Gridview Edit Delete Update

In this tutorial i will let you know about the Edit, Delete, Update functionality in Gridview using C#.In this we are using Gridview Events like Gridview_updating, Gridview_Deleteing, Gridview_CancelingEdit.

For this we start from creating a connection.How to create a connection in asp.net you can find that on following post here.

Design View:-

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<!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 runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false" 
            onrowcancelingedit="GridView1_RowCancelingEdit" 
            onrowdeleting="GridView1_RowDeleting" onrowediting="GridView1_RowEditing" 
            onrowupdating="GridView1_RowUpdating">
        <Columns>
        <asp:TemplateField HeaderText="ID">
        <ItemTemplate>
        <asp:Label ID="lid" runat="server" Text='<%#Eval("id") %>'>'> </asp:Label>
        </ItemTemplate>
        </asp:TemplateField>
         <asp:TemplateField HeaderText="Name">
        <ItemTemplate>
        <asp:Label ID="name" runat="server" Text='<%#Eval("name") %>'>'> </asp:Label>
        </ItemTemplate>
        <EditItemTemplate>
        <asp:TextBox ID="txtname" runat="server" Text='<%#Eval("name") %>'>' ></asp:TextBox>
        </EditItemTemplate>
        </asp:TemplateField>
         <asp:TemplateField HeaderText="Class">
        <ItemTemplate>
        <asp:Label ID="class" runat="server" Text='<%#Eval("class") %>'>'> </asp:Label>
        </ItemTemplate>
        <EditItemTemplate>
        <asp:TextBox ID="txtclass" runat="server" Text='<%#Eval("class") %>'>' ></asp:TextBox>
        </EditItemTemplate>
        </asp:TemplateField>
        <asp:TemplateField HeaderText="Action">
        <ItemTemplate>
        <asp:LinkButton ID="edit" Text="Edit" runat="server" CommandName="Edit"></asp:LinkButton>
        <asp:LinkButton ID="Delete" Text="Delete" runat="server" CommandName="Delete"></asp:LinkButton>
        </ItemTemplate>
        <EditItemTemplate>
        <asp:LinkButton ID="Update" Text="Update" runat="server" CommandName="Update"></asp:LinkButton>
        <asp:LinkButton ID="Cancel" Text="cancel" runat="server" CommandName="Cancel"></asp:LinkButton>
        </EditItemTemplate>
        </asp:TemplateField>
        </Columns>
        </asp:GridView>
    </div>
    </form>
</body>
</html>

Code View:-

using System;
using System.Collections.Generic;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;

public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!Page.IsPostBack)
        {

            binddata();
        }
    }

    public void binddata()
    {
        string strcon = ConfigurationManager.ConnectionStrings["con"].ConnectionString;
        SqlConnection conn = new SqlConnection(strcon);
        conn.Open();
        string strquery = "select id,name,class from flatfile_logged";
        SqlCommand cmd = new SqlCommand(strquery,conn);
        SqlDataAdapter da = new SqlDataAdapter(cmd);
        DataSet ds = new DataSet();
        da.Fill(ds);
        GridView1.DataSource = ds;
        GridView1.DataBind();
        conn.Close();
    }


    protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
    {
        string lid = ((Label)GridView1.Rows[e.RowIndex].FindControl("lid")).Text;
        string strcon = ConfigurationManager.ConnectionStrings["con"].ConnectionString;
        SqlConnection conn = new SqlConnection(strcon);
        conn.Open();
        String strsession1 = "delete from flatfile_logged where id='"+lid+"'";
        SqlCommand cmd = new SqlCommand(strsession1, conn);
        cmd.ExecuteNonQuery();
        conn.Close();
        binddata();
    }
    protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
    {
        string lid = ((Label)GridView1.Rows[e.RowIndex].FindControl("lid")).Text;

        string name = ((TextBox)GridView1.Rows[e.RowIndex]
                           .FindControl("txtname")).Text;
        string class1 = ((TextBox)GridView1.Rows[e.RowIndex]
                           .FindControl("txtclass")).Text;
        string strcon = ConfigurationManager.ConnectionStrings["con"].ConnectionString;
        SqlConnection conn = new SqlConnection(strcon);
        conn.Open();
        String strsession = "update flatfile_logged set name='" + name.ToString() + "', class ='" + class1.ToString() + "' where id='" + lid + "'";
        SqlCommand cmd = new SqlCommand(strsession, conn);
        cmd.ExecuteNonQuery();
        GridView1.EditIndex = -1;
        conn.Close();
        binddata();

    }
    protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
    {
        GridView1.EditIndex = -1;
        binddata();
    }
    protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
    {
        GridView1.EditIndex = e.NewEditIndex;
        binddata();
    }
}