how to delete multiple records in data grid using checkboxes and delete button

u can delete data from datagrid by two ways
1. by using 3.5 method and using sqldata source which is very simple... but b y this way u can delete only one by one data.
2. method is to delte bulk of data..

for this u have applied checkbox list or u can put radiobutton list whatever u like...

just calculate the no of record on delete button..
and put foreach loop simple..

here is code to delete

foreach (GridViewRow row in GridView1.Rows)    \\ ur gridview id
            {
                if (row.RowType == DataControlRowType.DataRow)  \\ data in gridview
                {
                   if(((RadioButtonList)row.FindControl("RadioButtonList1")).SelectedText="yes") \\ur radiobuttonlist/checkbox control                   {
\\ put here delete command
                 }
             }
        }