Introduction: Hello guys, in this article i will explain that how we can work with the rowcommand event of the gridview. This article will very helpful for the .net developers.

Implementation: Create a page named rw_commamnd.Place four textboxes and a button and a gridview. And set their id as txt_name,txt _age,txt_paswrd and txt_repswrd respectively.

Code for .aspx page:

head runat="server">

<title>Row command event</title>

</head>

<body>

<div>

<tr>

<td>

Name</td>

<td>

<asp:TextBox ID="txt_name" runat="server"></asp:TextBox>

</td>

</tr>

<tr>

<td >

Age</td>

<td>

<asp:TextBox ID="txt_age" runat="server"></asp:TextBox>

</td>

</tr>

<tr>

<td >

Password</td>

<td>

<asp:TextBox ID="txt_pswrd" runat="server" TextMode="Password"></asp:TextBox>

</td>

</tr>

<tr>

<td>

Retype_password</td>

<td>

<asp:TextBox ID="txt_repswrd" runat="server" TextMode="Password"></asp:TextBox>

</td>

</tr>

<tr>

<td>

&</td>

<td>

<asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="Button" />

</td>

</tr>

</table>

</div>

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False"

onrowcommand="GridView1_RowCommand" CellPadding="4" ForeColor="#333333"

GridLines="None">

<asp:TemplateField HeaderText="Name">

<asp:Label ID="Label1" runat="server" Text='<%# Eval("Name") %>'></asp:Label>

</ItemTemplate>

</asp:TemplateField>

<asp:TemplateField HeaderText="Age">

<asp:Label ID="Label2" runat="server" Text='<%# Eval("Age") %>'></asp:Label>

</ItemTemplate>

</asp:TemplateField>

<asp:TemplateField HeaderText="Login_status">

<%--here am placing the link button and set its commandargument a id and

set its commandname as abc and set text with the value that will come inside the

Login_status columnit can be

--%>

<asp:LinkButton ID="LinkButton2" runat="server"

CommandArgument='<%#Eval("id") %>' CommandName="abc"

Text='<%# Eval("Login_status") %>'></asp:LinkButton>

</ItemTemplate>

</asp:TemplateField>

<asp:TemplateField HeaderText="Password">

<asp:Label ID="Label4" runat="server" Text='<%# Eval("Password") %>'></asp:Label>

</ItemTemplate>

</asp:TemplateField>

<asp:TemplateField HeaderText="Retype_password" >

<asp:Label ID="Label5" runat="server" Text='<%# Eval("Retype_password") %>'></asp:Label>

</ItemTemplate>

</asp:TemplateField>

<asp:TemplateField HeaderText="delete">

<%--here am placing the link button and set its commandargument a id and

set its commandname as del

--%>

<asp:LinkButton ID="LinkButton3" runat="server"

CommandArgument='<%# Eval("id") %>' CommandName="del"

onclientclick="confirm return('Are you sure want to delete the current record')">delete</asp:LinkButton>

</ItemTemplate>

</asp:TemplateField>

</Columns>

</asp:GridView>

<br />

</form>

</body>

</html>

Code for aspx.cs page:

using System;

using System.Configuration;

using System.Data;

using System.Linq;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.HtmlControls;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Xml.Linq;

using System.Data.SqlClient;

public partial class _Default : System.Web.UI.Page

{

// here i am declaring some object for datatable,SqlConnection,SqlDataAdapter

SqlConnection con = new SqlConnection();

SqlDataAdapter adp;

DataTable dt;

SqlCommand cmd = new SqlCommand();

protected void Page_Load(object sender, EventArgs e)

{

// here i am declaring connectionstring

con.ConnectionString = ConfigurationManager.ConnectionStrings["con"].ConnectionString;

con.Open();

// here i am open the connection if the connection is closed

if (con.State == ConnectionState.Closed)

{

con.Open();

}

con.Close();

if (IsPostBack == false)

{

// here i am calling the function that will bind the gridview

grd_data();

}

private void grd_data()

{

// this function will bind the gridview dynamically

if (con.State == ConnectionState.Closed)

{

con.Open();

}

adp = new SqlDataAdapter("select * from tb_user order by id asc",con);

dt = new DataTable();

// here i m filling the dt with the values those will come inside the SqlDataAdapter adp

adp.Fill(dt);

adp.Dispose();

// here i am checking the rows those will come inside the dt

GridView1.DataSource = dt;

GridView1.DataBind();

con.Close();

}

protected void Button1_Click(object sender, EventArgs e)

{

// this code is used to insert the value inside the table

// here i am open the connection if the connection is closed

if (con.State == ConnectionState.Closed)

{

con.Open();

}

// here m declaring the sql query to inser the values

cmd.CommandText = "insert into tb_user values(@name,@age,default,@password,@retype_password)";

cmd.Connection = con;

// below m declaring the parameters for this insert query

cmd.Parameters.Add("@name", SqlDbType.VarChar, 50).Value = txt_name.Text;

cmd.Parameters.Add("@age", txt_age.Text);

cmd.Parameters.Add("@password", SqlDbType.VarChar, 50).Value = txt_pswrd.Text;

cmd.Parameters.Add("@retype_password", SqlDbType.VarChar, 50).Value = txt_repswrd.Text;

cmd.ExecuteNonQuery();

cmd.Dispose();

txt_name.Text = "";

txt_age.Text = "";

txt_pswrd.Text = "";

txt_repswrd.Text = "";

con.Close();

// here m calling the function named grd_bind after insertion this function will call

// and display the data with the new row that will insert presently

grd_data();

}

//GridView-properties-(Events)-Rowcommand-doubleor click

protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)

{

// this code for Rowcommand event

Int32 i;

// inside the i variable m putting the id that will come inside the CommandArgument

//inside the source code m binding the CommandArgument with the id

i = Convert.ToInt32(e.CommandArgument);

if (con.State == ConnectionState.Closed)

{

con.Open();

}

// here m checking the commandname of the linkbutton.

if (e.CommandName == "abc")

{

// if the commandname will abc then this condition will work

// here m selecting the login_status correspondence of this id

adp = new SqlDataAdapter("select login_status from tb_user where id=@id", con);

adp.SelectCommand.Parameters.AddWithValue("@id", i);

dt = new DataTable();

adp.Fill(dt);

adp.Dispose();

if (dt.Rows[0]["login_status"].ToString() == "No")

{

// if the login_status will no then this condition will works

// and here m updating the the login_status with the value yes

cmd = new SqlCommand("update tb_user set login_status=@login_status where id=@id", con);

cmd.Parameters.AddWithValue("@login_status", "Yes");

cmd.Parameters.AddWithValue("@id", i);

cmd.ExecuteNonQuery();

cmd.Dispose();

}

else

{

// if the login_status will yes then this condition will works

// and here m updating the the login_status with the value No

cmd = new SqlCommand("update tb_user set login_status=@login_status where id=@id", con);

cmd.Parameters.AddWithValue("@login_status", "No");

cmd.Parameters.AddWithValue("@id", i);

cmd.ExecuteNonQuery();

cmd.Dispose();

}

// here m checking the commandname of the linkbutton.

if (e.CommandName == "del")

{

// if the commandname will abc then this condition will work

// here m deleting the data from the column correspondence of this id

cmd = new SqlCommand("delete from tb_user where id=@id", con);

cmd.Parameters.AddWithValue("@id", i);

cmd.ExecuteNonQuery();

cmd.Dispose();

}

grd_data();

con.Close();

}

See output in this image:

See inside the gridview, login_status column. You can change the status after pressing the no. it changes no to yes ans yes to no

Sql Script for database:

/****** Object: Default [DF_tb_user_Login_status] Script Date: 12/04/2011 10:49:24 ******/

IF EXISTS (SELECT * FROM sys.default_constraints WHERE object_id = OBJECT_ID(N'[dbo].[DF_tb_user_Login_status]') AND parent_object_id = OBJECT_ID(N'[dbo].[tb_user]'))

Begin

ALTER TABLE [dbo].[tb_user] DROP CONSTRAINT [DF_tb_user_Login_status]

End

/****** Object: Table [dbo].[tb_user] Script Date: 12/04/2011 10:49:24 ******/

IF EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'[dbo].[tb_user]') AND type in (N'U'))

DROP TABLE [dbo].[tb_user]

/****** Object: Table [dbo].[tb_user] Script Date: 12/04/2011 10:49:24 ******/

SET ANSI_NULLS ON

SET QUOTED_IDENTIFIER ON

IF NOT EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'[dbo].[tb_user]') AND type in (N'U'))

BEGIN

CREATE TABLE [dbo].[tb_user](

[id] [int] IDENTITY(1,1) NOT NULL,

[Name] [varchar](50) COLLATE SQL_Latin1_General_CP1_CI_AS NULL,

[Age] [int] NULL,

[Login_status] [varchar](50) COLLATE SQL_Latin1_General_CP1_CI_AS NULL,

[Password] [varchar](50) COLLATE SQL_Latin1_General_CP1_CI_AS NULL,

[Retype_password] [varchar](50) COLLATE SQL_Latin1_General_CP1_CI_AS NULL,

CONSTRAINT [PK_tb_user] PRIMARY KEY CLUSTERED

(

[id] ASC

)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON)

)

END

SET IDENTITY_INSERT [dbo].[tb_user] ON

INSERT [dbo].[tb_user] ([id], [Name], [Age], [Login_status], [Password], [Retype_password]) VALUES (2, N'vikram', 30, N'Yes', N'vikram', N'vikram')

INSERT [dbo].[tb_user] ([id], [Name], [Age], [Login_status], [Password], [Retype_password]) VALUES (3, N'Bharat', 23, N'No', N'bharat', N'bharat')

SET IDENTITY_INSERT [dbo].[tb_user] OFF

/****** Object: Default [DF_tb_user_Login_status] Script Date: 12/04/2011 10:49:24 ******/

IF Not EXISTS (SELECT * FROM sys.default_constraints WHERE object_id = OBJECT_ID(N'[dbo].[DF_tb_user_Login_status]') AND parent_object_id = OBJECT_ID(N'[dbo].[tb_user]'))

Begin

ALTER TABLE [dbo].[tb_user] ADD CONSTRAINT [DF_tb_user_Login_status] DEFAULT ('No') FOR [Login_status]

End

Conclusion

Through this article, you have learned how to work rowcommand event inside the gridview.

Using ASP.NET

Friday, 18 November 2011

Row command event of the gridview

Introduction: Hello guys, in this article i will explain that how we can work with the rowcommand event of the gridview. This article will very helpful for the .net developers.

Implementation: Create a page named rw_commamnd.Place four textboxes and a button and a gridview. And set their id as txt_name,txt _age,txt_paswrd and txt_repswrd respectively.