DeploymentDownloadException Class
Assembly: System.Deployment (in system.deployment.dll)
'Declaration <SerializableAttribute> _ Public Class DeploymentDownloadException Inherits DeploymentException 'Usage Dim instance As DeploymentDownloadException
/** @attribute SerializableAttribute() */ public class DeploymentDownloadException extends DeploymentException
SerializableAttribute public class DeploymentDownloadException extends DeploymentException
Not applicable.
A DeploymentDownloadException can indicate that a number of problems occurred when the user tried to download a ClickOnce application update:
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The client's computer's network connection is down.
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The Web server, FTP server, or file share hosting the update is unavailable.
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One or more of the files in the ClickOnce deployment was not found.
To obtain detailed error information about an exception, consult the ClickOnce error log. For more information, see Troubleshooting ClickOnce Deployments.
The following code example installs an application update synchronously, and reports to the user if there was a problem downloading either the manifests or the deployment's files.
Private Sub InstallUpdateSync() If (ApplicationDeployment.IsNetworkDeployed) Then Dim updateAvailable As Boolean = False Dim AD As ApplicationDeployment = ApplicationDeployment.CurrentDeployment Try updateAvailable = AD.CheckForUpdate() Catch dde As DeploymentDownloadException ' This exception occurs if a network error or disk error occurs ' when downloading the deployment. MessageBox.Show("The application cannot check for the existence of a new version at this time. " + ControlChars.Lf + ControlChars.Lf + "Please check your network connection, or try again later. Message: " + dde.Message) Exit Sub Catch ide As InvalidDeploymentException MessageBox.Show("The application cannot check for an update. The ClickOnce deployment is corrupt. Please redeploy the application and try again. Message: " + ide.Message) Exit Sub Catch ioe As InvalidOperationException MessageBox.Show("The application cannot check for an update. This most likely happened because the application is already updating. Message: " + ioe.Message) Exit Sub End Try If (updateAvailable) Then Try AD.Update() MessageBox.Show("The application has been upgraded, and will now restart.") Application.Restart() Catch dde As DeploymentDownloadException MessageBox.Show("Cannot install the latest version of the application. " + ControlChars.Lf + ControlChars.Lf + "Please check your network connection, or try again later.") End Try End If End If End Sub
System.Exception
System.SystemException
System.Deployment.Application.DeploymentException
System.Deployment.Application.DeploymentDownloadException
Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.