|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73 |
public
partial
class
UserControl1 : WebBrowser{ private
const
int
WmDropfiles = 0x233; [DllImport("shell32.dll")] private
static
extern
uint
DragQueryFile(IntPtr hDrop, uint
iFile, StringBuilder lpszFile, uint
cch); [DllImport("shell32.dll")] private
static
extern
void
DragAcceptFiles(IntPtr hWnd, bool
fAccept); protected
override
void
OnHandleCreated(EventArgs e) { base.OnHandleCreated(e); //指示接受文件拖放操作 if
(!DesignMode) { DragAcceptFiles(Handle, true); } } protected
override
void
WndProc(ref
Message m) { if
(m.Msg == WmDropfiles) { #region 解析消息 //获取拖放的文件数量 var
count = DragQueryFile(m.WParam, 0xffffffff, null, 0); //解析所有播放的文件路径 var
filePaths = new
string[count]; for
(uint
i = 0; i < count; i++) { var
sb = new
StringBuilder(); DragQueryFile(m.WParam, i, sb, 1024); filePaths[i] = sb.ToString(); } #endregion //是否继续触发之后的消息处理 var
isCancel = false; #region 触发自定义文件拖放事件 if
(DragFile != null) { var
args = new
DragFileEventArgs(filePaths); DragFile(this, args); isCancel = args.IsCancel; } #endregion if
(isCancel) return; } base.WndProc(ref
m); } public
event
EventHandler<DragFileEventArgs> DragFile; public
class
DragFileEventArgs : EventArgs { private
readonly
string[] _filePaths; public
bool
IsCancel { get; set; } public
DragFileEventArgs(string[] filePaths) { _filePaths = filePaths; } public
string[] FilePaths { get
{ return
_filePaths; } } }} |
原文：http://www.cnblogs.com/beta2013/p/3522482.html