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Call Navigation/Maps/Drive with an Address in WP8.1 Application

I was wondering if it's possible to call the default navigation application within my Windows Phone 8.1 application. I have an address and I would like for the user to press a button and be able to navigate to that address through the default navigation app. If this is possible, how do I do it?
Thanks for your time,
Johan

You can launch turn-by-turn directions apps using the ms-drive-to and ms-walk-to schemes (depending on the type of directions you want) but you first need to get a geocoordinate for the address that you have. Since you're targeting Windows Phone 8.1, you can use the MapLocationFinder class in the Windows.Services.Maps namespace.
string locationName = "Empire State Building";
string address = "350 5th Avenue, New York City, New York 10018";
var locFinderResult = await MapLocationFinder.FindLocationsAsync(
address, new Geopoint(new BasicGeoposition()));
// add error checking here
var geoPos = locFinderResult.Locations[0].Point.Position;
var driveToUri = new Uri(String.Format(
"ms-drive-to:?destination.latitude={0}&destination.longitude={1}&destination.name={2}",
geoPos.Latitude,
geoPos.Longitude,
locationName));
Launcher.LaunchUriAsync(driveToUri);

the official solution is:
Uri uri = new Uri("ms-drive-to:?destination.latitude=" + latitude.ToString(CultureInfo.InvariantCulture) +
"&destination.longitude=" + longitude.ToString(CultureInfo.InvariantCulture))
var success = await Windows.System.Launcher.LaunchUriAsync(uri);
if (success)
{
// Uri launched.
}
else
{
MessageBox.Show("error");
}
But, there is a problem with this solution.
If you use the nokia programs (HERE), it works fine.
if you want to use waze, you have to add origin.latitude and origin.longitude.
in the MSDN page, They said that it is not necessary, but in fact, you have to write it.
I am already not enable to load moovit but if someone has an issue, it'll help me a lot.

C# Program Only Works in Debug Mode

Me and some of my colleagues are working on a project together, and have encountered a weird issue we can't manage to fix.The project involves the creation of a VNC connection between a client and a server, and is written in C# (we're using Visual Studio 2010). We're using the VNCSharp library for the client.The issue I speak of is that once we start the connection with the server, an ArgumentException is thrown.
Some of the information supplied was this:
********** Exception Text **********
System.ArgumentException: Parameter is not valid.
at System.Drawing.Bitmap..ctor(Int32 width, Int32 height, PixelFormat format)
at VncSharp.RemoteDesktop.SetupDesktop()
at VncSharp.RemoteDesktop.Initialize()
at VncSharp.RemoteDesktop.Connect(String host, Int32 display, Boolean viewOnly, Boolean scaled)
at VncSharp.RemoteDesktop.Connect(String host)
at RemoteDesktopTest.Form2.startConnection()
Another weird thing about this is that it only occures some of the times, whereas in others it works perfectly well. Specifically, it always works when run in debug mode (i.e, when we run the program line-by-line using F11), and either works or doesn't work when run regularly (i.e Ctrl+F5), without any pattern we could recognize.
We would be really grateful for any and all help; if there are any details I can add that would assist in the answering of this question, please let me know.
Additionally, I apologize for any grammar/spelling mistakes; English is not my first language... and I also apologize if something about this question is not alright. We're all beginners and this is our first "big project", so this is also my first time asking a question in Stack Overflow.
EDIT:
There are some parts of the code that are potentially relevant.
These are the lines of code automatically generated after we added the VncSharp control to the form and customized its settings:
this.remoteDesktop1 = new VncSharp.RemoteDesktop();
this.remoteDesktop1.AutoScroll = true;
this.remoteDesktop1.AutoScrollMinSize = new System.Drawing.Size(608, 427);
this.remoteDesktop1.Dock = System.Windows.Forms.DockStyle.Fill;
this.remoteDesktop1.Location = new System.Drawing.Point(0, 0);
this.remoteDesktop1.Name = "remoteDesktop1";
this.remoteDesktop1.Size = new System.Drawing.Size(1113, 580);
this.remoteDesktop1.TabIndex = 1;
This is the line of code in which I call the Connect method, while IP is simply the string taken from a text box:
remoteDesktop1.Connect(this.IP);
These are from the method which handles the ConnectComplete event (e is the EventArgs object passed to the method):
this.Location = new Point(0,0);
this.Size = Screen.PrimaryScreen.WorkingArea.Size;
this.remoteDesktop1.Size = new System.Drawing.Size(e.DesktopWidth, e.DesktopHeight);
Aside from the line in which the Disconnect method is called, we've written literally no other lines of code that deal with this object. If I'll realize I'd forgotten something, I'll edit again and add it. Also, if there's anything specific in the code I should add here, please let me know.

The issue was related to timing, it seems.
Out of debug mode, the program ran too fast and those width and height variable didn't have their values updated.
Luckily, VncSharp is open source, so I could add my own line and leave it in a loop as long as either of those two variables still has its default value, and now it works.
Thanks for the help, everyone :)

Had the same problem. For me it worked to compile the vncsharp solution in debug mode.

In RfbProtocol line 398 (first line of the ReadServerInit method), I transformed
int w = Reader.ReadUInt16();
to
int w = 0;
while (w == 0)
w = Reader.ReadUInt16();

Set FlashMode on Windows Phone 8 c#

I'm making my first camera app. I'm trying to set the flash mode with this line of code:
camera.SetProperty(KnownCameraPhotoProperties.FlashMode, FlashMode.Auto);
but I get this exception:
ArgumentException: Value does not fall within the expected range
I've also tried to check the availability of the Flash but the result doesn't change
var supportedFlashModes = PhotoCaptureDevice.GetSupportedPropertyValues(CameraSensorLocation.Back, KnownCameraPhotoProperties.FlashMode);
if (supportedFlashModes.ToList().Contains((UInt32)FlashMode.Auto))
{
camera.SetProperty(KnownCameraPhotoProperties.FlashMode, FlashMode.Auto);
}
Any ideas?

You have to use
camera.SetProperty(KnownCameraPhotoProperties.FlashMode, FlashState.Auto);
and it will work. See http://msdn.microsoft.com/en-us/library/windowsphone/develop/jj662940(v=vs.105).aspx for more details.

Fellow Oak DICOM - changing image window level

I am not an experienced programmer, just need to add a DICOM viewer to my VS2010 project. I can display the image in Windows Forms, however can't figure out how to change the window center and width. Here is my script:
DicomImage image = new DicomImage(_filename);
int maxV = image.NumberOfFrames;
sbSlice.Maximum = maxV - 1;
image.WindowCenter = 7.0;
double wc = image.WindowCenter;
double ww = image.WindowWidth;
Image result = image.RenderImage(0);
DisplayImage(result);
It did not work. I don't know if this is the right approach.

The DicomImage class was not created with the intention of it being used to implement an image viewer. It was created to render preview images in the DICOM Dump utility and to test the image compression/decompression codecs. Maybe it was a mistake to include it in the library at all?
It is difficult for me to find fault in the code as being buggy when it is being used for something far beyond its intended functionality.
That said, I have taken some time to modify the code so that the WindowCenter/WindowWidth properties apply to the rendered image. You can find these modifications in the Git repo.
var img = new DicomImage(fileName);
img.WindowCenter = 2048.0;
img.WindowWidth = 4096.0;
DisplayImage(img.RenderImage(0));

I looked at the code and it looked extremely buggy. https://github.com/rcd/fo-dicom/blob/master/DICOM/Imaging/DicomImage.cs
In the current buggy implementation setting the WindowCenter or WindowWidth properties has no effect unless Dataset.Get(DicomTag.PhotometricInterpretation) is either Monochrome1 or Monochrome2 during Load(). This is already ridiculous, but it still cannot be used because the _renderOptions variable is only set in a single place and is immediately used for the _pipeline creation (not giving you chance to change it using the WindowCenter property). Your only chance is the grayscale _renderOptions initialization: _renderOptions = GrayscaleRenderOptions.FromDataset(Dataset);.
The current solution: Your dataset should have
DicomTag.WindowCenter set appropriately
DicomTag.WindowWidth != 0.0
DicomTag.PhotometricInterpretation == Monochrome1 or Monochrome2
The following code accomplishes that:
DicomDataset dataset = DicomFile.Open(fileName).Dataset;
//dataset.Set(DicomTag.WindowWidth, 200.0); //the WindowWidth must be non-zero
dataset.Add(DicomTag.WindowCenter, "100.0");
//dataset.Add(DicomTag.PhotometricInterpretation, "MONOCHROME1"); //ValueRepresentations tag is broken
dataset.Add(new DicomCodeString(DicomTag.PhotometricInterpretation, "MONOCHROME1"));
DicomImage image = new DicomImage(dataset);
image.RenderImage();
The best solution: Wait while this buggy library is fixed.

.NET: drawing text hangs - FormattedText bug?

A customer has reported that our software hangs when he runs it on one of his computers. We narrowed down the problem to rendering text with FormattedText and put together a simple application for him to try, which just renders some text with different font parameters - this would hang too.
Here's the bit of code which does the actual text drawing:
Typeface typeface = new Typeface(m_Font, m_FontStyle, m_FontWeight, FontStretches.Normal);
FormattedText ftext = new FormattedText(m_Text, new CultureInfo("en-US"), FlowDirection.LeftToRight, typeface, m_FontSize, m_FontColor);
ftext.TextAlignment = CenterText ? TextAlignment.Center : TextAlignment.Left;
if (m_DrawOutline)
{
Geometry geom = ftext.BuildGeometry(CenterText ? new Point(ftext.Width, 0) : new Point());
dc.DrawGeometry(m_FontColor, DrawOutline ? new Pen(m_OutlineColor, m_OutlineWidth) : null, geom);
}
else
dc.DrawText(ftext, CenterText ? new Point(ftext.Width, 0) : new Point());
The program simply stops responding whenever the ftext.BuildGeometry, dx.DrawText methods or the ftext.Width property is called, regardless of font and text parameters used. This only happens on one computer, which is a touchscreen laptop (not sure this is relevant) running Windows 7. We already tried reinstalling the .NET Framework but this didn't help.
Has anyone encountered a similar problem? Any ideas how to fix, work around or at least find out more about what the reason for this problem is?
Thanks.

Never personally encountered that problem and I use Windows 7 at home. However, if it is only on one machine, it is a safe bet that the problem is not software related. The first step I would try is to download the most recent video display drivers and installing them. If it is still giving you a problem, try booting into safe mode and see if it will run.

I've had this problem occur due to a corrupt presentation font cache.
Stop the font cache service, delete the file %systemdrive%\Documents and Settings\LocalService\Local Settings\Application Data\FontCache3.0.0.0.dat (xp) and restart.
Details at http://social.msdn.microsoft.com/Forums/en-US/wpf/thread/7cc032c1-5f4d-4518-adc6-f53afd051e6b