Radio button check and on check

Hi Experts,

I have a radio button in side my gridview control.
<asp:radiobutton ID="RBShowManu" runat="server"  AutoPostBack="true" >asp:radiobutton>

When I click the radio button it checked it. When I click the next radio button it checked the other one too. What can I do to check only one radio button at a time. I am using ASP.NET and VB.NET

Thank you
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You need a "groupname"

Like this
<asp:radiobutton ID="RBShowManu" runat="server" GroupName="showmenu"  AutoPostBack="true" >asp:radiobutton>

<asp:radiobutton ID="SecondRBShowManu" runat="server" GroupName="showmenu"  AutoPostBack="true" >asp:radiobutton>
RadhaKrishnaKiJayaAuthor Commented:
Thank you for your reply. I changed it but still it is selecting all the radio buttons when I click. I want to select only one radio button which I click.
Post your code
RadhaKrishnaKiJayaAuthor Commented:
Thank you for trying to help me. But its working now. I used the following code.

 Protected Sub GridView_RadioButton_CheckedChanged(ByVal sender As Object, ByVal e As System.EventArgs)

        Dim SenderRB As RadioButton = sender
        'SenderRB.Checked = True
        Dim gvr As GridViewRow = SenderRB.NamingContainer
        Dim rb As RadioButton = CType(GVViewParts.Rows(gvr.RowIndex).FindControl("RBShowManu"), RadioButton)
        rb.Checked = True
end sub

Sub deselect_RB_in_gridview()
        Dim gvr As GridViewRow
        Dim i As Int32
        'deselect all radiobutton in gridview
        For Each gvr In GVViewParts.Rows
            Dim rb As RadioButton
            rb = CType(GVViewParts.Rows(i).FindControl("RBShowManu"), RadioButton)
            rb.Checked = False
            i += 1
    End Sub

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RadhaKrishnaKiJayaAuthor Commented:
I found the solution. Thank you.
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Visual Basic.NET

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