Re: C# - File Permission - C# Discussion Boards

Um... it works when I F5 but not when I CTRL - F5...?

29-Apr-09 13:10

I don't know if this will help you, but take a look at this CP Article[^]. I have found it useful and it contains some links to other articles/resources which may assist.

Edmundisme29-Apr-09 11:27

Edmundisme

29-Apr-09 11:27

Hi,

I have a simple solution with a windows client and a website. The website exposes a web service that the windows client consumes. So far so good. Here's the weird part. When running my solution in VS, the call to the web service doesn't work when I hit CTRL + F5 unless I run it with a simple F5 first. So each time I open the solution in a new VS session, I have to run it in debug (F5) at least once before it works without debugging (CTRL + F5).

This makes no sense to me. Has anyone else run into an issue like this? Any ideas would be greatly appreciated!

Thanks!

Ian

Re: Um... it works when I F5 but not when I CTRL - F5...?

Eddy Vluggen29-Apr-09 12:45

Eddy Vluggen

29-Apr-09 12:45

It should respond with a (recompile if neccesary) during <CTRL>+<F5>. Have you checked/resetted your keymappings?

Re: Um... it works when I F5 but not when I CTRL - F5...?

Edmundisme29-Apr-09 12:47

Edmundisme

29-Apr-09 12:47

The key mappings are fine. Again, the application runs with a CTRL + F5 - it just doesn't work unless I've already run it with a simple F5. I wondering if it's a VS bug? I'm running it in a VM on a 64 bit test environment...

C# - File Permission

malharone29-Apr-09 10:44

malharone

29-Apr-09 10:44

This is a very trivial question, but I have not had much chance in finding a solution. I have searched Google / blogs, but apparantly either there is no solution or I searched for the wrong keyword. Any help will be greatly appreciated.

I have an application (similar to a wizard) and I need to validate whether the user has the permission to write/read from a particular location.

I the following function (below), but I am always getting the value "true" eventhough from Windows Explorer when I try to navigate to the location, I'm always getting an error (eg. "You need permission to perform this action. [Retry] [Cancel]").

static bool CanReadAndWrite(string path)
{
      var perm = new FileIOPermission(
                  FileIOPermissionAccess.Write & 
                  FileIOPermissionAccess.Read &
                  FileIOPermissionAccess.PathDiscovery,
                  path);
      try
      {
            perm.Demand();
            return true;
      }
      catch
      {
            return false;
      }
}

Many of the blogs/articles suggest that I should attemt to write to the location anyways, and if the write operation is successful, then I can proceed to write the main data. If there is an exception creating the stram then there is a perimission issue.

But this solution would NOT work for me. The application has two "pages".
- First wizard page: user selects the file path
- Second wizard page: specify options
- Third wizard page: write data

Each of the pages has Cancel button and the expectation is that user NOT be able to continue to the 2nd page if permission is denied. The above suggested solution would WORK fine if the user does not have permission. But if the user DOES have permission, then the validation check in Page # 1 would have created new file and/or overwrote an existing file with 0 bytes -- and if user cancels on Page #2 then there is a useless file on the file system.

So anyways, what should I do (clean implementation) to check for file permision?
I'm using Vista, .Net 3.5.

Thanks,

- Malhar

Re: C# - File Permission

Jimmanuel29-Apr-09 11:19

Jimmanuel

29-Apr-09 11:19

Create the temporary file to test the permissions and then immediately delete it. Whether the user continues the process or cancels it the file isn't needed at all after you've verified the permissions of the selected path.

Re: C# - File Permission

Luc Pattyn29-Apr-09 11:33

Luc Pattyn

29-Apr-09 11:33

Shouldn't you use an OR operator ('|') to request all those permissions?
I guess the AND result is plain zero.

Smile | :)

Re: C# - File Permission

malharone29-Apr-09 13:17

malharone

29-Apr-09 13:17

Sorry for overlooking the detail when I pasted the code. But my original attempt included "|". I just tried now instantiating "perm" object like below:

var perm = new FileIOPermission(FileIOPermissionAccess.Write, directory);

But still no luck.

- Malhar

Help with Web Service Upload

charles Frank29-Apr-09 10:16

charles Frank

29-Apr-09 10:16

Hello,

I'm building my first web service in C#. I have met most of my needs for this service so far up to sending files. If this needs to go to another section. Please let me know which section to post in.

The basic steps of the service are:

1. receive an xml file through asp.net page
2. read xml and save to database.
3. read xml and retrieve file nodes and location for other files.
4. upload other files to directory on server.

This last step is where I need a tutorial or some suggestions.

As it stands I would just like to pull the files from client in some fashion after reading the xml file information. If anybody has a link to an article that would be great. I have looked at the Mtom solution but that is not viable for a web application.

Thanks to anybody that responds.

chuck

How can I use cookies stored by Internet Explorer 7(in Vista) in my WinForms application?

rebulanyum29-Apr-09 10:08

rebulanyum

29-Apr-09 10:08

Refering to my topic on msdn[^] can anyone help me about it...

Re: How can I use cookies stored by Internet Explorer 7(in Vista) in my WinForms application?

Henry Minute29-Apr-09 10:59

Re: How can I use cookies stored by Internet Explorer 7(in Vista) in my WinForms application? [modified]

29-Apr-09 10:59

Have a little patience, you have only been waiting 4 hours. Instant answers cost money. Smile | :)

Henry Minute

Do not read medical books! You could die of a misprint. - Mark Twain
Girl: (staring) "Why do you need an icy cucumber?"
“I want to report a fraud. The government is lying to us all.”

rebulanyum30-Apr-09 4:36

rebulanyum

30-Apr-09 4:36

I think I found something[^] Big Grin | :-D

FOR FREE

And also another thing[^] Dead | X|

FOR 12,95 $/Month

To view the Experts-Exchange solutions for free use the techinique described in this web site[^].

modified on Friday, May 1, 2009 5:49 AM

Why pictures aren't shown in listview

Aljaz11129-Apr-09 9:06

29-Apr-09 9:06

I don't know why pictures aren't shown in listview.. i would like to add them like thumbnails..or small icons..so when i will click on them they will resize in picturebox.. Here is code for adding to listview which isn't working.

private void Form1_Load(object sender, EventArgs e)
        {
            DirectoryInfo dir = new DirectoryInfo(@"d:\\feri\\ičr\\galerija\\galerija\\galerija");

            foreach (FileInfo file in dir.GetFiles())
            {

                try
                {

                    this.imageList1.Images.Add(Image.FromFile(file.FullName));

                }

                catch
                {

                    Console.WriteLine("This is not an image file");

                }

            }

            this.listView1.View = View.LargeIcon;

            this.imageList1.ImageSize = new Size(32, 32);

            this.listView1.LargeImageList = this.imageList1;

            


            for (int j = 0; j < this.imageList1.Images.Count; j++)
            {

                ListViewItem item = new ListViewItem();

                item.ImageIndex = j;

                this.listView1.Items.Add(item);

            }

        }

Henry Minute29-Apr-09 9:34

29-Apr-09 9:34

Speaking purely from memory (can't get to VS to test at the moment) resizing an ImageList clears it. Your code resizes the ImageList after loading the images.

Try moving the resize to be before loading the images.

Aljaz11129-Apr-09 9:47

29-Apr-09 9:47

it works thanks..;)

Aljaz11129-Apr-09 10:01

29-Apr-09 10:01

Now its duplicating images in listview...how could everytime someone adds image to it..that content before would be erased and new images would be added then..

private void btn_browse_Click()
        {

            this.listView1.View = View.LargeIcon;

            this.imageList1.ImageSize = new Size(60, 60);

            this.listView1.LargeImageList = this.imageList1;

            try
            {

                OpenFileDialog open = new OpenFileDialog();

                open.Filter = "Image Files(*.jpg; *.jpeg; *.gif; *.bmp)|*.jpg; *.jpeg; *.gif; *.bmp";

                if (open.ShowDialog() == DialogResult.OK)
                {

                    picture.Image = new Bitmap(open.FileName);
                    this.imageList1.Images.Add(Image.FromFile(open.FileName));

                 
                    

                }

            }

            catch (Exception)
            {

                throw new ApplicationException("Failed loading image");

            }

            for (int j = 0; j < this.imageList1.Images.Count; j++)
            {

                ListViewItem item = new ListViewItem();

                item.ImageIndex = j;

                this.listView1.Items.Add(item);

            }
            
            
           

        }

Dan Neely29-Apr-09 10:12

Dan Neely

29-Apr-09 10:12

Aljaz111 wrote:
Now its duplicating images in listview...how could everytime someone adds image to it..that content before would be erased and new images would be added then..

It would be nice if the image collection had a method to clear itself. Big Grin | :-D

It is a truth universally acknowledged that a zombie in possession of brains must be in want of more brains.
-- Pride and Prejudice and Zombies

Henry Minute29-Apr-09 10:18

29-Apr-09 10:18

dan neely wrote:
It would be nice if the image collection had a method to clear itself.

Gosh, wouldn't that be a good idea. You'd have thought Microsoft would have thought of that, wouldn't you? Laugh | :laugh:

Aljaz11129-Apr-09 10:25

29-Apr-09 10:25

And how this method for cleaning would be?

Henry Minute29-Apr-09 10:35

29-Apr-09 10:35

private void btn_browse_Click()
{
    imageList1.Clear();

    // rest of your code here
    // but see below
}

Unless they are likely to be changed somewhere else in your application, you would be better off setting the following three properties in the designer.

this.listView1.View = View.LargeIcon;

this.imageList1.ImageSize = new Size(60, 60);

this.listView1.LargeImageList = this.imageList1;

You should be OK now. Good Luck! Smile | :)

Aljaz11129-Apr-09 10:43

29-Apr-09 10:43

Imagelist doesn't contain clear Frown | :(

Henry Minute29-Apr-09 10:54

29-Apr-09 10:54

Sorry, my bad. Blush | :O

should have been

this.imageList1.Images.Clear();

Aljaz11129-Apr-09 11:11