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Delete Multiple Rows in Gridview using Checkbox in Asp.net in C#, VB.NET

Dec 1, 2014
Introduction

Here I will explain how to delete multiple rows in
gridview using checkbox in asp.net in c# , vb.net with confirmation message or delete multiple rows or records from gridview using checkbox selection with confirmation in asp.net using c# , vb.net.

Description:
  
In previous articles I explained
Get gridview selected row cell value in asp.net, Get Controls inside of gridview in asp.net, Bind data to textbox in gridview in asp.net, export gridview data to excel in asp.net using c# , export gridview data to pdf in asp.net using c# and many articles relating to gridview, asp.net, c#,vb.net and jQuery. Now I will explain how to delete multiple rows in gridview with checkbox selection in asp.net using c# , vb.net with confirmation message.

Before implement this example first design one table UserDetails in your database as shown below

Column Name
Data Type
Allow Nulls
UserId
Int(IDENTITY=TRUE)
Yes
UserName
varchar(50)
Yes
FirstName
varchar(50)
Yes
LastName
varchar(50)
Yes
Once table created in database enter some dummy data to test application after that write the following code in your aspx page 


<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>how to delete Multiple Rows from gridview in asp.net using checkbox</title>
<script type="text/javascript">
function Confirmationbox() {
var result = confirm('Are you sure you want to delete selected User(s)?');
if (result) {
return true;
}
else {
return false;
}
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:GridView ID="gvDetails" DataKeyNames="UserId" AutoGenerateColumns="false" CellPadding="5" runat="server">
<Columns>
<asp:TemplateField>
<ItemTemplate>
<asp:CheckBox ID="chkSelect" runat="server" />
</ItemTemplate>
</asp:TemplateField>
<asp:BoundField HeaderText="UserId" DataField="UserId" />
<asp:BoundField HeaderText="UserName" DataField="UserName" />
<asp:BoundField HeaderText="FirstName" DataField="FirstName" />
<asp:BoundField HeaderText="LastName" DataField="LastName" />
</Columns>
<HeaderStyle BackColor="#df5015" Font-Bold="true" ForeColor="White" />
</asp:GridView>
<asp:Button ID="btnDelete" Text="Delete Selected Records" runat="server" Font-Bold="true" OnClientClick="javascript:return Confirmationbox();" onclick="btnDelete_Click" />
</div>
</form>
</body>
</html>
Now open code behind file and write the following code

C# Code


using System;
using System.Data;
using System.Data.SqlClient;
using System.Web.UI;
using System.Web.UI.WebControls;
public partial class DeleteGridviewRows : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
BindUserDetails();
}
}
protected void BindUserDetails()
{
DataTable dt = new DataTable();
using (SqlConnection con = new SqlConnection("Data Source=SureshDasari;Integrated Security=true;Initial Catalog=MySampleDB"))
{
con.Open();
SqlCommand cmd = new SqlCommand("Select * from UserDetails", con);
SqlDataAdapter da = new SqlDataAdapter(cmd);
da.Fill(dt);
con.Close();
}
gvDetails.DataSource = dt;
gvDetails.DataBind();
}
protected void btnDelete_Click(object sender, EventArgs e)
{
foreach (GridViewRow gvrow in gvDetails.Rows)
{
//Finiding checkbox control in gridview for particular row
CheckBox chkdelete = (CheckBox)gvrow.FindControl("chkSelect");
//Condition to check checkbox selected or not
if (chkdelete.Checked)
{
//Getting UserId of particular row using datakey value
int usrid = Convert.ToInt32(gvDetails.DataKeys[gvrow.RowIndex].Value);
using (SqlConnection con = new SqlConnection("Data Source=SureshDasari;Integrated Security=true;Initial Catalog=MySampleDB"))
{
con.Open();
SqlCommand cmd = new SqlCommand("delete from UserDetails where UserId=" + usrid, con);
cmd.ExecuteNonQuery();
con.Close();
}
}
}
BindUserDetails();
}
}
VB.NET


Imports System.Data
Imports System.Data.SqlClient
Imports System.Web.UI
Imports System.Web.UI.WebControls
Partial Class VBCode
Inherits System.Web.UI.Page
Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs) Handles Me.Load
If Not IsPostBack Then
BindUserDetails()
End If
End Sub
Protected Sub BindUserDetails()
Dim dt As New DataTable()
Using con As New SqlConnection("Data Source=SureshDasari;Integrated Security=true;Initial Catalog=MySampleDB")
con.Open()
Dim cmd As New SqlCommand("Select * from UserDetails", con)
Dim da As New SqlDataAdapter(cmd)
da.Fill(dt)
con.Close()
End Using
gvDetails.DataSource = dt
gvDetails.DataBind()
End Sub
Protected Sub btnDelete_Click(ByVal sender As Object, ByVal e As EventArgs)
For Each gvrow As GridViewRow In gvDetails.Rows
'Finiding checkbox control in gridview for particular row
Dim chkdelete As CheckBox = DirectCast(gvrow.FindControl("chkSelect"), CheckBox)
'Condition to check checkbox selected or not
If chkdelete.Checked Then
'Getting UserId of particular row using datakey value
Dim usrid As Integer = Convert.ToInt32(gvDetails.DataKeys(gvrow.RowIndex).Value)
Using con As New SqlConnection("Data Source=SureshDasari;Integrated Security=true;Initial Catalog=MySampleDB")
con.Open()
Dim cmd As New SqlCommand("delete from UserDetails where UserId=" & usrid, con)
cmd.ExecuteNonQuery()
con.Close()
End Using
End If
Next
BindUserDetails()
End Sub
End Class
Demo

Delete Multiple Rows in Gridview using Checkbox in Asp.net in C#, VB.NET


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2 comments :

Santosh Kumar said...

Very Nice

Anonymous said...

Getting Error : Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index

"int usrid = Convert.ToInt32(GridView1.DataKeys[gvrow.RowIndex].Value);"

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