c# - How to fit DataGridView width and height to its content? -


i have method create datagridview dynamically when shown up, width greater content width (total width of columns). height has not enough length meet length of rows.

i tried using method didn't work:

    datagridview createinputbox(int proc, int mac)         {             datagridview databox = new datagridview();             (int = 0; < mac; i++)             {                 databox.columns.add("col" + (i + 1), "m" + (i + 1));                 databox.columns[i].defaultcellstyle.alignment = datagridviewcontentalignment.middlecenter;                 databox.columns[i].sortmode = datagridviewcolumnsortmode.notsortable;             }             databox.rowtemplate.defaultheadercelltype = typeof(customheadercell);             databox.rowheaderswidthsizemode = datagridviewrowheaderswidthsizemode.autosizetoallheaders;             databox.rowheadersdefaultcellstyle.padding = new padding(2);             (int = 0; < proc; i++)             {                 databox.rows.add();                 databox.rows[i].headercell.value = "p" + (i + 1);             }             databox.defaultcellstyle.selectionbackcolor = color.lightgray;             databox.allowusertoaddrows = false;             databox.allowusertodeleterows = false;             databox.allowusertoordercolumns = false;             databox.autosizecolumnsmode = datagridviewautosizecolumnsmode.allcells;             databox.autosizerowsmode = datagridviewautosizerowsmode.allcells;              //this block doesn't work             var totalheight = databox.rows.getrowsheight(datagridviewelementstates.none);             var totalwidth = databox.columns.getcolumnswidth(datagridviewelementstates.none);             databox.width = totalwidth;             databox.height = totalheight;             //             return databox;         }     public class customheadercell : datagridviewrowheadercell     {         protected override size getpreferredsize(graphics graphics, datagridviewcellstyle cellstyle, int rowindex, size constraintsize)         {             var size1 = base.getpreferredsize(graphics, cellstyle, rowindex, constraintsize);             var value = string.format("{0}", this.datagridview.rows[rowindex].headercell.formattedvalue);             var size2 = textrenderer.measuretext(value, cellstyle.font);             var padding = cellstyle.padding;             return new size(size2.width + padding.left + padding.right, size1.height);         }         protected override void paint(graphics graphics, rectangle clipbounds, rectangle cellbounds, int rowindex, datagridviewelementstates cellstate, object value, object formattedvalue, string errortext, datagridviewcellstyle cellstyle, datagridviewadvancedborderstyle advancedborderstyle, datagridviewpaintparts paintparts)         {             base.paint(graphics, clipbounds, cellbounds, rowindex, cellstate, value, formattedvalue, errortext, cellstyle, advancedborderstyle, datagridviewpaintparts.background);             base.paintborder(graphics, clipbounds, cellbounds, cellstyle, advancedborderstyle);             textrenderer.drawtext(graphics, string.format("{0}", formattedvalue), cellstyle.font, cellbounds, cellstyle.forecolor);         }     }

result:

enter image description here

as can see width of datagridview control long. how can fit both dimension?

the main problem newly created datagridview has not finished internal layout before being added parent container , still report columns having width = 100.

one way fix call sizing function after dgv has been displayed:

void sizedgv(datagridview dgv) {     datagridviewelementstates states = datagridviewelementstates.none;     dgv.scrollbars = scrollbars.none;     var totalheight = dgv.rows.getrowsheight(states) + dgv.columnheadersheight;     totalheight += dgv.rows.count * 4  // correction need     var totalwidth = dgv.columns.getcolumnswidth(states) + dgv.rowheaderswidth;     dgv.clientsize = new size(totalwidth , totalheight ); }

enter image description here

note have fixed few things along way:

  • both width , height did not include headers
  • changing outer size ignores border. change clientsize instead.
  • before size can work need switch off scroll bars.

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