Dynamic text box generation from drop down list(C#)

Question

Im using C# in VS 2010 to develop a web page.

the below is what i used to develop the dynamic text box for a certain drop down option...the problem im facing is that the text box is not being generated when i select the option.It is generated only when i clik a button or do some activity.

What changes should i do OR where to place the code to generate the text box as soon i select the option in the drop down control

        TextBox new_textbox = new TextBox();
        new_textbox.ID = "txt" + 1;
        new_textbox.Text = "";
        PlaceHolder1.Controls.Add(new_textbox);
        Label5.Visible = true;

Is that code fired when the selected index of your drop down changes? — Abe Miessler
– Abe Miessler, Commented Jun 1, 2012 at 16:45
Debug and see what property new_textbox has a value that might cause the issue (for example: location, visibility, size) — YoryeNathan
– YoryeNathan, Commented Jun 1, 2012 at 16:45
As Abe says. Where in your code is that piece fired? is it on DDL changed? or happening only on postback? You would still be better off doing this with jquery. — Brian
– Brian, Commented Jun 1, 2012 at 16:48

giftcv · Accepted Answer · 2012-06-04 06:19:45Z

1

set AutoPostBack="True" in your dropdownlist

<asp:DropDownList ID="DropDownList1" runat="server" AutoPostBack="True">

When AutoPostBack Property is set to 'true' a postback to the server occurs automatically whenever the user selects an item from the list. By default it is set to 'false'.

edited Jun 4, 2012 at 6:19

answered Jun 1, 2012 at 17:00

giftcv

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