how to get check box checked rows from grid view in asp.net using c#

In this asp.net web programming tutorial we will learn that how to get check box checked rows values in asp.net using c#

For example we have 10 rows on our web page with check box in a grid view and we need only five rows to perform some action (i.e we want to delete those 5 records). with the help of below example code we can select our required rows to perform some action.

DataTable dtGetStTable = (DataTable)ViewState["dtNewStudents"]; 

//Looping throgh Grid and deleting row after finding the checked row
for (int i = dtGetStTable.Rows.Count - 1; i > -1; i--)
{
    GridViewRow row = GridView1.Rows[i];
    bool isChecked = ((CheckBox)row.FindControl("CheckBox1")).Checked;
 
    if (isChecked)
    {
        try
        {
            string RollNo = dtGetStTable.Rows[i]["RollNo"].ToString();
            string Class = dtGetStTable.Rows[i]["Class"].ToString();
            string Division = dtGetStTable.Rows[i]["Division"].ToString();
            //Deleting the Reocrd from DataBase
            TotalRecordDeleted += objSRE.DeleteTheSelectedRecord(RollNo, Class, Division);
 
            dtGetStTable.Rows[i].Delete();
            dtGetStTable.AcceptChanges();
        }
        catch (Exception ex)
        {
 
            //throw;
        }
    }
}