AsyncFileUpload 在自定义控件中动态添加

Question

正在创建一个将具有异步文件上传控件的自定义控件。但是，当我尝试在无法添加获取 Complie 时间错误的控件中添加 Async FileUpload 时。以下是我的代码

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using AjaxControlToolkit;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace SBITS.CustomControl
{
class CustomFileUpload:CompositeControl
{

    private AsyncFileUpload asyncFileUpload;

    private Image throbberImage;


    protected override void CreateChildControls()
    {

        this.throbberImage = new Image();
        this.throbberImage.ImageUrl = Constant.THROBBER_IMAGE_PATH;
        this.Controls.Add(throbberImage);

        this.asyncFileUpload = new AsyncFileUpload();
        this.asyncFileUpload.ThrobberID = throbberImage.ID;
        this.Controls.Add(asyncFileUpload);
    }
}  }

此行出错

 this.Controls.Add(asyncFileUpload);

错误屏幕

编译时错误

Answer 1

已解决问题刚刚将 system.web.Extension 的引用添加到我的项目并完成。

AsyncFileUpload 在自定义控件中动态添加

AsyncFileUpload Dynamically add in custom control

c#

custom-controls

ajaxcontroltoolkit