DeploymentDownloadException Class

 

Indicates that there was an error downloading either the ClickOnce manifests or the deployment's files to the client computer.

Namespace:   System.Deployment.Application
Assembly:  System.Deployment (in System.Deployment.dll)

System.Object
  System.Exception
    System.SystemException
      System.Deployment.Application.DeploymentException
        System.Deployment.Application.DeploymentDownloadException

[SerializableAttribute]
public class DeploymentDownloadException : DeploymentException

NameDescription
System_CAPS_pubmethodDeploymentDownloadException()

Initializes a new instance of the DeploymentDownloadException class.

System_CAPS_protmethodDeploymentDownloadException(SerializationInfo, StreamingContext)

Initializes a new instance of the DeploymentDownloadException class.

System_CAPS_pubmethodDeploymentDownloadException(String)

Initializes a new instance of the DeploymentDownloadException class with a message that describes the exception.

System_CAPS_pubmethodDeploymentDownloadException(String, Exception)

Initializes a new instance of the DeploymentDownloadException class.

NameDescription
System_CAPS_pubpropertyData

Gets a collection of key/value pairs that provide additional user-defined information about the exception.(Inherited from Exception.)

System_CAPS_pubpropertyHelpLink

Gets or sets a link to the help file associated with this exception.(Inherited from Exception.)

System_CAPS_pubpropertyHResult

Gets or sets HRESULT, a coded numerical value that is assigned to a specific exception.(Inherited from Exception.)

System_CAPS_pubpropertyInnerException

Gets the Exception instance that caused the current exception.(Inherited from Exception.)

System_CAPS_pubpropertyMessage

Gets a message that describes the current exception.(Inherited from Exception.)

System_CAPS_pubpropertySource

Gets or sets the name of the application or the object that causes the error.(Inherited from Exception.)

System_CAPS_pubpropertyStackTrace

Gets a string representation of the immediate frames on the call stack.(Inherited from Exception.)

System_CAPS_pubpropertyTargetSite

Gets the method that throws the current exception.(Inherited from Exception.)

NameDescription
System_CAPS_pubmethodEquals(Object)

Determines whether the specified object is equal to the current object.(Inherited from Object.)

System_CAPS_protmethodFinalize()

Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection.(Inherited from Object.)

System_CAPS_pubmethodGetBaseException()

When overridden in a derived class, returns the Exception that is the root cause of one or more subsequent exceptions.(Inherited from Exception.)

System_CAPS_pubmethodGetHashCode()

Serves as the default hash function. (Inherited from Object.)

System_CAPS_pubmethodGetObjectData(SerializationInfo, StreamingContext)

Sets the SerializationInfo with information about the exception.(Inherited from DeploymentException.)

System_CAPS_pubmethodGetType()

Gets the runtime type of the current instance.(Inherited from Exception.)

System_CAPS_protmethodMemberwiseClone()

Creates a shallow copy of the current Object.(Inherited from Object.)

System_CAPS_pubmethodToString()

Creates and returns a string representation of the current exception.(Inherited from Exception.)

NameDescription
System_CAPS_proteventSerializeObjectState

Occurs when an exception is serialized to create an exception state object that contains serialized data about the exception.(Inherited from Exception.)

A DeploymentDownloadException can indicate that a number of problems occurred when the user tried to download a ClickOnce application update:

  • The client's computer's network connection is down.

  • The Web server, FTP server, or file share hosting the update is unavailable.

  • 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 void InstallUpdateSync()
{
    if (ApplicationDeployment.IsNetworkDeployed)
    {
        Boolean updateAvailable = false;
        ApplicationDeployment ad = ApplicationDeployment.CurrentDeployment;

        try
        {
            updateAvailable = ad.CheckForUpdate();
        }
        catch (DeploymentDownloadException dde)
        {
            // This exception occurs if a network error or disk error occurs
            // when downloading the deployment.
            MessageBox.Show("The application cannt check for the existence of a new version at this time. \n\nPlease check your network connection, or try again later. Error: " + dde);
            return;
        }
        catch (InvalidDeploymentException ide)
        {
            MessageBox.Show("The application cannot check for an update. The ClickOnce deployment is corrupt. Please redeploy the application and try again. Error: " + ide.Message);
            return;
        }
        catch (InvalidOperationException ioe)
        {
            MessageBox.Show("This application cannot check for an update. This most often happens if the application is already in the process of updating. Error: " + ioe.Message);
            return;
        }

        if (updateAvailable)
        {
            try
            {
                ad.Update();
                MessageBox.Show("The application has been upgraded, and will now restart.");
                Application.Restart();
            }
            catch (DeploymentDownloadException dde)
            {
                MessageBox.Show("Cannot install the latest version of the application. Either the deployment server is unavailable, or your network connection is down. \n\nPlease check your network connection, or try again later. Error: " + dde.Message);
            }
            catch (TrustNotGrantedException tnge)
            {
                MessageBox.Show("The application cannot be updated. The system did not grant the application the appropriate level of trust. Please contact your system administrator or help desk for further troubleshooting. Error: " + tnge.Message);
            }
        }
    }
}

.NET Framework
Available since 2.0

Any public static ( Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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