@@ -6,6 +6,21 @@ namespace CodeSamples.ClipboardUse
66{
77 internal class ClipboardSample : SampleExecute
88 {
9+ /// <summary>
10+ /// CFSTR_PREFERREDDROPEFFECT
11+ /// </summary>
12+ public const string FileDropEffect = "Preferred DropEffect" ;
13+ 14+ /// <summary>
15+ /// DROPEFFECT_MOVE
16+ /// </summary>
17+ public const byte DropEffectMove = 0x02 ;
18+ 19+ /// <summary>
20+ /// DROPEFFECT_COPY
21+ /// </summary>
22+ public const byte DropEffectCopy = 0x05 ;
23+ 924 private bool HasFilesInClipboard ( )
1025 {
1126 return Clipboard . GetDataObject ( ) . GetDataPresent ( DataFormats . FileDrop ) ;
@@ -24,7 +39,7 @@ private void CopyFilesToClipboard(List<string> filesToCopy, bool cutOperation)
2439 //data.SetData("FileDrop", true, files);
2540
2641 MemoryStream memory = new MemoryStream ( 4 ) ;
27- byte [ ] bytes = new byte [ ] { ( byte ) ( cutOperation ? 0x02 : 0x05 ) , 0x00 , 0x00 , 0x00 } ;
42+ byte [ ] bytes = new byte [ ] { ( byte ) ( cutOperation ? DropEffectMove : DropEffectCopy ) , 0x00 , 0x00 , 0x00 } ;
2843 memory . Write ( bytes , 0 , bytes . Length ) ;
2944
3045 data . SetData ( "Preferred DropEffect" , memory ) ;
@@ -41,13 +56,13 @@ private List<string> PasteFilesFromClipboard()
4156 IDataObject data = Clipboard . GetDataObject ( ) ;
4257
4358 string [ ] files = ( string [ ] ) data . GetData ( DataFormats . FileDrop ) ;
44- MemoryStream stream = ( MemoryStream ) data . GetData ( "Preferred DropEffect" , true ) ;
59+ MemoryStream stream = ( MemoryStream ) data . GetData ( FileDropEffect , true ) ;
4560
4661 int flag = stream . ReadByte ( ) ;
47- if ( flag != 0x02 && flag != 0x05 )
62+ if ( flag != DropEffectMove && flag != DropEffectCopy )
4863 return result ;
4964
50- bool moveFiles = ( flag == 0x02 ) ;
65+ bool moveFiles = ( flag == DropEffectMove ) ;
5166
5267 foreach ( string file in files )
5368 {
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