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Wednesday, 18 May 2016

Gridview Auto Generate Row Number In Asp.Net Using C#.Net

5/18/2016 - By Pranav Singh 0

This article will show you how you can write code to generate gridview auto generated row number in asp.net using c#. In this I have bind the gridview to populate data in gridview.
So for this article first we will create a new asp.net application and add the below code in the .aspx page.

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="WebApplication7.WebForm1" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>Gridview Auto Generate Row Number In Asp.Net Using C#.Net</title>
</head>
<body>
    <form id="form1" runat="server">
        <div>
            <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False">
                <Columns>
                    <asp:TemplateField>
                        <HeaderTemplate>
                            Row No.
                        </HeaderTemplate>
                        <ItemTemplate>
                            <%#Container.DataItemIndex + 1 %>
                        </ItemTemplate>
                    </asp:TemplateField>
                    <asp:BoundField DataField="CountryName" HeaderText="Country Name" />
                    <asp:BoundField DataField="Population" HeaderText="Population" />
                    <asp:BoundField DataField="Code" HeaderText="Code" />
                </Columns>
            </asp:GridView>
        </div>
    </form>
</body>
</html>

Make the AutoGenerateColumns="False” in gridview.



In above code just check the template field section which is in bold letter. 


<asp:TemplateField>
                        <HeaderTemplate>
                            Row No.
                        </HeaderTemplate>
                        <ItemTemplate>
                            <%#Container.DataItemIndex + 1 %>
                        </ItemTemplate>
                    </asp:TemplateField>


In above code Container.DataItemIndex + 1 is responsible for displaying the auto generated row no inside the gridview. Now check he below code to bind the gridview.

using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace WebApplication7
{
    public partial class WebForm1 : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            DataTable dt = new DataTable();
            dt = GetCountryData();
            GridView1.DataSource = dt;
            GridView1.DataBind();
        }
        private DataTable GetCountryData()
        {
            DataTable dt = new DataTable();
            dt.Clear();
            dt.Columns.Add("CountryName");
            dt.Columns.Add("Population");
            dt.Columns.Add("Code");

            DataRow dataRow1 = dt.NewRow();
            dataRow1["CountryName"] = "India";
            dataRow1["Population"] = "125 Cr";
            dataRow1["Code"] = "IN";
            dt.Rows.Add(dataRow1);

            DataRow dataRow2 = dt.NewRow();
            dataRow2["CountryName"] = "Pakistan";
            dataRow2["Population"] = "50 Cr";
            dataRow2["Code"] = "PK";
            dt.Rows.Add(dataRow2);

            DataRow dataRow3 = dt.NewRow();
            dataRow3["CountryName"] = "United States";
            dataRow3["Population"] = "25 Cr";
            dataRow3["Code"] = "US";
            dt.Rows.Add(dataRow3);

            return dt;
        }
    }
}

In above code I have bind gridview with datatable. Now we have done run the application to check the output.

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