高分请教webcontrol的事件处理问题>

Question

我在webcontrol里加了一个按钮,然后希望这个按钮的click事件在webcontrol里来处理,本来是件很容易的事,但是click事件根本就没有响应,但是页面还是会刷新的.以下是代码,请大家多多指教                browerButton.Click += new EventHandler(browerButton_Click); void browerButton_Click(object sender, EventArgs e)
        {
.........
        }

Answer 1

请问你的webcontrol是动态添加的吗？如果是要在服务器端重新添加一次，服务器会在postback时重建现场。

Answer 2

ASP.NET的按钮生命周期是PostBack后先重新构建页面，页面构建完后才执行按钮事件，
还有如果你是动态添加的控件的话，一定要对你需要操作的控件的ID赋值

Answer 3

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Text;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;namespace Unidefine.Model
{
    /// <summary>
    /// 商品图片列表
    /// </summary>
    [DefaultProperty("Text")]
    [ToolboxData("<{0}:ImageList runat=server></{0}:ImageList>")]
    public class ImageList : WebControl
    {
        private Product productInfo;
        delegate void DeleteImage(string imageName);
        private List<string> changedImageList = new List<string>();
        
        public List<string> ChangedImageList
        {
            get { return changedImageList; }
        }
        
        public Product ProductInfo
        {
            get { return productInfo; }
            set { productInfo = value; }
        }       
        protected override void CreateChildControls()
        {
           
            int imageNum = productInfo.images.Length;            for (int i = 0; i < imageNum; i++)
            {
                string imagePath = productInfo.images[i];
                Image image = new Image();
                image.ImageUrl = "images\\" + imagePath;
                image.ID = "image" + i.ToString();
                CheckBox checkBox = new CheckBox();
                checkBox.Text = "更改图片 ";
                checkBox.ID = "checkBox" + i.ToString();
                TextBox imageTextBox = new TextBox();
                imageTextBox.Text = imagePath;
                imageTextBox.ID = "imageTextBox" + i.ToString();
                Button browerButton = new Button();
                browerButton.ID = "browerButton" + i.ToString();
                browerButton.Text = "浏览....";
                Button deleteButton = new Button();
                deleteButton.ID = "deleteButton" + i.ToString();
                deleteButton.Text = "删除";
                checkBox.CheckedChanged += new EventHandler(     checkBox_CheckedChanged);
                checkBox.AutoPostBack = true;
                browerButton.Click += new EventHandler(browerButton_Click);
                Controls.Add(image);
                Controls.Add(checkBox);
                Controls.Add(imageTextBox);
                Controls.Add(browerButton);
                Controls.Add(deleteButton);
            }
       
            base.CreateChildControls();
        }        void browerButton_Click(object sender, EventArgs e)
        {
            Page.Response.Write("<script language=javascript> window.alert('按钮');</script>");
        }        void checkBox_CheckedChanged(object sender, EventArgs e)
        {
            Page. Response.Write("<script language=javascript> window.alert('按钮');</script>");
        }
        
        /// <summary>
        /// Render the contents
        /// </summary>
        /// <param name="output">output</param>
        protected override void RenderContents(HtmlTextWriter output)
        {
            base.RenderContents(output);
        }        /// <summary>
        /// 
        /// </summary>
        /// <param name="e"></param>
        protected override void OnPreRender(EventArgs e)
        {
            base.OnPreRender(e);
        }
        /// <summary>
        /// 
        /// </summary>
        /// <param name="writer"></param>
        protected override void Render(HtmlTextWriter writer) 
        {
            base.Render(writer);
        }
    }
}