx", model);

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