如何处理动态创建图像按钮单击事件 [英] How to handle Dynamically Create Image Button Click Event

问题描述

我需要动态创建Image Button，并且必须生成click事件..但是当点击图像按钮时，click事件不会生成并隐藏Image按钮..我的代码中有什么问题..



protected void Button1_Click（object sender，EventArgs e）
{
DBConnections.GetCon obj = new DBConnections.GetCon（）;

MySqlConnection con = new MySqlConnection（obj.getConStr（））;
con.Open（）;
MySqlCommand cmd = new MySqlCommand（SELECT * FROM< tabel>，con）;
MySqlDataReader dr = cmd.ExecuteReader（）;

while（dr.Read（））
{
imgBtn = new ImageButton（）;
//图片imgBtn = new Image（）;


imgBtn.ID = dr.GetInt32（1）.ToString（）;
if（dr.GetInt32（2）== 0）
{
imgBtn.ImageUrl =〜/ Users / SeatImg / 1.jpg;
}
其他
{
imgBtn.ImageUrl =〜/ Users / SeatImg / 3.jpg;
}



imgBtn.Click + = new ImageClickEventHandler（img_Click）;
this.Panel2.Controls.Add（imgBtn）;
}
con.Close（）;

}

protected void img_Click（object sender，ImageClickEventArgs e）
{
imgBtn.PostBackUrl =www.google.com;
}

解决方案

原因是由于ASP.NET页面是无国籍。



查看此链接，这可以解决您的问题。

在ASP.NET中动态创建控件 [ ^ ]

I need to create Image Button dynamically, and have to generate click event.. But while clicking on image button, the click event is not generating and hiding the Image button.. What is the problem in my code..

This is my code..

 ImageButton imgBtn; 

protected void Button1_Click(object sender, EventArgs e)
        {
            DBConnections.GetCon  obj= new DBConnections.GetCon();

            MySqlConnection con = new MySqlConnection(obj.getConStr());
            con.Open();
            MySqlCommand cmd = new MySqlCommand("SELECT * FROM <tabel>",con);
            MySqlDataReader dr = cmd.ExecuteReader();

            while (dr.Read())
            {
                imgBtn = new ImageButton();
                //Image imgBtn = new Image();
                
                
                imgBtn.ID = dr.GetInt32(1).ToString();
                if (dr.GetInt32(2) == 0)
                {
                    imgBtn.ImageUrl = "~/Users/SeatImg/1.jpg";
                }
                else
                {
                    imgBtn.ImageUrl = "~/Users/SeatImg/3.jpg";
                }



                imgBtn.Click += new ImageClickEventHandler(img_Click);
                this.Panel2.Controls.Add(imgBtn);
            }
            con.Close();

        }

        protected void img_Click(object sender, ImageClickEventArgs e)
        {
            imgBtn.PostBackUrl = "www.google.com";
        }

解决方案

Hi,
The reason is due to the ASP.NET page is Stateless.

Check this link this has solution for your problem.
Dynamically Created Controls in ASP.NET[^]

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