Getting value from html radio button - in aspx-c#

Nave Tseva picture Nave Tseva · Mar 29, 2013 · Viewed 73.4k times · Source

I have the following HTML source

<form name="Register1" action="Register.aspx" id="registerform" method="post" 
      runat="server" style="margin-top: 15px;">
    <input type="radio" name="Gender" value="male" />male
    <input type="radio" name="Gender" value="female" />female
</form>

My question is how can I get the selected value to variable in the c# page?

I tried this :

Gender = Request.Form["Gender"].ToString();

But it didn't work...

Answer

Manish Mishra picture Manish Mishra · Mar 29, 2013

place your code like this:

 if (Request.Form["Gender"] != null)
 {
     string selectedGender = Request.Form["Gender"].ToString();
 }

Note that Request.Form["Gender"] will be null if none of the RadioButtons are selected.

see the markup below

<form id="form1" runat="server" method="post">
    <input type="radio" name="Gender" value="male" id="test" checked="checked" />
    male
    <input type="radio" name="Gender" value="female" />female
    <input type="submit" value="test" />
    <asp:Button ID="btn" runat="server" Text="value" />
</form>

for both the buttons i.e input type="submit" and usual asp:button, Request.Form["Gender"] is going to have some value upon PostBack, provided, either of the RadioButtons is selected.

And yes, upon PostBack only, i.e. when you hit either of the buttons and not on first load.