C# 是否有方法在代码隐藏中创建asp控件并将其呈现为html字符串？

如何创建新的DropDownList（或任何asp服务器控件），然后将html呈现为C#中的字符串？

System.Web.UI.control有一种方法可用于将控件的呈现内容获取为字符串：

using(var sw = new System.IO.StringWriter()) // SW is a buffer into which the control is rendered
using(var writer = new HtmlTextWriter(sw))
{
    myControl.RenderControl(writer);
    return sw.ToString(); // This returns the generated HTML.
}

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System.Web.UI.Control有一个方法，可用于将控件的呈现内容获取为字符串：

using(var sw = new System.IO.StringWriter()) // SW is a buffer into which the control is rendered
using(var writer = new HtmlTextWriter(sw))
{
    myControl.RenderControl(writer);
    return sw.ToString(); // This returns the generated HTML.
}