创建在asp.net中动态控制 [英] creating dynamic control in asp.net

问题描述

我要创建一个一个FileUpload控件的LinkBut​​ton 单击事件。第一次是创造了控制，但如果我preSS的链接按钮第二次，这不是创造。什么是什么问题？以下是我的code：

I'm creating a fileupload control on a linKbutton click event. First time it's creating the controls, but if I press the link button second time, it's not creating. What is the problem with that? The following is my code:

protected void LinkButton1_Click(object sender, EventArgs e)
{
    newattach();
}

private void newattach()
{
    int i;
    for (i = 0; i < 2; i++)
    {
        count++;
        FileUpload f1 = new FileUpload();
        f1.ID = "fileupload" + count.ToString();
        f1.Height = 34;
        f1.Width = 212;
        Panel1.Controls.Add(f1);
    }
}

count是一个静态变量。请帮助。

and count is a static variable. Please help.

推荐答案

当您创建控件动态使用ASP.NET你需要在每次回发时重新控制，一般你重新创建的Page_Load控制。这是最有可能您的问题的原因。

When you create controls dynamically with ASP.NET you need to recreate the control every time you post back, generally you recreate the control on Page_Load. That is most likely the cause of your problem.

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