if (!kyr.networkIsUp()) {
MessageBox.Show("You currently are not connected to the Internet.", "Cannot check for update");
return;
}
string msg = string.Empty;
string pathLastSuccessfullyCheckedForUpdate = Path.Combine(specFldrAppData, "lastUpdateCheck.txt");
if (System.IO.File.Exists(Path.Combine(specFldrAppData + "updateURL.txt"))) {
try {
updateToolStripMenuItem.Enabled = false;
Cursor = Cursors.WaitCursor;
this.Text = "Checking for update...";
string url = string.Empty;
using (StreamReader sr
= new StreamReader
(Path
.Combine(specFldrAppData
+ "updateURL.txt"))) { url = sr.ReadLine();
}
WebClient client
= new WebClient
(); try {
client.DownloadFile(url, specFldrAppData + "temp.txt");
} catch (Exception exFailedToObtain) {
MessageBox.Show("Unable to obtain update info from website at this time. Please try again later." +
Environment.NewLine + Environment.NewLine + exFailedToObtain.Message, "Try Again Later");
updateToolStripMenuItem.Enabled = true;
Cursor = Cursors.Default;
this.Text = appTitle;
return;
}
client
.DownloadProgressChanged += new DownloadProgressChangedEventHandler
(client_DownloadProgressChanged
); string downloadURL = string.Empty;
string[] parts;
using (StreamReader sr
= new StreamReader
(Path
.Combine(specFldrAppData,
"temp.txt"))) { parts = sr.ReadLine().Split('|');
string newest = parts[1].Trim();
parts = sr.ReadLine().Split('|');
downloadURL = parts[1].Trim();
pathToOnlineZippedInstaller = downloadURL;
parts = sr.ReadLine().Split('|');
expectedDownloadSize = Convert.ToInt32(parts[1]);
if (String.Compare(Application.ProductVersion.ToString(), newest) < 0) {
if (blnLoadedPrayerHasBeenModified) {
msg = "A loaded prayer has been modified. Discard it and download the available installer for an updated version of this application?";
if (DialogResult.No == MessageBox.Show(msg, "Discard modified prayer and download update?", MessageBoxButtons.YesNo, MessageBoxIcon.Question, MessageBoxDefaultButton.Button2)) {
return;
}
} else {
clearMyPrayerFields();
}
if (blnWorkingOnNewPrayer) {
msg = "You're currently working on a new prayer. Discard it and download the available installer for an updated version of this application?";
if (DialogResult.No == MessageBox.Show(msg, "Discard modified prayer and download update?", MessageBoxButtons.YesNo, MessageBoxIcon.Question, MessageBoxDefaultButton.Button2)) {
return;
}
} else {
clearMyPrayerFields();
}
versionDownloading = "v" + newest;
this.Text = "Downloading newest version " + versionDownloading;
downloadProgress.Value = 0;
downloadFullpath = Path.Combine(pathToDesktop, Path.GetFileName(downloadURL));
tmrDownload.Enabled = true;
presentMyPrayersPanel();
myPrayersInterfaceToolStripMenuItem
.Checked = true; tmrDownload.Start();
_downloadUpdateBegins = DateTime.Now;
blnDownloadingUpdateInstaller = true;
client
.DownloadFileAsync(new Uri
(downloadURL
), downloadFullpath
); } else {
using (StreamWriter sw
= new StreamWriter
(pathLastSuccessfullyCheckedForUpdate
)) { sw.WriteLine(DateTime.Now.ToString());
}
this.Text = appTitle;
if (myPrayersInterfaceToolStripMenuItem
.Checked) { this.Text += " (\"My Prayers\" interface) ";
}
MessageBox.Show("You are using the most recent version of the program: " +
Application.ProductVersion.ToString(), "No update is currently available");
this.Text = appTitle;
}
}
} catch (Exception exUpdate) {
updateToolStripMenuItem.Enabled = true;
blnDownloadingUpdateInstaller = false;
Cursor = Cursors.Default;
string errMsg = exUpdate.Message;
if ((exUpdate.Message.Contains("outside the bounds")) || (exUpdate.Message.Contains("remote name could not be resolved"))) {
errMsg = "\"Prayer Minder\" was unable to connect to the download server to check for an available update at this time.";
}
MessageBox.Show(errMsg, "Error while seeking available program update");
}
finally {
}
} else {
MessageBox.Show("\"Prayer Minder\" couldn't retrieve the URL to look for updates. Please contact the programmer.", "Failed to obtain update info");
}
updateToolStripMenuItem.Enabled = true;
Cursor = Cursors.Default;
}
Recent Posts
) I submit that my particular example is not impossible to code against, as you have correctly stated. But it was only offered as an example of something that at first seems easy enough, but really is beginning to enter the area of subjective coding. Perhaps I should have used an example with a less-limited problem-space.