Displays text, icons, and tree structures in cells of the winform datagridview.

• Datagridview in a tree structure: customizing the datagridview to support expanding/collapsing (Ala treegridview) datagridview
  • Treegridview revised version:

    Some people reported problems actually running the treegridview sample, so I 've recompiled it on an RTM build machine (previously I was using the latest internal vs build ). you can get the new version (that also includes release & debug binaries prebuilt) here: http://www.windowsforms.net/blogs/markrideout/TreeGridViewRebuilt.zip

 

• Text and icons are displayed simultaneously in cells.

The datagridview control does not have any built-in support for showing an icon and text in the same cell. through the different painting customization events, such as the cellpaint event, you can easily display an icon next to the text in the cell.

The following example extends the datagridviewtextcolumn and cell to paint an image next to the text. the sample uses the maid. padding property to adjust the text location and overrides the paint method to paint an icon. this sample can be simplified by handling the cellpainting event and other Ming similar code.

 Using  System;
  Using  System. Collections. Generic;
  Using  System. LINQ;
  Using  System. text;
  Using System. Windows. forms;
  Using  System. drawing;

  Namespace  Jrtgenerator. Utility
{
  Public     Class  Textandimagecolumn: maid
{
  Private  Image imagevalue;
  Private Size imagesize;
  Public  Textandimagecolumn ()
{
  This  . Celltemplate  =     New  Textandimagecell ();
}

  Public    Override     Object  Clone ()
{
Textandimagecolumn C  =     Base  . Clone ()  As  Textandimagecolumn;
C. imagevalue  =     This . Imagevalue;
C. imagesize  =     This  . Imagesize;
  Return  C;
}

  Public  Image
{
  Get 
{
  Return     This  . Imagevalue;
}
  Set  
{
  If  ( This  . Image  ! =  Value)
{
  This  . Imagevalue  =  Value;
  This  . Imagesize  = Value. size;
  If  (  This  . Inheritedstyle  ! =     Null  )
{
Padding inheritedpadding  =    This  . Inheritedstyle. padding;
  This  . Defaultcellstyle. padding  =     New Padding (imagesize. Width, inheritedpadding. Top, inheritedpadding. Right, inheritedpadding. Bottom );
}
}
}
}

  Private  Textandimagecell textandimagecelltemplate
{
  Get 
{
  Return     This  . Celltemplate  As  Textandimagecell;
}
}
  Internal Size imagesize
{
  Get  
{
  Return  Imagesize;
}
}
}

  Public     Class Textandimagecell: maid
{
  Private  Image imagevalue;

  Private  Size imagesize;

  Public     Override     Object Clone ()
{
Textandimagecell C  =     Base  . Clone ()  As  Textandimagecell;
C. imagevalue  =     This  . Imagevalue;
C. imagesize =     This  . Imagesize;
  Return  C;
}

  Public  Image
{
  Get 
{
  If  (  This  . Owningcolumn  =     Null     |     This  . Owningtextandimagecolumn  =    Null  )
{
  Return  Imagevalue;
}
  Else     If  (  This . Imagevalue  ! =     Null  )
{
  Return     This  . Imagevalue;
}
  Else 
{
  Return     This  . Owningtextandimagecolumn. image;
}
}
  Set 
{
  If  (  This  . Imagevalue  ! =  Value)
{
  This  . Imagevalue  = Value;
  This  . Imagesize  =  Value. size;
Padding inheritedpadding  =     This  . Inheritedstyle. padding;
  This . Style. padding  =     New  Padding (imagesize. Width, inheritedpadding. Top, inheritedpadding. Right, inheritedpadding. Bottom );
}
}
}

  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)
{
 //  Paint the base content  
    Base  . Paint (graphics, clipbounds, cellbounds, rowindex, cellstate, value, formattedvalue, errortext, cellstyle, advancedborderstyle, paintparts );
  If  (  This  . Image  ! =    Null  )
{
  //  Draw the image clipped to the cell.  
  System. Drawing. drawing2d. graphicscontainer container  = Graphics. begincontainer ();
Graphics. setclip (cellbounds );
Graphics. drawimageunscaled (  This  . Image, cellbounds. Location );
Graphics. endcontainer (container );
}
}

  Private Textandimagecolumn owningtextandimagecolumn
{
  Get  
{
  Return     This  . Owningcolumn  As  textandimagecolumn; 
}< BR >}< br> 
}< br>