dropdownlist

phuc2583 · March 10th, 2009, 10:01 PM

Hello everyone
Please guide me how to create dropdownlist when i want it show 3 dropdownlist
EX.
I input the number 3 into textbox.
and then it show 3 dropdownlist.
that mean amount of dropdownlist depending on the number on textbox.
Thanks
Regards
Phuc Hoang

dparsons · March 10th, 2009, 10:53 PM

Depends. Do you want to do this client side or server side? Is there a button involved or is this some sort of AJAX that is fired off when the Textbox value changes?

Since you posted in the ASP.NET forum I will assume you want to do this server side so some code like the following would work:

csharp Code:

for(int i = 0; i < Convert.ToInt32(textBox1.Text); i++)
{
  ListItem item = new ListItem("someText", "someValue");
  DropDownList1.Items.Add(item);
}

Obviously there is no error checking in this code to check to make sure that a whole number was passed in and not, say, a string but you should get the idea.

hth.
-Doug

phuc2583 · March 11th, 2009, 04:40 AM

Quote:

Originally Posted by dparsons

Depends. Do you want to do this client side or server side? Is there a button involved or is this some sort of AJAX that is fired off when the Textbox value changes?

Since you posted in the ASP.NET forum I will assume you want to do this server side so some code like the following would work:

csharp Code:

for(int i = 0; i < Convert.ToInt32(textBox1.Text); i++)
{
  ListItem item = new ListItem("someText", "someValue");
  DropDownList1.Items.Add(item);
}

Obviously there is no error checking in this code to check to make sure that a whole number was passed in and not, say, a string but you should get the idea.

hth.
-Doug

Thanks so much for helping me to do that