Allowing only one radio button to be checked in each row of grid view

Question

Hi guys i used a grid view to insert multiple rows of record into the database . this is how my grid view looks like

The problem is that all radio buttons can be selected , i need only 1 radio button to be selected for each row .. . My web form works in the way where user have to select the correct answer out of the two textboxes with a radio button then i will have to submit the checked answer to database . is this possible?

aspx : `

             <asp:ButtonField Text="SingleClick" CommandName="SingleClick"
                    Visible="False" />

                    <asp:TemplateField HeaderText="Question">
                        <ItemTemplate>
                            <br />
                            <asp:TextBox ID="TextBox1" runat="server" TextMode="MultiLine"></asp:TextBox>
                        </ItemTemplate>
                    </asp:TemplateField>
                    <asp:TemplateField HeaderText="Answer">
                        <ItemTemplate>
                            <br />
                            <asp:TextBox ID="TextBox2" runat="server"></asp:TextBox>
                            <asp:RadioButton ID="RadioButton1" runat="server" />
                            <br />
                            <asp:TextBox ID="TextBox3" runat="server"></asp:TextBox>
                            <asp:RadioButton ID="RadioButton2" runat="server" />
                        </ItemTemplate>
                    </asp:TemplateField>
                    <asp:TemplateField ShowHeader="False">
                        <FooterTemplate>
                            <asp:Button ID="btnAdd" runat="server" Text="+" onclick="btnAdd_Click1" />
                        </FooterTemplate>

                    </asp:TemplateField>
                </Columns>
            </asp:GridView>
    </td>
</tr>`

code behind :

  protected void RadioButton1_CheckedChanged(object sender, EventArgs e)
    {
        //Clear the existing selected row 
        foreach (GridViewRow oldrow in GridView1.Rows)
        {
            ((RadioButton)oldrow.FindControl("RadioButton1")).Checked = false;
        }

        //Set the new selected row
        RadioButton rb = (RadioButton)sender;
        GridViewRow row = (GridViewRow)rb.NamingContainer;
        ((RadioButton)row.FindControl("RadioButton1")).Checked = true;

    }

Answer 1

I assume you're talking about ASP.NET. Did you try grouping the radio buttons together?

Here's an example.

<asp:RadioButton id="rBtn1" GroupName="Fruits"
         Text="Apple" runat="server"/>
<asp:RadioButton id="rBtn2" GroupName="Fruits"
         Text="Orange" runat="server"/>
<asp:RadioButton id="rBtn3" GroupName="Colors"
         Text="Blue" runat="server"/>
<asp:RadioButton id="rBtn4" GroupName="Colors"
         Text="Red" runat="server"/>

When Apple is selected, Orange can't be selected. If Orange is selected while Apple is selected, Apple will automatically be un-selected. But when Apple is selected, when you click Blue, Apple won't be un-selected.

Answer 2

Just try to use a javascript function like

<script language="javascript" type="text/javascript">
function SelectSingleRadiobutton(rdbtnid) {
var rdBtn = document.getElementById(rdbtnid);
var rdBtnList = document.getElementsByTagName("input");
for (i = 0; i < rdBtnList.length; i++) {
if (rdBtnList[i].type == "radio" && rdBtnList[i].id != rdBtn.id)
{
rdBtnList[i].checked = false;
}
}
}
</script>

Grid View

<asp:GridView ID="gvdata" runat="server" CssClass="Gridview" AutoGenerateColumns="false" DataKeyNames="UserId" HeaderStyle-BackColor="#7779AF" HeaderStyle-ForeColor="White">
<Columns>
<asp:TemplateField>
<ItemTemplate>
<asp:RadioButton id="rdbUser" runat="server" OnClick="javascript:SelectSingleRadiobutton(this.id)" />
</ItemTemplate>
</asp:TemplateField>
<asp:BoundField DataField="UserName" HeaderText="Name"/>
<asp:BoundField DataField ="FirstName" HeaderText="FirstName" />
<asp:BoundField DataField="LastName" HeaderText="LastName" />
<asp:BoundField DataField="Location" HeaderText="Location" />
</Columns>
</asp:GridView>

Try to check aspdotnet

Check this asp.net

Hope it works.

Answer 3

<input id="HDDepMood_0" name="DepMood" type="radio"  runat="server" />
Same name for the one group. 

Answer 4

I think you may proceed like this :-

protected void rbtnSelect_CheckedChanged(object sender, EventArgs e)
{
RadioButton selectButton = (RadioButton)sender;
GridViewRow gvrow = (GridViewRow)selectButton.Parent.Parent;
var radio = (RadioButton)gvRow.FindControl("rdo");// rdo is ID of your radio button:-
if(radio[0].id=selectButton.id)
radio[1].checked=false;
else if(radio[1].id=selectButton.id)
radio[0].checked=false;
}

Answer 5

Just add some script to your page to set the groupname:

$('input[type=radio]').each(function () {
    var array = $(this).attr('name').split('$');
    $(this).attr('name', array[array.length - 1]);
});

This wil adjust the name rendered to the correct group name.

Answer 6

<script src="http://code.jquery.com/jquery-1.10.2.js"></script>
<script language="javascript">
    function singleRbtnSelect(chb) {
        $(chb).closest("table").find("input:radio").prop("checked", false);
        $(chb).prop("checked", true);
    }
</script>