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how to validate radio button in gridview [Resolved]

Posted by Munder2013 under ASP.NET on 12/13/2013 | Points: 10 | Views : 9648 | Status : [Member] | Replies : 11
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Hi Experts,
I'm facing problem to validate radio button in gridview.
I'm marking student attendance with single button and I placed 3 radio button rdbPresent, rdbAbsent & rdbLeave for each student.

I want alert on button click If I missed attendance for any Student.

Thanks & Regards
Baljeet Singh

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Posted by: vishalneeraj-24503 on: 12/14/2013 [Member] [MVP] Platinum | Points: 50

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Yes,you have to validate all your radio buttons in button click.
Because you all radio buttons are inside gridview.

write my above code inside button click as

protected boid btn_validate()
{
    RadioButton rdbPresent = grid.rows[index].findcontrol("rdbPresent") 
   //find same for rest of the radiobuttons 
   //Here index is your gridview row index

   //now check and validate
   if(rdbPresent.checked == false && rdbAbsent.checked == false && rdbLeave.checked == false) 
   {      
     //message,please check either one radiobutton. 
     return; 
   }
}


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Posted by: vishalneeraj-24503 on: 12/13/2013 [Member] [MVP] Platinum | Points: 25

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you can first find radio buttn inside gridview as
radiobutton rdbPresent = grid.rows[index].findcontrol("rdbPresent")
find same for rest of the radiobuttons

Here index is your gridview row index

now check

if(rdbPresent.checked==false &&rdbAbsent .checked==false && rdbLeave.checked == false)
{
//message,please check either one radiobuttons.
return;
}

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Posted by: Munder2013 on: 12/14/2013 [Member] Starter | Points: 25

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Will the entire code be placed on buttonClick event ???

Thanks & Regards
Baljeet Singh

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Posted by: Munder2013 on: 12/14/2013 [Member] Starter | Points: 25

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I have 3 radio buttons in one template field like this :

<asp:TemplateField HeaderText="Status">
<ItemTemplate>

<asp:RadioButton ID="rdbPresent" AutoPostBack="true" runat="server"
AccessKey="P" GroupName="s"
Text="Present" oncheckedchanged="rdbPresent_CheckedChanged" />
<asp:RadioButton ID="rdbAbsent" AutoPostBack="true" runat="server"
AccessKey="A" GroupName="s"
Text="Absent" oncheckedchanged="rdbAbsent_CheckedChanged" />
<asp:RadioButton ID="rdbLeave" AutoPostBack="true" runat="server" AccessKey="L" GroupName="s"
Text="Leave" oncheckedchanged="rdbLeave_CheckedChanged" />

</ItemTemplate>
</asp:TemplateField>

Thanks & Regards
Baljeet Singh

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Posted by: Allemahesh on: 12/16/2013 [Member] [MVP] Silver | Points: 25

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Can you tell me you button is present inside the GirdView or outside of GridView?

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Posted by: Munder2013 on: 12/16/2013 [Member] Starter | Points: 25

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Hi Allemahesh,

There is a single button outside of the GridView to mark attendance for all students.

Thanks & Regards
Baljeet Singh

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Posted by: Allemahesh on: 12/16/2013 [Member] [MVP] Silver | Points: 25

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You can use the below javascript code:-

<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
    <title></title>

    <script type="text/javascript" language="javascript">

        function ValidateSelection() {
            var grid = document.getElementById("gv1");
            var Selected = 0;
            for (i = 1; i < grid.rows.length; i++) {
                if (grid.rows[i].getElementsByTagName("input")[0] != null
                    && grid.rows[i].getElementsByTagName("input")[0].type == "radio") {
                    if (grid.rows[i].getElementsByTagName("input")[0].checked == false
                    && grid.rows[i].getElementsByTagName("input")[1].checked == false
                    && grid.rows[i].getElementsByTagName("input")[2].checked == false) {
                        alert('Please select any row to proceed.');
                        return false;
                    }
                }
            }
            return false;
        }

    </script>

</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:GridView ID="gv1" runat="server" AutoGenerateColumns="False">
            <Columns>
                <asp:TemplateField HeaderText="Status">
                    <ItemTemplate>
                        <asp:RadioButton ID="rdbPresent" runat="server" AccessKey="P" GroupName="s" Text="Present" />
                        <asp:RadioButton ID="rdbAbsent" runat="server" AccessKey="A" GroupName="s" Text="Absent" />
                        <asp:RadioButton ID="rdbLeave" runat="server" AccessKey="L" GroupName="s" Text="Leave" />
                    </ItemTemplate>
                </asp:TemplateField>
            </Columns>
        </asp:GridView>
        <asp:Button ID="Button1" runat="server" Text="Button" OnClientClick="return ValidateSelection();" />
        </button>
    </div>
    </form>
</body>
</html>


Happy Coding
If it helps you or directs U towards the solution, 
MARK IT AS ANSWER


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Posted by: vishalneeraj-24503 on: 12/16/2013 [Member] [MVP] Platinum | Points: 25

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Did you try

protected boid btn_validate()
{
RadioButton rdbPresent = grid.rows[index].findcontrol("rdbPresent")
//find same for rest of the radiobuttons
//Here index is your gridview row index

//now check and validate
if(rdbPresent.checked == false && rdbAbsent.checked == false && rdbLeave.checked == false)
{
//message,please check either one radiobutton.
return;
}
}


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Posted by: Munder2013 on: 12/24/2013 [Member] Starter | Points: 25

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Hi Allemahesh,
Thanks for your response. I got solution

Thanks & Regards
Baljeet Singh

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Posted by: Munder2013 on: 12/24/2013 [Member] Starter | Points: 25

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Hi Vishal,

Thank you Vishal. I placed that code inside foreach loop & its working fine

Thanks & Regards
Baljeet Singh

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Posted by: vishalneeraj-24503 on: 12/24/2013 [Member] [MVP] Platinum | Points: 25

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Welcome Munder :)

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