mouse double click in listview?

Serhan Srhn

I have a listview and want to show folders in C drive in listview. but when I clicked double to listview, it doesn't show folders in folder, for example; folders in program files. I wonder how can I list folders in C drive by mouse duble clicking?

private void lstw_MouseDoubleClick(object sender, MouseEventArgs e)
{
for (int i = 0; i < lstw.Items.Count; i++)
{
if (lstw.Items[i].Selected == true)
{
string path = lstw.Items[i].Name;
lstw.Items.Clear();
listFill(path);
}
}

}

private void listFill(string pth)
{
DirectoryInfo dInfo = new DirectoryInfo(pth);

try
{

foreach (DirectoryInfo di in dInfo.GetDirectories())
{
lstw.Items.Add(di.Name,di.FullName);
}
}
catch { }
}

7 Replies

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Vulpes11y ago
Well, I tried the latest code myself but it worked fine so I'm baffled as to why it's not working on your machine :-/

The original exception you were getting suggested that the path itself was invalid. So am I right in thinking that the selected ListViewItem contains the text: c:\program files ?

One thing I would do is to place 'break' after you've refilled the ListView since the results of continuing to iterate it could be unpredictable:

for (int i = 0; i < lstw.Items.Count; i++)
{
if (lstw.Items[i].Selected == true)
{
string path = lstw.Items[i].Text;
lstw.Items.Clear();
listFill(path);
break;
}
}
Serhan Srhn11y ago
Vulpes thanks for your helping.

but the result is same. it didn't give an error, but didn't list. listview seems no item.
Vulpes11y ago
Hmm, I suspect what's happening here is that you're getting an "access denied" exception on one of the folders which is causing the code to hit the catch block without adding anything to the listview.

When I tried it myself, this is what happened to me on one of the SQL Server files.

However, I've found a solution on the following site which is to do the recursion yourself on the sub-folders. This also allows you to deal with another possible problem - reparse points - at the same time:

http://www.blackwasp.co.uk/FolderRecursion.aspx

I've adapted the code given on that site to the situation here and so I'd now try this:

private void listFill(string path)
{
try
{
if ((File.GetAttributes(path) & FileAttributes.ReparsePoint)
!= FileAttributes.ReparsePoint)
{
foreach (string folder in Directory.GetDirectories(path))
{
lstw.Items.Add(Path.GetFileName(folder), folder);
listFill(folder);
}
}
}
catch { } // leave this to catch any exception
}
Serhan Srhn11y ago
thanks for reply.

it didn't gave an error but it didn't list. I clicked to list on program files folder, listview looks no item.
Vulpes11y ago
It appears that the exception is occurring on this line:

DirectoryInfo dInfo = new DirectoryInfo(pth);

rather than the one we've altered.

This may be because in this line:

string path = lstw.Items[i].Name;

you're using the Name property of the ListViewItem (which defaults to an empty string) rather than the Text property?

However, you could move the offending line into the 'try' block so any such exceptions will be caught and swallowed.
Serhan Srhn11y ago
Vulpes thanks for reply. I tried your code. but it gave a error.
Vulpes11y ago
Try this:

private void listFill(string pth)
{
DirectoryInfo dInfo = new DirectoryInfo(pth);

try
{

foreach (DirectoryInfo di in dInfo.GetDirectories("*", SearchOption.AllDirectories))
{
lstw.Items.Add(di.Name,di.FullName);
}
}
catch { }
}