Introduction:
In this article I will explain
how to delete row in gridview on Row_Command Event of gridview
.
Add a gridview on webpage and
add columns which we want to show on the webpage using boundfields of gridview.
Now add Template field and add one link button inside template field. Set
command-name and command argument. Bind gridview with data from database.
Now use GridView1_RowCommand
event of the grid
view and also fire RowDeleteing event to handle delete command. Write the code
in RowCommand event to delete record.
Implementation:
Follow
following steps
1.
Create a database i.e. “Blog”. Then create a table “Student_Info”.
Column Name
|
Datatype
|
Student_id
|
Int(Primary Key. So set Is
Identity=True)
|
Student_Name
|
Varchar(500)
|
Age
|
int
|
Class
|
Varchar(50)
|
2. Now insert some data in this table using “insert”
command.
INSERT INTO student_info(Student_Name,Age,Class) VALUES('Akhsay',12, 'first')
INSERT INTO student_info(Student_Name,Age,Class) VALUES('Raghav',25, 'M.Sc')
INSERT INTO student_info(Student_Name,Age,Class) VALUES('aksht', 23, 'Bsc')
INSERT INTO student_info(Student_Name,Age,Class) VALUES('ankit', 23, 'MBA')
INSERT INTO student_info(Student_Name,Age,Class) VALUES('anil', 23, 'MCA')
|
3. Create Connection: Now create
connection in webcofig file as given
below.
<connectionStrings>
<add name="con" connectionString="Data
Source=localhost; Initial Catalog= Blog; Integrated Security=true;" providerName="System.Data.SqlClient"/>
</connectionStrings>
|
4. ASP.Net Page design:
Add gridview control on the webpage
<asp:GridView ID="GridView1"
runat="server"
AutoGenerateColumns="False"
BackColor="White"
BorderColor="#CCCCCC"
BorderStyle="None"
BorderWidth="1px"
CellPadding="3"
Width="270px"
onrowcommand="GridView1_RowCommand"
onrowdeleting="GridView1_RowDeleting">
<Columns>
<asp:BoundField DataField="Student_name" HeaderText="Student Name" />
<asp:BoundField DataField="Age"
HeaderText="Age"
/>
<asp:BoundField DataField="Class"
HeaderText="Class"
/>
<asp:TemplateField HeaderText="Delete"
ShowHeader="False">
<ItemTemplate>
<asp:LinkButton ID="lnkDelete"
runat="server"
CausesValidation="False"
CommandName="Delete"
OnClientClick="javascript:
return confirm('Do you want to delete this record?')" CommandArgument='<%#bind("Student_id") %>' Text="Delete"></asp:LinkButton>
</ItemTemplate>
</asp:TemplateField>
</Columns>
<FooterStyle
BackColor="White"
ForeColor="#000066"
/>
<HeaderStyle
BackColor="#006699"
Font-Bold="True"
ForeColor="White"
/>
<PagerStyle
BackColor="White"
ForeColor="#000066"
HorizontalAlign="Left"
/>
<RowStyle
ForeColor="#000066"
/>
<SelectedRowStyle BackColor="#669999" Font-Bold="True" ForeColor="White" />
<SortedAscendingCellStyle
BackColor="#F1F1F1"
/>
<SortedAscendingHeaderStyle
BackColor="#007DBB"
/>
<SortedDescendingCellStyle
BackColor="#CAC9C9"
/>
<SortedDescendingHeaderStyle
BackColor="#00547E"
/>
</asp:GridView>
|
5. ASP.NET code behind
File using C#:
In code behind, add following code:
using System.Data;
using System.Data.SqlClient;
using System.Configuration;
|
Now Fetch data and bIND TO
GRIDVIEW
//Fetch data
from database and bind to gridview
public void Bind_grid()
{
SqlConnection
con = new SqlConnection(ConfigurationManager.ConnectionStrings["con"].ConnectionString);
if
(con.State == ConnectionState.Open)
{
con.Close();
}
con.Open();
DataTable
dt = new DataTable();
SqlDataAdapter
dataadapater = new SqlDataAdapter("Select * from student_info", con);
dataadapater.Fill(dt);
GridView1.DataSource = dt;
GridView1.DataBind();
}
}
|
Now Delete Record on RowCommand Event: Also
use event GridView1_RowDeleting to
handle delete command
protected void GridView1_RowCommand(object
sender, GridViewCommandEventArgs e)
{
int
studentid =Convert.ToInt32(
e.CommandArgument.ToString());
if
(e.CommandName =="Delete")
{
if
(con.State == ConnectionState.Open)
{
con.Close();
}
con.Open();
SqlCommand
cmd = new SqlCommand();
cmd.Connection = con;
cmd.CommandText = "Delete from student_Info where student_id="
+ studentid + "";
cmd.ExecuteNonQuery();
cmd.Dispose();
con.Close();
Bind_grid();
}
}
protected
void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs
e)
{
}
|
VB.NET code behind file:
In code behind, add following code:
Imports System.Data
Imports System.Data.SqlClient
Imports System.Configuration
|
Now Fetch data and bIND TO GRIDVIEW:
Partial Public
Class gridview
Inherits
System.Web.UI.Page
Protected
Sub Page_Load(sender As
Object, e As EventArgs)
If Not IsPostBack Then
Bind_grid()
End If
End Sub
'Fetch data
from database and bind to gridview
Public Sub Bind_grid()
Dim
con As New
SqlConnection(ConfigurationManager.ConnectionStrings("con").ConnectionString)
If
con.State = ConnectionState.Open Then
con.Close()
End If
con.Open()
Dim
dt As New
DataTable()
Dim
dataadapater As New
SqlDataAdapter("Select * from student_info",
con)
dataadapater.Fill(dt)
GridView1.DataSource = dt
GridView1.DataBind()
End Sub
End Class
|
Now Write Following Code on gridview_Rowcommand
event to delete Record:
Protected Sub
GridView1_RowCommand(sender As Object, e As GridViewCommandEventArgs)
Dim
studentid As Integer
= Convert.ToInt32(e.CommandArgument.ToString())
If
e.CommandName = "Delete" Then
If
con.State = ConnectionState.Open Then
con.Close()
End If
con.Open()
Dim
cmd As New
SqlCommand()
cmd.Connection = con
cmd.CommandText = "Delete from student_Info where student_id="
+ studentid + ""
cmd.ExecuteNonQuery()
cmd.Dispose()
con.Close()
Bind_grid()
End If
End Sub
Protected Sub
GridView1_RowDeleting(sender As Object, e As GridViewDeleteEventArgs)
End Sub
|
Demo:
Use this code, create your own
application and check result. You can use this code in any application by
customizing it. If you have any doubt, you can ask by commenting in comment
section.
