How to check only one check box in gridview using ASP.NET

Question

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C#

protected void btnView_Click(object sender, EventArgs e)
        {
            foreach (GridViewRow row in GridLeaveApproved.Rows)
            {
                CheckBox ch = (CheckBox)row.FindControl("CheckBox1");
                if (ch.Checked)
                {
                    //Label lblleaveid = (Label)row.FindControl("lblLid");
                    //int lid = Convert.ToInt32(lblleaveid.Text);
                    //Label lbllid = (Label)row.FindControl("lblLId");
                    //int lid = Convert.ToInt32(lbllid.Text);
                    Label lblEid = (Label)row.FindControl("lblEmpId");
                    string eid = lblEid.Text;
                    cmd = new MySqlCommand("Select * from empleaves where EmpId=@eid ", conn);
                    cmd.Parameters.AddWithValue("@eid", eid);
                    MySqlDataAdapter da = new MySqlDataAdapter(cmd);
                    DataSet ds = new DataSet();
                    da.Fill(ds, "newleave");
                    GridLeavesView.DataSource = ds.Tables["newleave"];
                    GridLeavesView.DataBind();
                }
            }
            GridLeavesView.Visible = true;
        }

i want to check only one checkbox. i am trying to select two checkboxes show error message like(only select one checkbox) when after clicking View Button.

please help me friends..

What I have tried:

protected void btnView_Click(object sender, EventArgs e)
{
foreach (GridViewRow row in GridLeaveApproved.Rows)
{
CheckBox ch = (CheckBox)row.FindControl("CheckBox1");
if (ch.Checked)
{
//Label lblleaveid = (Label)row.FindControl("lblLid");
//int lid = Convert.ToInt32(lblleaveid.Text);
//Label lbllid = (Label)row.FindControl("lblLId");
//int lid = Convert.ToInt32(lbllid.Text);
Label lblEid = (Label)row.FindControl("lblEmpId");
string eid = lblEid.Text;
cmd = new MySqlCommand("Select * from empleaves where EmpId=@eid ", conn);
cmd.Parameters.AddWithValue("@eid", eid);
MySqlDataAdapter da = new MySqlDataAdapter(cmd);
DataSet ds = new DataSet();
da.Fill(ds, "newleave");
GridLeavesView.DataSource = ds.Tables["newleave"];
GridLeavesView.DataBind();
}
}
GridLeavesView.Visible = true;
}

Posted 24-May-16 2:38am

Member 11652153

Updated 24-May-16 3:10am

v2

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Comments

F-ES Sitecore 24-May-16 8:53am

Do you mean you *are* seeing that message? Or that you want to see that message? If you want to only process one checkbox do something like

foreach (GridViewRow row in GridLeaveApproved.Rows)
{
CheckBox ch = (CheckBox)row.FindControl("CheckBox1");
if (ch.Checked)
{
// your code

break; // this will exit the outer for loop
}
}

Member 11652153 24-May-16 9:07am

ok..but i want to see message.. like ((only select one checkbox)

Karthik_Mahalingam 24-May-16 9:13am

Always use Reply button, to post Comments/query to the user, else the User wont get notified.

CHeck Solution 2 and let me know if it helps.

F-ES Sitecore 24-May-16 9:37am

Define a "bool processed = false;" in your click event. Inside the "if (ch.Checked)" statement check if processed is true and if it is show a message and do a "break;". If it is false then set it to true and process the checkbox as normal.

2 solutions

Solution 1

You can also perform like this..

C#

foreach (DataGridViewRow row in GridLeaveApproved.Rows)
        {
            DataGridViewCheckBoxCell ch = (DataGridViewCheckBoxCell)row.Cells[1];
            if (ch.Selected == true)
            {
                //do code if it checked
            }
            else
            {
                //do code if it not checked
            }
        }

Posted 24-May-16 3:07am

ArjunSingh_as

Comments

Member 11652153 24-May-16 9:12am

what is DataGridViewCheckBoxCell ..
here i want one message after clicking two checkboxes in gridview when click the view button
message like (only select one checkbox)

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Karthik_Mahalingam · Accepted Answer · 2016-05-24T03:10:00

Since you have tagged Asp.net and C#, i am giving you the solution using c#.
and i hope you will be having a label to display the error message.

C#

protected void btnView_Click(object sender, EventArgs e)
       {
           lblMessage.Text = "";
           int count = 0;
           foreach (GridViewRow row in GridLeaveApproved.Rows)
           {
               CheckBox ch = (CheckBox)row.FindControl("CheckBox1");
               if (ch.Checked)
               {
                   count++;
                   if (count > 1)
                   {
                       lblMessage.Text = "Please select only one row";
                       return;
                   }
               }
           }

           foreach (GridViewRow row in GridLeaveApproved.Rows)
           {
               CheckBox ch = (CheckBox)row.FindControl("CheckBox1");
               if (ch.Checked)
               {
                   //Label lblleaveid = (Label)row.FindControl("lblLid");
                   //int lid = Convert.ToInt32(lblleaveid.Text);
                   //Label lbllid = (Label)row.FindControl("lblLId");
                   //int lid = Convert.ToInt32(lbllid.Text);
                   Label lblEid = (Label)row.FindControl("lblEmpId");
                   string eid = lblEid.Text;
                   cmd = new MySqlCommand("Select * from empleaves where EmpId=@eid ", conn);
                   cmd.Parameters.AddWithValue("@eid", eid);
                   MySqlDataAdapter da = new MySqlDataAdapter(cmd);
                   DataSet ds = new DataSet();
                   da.Fill(ds, "newleave");
                   GridLeavesView.DataSource = ds.Tables["newleave"];
                   GridLeavesView.DataBind();
               }
           }
           GridLeavesView.Visible = true;


       }