ClickOnce Programmatic deployment checks for updates if there is a failure in the middle of an update

Question

Hi,
I am using ClickOnce deployment APIs in C#.
The application is checked not to "Check for updates". Unfortunately, due to some slow internet connectivity issues the deployments sometimes fail.
When such a scenarios happens, the next time the application is restarted it will prompt the "There was an update" dialog even though the Project ClickOnce settings are set not to check for updates.
I couldn't find any solutions or documentation. Any help would be appreciated!
This is my code:
if (IsUpdated())
nextProgress = 0;
logger.Info("Found new version! UPDATING...");
applicationDeployment.UpdateAsync();
// We use this instead of applicationDeployment.CheckForUpdate(false) because applicationDeployment.CheckForUpdate(false)
// Is limited to a few hundred calls only (Microsoft BUG: http://social.msdn.microsoft.com/Forums/en-US/winformssetup/thread/d9183f7e-f5c7-46d0-8bb4-411ad923976c)
int checkUpdateError = 0;
private DateTime _lastCheck = DateTime.MinValue;
public bool IsUpdated()
try
var customVersionUrl = System.Configuration.ConfigurationManager.AppSettings["CustomVersionUrl"];
var manifestFile = GetIfModifiedtSince(customVersionUrl != null ? customVersionUrl : TBXConfigurationManager.Settings["VersionURL"], _lastCheck);
if (manifestFile != string.Empty)
var xdoc = XDocument.Parse(manifestFile);
XNamespace nsSys = "urn:schemas-microsoft-com:asm.v1";
var version = new Version(xdoc.Descendants(nsSys + "assemblyIdentity").First().Attribute("version").Value);
_lastCheck = DateTime.Now.AddMinutes(-10);
if (version != ApplicationDeployment.CurrentDeployment.CurrentVersion)
// update application
return true;
checkUpdateError = 0;

Answer 1

Hi uriab,
As you said that, you have something wrong when you update the Version of application. Due to the network, I'm afraid you have missing something important for the updation version.
I suggest you uninstall the older version, then reinstall the lastest version from the server.
And also here is a MSDN article about How to Check for Application Updates Programmatically Using the ClickOnce Deployment API.
#How to: Check for Application Updates Programmatically Using the ClickOnce Deployment API
https://msdn.microsoft.com/en-us/library/ms404263.aspx
If you have any other concern regarding this issue, please feel free to let me know.
Best regards,
Youjun Tang
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