Hello,I've a gridview control and inside a cell, i've put 3 radiobuttons under a same group. I'm not able to get which radio button is selected through checked property. As checked property is giving false always, when i check it with breakpoint. How can i get a the selected value from a group of radiobuttons. Thank You

Can you provide the code for the GridView, where you're databinding it, and the code where you're trying to get the radio button values?

using System;
using System.Collections;
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;
using _database;

public partial class takequiz : System.Web.UI.Page
{
    string str;
    string jobtitle;
    string[] choice = new string[200];
    int score=0,index=0,jobid;
    database db = new database();
    SqlDataReader reader;
    protected void Page_Load(object sender, EventArgs e)
    {
        jobtitle = Session["title"].ToString();
        str = "select jobid from job where jobtitle='" + jobtitle + "'";
        reader = db.data_read(str);
        if (reader.Read())
        {
            jobid = int.Parse(reader.GetSqlValue(0).ToString());
        }
        DataSet ds = new DataSet();
        str = "select slno,question,choice1,choice2,choice3 from questions where jobid=" + jobid + "";

        grdquestions.DataSource = db.data_set(str);
        grdquestions.DataBind();
    }

    protected void btnsubmit_Click(object sender, EventArgs e)
    {
        jobtitle = Session["title"].ToString();
        str = "select jobid from job where jobtitle='" + jobtitle + "'";
        reader = db.data_read(str);
        if (reader.Read())
        {
             jobid = int.Parse(reader.GetSqlValue(0).ToString());
        }

        foreach (GridViewRow r in grdquestions.Rows)

        {
            string opt;

            RadioButton radio1;
            RadioButton radio2;
            RadioButton radio3;

            radio1 = (RadioButton)r.FindControl("rdb1");
            radio2 = (RadioButton)r.FindControl("rdb2");
            radio3 = (RadioButton)r.FindControl("rdb3");

            if ( (radio1.Checked == true || radio2.Checked == true) || radio3.Checked == true) 
            {
                if (radio1.Checked == true)
                {
                   // choice[index++] = radio1.FindControl("rdb1").ToString();
                    opt = "choice1";
                    str = "select choice1 from questions where jobid="+jobid+"";
                    reader = db.data_read(str);
                    if (reader.Read())
                    {
                        choice[index++] = reader.GetSqlValue(0).ToString();
                        Label1.Text = reader.GetSqlValue(0).ToString();
                    }


                }
                else if (radio2.Checked == true)
                {
                    //choice[index++] = radio2.FindControl("rdb2").ToString();
                    opt = "choice2";
                    str = "select choice2 from questions where jobid=" + jobid + "";
                    reader = db.data_read(str);
                    if (reader.Read())
                    {
                        choice[index++] = reader.GetSqlValue(0).ToString();
                    }

                }
                else
                {
                    opt = "choice3";
                    str = "select choice3 from questions where jobid=" + jobid + "";
                    reader = db.data_read(str);
                    if (reader.Read())
                    {
                        choice[index++] = reader.GetSqlValue(0).ToString();
                    }
                    choice[index++] = radio2.FindControl("rdb3").ToString();
                }
            }
        }
        index=0;
        str="select answer from questions where jobid="+jobid+"";
        reader = db.data_read(str);
        while (reader.Read())
        {
            if (choice[index++] == reader.GetSqlValue(0).ToString())
                score++;
        }
        str = "insert into score (total) values (" + score + ")";
        db.database_command(str);
        Session["total"] = score;
        Response.Redirect("score.aspx");               
    }
}

Be sure that in the page load event you put the databinding of the gridview in a !IsPostBack block. Right now the values in the gridview are getting reset before the button's click event is executed because the page load event occurs before the click event during a postback.

commented: Thank You. This helped +0

no i m getting the same error. I have put the binding code in !IsPostBack but when i clicked on the radio button and while debugging it gives OBJECT REFERENCE NOT SET TO AN INSTANCE OF OBJECT.