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adding a text box to a radio button list?

Posted on 2008-11-03
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Last Modified: 2012-06-27
Hi, I have a radio button list, but was hoping to add a textbox to the last option like this.  Is this possible to do?  If this radio button is selected, is it possible to make entering info into the text box required?  Thanks!

 Status:*
undergraduate
graduate
faculty or staff
guest user (non-TWU).  What school are you from? [text box here]
<br />

																		 Status:*<br /><asp:RadioButtonList id="status" runat="server">
 

                                <asp:ListItem id="status_undergrad" runat="server" Value="undergraduate" />

                                <asp:ListItem id="status_grad" runat="server" Value="graduate" />

                                <asp:ListItem id="status_fs" runat="server" Value="faculty or staff" />

                                <asp:ListItem id="status_guest" runat="server" Value="guest user (non-TWU)" />

                            </asp:RadioButtonList>												 <asp:RequiredFieldValidator ID="RequiredFieldValidator3" ControlToValidate="status"

                            ErrorMessage="TWU Status" runat="Server" Text="*Status Required"></asp:RequiredFieldValidator>

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Question by:jianxin9
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by:Bob Learned
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I would think that you need to toggle the Enabled property for the RequiredFieldValidator, when the selected option in the RadioButtonList is changed.
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by:jianxin9
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Thanks!  Can anyone show me an example of how to do that?
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Expert Comment

by:Bob Learned
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Attach an event handler to the SelectedIndexChanged event, and change the RequiredFieldValidator.Enabled = (RadioButtonList.SelectedIndex = <index of the item that you are working with>.
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Author Comment

by:jianxin9
Comment Utility
Thanks!   Would it look like this?  I'm not really sure....


                                <asp:ListItem id="status_undergrad" runat="server" Value="undergraduate" />

                                <asp:ListItem id="status_grad" runat="server" Value="graduate" />

                                <asp:ListItem id="status_fs" runat="server" Value="faculty or staff" />

                                <asp:ListItem id="status_guest" runat="server" Value="guest user (non-TWU)" />What school are you from?<asp:TextBox ID="status_school" runat="Server" />

                            </asp:RadioButtonList>                                                                                               <asp:RequiredFieldValidator ID="RequiredFieldValidator3" ControlToValidate="status"

                            ErrorMessage="TWU Status" runat="Server" Text="*Status Required" Enabled = (RadioButtonList.SelectedIndex = <status>

							</asp:RequiredFieldValidator>

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by:Bob Learned
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That is the fun part of trying to figure out ASP.NET--trying to find just the right form.

An answer can be found here:

ListControl..::.SelectedIndexChanged Event
http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.listcontrol.selectedindexchanged.aspx
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by:jianxin9
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thanks!  yeah, i am still confused about how to put it all together--thanks for the link
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Author Comment

by:jianxin9
Comment Utility
Hmmm...I am still stumped on this--if anyone could formulate an example of how this might work using my code I would really appreciate it!  Thanks!
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Bob Learned earned 500 total points
Comment Utility
That someone is going to be me, and I am going to try to get you where you need to be, without doing the work for you.

Important points from the article:

1) Attach an event handler in HTML for the SelectedIndexChanged event

<asp:RadioButtonList id="RadioButtonList1"
            OnSelectedIndexChanged="Index_Changed"
            AutoPostBack="true"
            runat="server"/>

2) Define the event handler in the code-behind

   VB.NET:
   Sub Index_Changed(sender As Object, e As EventArgs)        
        Label1.Text = "You selected " & RadioButtonList1.SelectedItem.Text & _
            " with a value of : " & RadioButtonList1.SelectedItem.Value & "."
    End Sub

    C#:
    void Index_Changed(Object sender, EventArgs e) {

       Label1.Text = "You selected " + RadioButtonList1.SelectedItem.Text +
                     " with a value of $" + RadioButtonList1.SelectedItem.Value +
                     ".";

    }
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Author Comment

by:jianxin9
Comment Utility
I do appreciate the help--thank you.   Okay, I am getting errors when I load the page--but this is what I'm trying. Am I on the right track at all?
Info before closing script tag:

} 

    // Allow the user to enter in their school information if from another institution
 

 void Index_Changed(Object sender, EventArgs e) {
 

       Label1.Text = "You selected " + RadioButtonList1.SelectedItem.Text +

                     " Please tell us what school you are from" + RadioButtonList1.SelectedItem.Value +

                     ".";
 

    }
 

								
 

Status:*<br /><asp:RadioButtonList id="status" runat="server">
 

                                <asp:ListItem id="status_undergrad" runat="server" Value="undergraduate" />

                                <asp:ListItem id="status_grad" runat="server" Value="graduate" />

                                <asp:ListItem id="status_fs" runat="server" Value="faculty or staff" />

                                 <asp:ListItem id="status_guest" OnSelectedIndexChanged="Index_Changed"

            AutoPostBack="true" runat="server" Value="guest user (non-TWU)" /></asp:RadioButtonList>   What school are you from?<asp:Label id="Label1" runat="server"/>

                                                                 				 <asp:RequiredFieldValidator ID="RequiredFieldValidator3" ControlToValidate="status"

                            ErrorMessage="TWU Status" runat="Server" Text="*TWU Status Required"></asp:RequiredFieldValidator><br />

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Expert Comment

by:Bob Learned
Comment Utility
That is the right track, but you are referencing Label1, which you don't have on the page, so you need to change the Index_Changed event handler to do what you need, which is to look at the RadioButtonList's selected item, and determine how to set RequiredFieldValidator.Enabled.
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Author Comment

by:jianxin9
Comment Utility
Hmm...well, I'm confused about the example--where does the text box come in?

Is this any closer?  Sorry--I'm pretty new to this and very lost.
Info before closing script tag:

} 

    // Allow the user to enter in their school information if from another institution

 

 void Index_Changed(Object sender, EventArgs e) {

 

       Label1.Text = "You selected " + status_guest.SelectedItem.Text +

                     " Please tell us what school you are from" + status_guest.SelectedItem.Value +

                     ".";

 

    }

 

                                                                

 

Status:*<br /><asp:RadioButtonList id="status" runat="server">

 

                                <asp:ListItem id="status_undergrad" runat="server" Value="undergraduate" />

                                <asp:ListItem id="status_grad" runat="server" Value="graduate" />

                                <asp:ListItem id="status_fs" runat="server" Value="faculty or staff" />

                                 <asp:ListItem id="status_guest" OnSelectedIndexChanged="Index_Changed"

            AutoPostBack="true" runat="server" Value="guest user (non-TWU)" /></asp:RadioButtonList>   What school are you from?<asp:Label id="Label1" runat="server"/>

                                                                                                 <asp:RequiredFieldValidator ID="RequiredFieldValidator3" ControlToValidate="status"

                            ErrorMessage="TWU Status" runat="Server" Text="*TWU Status Required"></asp:RequiredFieldValidator><br />

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Author Comment

by:jianxin9
Comment Utility
For anyone that can help with this--is this any closer?  Thanks!
Hidden Code:
 

}       

         

         //Give users the option to enter school information

         Protected Sub rbl1_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles rbl1.SelectedIndexChanged

     

  If rblAns.SelectedValue = "status_guest" Then

      ctlValidation.enabled = True

  else

      ctlValidation.enabled = False

  End If

 

End Sub

</script>
 
 
 
 

      Status:*<br /><asp:RadioButtonList id="status" runat="server">
 

                                <asp:ListItem id="status_undergrad" runat="server" Value="undergraduate" />

                                <asp:ListItem id="status_grad" runat="server" Value="graduate" />

                                <asp:ListItem id="status_fs" runat="server" Value="faculty or staff" />

                                 <asp:ListItem id="status_guest" runat="server" Value="guest user (non-TWU)" /></asp:RadioButtonList>   
 

                                                                                  <asp:RequiredFieldValidator ID="RequiredFieldValidator3" ControlToValidate="status"

                            ErrorMessage="Status" runat="Server" Text="*TWU Status Required"></asp:RequiredFieldValidator><br />

                                                        What school are you from?<asp:TextBox ID="school" runat="Server" />

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Author Closing Comment

by:jianxin9
Comment Utility
thanks for the help
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