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i know how to handle file(s) are drap and drop into my window form.
but how to handle/achieve drad and drop into desktop/explorer?
thank you very much
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| codetale Monday, August 27, 2007 2:31 PM |
This worked for me:
public partial class Form1 : Form {
public Form1() {
InitializeComponent();
this.MouseDown += Form1_MouseDown;
}
private void Form1_MouseDown(object sender, MouseEventArgs e) {
string[] files = new string[] { @"c:\temp\test.txt" };
this.DoDragDrop(new DataObject(DataFormats.FileDrop, files), DragDropEffects.Copy);
}
}
|
| nobugz Monday, August 27, 2007 4:28 PM |
This worked for me:
public partial class Form1 : Form {
public Form1() {
InitializeComponent();
this.MouseDown += Form1_MouseDown;
}
private void Form1_MouseDown(object sender, MouseEventArgs e) {
string[] files = new string[] { @"c:\temp\test.txt" };
this.DoDragDrop(new DataObject(DataFormats.FileDrop, files), DragDropEffects.Copy);
}
}
|
| nobugz Monday, August 27, 2007 4:28 PM |
this work for me too  thankyou very much another question, this work for local drive files, but what if network path? like FTP my idea is download the selected items to temporary path after user drop on desktop/explorer, copy to drop path when finish download but i totally no idea how to handle the event thanks again |
| codetale Monday, August 27, 2007 5:06 PM |
Windows Explorer doesn't support this. You would have to write a drag and drop shell extension. You can't do that in .NET. |
| nobugz Monday, August 27, 2007 5:36 PM |
i see,
do you have any nice article/example about shell extension programming?
thankyou
|
| codetale Monday, August 27, 2007 5:50 PM |
Google is usually good for that. Try this page. |
| nobugz Monday, August 27, 2007 5:55 PM |
thankyou so much
|
| codetale Monday, August 27, 2007 6:15 PM |
I have read all parts about the article that you show me,
but there none of them are talking feedback(maybe i have missed something)
is there any way to know "where" user drop?
what i want to implement is:
when user drag the picture from my application and
drop it into desktop/explorer, then my application create a image file on the drop path
if user drop into others application like photoshop, then my application create a temporary file and send to photoshop
so, what i need to detect where user are dropping the item.
DoDragDrop seem only return DragDropEffects, so that only possible to check whether the task are complete/fail/cancel
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| codetale Wednesday, August 29, 2007 8:47 AM |
The DragDrop event must be implemented by the application that owns the window that you dropped on. There is no notification back to your app, other than the return value of DoDragDrop(). You cannot participate in the operation. So if you want to drop an FTP shortcut onto an Explorer window, you'll have to make Explorer smart enough to handle the required FTP transfer. Making it smart enough requires a shell extension handler. Perhaps D+D is not the best solution here. |
| nobugz Wednesday, August 29, 2007 9:01 AM |
thankyou for reply i just found this article, it seem possible to did what i need without shell extension How to drag a virtual file from your app into Windows Explorer
but i not sure it can implement in C# or not, because i don't know enough about interop |
| codetale Wednesday, August 29, 2007 9:39 AM |
The .NET framework doesn't support delayed rendering. I suppose it is possible, you have the native COM IDataObject interface definition available in System.Runtime.InteropServices.ComTypes. That grass is too tall for my mower though. Keep Googling, I'd assume somebody tried to implement it. |
| nobugz Wednesday, August 29, 2007 10:10 AM |
few months google'ing, but still no luck to get any managed delayed render but i come out a stupid solution but it work(at least it work now, but dunno whether have side effest or not) the solution is: before DoDargDrop, i create a temparary file with unique name in temp folder, then setup a FileSystemWatcher to watch all drive for creation of file, and check whether is the unique name which i created, if that so, i get the file folder. thats it, i got the drop target path  but now my problem is: i dunno how exactly windows handle the notification, so if the FileSystem contain many files, folders and subfolders, will it cause problem? like  ystem crash, or slowdown system, etc... |
| codetale Monday, November 05, 2007 4:51 AM |
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