Applying Single Selection to the CheckBox in a GridView using ASP.NET

Suppose you have a CheckBox in the GridView as a TemplateField and you want two make it single checkable. This will help you to do the same. Using this you will be able to select only one CheckBox at a time.

Step 1: Put the following java script code in the head section of the webpage.

Step 2: Here I have taken a checkbox as a TemplateField of the GridView and just call the above javascript function to make it single checkable.

<asp:GridView ID="GridView1" GridLines="Both"
runat="server" Width="100%" CellPadding="4"
Font-Size="Smaller" AutoGenerateColumns="False"
ForeColor="Blue" onrowdatabound="GridView1_RowDataBound">
<Columns>
<asp:TemplateField>
<ItemTemplate>
<asp:CheckBox ID="CheckBox1" runat="server" OnCheckedChanged="CheckBox1_CheckedChanged"Visible="true"
OnDataBinding="CheckBox1_DataBinding" onclick ="CheckSingleCheckbox(this)" />
</ItemTemplate>
</asp:TemplateField>
<asp:BoundField DataField="CHANNEL" HeaderText="Channel No"/>
<asp:BoundField DataField="STATUS" HeaderText="Status"/>
<asp:BoundField DataField="DIALING_NUMBER" HeaderText="Dialing No"/>
<asp:BoundField DataField="NAME" HeaderText="Name"/>
<asp:BoundField DataField="COMPANY_NAME" HeaderText="Company Name"/>
<asp:BoundField DataField="CONNECT_TIME" HeaderText="Connect Time"/>
<asp:BoundField DataField="DURATION" HeaderText="Duration"/>
</Columns>
<FooterStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
<PagerStyle BackColor="#284775" ForeColor="White" HorizontalAlign="Center" />
<SelectedRowStyle BackColor="#E2DED6" Font-Bold="True" ForeColor="#333333" />
<HeaderStyle BackColor="#00AAFF" Font-Bold="True" ForeColor="White" />
<EditRowStyle BackColor="#999999" />
</asp:GridView>