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03 April, 2013

Get Gridview Row Values When Checkbox Selected in Asp.net

Introduction:

Here I will explain how to get checkbox selected gridview row values in asp.net using C# and VB.NET or get row values from gridview when checkbox selected in asp.net using C# and VB.NET.

Description:

In previous articles I explained Asp.net Interview questions, Export Gridview data to PDF, Send values from one page to another page using QueryString, Joins in SQL Server, Highlight Gridview records based on search and many articles relating to Gridview, SQL, jQuery,asp.net, C#,VB.NET. Now I will explain how to get row values from gridview when checkbox selected asp.net using C# and VB.NET.

To get checkbox selected row values from gridview we need to write the code like this

C# Code


foreach(GridViewRow  gvrow in gvDetails.Rows)
{
CheckBox chk = (CheckBox)gvrow.FindControl("chkSelect");
if (chk != null & chk.Checked)
{
str += gvDetails.DataKeys[gvrow.RowIndex].Value.ToString() + ',';
strname += gvrow.Cells[2].Text+',';
}
}
VB.NET Code


For Each gvrow As GridViewRow In gvDetails.Rows
Dim chk As CheckBox = DirectCast(gvrow.FindControl("chkSelect"), CheckBox)
If chk IsNot Nothing And chk.Checked Then
str += gvDetails.DataKeys(gvrow.RowIndex).Value.ToString() + ","c
strname += gvrow.Cells(2).Text & ","c
End If
Next
If you want to see complete example we need to write the following code in aspx page


<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Get Checkbox Selected Row Values from Gridview in Asp.net</title>
</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="Education" DataField="Education" />
<asp:BoundField HeaderText="Location" DataField="Location" />
</Columns>
<HeaderStyle BackColor="#df5015" Font-Bold="true" ForeColor="White" />
</asp:GridView>
<asp:Button ID="btnProcess" Text="Get Selected Records" runat="server"
Font-Bold="true" onclick="btnProcess_Click" /><br />
<asp:Label ID="lblmsg" runat="server" />
</div>
</form>
</body>
</html>
Now in code behind add the following namespaces

C# Code


using System;
using System.Data;
using System.Data.SqlClient;
using System.Web.UI.WebControls;
Now add below code in code behind


protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
BindGridviewData();
}
}
protected void BindGridviewData()
{
DataTable dt = new DataTable();
dt.Columns.Add("UserId", typeof(Int32));
dt.Columns.Add("UserName", typeof(string));
dt.Columns.Add("Education", typeof(string));
dt.Columns.Add("Location", typeof(string));
DataRow dtrow = dt.NewRow();    // Create New Row
dtrow["UserId"] = 1;            //Bind Data to Columns
dtrow["UserName"] = "SureshDasari";
dtrow["Education"] = "B.Tech";
dtrow["Location"] = "Chennai";
dt.Rows.Add(dtrow);
dtrow = dt.NewRow();               // Create New Row
dtrow["UserId"] = 2;               //Bind Data to Columns
dtrow["UserName"] = "MadhavSai";
dtrow["Education"] = "MBA";
dtrow["Location"] = "Nagpur";
dt.Rows.Add(dtrow);
dtrow = dt.NewRow();              // Create New Row
dtrow["UserId"] = 3;              //Bind Data to Columns
dtrow["UserName"] = "MaheshDasari";
dtrow["Education"] = "B.Tech";
dtrow["Location"] = "Nuzividu";
dt.Rows.Add(dtrow);
gvDetails.DataSource = dt;
gvDetails.DataBind();
}
protected void btnProcess_Click(object sender, EventArgs e)
{
string str = string.Empty;
string strname = string.Empty;
foreach(GridViewRow  gvrow in gvDetails.Rows)
{
CheckBox chk = (CheckBox)gvrow.FindControl("chkSelect");
if (chk != null & chk.Checked)
{
str += gvDetails.DataKeys[gvrow.RowIndex].Value.ToString() + ',';
strname += gvrow.Cells[2].Text+',';
}
}
str= str.Trim(",".ToCharArray());
strname = strname.Trim(",".ToCharArray());
lblmsg.Text = "Selected UserIds: <b>" + str + "</b><br/>" + "Selected UserNames: <b>" + strname+"</b>";
}
VB.NET Code


Imports System.Data
Imports System.Data.SqlClient
Imports System.Web.UI.WebControls
Partial Class VBCode
Inherits System.Web.UI.Page
Protected Sub Page_Load(sender As Object, e As EventArgs) Handles Me.Load
If Not IsPostBack Then
BindGridviewData()
End If
End Sub
Protected Sub BindGridviewData()
Dim dt As New DataTable()
dt.Columns.Add("UserId", GetType(Int32))
dt.Columns.Add("UserName", GetType(String))
dt.Columns.Add("Education", GetType(String))
dt.Columns.Add("Location", GetType(String))
Dim dtrow As DataRow = dt.NewRow()
' Create New Row
dtrow("UserId") = 1
'Bind Data to Columns
dtrow("UserName") = "SureshDasari"
dtrow("Education") = "B.Tech"
dtrow("Location") = "Chennai"
dt.Rows.Add(dtrow)
dtrow = dt.NewRow()
' Create New Row
dtrow("UserId") = 2
'Bind Data to Columns
dtrow("UserName") = "MadhavSai"
dtrow("Education") = "MBA"
dtrow("Location") = "Nagpur"
dt.Rows.Add(dtrow)
dtrow = dt.NewRow()
' Create New Row
dtrow("UserId") = 3
'Bind Data to Columns
dtrow("UserName") = "MaheshDasari"
dtrow("Education") = "B.Tech"
dtrow("Location") = "Nuzividu"
dt.Rows.Add(dtrow)
gvDetails.DataSource = dt
gvDetails.DataBind()
End Sub
Protected Sub btnProcess_Click(sender As Object, e As EventArgs)
Dim str As String = String.Empty
Dim strname As String = String.Empty
For Each gvrow As GridViewRow In gvDetails.Rows
Dim chk As CheckBox = DirectCast(gvrow.FindControl("chkSelect"), CheckBox)
If chk IsNot Nothing And chk.Checked Then
str += gvDetails.DataKeys(gvrow.RowIndex).Value.ToString() + ","c
strname += gvrow.Cells(2).Text & ","c
End If
Next
str = str.Trim(",".ToCharArray())
strname = strname.Trim(",".ToCharArray())
lblmsg.Text = "Selected UserIds: <b>" & str & "</b><br/>" & "Selected UserNames: <b>" & strname & "</b>"
End Sub
End Class
Demo

 
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