[基于OP的评论]

你必须添加像这样的textchanged事件

 txtbox.TextChanged + = new EventHandler（txtbox_TextChanged）; // txtbox是动态生成的文本框

正常实施

  private   void  txtbox_TextChanged（ object  sender，EventArgs e）
 {
 //  您的代码在这里 
} 

问候......：笑：

How to prevent disappearing of dynamically added rows of a table with TexBoxes in the AutopostBack of TextBoxes in that row.

[Based on OP's comments]
You have to add textchanged event like this

txtbox.TextChanged += new EventHandler(txtbox_TextChanged);//txtbox is dynamically generated textbox

Implement it as normal

private void txtbox_TextChanged(object sender, EventArgs e)
    {
        //your code goes here
    }

Regards..:laugh: