FileIOException, Need help please

[Moe]

I have a winForm control that contains an openFileDialog.
I am using this control in a webForm by enbedding it using an <object> tag.
I need to access some information about the file on the client.
I strongly named my control assembly .
I created a machine level permission set, and assigned FileDialog, FileIO
and User interface permission.
I created a code group under all_Code, associated my assembly's strong name
to that group and assigned the permission set i created previously.

I also added the following attributes to my assembly:
[assembly:AllowPartiallyTrustedCallers]
[assembly: FileDialogPermission(SecurityAction.RequestMinimum, Unrestricted
= true)]
[assembly: UIPermission(SecurityAction.RequestMinimum, Unrestricted = true)]
[assembly: FileIOPermission(SecurityAction.RequestMinimum, Unrestricted =
true)]


I am having a file IO Exception while trying to retreive the FileName
property of the openFileDialog.

Any help will be very appreciate it.

Thanks!

 

[Nicole Calinoiu]

I have a winForm control that contains an openFileDialog.
I am using this control in a webForm by enbedding it using an <object>
tag.
I need to access some information about the file on the client.
I strongly named my control assembly .
I created a machine level permission set, and assigned FileDialog, FileIO
and User interface permission.
I created a code group under all_Code, associated my assembly's strong
name
to that group and assigned the permission set i created previously.

Not a great idea. It would be better to add the new group under the
appropriate zone group (usually intranet) in order to minimize the potential
impact of a compromise of your signing key.

I also added the following attributes to my assembly:
[assembly:AllowPartiallyTrustedCallers]
[assembly: FileDialogPermission(SecurityAction.RequestMinimum,
Unrestricted
= true)]
[assembly: UIPermission(SecurityAction.RequestMinimum, Unrestricted =
true)]
[assembly: FileIOPermission(SecurityAction.RequestMinimum, Unrestricted =
true)]


I am having a file IO Exception while trying to retreive the FileName
property of the openFileDialog.

It really shouldn't be getting that far. Given that you've specified a
RequestMinimum for
unrestricted FileIOPermission, your assembly should not run at all if this
permission is denied. Are you sure that you're attempting to run the latest
version of the assembly?

That said, you'll still have a problem once you resolve the above issue
since the IE host won't resolve your assembly's strong name until after the
permissions grant is complete. For workarounds, see
http://blogs.msdn.com/shawnfa/archive/2003/06/26/57026.aspx.

 

[Dominick Baier [DevelopMentor]]

Hello Nicole Calinoiu" calinoiu REMOVETHIS AT gmail DOT com,

i would also suggest to not use the filename that is returned from the fileopen
dialog but the FileStream..does not require that much permissions...

---------------------------------------
Dominick Baier - DevelopMentor
http://www.leastprivilege.com

I have a winForm control that contains an openFileDialog.
I am using this control in a webForm by enbedding it using an
<object>
tag.
I need to access some information about the file on the client.
I strongly named my control assembly .
I created a machine level permission set, and assigned FileDialog,
FileIO
and User interface permission.
I created a code group under all_Code, associated my assembly's
strong
name
to that group and assigned the permission set i created previously.

Not a great idea. It would be better to add the new group under the
appropriate zone group (usually intranet) in order to minimize the
potential impact of a compromise of your signing key.

I also added the following attributes to my assembly:
[assembly:AllowPartiallyTrustedCallers]
[assembly: FileDialogPermission(SecurityAction.RequestMinimum,
Unrestricted
= true)]
[assembly: UIPermission(SecurityAction.RequestMinimum, Unrestricted =
true)]
[assembly: FileIOPermission(SecurityAction.RequestMinimum,
Unrestricted =
true)]
I am having a file IO Exception while trying to retreive the FileName
property of the openFileDialog.

It really shouldn't be getting that far. Given that you've specified
a
RequestMinimum for
unrestricted FileIOPermission, your assembly should not run at all if
this
permission is denied. Are you sure that you're attempting to run the
latest
version of the assembly?
That said, you'll still have a problem once you resolve the above
issue since the IE host won't resolve your assembly's strong name
until after the permissions grant is complete. For workarounds, see
http://blogs.msdn.com/shawnfa/archive/2003/06/26/57026.aspx.

Any help will be very appreciate it.

Thanks!

 

[Nicole Calinoiu]

That would only work if the goal is to open the file for reading, which
doesn't sound like the case here ("access some information about the file on
the client" from OP). My guess is that it's probably more likely that
FileDialogPermission can be dispensed with in this particular case rather
than FileIOPermission. However, the assembly may also contain other
functionality, so permissions that appear superfluous to us may actually be
required by other code...

Hello Nicole Calinoiu" calinoiu REMOVETHIS AT gmail DOT com,

i would also suggest to not use the filename that is returned from the
fileopen dialog but the FileStream..does not require that much
permissions...

---------------------------------------
Dominick Baier - DevelopMentor
http://www.leastprivilege.com

I have a winForm control that contains an openFileDialog.
I am using this control in a webForm by enbedding it using an
<object>
tag.
I need to access some information about the file on the client.
I strongly named my control assembly .
I created a machine level permission set, and assigned FileDialog,
FileIO
and User interface permission.
I created a code group under all_Code, associated my assembly's
strong
name
to that group and assigned the permission set i created previously.

Not a great idea. It would be better to add the new group under the
appropriate zone group (usually intranet) in order to minimize the
potential impact of a compromise of your signing key.

I also added the following attributes to my assembly:
[assembly:AllowPartiallyTrustedCallers]
[assembly: FileDialogPermission(SecurityAction.RequestMinimum,
Unrestricted
= true)]
[assembly: UIPermission(SecurityAction.RequestMinimum, Unrestricted =
true)]
[assembly: FileIOPermission(SecurityAction.RequestMinimum,
Unrestricted =
true)]
I am having a file IO Exception while trying to retreive the FileName
property of the openFileDialog.

It really shouldn't be getting that far. Given that you've specified
a
RequestMinimum for
unrestricted FileIOPermission, your assembly should not run at all if
this
permission is denied. Are you sure that you're attempting to run the
latest
version of the assembly?
That said, you'll still have a problem once you resolve the above
issue since the IE host won't resolve your assembly's strong name
until after the permissions grant is complete. For workarounds, see
http://blogs.msdn.com/shawnfa/archive/2003/06/26/57026.aspx.

Any help will be very appreciate it.

Thanks!

 

[Moe]

Thank you guys for your help.
I apreciate it

That would only work if the goal is to open the file for reading, which
doesn't sound like the case here ("access some information about the file on
the client" from OP). My guess is that it's probably more likely that
FileDialogPermission can be dispensed with in this particular case rather
than FileIOPermission. However, the assembly may also contain other
functionality, so permissions that appear superfluous to us may actually be
required by other code...

Hello Nicole Calinoiu" calinoiu REMOVETHIS AT gmail DOT com,

i would also suggest to not use the filename that is returned from the
fileopen dialog but the FileStream..does not require that much
permissions...

---------------------------------------
Dominick Baier - DevelopMentor
http://www.leastprivilege.com

I have a winForm control that contains an openFileDialog.
I am using this control in a webForm by enbedding it using an
<object>
tag.
I need to access some information about the file on the client.
I strongly named my control assembly .
I created a machine level permission set, and assigned FileDialog,
FileIO
and User interface permission.
I created a code group under all_Code, associated my assembly's
strong
name
to that group and assigned the permission set i created previously.
Not a great idea. It would be better to add the new group under the
appropriate zone group (usually intranet) in order to minimize the
potential impact of a compromise of your signing key.

I also added the following attributes to my assembly:
[assembly:AllowPartiallyTrustedCallers]
[assembly: FileDialogPermission(SecurityAction.RequestMinimum,
Unrestricted
= true)]
[assembly: UIPermission(SecurityAction.RequestMinimum, Unrestricted =
true)]
[assembly: FileIOPermission(SecurityAction.RequestMinimum,
Unrestricted =
true)]
I am having a file IO Exception while trying to retreive the FileName
property of the openFileDialog.

It really shouldn't be getting that far. Given that you've specified
a
RequestMinimum for
unrestricted FileIOPermission, your assembly should not run at all if
this
permission is denied. Are you sure that you're attempting to run the
latest
version of the assembly?
That said, you'll still have a problem once you resolve the above
issue since the IE host won't resolve your assembly's strong name
until after the permissions grant is complete. For workarounds, see
http://blogs.msdn.com/shawnfa/archive/2003/06/26/57026.aspx.

Any help will be very appreciate it.

Thanks!