How does the server/client access the checkbox in the gridview?

Client Access:

 

 

Function Findcheckbox ()
{
// Get target base & Child control.
VaR Targetbasecontrol = Document. getelementbyid ( ' <% = Gridview1.clientid %> ' );
VaR Targetchildcontrol =   " Chkbox1 " ;
// Get all the control of the type input in the base control.
VaR Inputs = Targetbasecontrol. getelementsbytagname ( " Input " );
// Checked/unchecked all the checkboxes in side the gridview.
For ( VaR N =   0 ; N < Inputs. length; ++ N)
{
If (Inputs [N]. Type =   ' Checkbox '   && Inputs [N]. Id. indexof (targetchildcontrol, 0 ) > =   0 )
{
//Write your code here
Alert ("I found check box:" +Inputs [N]. ID );
}
}
}

 

Server access (checkbox in the template column)

 

 

Public   Object Checkvaliddel ()
{
Int I;

Bool Valid =   False ;

For (I =   0 ; I <= Dgdata. Items. Count -   1 ; I ++ ) {
Datagriditem dgitem = Dgdata. Items (I );

Checkbox CHB = (Checkbox) dgitem. findcontrol ( " Chk1 " );
If (CHB ! =   Null ) & CHB. Checked) {

Valid= True;

ReturnValid;
}  

}  
}