winforms - how to create a custom DataGridViewComboBoxCell with floating label on it -

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i want have 2 controls in same datagridview column.

i want customize datagridviewcomboboxcell show values of selected value , on floating label text. in past able checkbox , label problem datagridviewcomboboxcell comes out empty datasource when override paint event.

i tried assign datasource again after used paint event although see values in datagridviewcomboboxcell , label showing right value, infinite loop see gui blinking constantly.

10x help.

the code following:

*when form loads

mydgvcheckboxcolumn col = new mydgvcheckboxcolumn();         col.datapropertyname = "value";         col.datasource = list;         col.displaymember = "yes";         col.valuemember = "value";          col.defaultcellstyle.alignment = datagridviewcontentalignment.middlecenter;         this.datagridview1.columns.add(col);         this.datagridview1.rowcount = 50;

the class generic list:

public class checkthis {     public string yes { get; set; }     public string value { get; set; }      public checkthis()     {         yes = "gggg";         value = "1";     } }

the code custom datagridviewcomboboxcell (i used similar example in past site)

public class mydgvcheckboxcolumn : datagridviewcomboboxcolumn {     private string label;      public string label     {                 {             return label;         }         set         {             label = value;         }     }      public override datagridviewcell celltemplate     {                 {             return new mydgvcheckboxcell();         }     } }  public class mydgvcheckboxcell : datagridviewcomboboxcell {     private string label;      public string label     {                 {             return label;         }         set         {             label = value;         }      }      protected override void paint(graphics graphics, rectangle clipbounds, rectangle cellbounds, int rowindex, datagridviewelementstates elementstate, object value, object formattedvalue, string errortext, datagridviewcellstyle cellstyle, datagridviewadvancedborderstyle advancedborderstyle, datagridviewpaintparts paintparts)     {          // base paint implementation paints check box         base.paint(graphics, clipbounds, cellbounds, rowindex, elementstate, value, formattedvalue, errortext, cellstyle, advancedborderstyle, paintparts);          // check box bounds: content bounds         rectangle contentbounds = this.getcontentbounds(rowindex);          // compute location want paint string.         point stringlocation = new point();         stringlocation.y = cellbounds.y + 30;          stringlocation.x = cellbounds.x + contentbounds.bottom;           // paint string.         var res = false;         mydgvcheckboxcolumn col = (mydgvcheckboxcolumn)this.owningcolumn;         col.datasource = list;         col.displaymember = "yes";         col.valuemember = "value";                   this.label = "customer not appear";           graphics.drawstring(         this.label, new font("arial", 6, fontstyle.bold), system.drawing.brushes.red, stringlocation);      }       public object list { get; set; } }


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