This article will help you if you wish to color cells of Gridview and learn how to access cell values.

This article is all about how to set or change the background \color of the selected row of ASP.Net GridView programmatically.
Here we go with the cs file code
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
namespace gridcolor {
    public partial class WebForm1: System.Web.UI.Page {
        protected void Page_Load(object sender, EventArgs e) {
            DataTable dt = new DataTable();
            dt.Columns.add("Hobbies");
            //here only one column for easy understanding
            dt.Rows.add("I love C# corner")
            mygrid.datasource = dt;
            mygrid.databind();
            //for perticular cell //here it has only 1 cell (0,0)
            myGrid.Rows[i].Cells[j].Style.BackColor = system.drawing.color.Red;
            //incase you want to fill all rows
            for (int i = 0; i < myGrid.Rows.Count; i++) {
                for (int j = 0; j < myGrid.Rows[i].Cells.Count; j++) {
                    myGrid.Rows[i].Cells[j].Style.BackColor = /*color you want*/
                }
            }
        }
    }
}

Now a brief look to my aspx

page code
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
    <style type="text/css">
        body
        {
            font-family: Arial;
            font-size: 10pt;
        }
    </style>
</head>
<body>
    <form id="form1" runat="server">
<asp:GridView ID="myGrid" runat="server" AutoGenerateColumns="false" >
    <Columns>
        <asp:BoundField DataField="Hobbies" HeaderText="Hobbies" ItemStyle-Width="150" />


    </Columns>
</asp:GridView>
    </form>
</body>
</html>

Hope you would easily understand the tutorial :-)
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