Introduction

This article demonstrates an interesting and very useful concept in GridView.

Question: What is a GridView with Radio Button Binding?

In simple terms, it enables binding to the GridView, by selecting an appropriate radio button item in a grid.

Step 1: Create a new web application

Output1.jpg

Step 2: The complete code of WebForm1.aspx is as in the following:

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="GridViewRadioButtonBindApp.WebForm1" %>

 

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head id="Head1" runat="server">

    <title></title>

</head>

<body>

    <form id="form1" runat="server">

    <center>

        <div>

            <table>

                <tr>

                    <td colspan="2" align="center">

                        <asp:Label ID="Label1" runat="server" Text="GridView Radio Button Bind App" Font-Bold="true"

                            Font-Size="Large" Font-Names="Verdana" ForeColor="Maroon"></asp:Label>

                    </td>

                </tr>

                <tr>

                    <td colspan="2" align="center">

                        <asp:GridView ID="GridView1" runat="server" CssClass="grid" BackColor="LightGoldenrodYellow"

                            BorderColor="Tan" BorderWidth="1px" CellPadding="2" AutoGenerateColumns="false"

                            ForeColor="Black" GridLines="None" OnRowDataBound="GridView1_RowDataBound">

                            <AlternatingRowStyle BackColor="PaleGoldenrod" />

                            <FooterStyle BackColor="Tan" />

                            <HeaderStyle BackColor="Tan" Font-Bold="True" />

                            <PagerStyle BackColor="PaleGoldenrod" ForeColor="DarkSlateBlue" HorizontalAlign="Center" />

                            <SelectedRowStyle BackColor="DarkSlateBlue" ForeColor="GhostWhite" />

                            <SortedAscendingCellStyle BackColor="#FAFAE7" />

                            <SortedAscendingHeaderStyle BackColor="#DAC09E" />

                            <SortedDescendingCellStyle BackColor="#E1DB9C" />

                            <SortedDescendingHeaderStyle BackColor="#C2A47B" />

                            <Columns>

                                <asp:TemplateField HeaderText="FirstName">

                                    <ItemTemplate>

                                        <asp:Label runat="server" ID="lblFName" Text='<%# Bind("FirstName") %>'></asp:Label></ItemTemplate>

                                </asp:TemplateField>

                                <asp:TemplateField HeaderText="LastName">

                                    <ItemTemplate>

                                        <asp:Label runat="server" ID="lblLName" Text='<%# Bind("LastName") %>'></asp:Label></ItemTemplate>

                                </asp:TemplateField>

                                <asp:TemplateField HeaderText="Gender">

                                    <ItemTemplate>

                                        <asp:RadioButtonList ID="RadioButtonList1" runat="server">

                                            <asp:ListItem Text="Male" Value="1"></asp:ListItem>

                                            <asp:ListItem Text="Female" Value="2"></asp:ListItem>

                                        </asp:RadioButtonList>

                                    </ItemTemplate>

                                </asp:TemplateField>

                            </Columns>

                        </asp:GridView>

                    </td>

                </tr>

            </table>

        </div>

    </center>

    </form>

</body>

</html>

Step 3:
The complete code of WebForm1.aspx.cs is as in the following:
 

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Data.SqlClient;

using System.Data;

namespace GridViewRadioButtonBindApp

{

    public partial class WebForm1 : System.Web.UI.Page

    {

        SqlConnection con = new SqlConnection("Data Source=WIN-KV3BO1RQQF7;Initial Catalog=Company;Integrated Security=True");

        protected void Page_Load(object sender, EventArgs e)

        {

            if (!IsPostBack) { con.Open();

                SqlCommand cmd = new SqlCommand("select FirstName, LastName, Gender from Employee", con);

                SqlDataAdapter da = new SqlDataAdapter(cmd);

                DataSet ds = new DataSet();

                da.Fill(ds);

                con.Close();

                GridView1.DataSource = ds;

                GridView1.DataBind();

            }

        }

        protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)

        {

            if (e.Row.RowType == DataControlRowType.DataRow)

            {

                int genderValue = (int)DataBinder.Eval(e.Row.DataItem, "Gender");

                RadioButtonList rb = (RadioButtonList)e.Row.FindControl("RadioButtonList1");

                rb.Items.FindByValue(genderValue.ToString()).Selected = true;

            }

        }

    }

}

Step 4: The output for the application is shown below:

Output2.png

I hope this article was useful for you.

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