How to delete records from the data list in asp.net c#.
In this article, I will explain how to delete the particular
image from the data list in asp.net c#.
Data Base (Sql Server)
USE [uploaddata]
GO
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE TABLE [dbo].[tab](
[Id] [int] IDENTITY(1,1) NOT NULL,
[ImageName] [nvarchar](max) NULL,
CONSTRAINT
[PK_tab] PRIMARY KEY
CLUSTERED
(
[Id] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS
= ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]
GO
Source Code:-
<%@
Page Language="C#" AutoEventWireup="true" CodeFile="datalist.aspx.cs" Inherits="datalist" %>
<!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>
<table>
<tr>
<td align="right"> Image Upload </td>
<td>
<asp:FileUpload ID="FileUpload1" runat="server" />
</td>
</tr>
<tr>
<td>
</td>
<td>
<asp:Button ID="btnupload" runat="server" Text="Upload"
OnClick="btnupload_Click"
/>
</td>
</tr>
<tr>
<td align="center" colspan="2">
<asp:DataList ID="dlImages" runat="server" RepeatColumns="4" CellPadding="4"
style="font-family: 'Times New
Roman', Times, serif" DataKeyField="Id"
ondeletecommand="dlImages_DeleteCommand">
<ItemTemplate>
<asp:ImageButton ID="ImageButton1" ImageUrl='<%# Bind("ImageName", "~/img/{0}") %>'
Width="182" Height="284"
runat="server"
/>
<br />
<asp:LinkButton ID="lnkDelete"
runat="server"
Text="Delete"
CommandName="Delete"
OnClientClick="return
confirm('Are you sure you want to delete selected image')"></asp:LinkButton>
</ItemTemplate>
<ItemStyle BorderColor="Brown" BorderStyle="dotted" BorderWidth="3px" HorizontalAlign="Center"
VerticalAlign="Bottom" />
</asp:DataList>
</td>
</tr>
</table>
</div>
</form>
</body>
</html>
C#:-
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.IO;
using System.Data;
public partial class datalist : System.Web.UI.Page
{
SqlConnection
con = new SqlConnection("server=NEERAJ-PC; uid=sa; Pwd=12345678;database=uploaddata");
protected void Page_Load(object
sender, EventArgs e)
{
if
(!IsPostBack)
{
BindDataList();
}
}
protected void BindDataList()
{
con.Open();
SqlCommand
command = new SqlCommand("SELECT Id,ImageName from tab", con);
SqlDataAdapter
da = new SqlDataAdapter(command);
DataTable
dt = new DataTable();
da.Fill(dt);
dlImages.DataSource = dt;
dlImages.DataBind();
con.Close();
}
protected void btnupload_Click(object
sender, EventArgs e)
{
try
{
string
filename = Path.GetFileName(FileUpload1.PostedFile.FileName);
FileUpload1.SaveAs(Server.MapPath("img/" + filename));
con.Open();
SqlCommand
cmd = new SqlCommand("Insert into tab(ImageName) values(@ImageName)",
con);
cmd.Parameters.AddWithValue("@ImageName", filename);
cmd.ExecuteNonQuery();
con.Close();
BindDataList();
}
catch (Exception ex)
{
Response.Write("<script>alert('Please select the image
!!')</script>");
}
}
protected void dlImages_DeleteCommand(object
source, DataListCommandEventArgs e)
{
int
imgId = Convert.ToInt32(dlImages.DataKeys[e.Item.ItemIndex]);
SqlCommand
cm = new SqlCommand("delete from tab where Id=@ID", con);
cm.Parameters.AddWithValue("@ID",imgId);
con.Open();
cm.ExecuteNonQuery();
con.Close();
BindDataList();
}
}
Output:-
How to delete records from the data list in asp.net c#.
Reviewed by NEERAJ SRIVASTAVA
on
9:21:00 PM
Rating:
Reviewed by NEERAJ SRIVASTAVA
on
9:21:00 PM
Rating:
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