FileNotFoundException error using SHDocVw.ShellWindows

[nagar]

In certain occasions I get an exception when trying to read the shown
path for the active explorer window

When I instantiate the object

SHDocVw.ShellWindows shell = new ShellWindowsClass();

it generates the exception. This doesn't happen every time.

I can provide more code if needed.

Thanks.
Andrea

[Mr. Arnold]

<na***@community.nospamwrote in message
news:76********************************@4ax.com...

In certain occasions I get an exception when trying to read the shown
path for the active explorer window

When I instantiate the object

SHDocVw.ShellWindows shell = new ShellWindowsClass();

it generates the exception. This doesn't happen every time.

I can provide more code if needed.

You can provide more code. But keep in mind, that this can just be glitch
with .Net itself, which I have encountered with MS programming solutions at
times over the years. It can become frustrating at times when something
doesn't work the way it should and it in code.

[Walter Wang [MSFT]]

Hi Andrea,

Please show us some code. Thanks.
Regards,
Walter Wang (wa****@online.microsoft.com, remove 'online.')
Microsoft Online Community Support

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[nagar]

Here's the code that I use.
I use it to get the path for the active explorer window. The
instruction that throws the FileNotFound exception is

SHDocVw.ShellWindows shell = new ShellWindowsClass();

The strange thing is that it seems to happen only on certain
occasions. I'm using it when my application starts up and it works
fine. When I try to use in a special situation (after a new instance
of the application has sent a message to the previous instance) I get
the exception.

BTW, I'm using .NET 1.1

Thanks
Andrea

private string getActiveExplorerPath(IntPtr handle, bool onlyfile) {

string finaltarget=String.Empty;
string path=String.Empty;

SHDocVw.ShellWindows shell = new ShellWindowsClass();
int ihandle=handle.ToInt32();
foreach (InternetExplorer ie in shell) {

if (ihandle == ie.HWND) {
path=ie.LocationURL;
}
}

return path;
}

[Walter Wang [MSFT]]

Thanks for the detailed information and the code.

I've already tried the "new ShellWindowsClass" before and tried your new
code again, this also doesn't reproduce the issue on my side.

I will need your help to reproduce the issue on my side before I can help
find the root cause.

Since this issue is related to COM interop to calling the shdocvw.dll,
first we need to isolate this issue by using a VBScript or VB6 code to test
the function. If this issue also occurs on your side using these unmanaged
code, then this issue is related to the shdocvw.dll itself; if not, then
this issue might be related to the .NET's COM interop code.

Please note if this issue is really difficult to reproduce stably, I'm
afraid there's not really much I can do from my side. In that case,
contacting our Customer Support and Service will be better. As a MSDN
subscriber, you can use one of your support incident to open a case for
that. See my signature for more detail. Thanks.
Sincerely,
Walter Wang (wa****@online.microsoft.com, remove 'online.')
Microsoft Online Community Support

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[Walter Wang [MSFT]]

Hi,

Without reproducible code, there's really much I can do from my side.

Please let me know if you get further information on this. Thanks.
Regards,
Walter Wang (wa****@online.microsoft.com, remove 'online.')
Microsoft Online Community Support

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that others may learn and benefit from your issue.
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[Walter Wang [MSFT]]

Hi Andrea,

I'm still waiting for your reproducible project to test this issue on my
side. If you see this, would you please email me the code? Thanks.
Regards,
Walter Wang (wa****@online.microsoft.com, remove 'online.')
Microsoft Online Community Support

==================================================
When responding to posts, please "Reply to Group" via your newsreader so
that others may learn and benefit from your issue.
==================================================

This posting is provided "AS IS" with no warranties, and confers no rights.