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Get Asp.net Gridview Selected Row Values on Button click in C#

Aug 21, 2014
Introduction:

Here I will explain
how to add checkboxes in asp.net gridview and get gridview selected rows data on button click in asp.net and get checked rows data on button click and how to work with those checked rows in asp.net using c#, vb.net.
Description:
In previous articles I explained Create table dynamically in asp.net and bind to gridview, export gridview data to excel in asp.net, Group Gridview columns with header row in asp.net and many articles relating to asp.net, c#, vb.net, SQL server. Now I will explain how to add checkboxes to gridview and get gridview selected rows data on button click in asp.net.

First create one new web application and open your Default.aspx and write the following code


<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Get Checkbox Selected Rows in Asp.net Gridview</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:GridView AutoGenerateColumns="false" ID="gvDetails" CellPadding="5" runat="server">
<HeaderStyle BackColor="#df5015" Font-Bold="true" ForeColor="White" />
<Columns>
<asp:TemplateField HeaderText="Select">
<ItemTemplate>
<asp:CheckBox ID="chkDetails" runat="server" />
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="UserId">
<ItemTemplate>
<asp:Label id="lblUserid" runat="server" Text='<%#Eval("UserId") %>' />
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="UserName">
<ItemTemplate>
<asp:Label id="lblUsername" runat="server" Text='<%#Eval("Username") %>' />
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Education">
<ItemTemplate>
<asp:Label id="lblEducation" runat="server" Text='<%#Eval("Education") %>' />
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
</div>
<asp:Button ID="btngetdetails" Text="Get Selected Checkboxes" runat="server"
onclick="btngetdetails_Click" />
<br />
<b>Selected Values are:</b><asp:Label ID="lblselected" runat="server" />
</form>
</body>
</html>
Now in code behind file write the code like as shown below

C# Code


using System;
using System.Data;
using System.Web.UI.WebControls;

public partial class BindGridviewwithCheckboxes : System.Web.UI.Page
{
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.Rows.Add(1, "Suresh Dasari", "B.Tech");
dt.Rows.Add(2, "Rohini Dasari", "Msc");
dt.Rows.Add(3, "Madhav Sai", "MS");
dt.Rows.Add(4, "Praveen", "B.Tech");
dt.Rows.Add(6, "Sateesh", "MD");
dt.Rows.Add(7, "Mahesh Dasari", "B.Tech");
dt.Rows.Add(8, "Mahendra", "CA");
gvDetails.DataSource = dt;
gvDetails.DataBind();
}
protected void btngetdetails_Click(object sender, EventArgs e)
{
DataTable dt = new DataTable();
string str = "";
dt.Columns.AddRange(new DataColumn[2] { new DataColumn("UserId"), new DataColumn("Status") });
foreach (GridViewRow row in gvDetails.Rows)
{
if (row.RowType == DataControlRowType.DataRow)
{
CheckBox bf = (row.Cells[3].FindControl("chkDetails") as CheckBox);
string id = (row.Cells[0].FindControl("lblUserid") as Label).Text;

if (bf.Checked)
{
str = str+ id + ",";
}
}
}
str = str.Remove(str.Length - 1, 1);
lblselected.Text = str;
}
}
VB.NET Code


Imports System.Data
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
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.Rows.Add(1, "Suresh Dasari", "B.Tech")
dt.Rows.Add(2, "Rohini Dasari", "Msc")
dt.Rows.Add(3, "Madhav Sai", "MS")
dt.Rows.Add(4, "Praveen", "B.Tech")
dt.Rows.Add(6, "Sateesh", "MD")
dt.Rows.Add(7, "Mahesh Dasari", "B.Tech")
dt.Rows.Add(8, "Mahendra", "CA")
gvDetails.DataSource = dt
gvDetails.DataBind()
End Sub
Protected Sub btngetdetails_Click(ByVal sender As Object, ByVal e As EventArgs)
Dim dt As New DataTable()
Dim str As String = ""
dt.Columns.AddRange(New DataColumn(1) {New DataColumn("UserId"), New DataColumn("Status")})
For Each row As GridViewRow In gvDetails.Rows
If row.RowType = DataControlRowType.DataRow Then
Dim bf As CheckBox = TryCast(row.Cells(3).FindControl("chkDetails"), CheckBox)
Dim id As String = TryCast(row.Cells(0).FindControl("lblUserid"), Label).Text

If bf.Checked Then
str = (str & id) + ","
End If
End If
Next
str = str.Remove(str.Length - 1, 1)
lblselected.Text = str
End Sub
End Class
Now run above code and check the output that will be like as shown below

Output



Arkadeep De

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