ASP.NET如何將控件呈現爲HTML？

Question

我有任何ASP.NET控件。我想要HTML字符串如何獲得控件的HTML字符串？

Answer 1

這似乎工作。

public string RenderControlToHtml(Control ControlToRender) 
{ 
    System.Text.StringBuilder sb = new System.Text.StringBuilder(); 
    System.IO.StringWriter stWriter = new System.IO.StringWriter(sb); 
    System.Web.UI.HtmlTextWriter htmlWriter = new System.Web.UI.HtmlTextWriter(stWriter); 
    ControlToRender.RenderControl(htmlWriter); 
    return sb.ToString(); 
} 

Answer 2

如果你的控制是一個網絡用戶的控制，這是你可以得到它從另一個頁面或處理程序發出的HTML：

public void GetHtmlFromMySweetControl(HttpContext context) 
{ 
    HttpRequest httpRequest = context.Request; 
    HttpResponse httpResponse = context.Response; 

    string foo = httpRequest["foo"]; 

    Page pageHolder = new Page(); 
    string path = "~/usercontrols/MySweetControl.ascx"; 
    MySweetControl ctrl = (MySweetControl)pageHolder.LoadControl(path); 
    ctrl.BindProducts(foo); 
    pageHolder.Controls.Add(ctrl); 

    StringWriter sw = new StringWriter(); 
    context.Server.Execute(pageHolder, sw, false); 
    httpResponse.Write(sw.ToString()); 
} 

Answer 3

通過 David Basarab

接受的答案是行不通的，如果控制不是頁面的一部分。 a7drew的答案似乎不必要複雜 - 無需在Context或Server.Execute。

private string RenderControl() 
{ 
    var sb = new System.Text.StringBuilder(); 
    using (var stWriter = new System.IO.StringWriter(sb)) 
    using (var htmlWriter = new HtmlTextWriter(stWriter)) 
    { 
     var p = new Page(); 
     var ctrl = (YourControl)p.LoadControl("~/controls/building blocks/YourControl.ascx"); 
     ctrl.Visible = true; 

     // do your own init logic if needed 

     p.Controls.Add(ctrl); 
     ctrl.RenderControl(htmlWriter); 
     return sb.ToString(); 
    } 
}