| public static InternetAccessIsAvailable ( ) : bool | ||
| return | bool | |
void appTimer_Tick(object sender, EventArgs e)
{
//Reload the application content, if there is still an internet connection
if (NetworkHelper.InternetAccessIsAvailable())
{
UpdateContent();
}
//Update the timer to fire 24 hours from now
_appTimer.Interval = 86400000; //milliseconds in 24 hours
}
private void TestInternetConnection()
{
_internetAvailable = NetworkHelper.InternetAccessIsAvailable();
}
static void Main()
{
//Checking to see if logging is enabled.
GlobalVariables.LoggingEnabled = Settings.Default.LoggingEnabled;
GlobalVariables.GetApplicationVersion();
if (GlobalVariables.LoggingEnabled)
{
ExceptionManager.WriteInformation("Application starting.");
}
//Checking to see if the application is running
if (Mutex.WaitOne(TimeSpan.Zero, true))
{
if (GlobalVariables.LoggingEnabled)
{
ExceptionManager.WriteInformation("Checking internet connection.");
}
if (!NetworkHelper.InternetAccessIsAvailable())
{
MessageBox.Show(Resources.InternetRequiredMessage, Resources.InternetRequiredTitle, MessageBoxButtons.OK, MessageBoxIcon.Information);
if (GlobalVariables.LoggingEnabled)
{
ExceptionManager.WriteInformation("No internet connection. Application exiting.");
}
Environment.Exit(Environment.ExitCode);
}
else
{
//Application is not currently running and there is an available internet connection
//Check for updates
if (GlobalVariables.LoggingEnabled)
{
ExceptionManager.WriteInformation("Checking for application update.");
}
if (ApplicationUpdater.UpdateIsAvailable())
{
//Kick off the updater
var dlgResult = MessageBox.Show(Resources.UpdateQuestion, Resources.AnUpdateIsAvailable,
MessageBoxButtons.YesNo);
if (dlgResult == DialogResult.Yes)
{
//Need the 'runas' verb to allow admin privileges for update
var startInfo = new ProcessStartInfo("Updater.exe")
{
Verb = "runas"
};
Process.Start(startInfo);
}
else
{
Application.Run(new PicofDay());
}
}
else
{
Application.Run(new PicofDay());
}
}
}
else
{
//If application is already running and there is no internet connection available, close the application
if (GlobalVariables.LoggingEnabled)
{
ExceptionManager.WriteInformation("Application is already running. But there is no internet connection. Exiting the application.");
}
if (!NetworkHelper.InternetAccessIsAvailable())
{
MessageBox.Show(Resources.InternetRequiredMessage, Resources.InternetRequiredTitle, MessageBoxButtons.OK, MessageBoxIcon.Information);
Application.ExitThread();
}
}
}
/// <summary>
/// Overloaded GetImage that allows the retrieval of previous images based on their position in the XML document
/// provided from the nasa.gov website.
/// </summary>
/// <param name="selectedOffset">Position of the image within the node list of images, 1 being the very first (newest)</param>
/// <param name="selectedPage">Page number to retrieve the page that contains the selected image.</param>
public BackgroundImage GetImage(int?selectedOffset, int?selectedPage)
{
try
{
if (!NetworkHelper.InternetAccessIsAvailable())
{
throw new Exception("Attempted to retrieve image, but internet connection was not available.");
}
if (GlobalVariables.LoggingEnabled)
{
ExceptionManager.WriteInformation("Retrieving system screen resolution");
}
GetCurrentScreenResolution();
if (GlobalVariables.LoggingEnabled)
{
ExceptionManager.WriteInformation(string.Format("System screen resolution is: {0}", _currentScreenResolution));
}
if (selectedOffset == null)
{
selectedOffset = DefaultimageOffset;
}
//Get the JSON string data
if (GlobalVariables.LoggingEnabled)
{
ExceptionManager.WriteInformation("Preparing to download image information");
}
var nasaImages = JsonHelper.DownloadSerializedJsonData(string.Format(NasaLatestImagesUrl, selectedPage));
if (nasaImages == null || nasaImages.UberNodes.Length == 0)
{
throw new Exception("Unable to retrieve image data from JSON request");
}
//Get the image node
var imageId = nasaImages.UberNodes[(int)selectedOffset].UberNodeId;
var currentImageFullUrl = string.Format("{0}{1}.json", NasaApiUrl, imageId);
var currentImage = JsonHelper.DownloadImageData(currentImageFullUrl);
if (currentImage == null)
{
throw new Exception(string.Format("Unable to retrieve selected image: {0}", currentImageFullUrl));
}
if (GlobalVariables.LoggingEnabled)
{
ExceptionManager.WriteInformation("Selecting image based on current screen resolution");
}
switch (_currentScreenResolution)
{
case "100x75":
case "226x170":
currentImageFullUrl = string.Format("{0}{1}", NasaImageBaseUrl, currentImage.ImageData[0].LrThumbnail);
break;
case "346x260":
case "360x225":
case "466x248":
case "430x323":
currentImageFullUrl = string.Format("{0}{1}", NasaImageBaseUrl, currentImage.ImageData[0].Crop1X1);
break;
case "800x600":
currentImageFullUrl = string.Format("{0}{1}", NasaImageBaseUrl, currentImage.ImageData[0].Crop2X1);
break;
default:
currentImageFullUrl = string.Format("{0}{1}", NasaImageBaseUrl, currentImage.ImageData[0].FullWidthFeature);
break;
}
var localImageFolderPath = string.Format("{0}\\NASA\\PicOfTheDay", Environment.GetFolderPath(Environment.SpecialFolder.MyPictures));
if (!Directory.Exists(localImageFolderPath))
{
Directory.CreateDirectory(localImageFolderPath);
}
var imageName = currentImage.ImageData[0].FileName;
//Setting the full local image path to save the file
var fullImagePath = string.Format("{0}\\{1}", localImageFolderPath, imageName);
//Download the current image
if (GlobalVariables.LoggingEnabled)
{
ExceptionManager.WriteInformation(string.Format("Preparing to download image: {0}", currentImageFullUrl));
}
if (!DownloadHelper.DownloadImage(fullImagePath, currentImageFullUrl))
{
throw new Exception("Error downloading current image.");
}
//Create BackgroundImage object
var backgroundImage = new BackgroundImage
{
ImageUrl = currentImageFullUrl,
ImageDate = Convert.ToDateTime(currentImage.UberData.PromoDateTime),
ImageDescription = StripHtml(currentImage.UberData.Body),
DownloadedPath = fullImagePath,
ImageTitle =
!string.IsNullOrEmpty(currentImage.ImageData[0].Title)
? currentImage.ImageData[0].Title
: currentImage.UberData.Title
};
return(backgroundImage);
}
catch (Exception ex)
{
ExceptionManager.WriteException(ex);
return(null);
}
}