How to access values of dynamically created TextBoxes

Posted: Thursday, April 22, 2004 in Uncategorized

If one adds controls dynamically to a page and wants to get their information after PostBack, one needs to recreate these elements after the PostBack. Let’s consider the following idea: First you create some controls:


   for(int i0;i<10;i++) {
      TextBox objBox new TextBox();
      objBox.ID  “objBox” + iToString();
      this.Page.Controls.Add(objBox);
   }


After PostBack, you want to retrieve the text entered in the third TextBox. If you try this:


   String strText objBox2.Text;


you’ll receive an exception. Why? Because the boxes have not been created again and the local variable objBox2 simply not exists.


How to retrieve the Box?


You’ll need to recreate the box by using the code above. Then, you may try to get its value by using the following code:


   TextBox objBox2;
   objBox2 this.Page.FindControl(“objBox2”) as TextBox;
   if(objBox2 ! null)
      Response.Write(objBox2.Text);


Try it and take a look at the result. Did it work well for you?
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