C# Discussion Boards - CodeProject

Re: Migrating C# desktop application to Windows 10

19-May-16 21:25

The application should run without problems on Windows 10.

Richard Deeming20-May-16 1:47

Richard Deeming

20-May-16 1:47

1) There is no such thing as .NET 2.5 - see .NET Framework version history[^].

2) I suggest you change your username, as it currently makes you look like a spammer.

"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer

Build navigation with routed URL in ASP.NET MVC

Member 1204569219-May-16 19:16

Member 12045692

19-May-16 19:16

0 down vote
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I'm struggling with navigation in asp.net mvc and URLs.

When you are visiting your profile at facebook, the url is facebook.com/yourusername.

At your profile there is a menu with the following links: Timeline, About, Friends etc.

When you click on one of these links, for example Photos, the URL is changed to facebook.com/yourusername/Photos, and the photos are rendered. The menu described above are still there, and so also the profile picture and the cover picture. Its like a partial view has rendered viewing the photos.

I want to accomplish this effect in my project, but I don't know how to do it. I have tried to do it with Partial view but the problem is that the URL is not changed when the partial view is rendered.

Anyone can help me with this? How should I structure it?

Re: Build navigation with routed URL in ASP.NET MVC

Richard MacCutchan19-May-16 21:24

ASP.NET MVC. Specific URL for partial views

19-May-16 21:24

Please use the correct forum for your question. This is not a C# issue.

Member 1204569219-May-16 14:02

Member 12045692

19-May-16 14:02

Hi,

I have the following code:

<div class="col-lg-12 pull-left">
        <div class="user_menu">
            <ul>
                <li>@Ajax.ActionLink("Wall", "Wall", "Home", new AjaxOptions { UpdateTargetId = "main" })</li>
            </ul>
        </div>
    </div>
    <div id="main" class="col-lg-7 pull-left" style="margin-top: 15px;">

    </div>

The partial view Is rendered as expected inside my main div. But I want the URL to change when you render the partial. How can I do this?

So when I click on the link, I want to render the partial inside my div AND change the div to http://localhost123/Home/Wall

Re: ASP.NET MVC. Specific URL for partial views

Richard MacCutchan19-May-16 21:23

How can I download a picture in powershell and display it in C#?

19-May-16 21:23

Member 12045692 wrote:
I have the following code:

Then please use the ASP.NET forum[^].

turbosupramk319-May-16 10:34

Re: How can I download a picture in powershell and display it in C#?

19-May-16 10:34

I've tried code similar to what is below, I keep getting an error that says a parameter is missing and when I trace the error it appears the parameter name is "message" and it is blank.

How can I download an image in powershell, keep it in memory (not save it to a file) and then display it in a picturebox in c#?

I see this error mentioned 100's of times on the net and no one has an answer?

[code]

byte[] pictureByteArray = new byte[0];
            object pictureObject = new object();
            Collection<PSObject> results = powershellExchange.Invoke();
            foreach (PSObject result in results)
            {
                //MessageBox.Show(result.Properties["PictureData"].ToString());
                pictureObject = (result.Properties["PictureData"].Value);
                pictureByteArray = Encoding.ASCII.GetBytes(result.Properties["PictureData"].ToString());
                //pictureByteArray = BinaryReader
                
                
            }

            byte[] originalCoverData;
            BinaryFormatter bf = new BinaryFormatter();
            using (var ms = new MemoryStream())
            {
                bf.Serialize(ms, pictureObject);
                originalCoverData = ms.ToArray();
            }

            //http://stackoverflow.com/questions/3801275/how-to-convert-image-in-byte-array/16576471#16576471


            
            //string imageUrl = "http://www.gazzetta.it/Media/Foto/2007/04/17/1900384--346x212.jpg";

            //originalCoverData = new System.Net.WebClient().DownloadData(imageUrl);
            Image x = null;
            x = byteArrayToImage(originalCoverData);

            System.IO.MemoryStream stream = new System.IO.MemoryStream(originalCoverData);
            
            

            pbxDisplayPicture.Image = x;

            System.Drawing.Image img2 = System.Drawing.Image.FromStream(stream);

            pbxDisplayPicture.Image = img2;

[/code]

[code]

public Image byteArrayToImage(byte[] byteArrayIn)
        {
            using (MemoryStream mStream = new MemoryStream(byteArrayIn))
            {
                return Image.FromStream(mStream);
            }
        }

[/code]

Richard MacCutchan19-May-16 21:22

Re: How can I download a picture in powershell and display it in C#?

19-May-16 21:22

Where does the error occur?

turbosupramk324-May-16 9:11

Re: How can I download a picture in powershell and display it in C#?

24-May-16 9:11

Sorry for the delay, it always tells me

"Parameter is not valid" for mStream

public Image byteArrayToImage(byte[] byteArrayIn)
        {
            using (MemoryStream mStream = new MemoryStream(byteArrayIn))
            {
                return Image.FromStream(mStream);
            }
        }

The particular byte array in question is 8716 items, so it seems like the byte array is valid

Richard MacCutchan24-May-16 9:23

Re: How can I download a picture in powershell and display it in C#?

24-May-16 9:23

turbosupramk3 wrote:
it seems like the byte array is valid

Are you sure it contains a valid image? The error message suggests that it does not.

turbosupramk324-May-16 10:46

Re: How can I download a picture in powershell and display it in C#?

24-May-16 10:46

No I am not, do you have a suggestion on another way I can check?

The code under the Exception snapshot, always has the same error message with the Parameter is not valid at

Quote:
at System.Drawing.Image.FromStream(Stream stream, Boolean useEmbeddedColorManagement, Boolean validateImageData)
at System.Drawing.Image.FromStream(Stream stream)
at Updator.PictureUpdater.btnViewPicture_Click(Object sender, EventArgs e) in c:\Users\xxxx\Documents\Visual Studio 2012\Projects\Updator\Updator\Form1.cs:line 245
at System.Windows.Forms.Control.OnClick(EventArgs e)
at System.Windows.Forms.Button.OnClick(EventArgs e)
at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent)
at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.ButtonBase.WndProc(Message& m)
at System.Windows.Forms.Button.WndProc(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)
at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(IntPtr dwComponentID, Int32 reason, Int32 pvLoopData)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
at System.Windows.Forms.Application.Run(Form mainForm)
at Updator.Program.Main() in c:\Users\xxx\Documents\Visual Studio 2012\Projects\Exchange Picture Updator\Updator\Program.cs:line 19
at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.ThreadHelper.ThreadStart()

modified 24-May-16 17:25pm.

turbosupramk324-May-16 12:04

24-May-16 12:04

I figured it out, I had to build my own byte array and not use memory stream. Memory stream was corrupting the file and making it an additional 28 bytes. I'm not sure why this wasn't on the internet, as it seems 100's of people encounter this?

Thanks for pointing me in the right direction.

byte[] imgBytes = null;
            List<byte> imgBytesList = new List<byte>();
            object imgObj = null;
            Image img = null;
            foreach (PSObject obj in exResults)
            {
                imgObj = obj.Properties["PictureData"].Value;
            }


            
            foreach (byte byt in (dynamic)imgObj)
            {
                imgBytesList.Add(byt);
                
            }

            imgBytes = imgBytesList.ToArray();




            using (var ms = new MemoryStream(imgBytes))
            {
                img = Image.FromStream(ms);
                
            }

            pbxDisplayPicture.Image = img;

IDisposable with COM

hpjchobbes19-May-16 5:13

hpjchobbes

19-May-16 5:13

I have an application that uses a COM object to make a connection to an application. I need to make sure that when my application ends that I call the EndSession and CloseConnection methods of this COM object. I was reading this article: Implementing IDisposable and the Dispose Pattern Properly[^] as I think this is what I would need to do to make sure my closing code always gets called, but it doesn't seem to happen when I stop debugging. The application that I am connecting to still thinks my program is connected. It seems like when I stop debugging (or if I have a program crash, that the Dispose methods don't get called. I also tried to add a Finalizer but that causes a System.Runtime.InteropServices.InvalidComObjectException stating that the COM object that has been separated from it's underlying RCW cannot be used.

private bool disposed;
protected virtual void Dispose(bool disposing)
{
    if (!disposed)
    {
        if (_Session != null) // _Session is the COM object.
        {
            _Session.EndSession();       // These are the COM functions to close and end the 
            _Session.CloseConnection();  // session that must be called, but this is where I
            _Session = null;             // get the InvalidComObjectException.
        }
        disposed = true;
    }
}
public void Dispose()
{
    Dispose(true);
    GC.SuppressFinalize(this);

}
~SessionConnection() // This was added, which seems to be the root cause of the COM exception
{
    Dispose(false);
}

I'm not sure what is the best way to ensure that the EndSession and CloseConnection methods of my COM object get called even if my program crashes or I stop debugging.

Gerry Schmitz19-May-16 5:35

Gerry Schmitz

19-May-16 5:35

I doesn't "seem" like you are sure if Dispose() is getting called so you should add a "log entry" in Dispose() to be sure.

Your "session" instance looks private.

You could try (pardon the pun), a higher level "try ... finally", where the finally always runs and checks your object for null, disposes it, etc.

Then there are application level exception handlers and "exits" ... you need to log to understand which paths your particular app can end on.

Dave Kreskowiak19-May-16 5:36

Dave Kreskowiak

19-May-16 5:36

When you launch the code from inside Visual Studio, it's launched, the debugger is attached and you debug on your merry way. If you hit Stop inside Visual Studio, your code is stopped, wherever it is, and removed from memory. Your Dispose code never gets executed.

The only way to make sure it does is if you exit your application as a user would, gracefully.

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Dave Kreskowiak

OriginalGriff19-May-16 6:16

OriginalGriff

19-May-16 6:16

That's what I was going to say!
The only thing I'd add is that the same thing will happen if you use Task Manager to kill the process. So if this is causing a problem with "Stop debugging" it'll also cause the same problem if the user terminates the app.

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