how to select values frm gridview when checkbox is checked

I'm trying to send mails to selected users by selecting check box in grid view...

while debugging its not taking checkbox.checked=true....

kindly share your view and point out the mistake in codings...

source :

<%@ Page Language="C#" Debug="true" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>

subject
message

aspx.cs file...................................................................................

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Configuration;

using System.Data;

using System.Data.SqlClient;

using System.Net.Mail;

using System.Net;

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

{

Class1 obj = new Class1();

public string host, frommail, password;

protected void Page_Load(object sender, EventArgs e)

{

DataSet ds = obj.display();

GridView1.DataSource = ds;

GridView1.DataBind();

}

protected void btnsubmit_Click(object sender, EventArgs e)

{

MailMessage s = new MailMessage();

s.From = new MailAddress("[email protected]");

s.Subject = txtsubject.Text;

s.Body = txtmessage.Text;

foreach (GridViewRow row in GridView1.Rows)

{

if (row.RowType == DataControlRowType.DataRow)

{

CheckBox chk = (CheckBox)row.FindControl("CheckBox1");

{

if (chk.Checked==true)

{

string email = row.Cells[2].Text;

s.To.Add(email);

SmtpClient smtp = new SmtpClient();

smtp.Host = "smtp.gmail.com";

smtp.EnableSsl = true;

NetworkCredential p = new NetworkCredential();

smtp.UseDefaultCredentials = false;

smtp.Credentials = new System.Net.NetworkCredential("[email protected]", "******");

smtp.EnableSsl = true;

smtp.Send(s);

}

class file...........................................................................

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Configuration;

using System.Data;

using System.Data.SqlClient;

using System.Net.Mail;

using System.Net;

public class Class1

{

string s1 = ConfigurationManager.ConnectionStrings["pri"].ToString();

SqlCommand cmd = new SqlCommand();

public DataSet display()

{

using (SqlConnection con = new SqlConnection(s1))

{

cmd.Connection = con;

cmd.CommandType = CommandType.StoredProcedure;

cmd.CommandText = "sp_display";

con.Open();

SqlDataAdapter da = new SqlDataAdapter(cmd);

DataSet ds = new DataSet();

da.Fill(ds);

return ds;

}

2 Replies

Know the answer? Post it — somebody with the same question will find it here.

Brijendra Gautam12y ago
only if (!IsPostBack) required at the Page_load event.

protected void Page_Load(object sender, EventArgs e)
{
    if (!IsPostBack)
    {
    DataSet ds = obj.display();
    GridView1.DataSource = ds;
    GridView1.DataBind();
    }
}

This will solve your problem, no need to put autopostback="true" in checkbox.
Problem was when you clicked the button Page_load event occurs and then your gridview again bind with the dataset and causing checkboxes to initialize to default value and your checked option will get lost.
Nilesh Dhande12y ago
Hello
Your all code is correct just small change required
1. add not isposback on page load

protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
DataSet ds = obj.display();
GridView1.DataSource = ds;
GridView1.DataBind();
}
}

2. please add Autoposback true in checkbox

please do this