c# - Datagridview context menu always shows -1 in hittest -

i trying create context menu datagridview. had tried few samples here not able understand why below returns -1 row clicked. winforms , grid populated datatable. doing wrong here?

 datagridview.hittestinfo hit = dgvresults.hittest(e.x, e.y); 

my code:

private void dgvresults_cellmouseclick(object sender, datagridviewcellmouseeventargs e) {   if (e.columnindex >= 0 && e.rowindex >= 0 && e.button == mousebuttons.right)   {       datagridview.hittestinfo hit = dgvresults.hittest(e.x, e.y); \\ shows -1       if (hit.type == datagridviewhittesttype.cell)       {          dgvresults.currentcell = dgvresults[hit.columnindex, hit.rowindex];          cmsresults.show(dgvresults, e.x, e.y);       }   } } 

when use mouseclick event seem work, bit lost here

private void dgvresults_mouseclick(object sender, mouseeventargs e) {   if (e.button == mousebuttons.right)   {     int currentmouseoverrow = dgvresults.hittest(e.x, e.y).rowindex;     cmsresults.show(dgvresults, new point(e.x, e.y));    } } 

edit:

i got work below code.

thanks everyone

code worked me:

private void dgvresults_mouseclick(object sender, mouseeventargs e) {   if (e.button == mousebuttons.right)    {       int currentmouseoverrow = dgvresults.hittest(e.x, e.y).rowindex;       dgvresults.clearselection();       if (currentmouseoverrow >= 0) // show context menu strip if not negative       {           dgvresults.rows[currentmouseoverrow].selected = true;           cmsresults.show(dgvresults, new point(e.x, e.y));            row = currentmouseoverrow;        }    } } 

this normal behaviour x , y coordinates returned eventargs relative top left corner of hosting control:

• mouseeventargs return x/y coordinates relative datagridview control.
• datagridviewcellmouseeventargs return x/y coordinates relative datagridviewcell control.

hittest performed against datagridview control , converts provided x/y column/row indexes without modifications.

illustration below demonstrates idea (with blue - values returned mouseeventargs, green - datagridviewcellmouseeventargs)