ASP.NET

DataTable dt = (DataTable)gv.DataSource;
int count = 0;
foreach (GridViewRow gv in gv1.Rows)
{
    CheckBox cb = (CheckBox)gv.FindControl("chkSelect");
    if (cb.Checked)
    {
        DataRow row = dt.Rows[count];
        //Take necessary values from row       
        count++;
    }
}

Arraylist arrID = new arraylist();
foreach (GridViewRow gv in gv1.Rows)
{
  CheckBox cb = (CheckBox)gv.FindControl("chkSelect");
  if (cb.Checked)
  {
    HiddenField hf = (HiddenField)gv.FindControl("HiddenFieldNames");
    arrID.add(hf.value);
  }
}

DataTable dbTable = QueryBackToDB(arrID);

Arraylist arrDataToQuery = GetAllTheIDWhenCheckboxIsChecked();


Datatable dtQueryResult = QueryResult(arrDataToQuery);
/*
in query result, you can query with the id with [IN] keyword
example : Select * From City Where CityID In ('1','2','3')
all you have to do is built algorithm to built string like ('1','2','3') from the arraylist that contain id.
*/


gvDontCareItsName.DataSource = dtQueryResult;
gvDontCareItsName.Databind();

Abhijit Jana wrote:

when you desgined any asp.net web page always try to use table .

Venkatesh Mookkan wrote:

Using tables are nowadays not recommended. Because tables uses nested tags which makes the loading time more that using SPANs & DIVs. The file size also more than the pages which you divs & spans for layouts.

N a v a n e e t h wrote:

True. But most of the programmers including me are bad in designing. Tables are easy way to implement.