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Editorial Team
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Asked: 2026-05-31T10:14:06+00:00

I need to create a radiobuttonlist containing a other option, and i have to

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I need to create a radiobuttonlist containing a “other” option, and i have to put a textbox next to it. Here is what i did. 

if(!ispostpage){
PlaceofWork.DataSource = workplace;
PlaceofWork.DataBind();
PlaceofWork.DataTextField = "WorkPlace1";
PlaceofWork.DataValueField = "WorkID";
PlaceofWork.Items.Add(new ListItem("Other - Specify<input name=\"OtherWorkPlace\" type=\"text\" value=\"test\" id=\"OtherWorkPlace\"/>", "-1"));

This radiobuttonlist is in a usercontrol.
at the first I didn’t add if(!ispostpage) so when i try Request.Form["OtherWorkPlace"], it didn’t return anything

after i add the code if(!ispostpage), it pop up the error “Object reference not set to an instance of an object”

So how can I get the value of the input textbox?

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1 Answer

  1. Editorial Team

    You could use a hidden field control on the asp .net side. 

    <asp:HiddenField runat="server" ID="rbOtherText" />

    The set the value of the control using a javascript onblur event.

     PlaceofWork.Items.Add(new ListItem("Other - Specify<input name=\"OtherWorkPlace\" type=\"text\" value=\"test\" onblur=\"document.getElementById('" & rbOtherText.ClientID & "').value = this.value;\" />", "-1"));

    Then in the code behind just reference the HiddenField.

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