protected virtual void ReadProductDescriptor(XPathNavigator navigator, out AutoUpdateProductDescriptor product)
{
product = new AutoUpdateProductDescriptor();
// if the element has attributs
if (navigator.HasAttributes)
{
// clone the current navigator so we can save our position
XPathNavigator attributesNavigator = navigator.Clone();
// move to the first attribute
if (attributesNavigator.MoveToFirstAttribute())
{
do
{
// parse the attributes from the test element
switch (attributesNavigator.Name)
{
case @"Version":
product.Version = new Version(attributesNavigator.Value);
break;
case @"RequiresRegistration":
product.RequiresRegistration = bool.Parse(attributesNavigator.Value);
break;
}
;
}while(attributesNavigator.MoveToNextAttribute());
}
}
// move inward to the first child
if (navigator.MoveToFirstChild())
{
do
{
switch (navigator.Name)
{
case @"Name":
product.Name = navigator.Value;
break;
}
;
}while(navigator.MoveToNext());
}
}
/// <summary>
/// Writes an Xml element containing AutoUpdateProductDescriptor specified
/// </summary>
/// <param name="product"></param>
protected virtual void WriteProductDescriptor(AutoUpdateProductDescriptor product)
{
Debug.Assert(product != null);
// start the element
_writer.WriteStartElement(product.GetType().Name);
XmlWriterUtils.WriteAttributes(_writer,
new XmlStringPair("Version", product.Version.ToString()),
new XmlStringPair("RequiresRegistration", product.RequiresRegistration.ToString()),
new XmlStringPair("Id", product.Id)
);
XmlWriterUtils.WriteCDataElement(_writer, "Name", product.Name, null);
// end the element
_writer.WriteEndElement();
}
/// <summary>
/// Writes an Xml element containing AutoUpdateProductDescriptor specified
/// </summary>
/// <param name="product"></param>
private void WriteProductDescriptor(AutoUpdateProductDescriptor product)
{
if (product == null)
{
throw new ArgumentNullException("product");
}
// start the element
_writer.WriteStartElement(product.GetType().Name);
XmlWriterUtils.WriteAttributes(_writer,
new XmlStringPair("Version", product.Version.ToString()),
new XmlStringPair("RequiresRegistration", product.RequiresRegistration.ToString()),
new XmlStringPair("Id", product.Id)
);
XmlWriterUtils.WriteCDataElement(_writer, "Name", product.Name, null);
// end the element
_writer.WriteEndElement();
}
/// <summary>
/// Writes an Xml element containing AutoUpdateProductDescriptor specified
/// </summary>
/// <param name="product"></param>
private void WriteProductDescriptor(AutoUpdateProductDescriptor product)
{
if (product == null)
throw new ArgumentNullException("product");
// start the element
_writer.WriteStartElement(product.GetType().Name);
XmlWriterUtils.WriteAttributes(_writer,
new XmlStringPair("Version", product.Version.ToString()),
new XmlStringPair("RequiresRegistration", product.RequiresRegistration.ToString()),
new XmlStringPair("Id", product.Id)
);
XmlWriterUtils.WriteCDataElement(_writer, "Name", product.Name, null);
// end the element
_writer.WriteEndElement();
}
/// <summary>
/// Instructs the AutoUpdateDownloader to query for the latest version available
/// </summary>
/// <param name="progressViewer">The progress viewer by which progress should be displayed</param>
/// <param name="options">The options that affect this downloader</param>
/// <param name="productToUpdate">The product descriptor for the product that should be updated</param>
/// <param name="updateAvailable">The download descriptor that describes the download that could potentially occur</param>
/// <returns></returns>
public override bool QueryLatestVersion(IProgressViewer progressViewer, AutoUpdateOptions options, AutoUpdateProductDescriptor productToUpdate, out AutoUpdateDownloadDescriptor updateAvailable)
{
updateAvailable = null;
try
{
// use the web service to query for updates
Debug.WriteLine(string.Format("Querying the 'Alternate Download Path' for the latest version of '{0}'.\n\tThe current product's version is '{1}'.\n\tThe current product's id is '{2}'.\n\tThe path is '{3}'.", productToUpdate.Name, productToUpdate.Version.ToString(), productToUpdate.Id, options.AlternatePath), MY_TRACE_CATEGORY);
XmlNode node = ManifestQueryEngine.QueryLatestVersionEx(options.AlternatePath, productToUpdate.Name, productToUpdate.Version.ToString(), productToUpdate.Id);
// if the service returned no results, then there is no update availabe
if (node == null)
{
// bail out
Debug.WriteLine(string.Format("No updates are available from the 'Alternate Download Path' at '{0}' for this product.", options.AlternatePath), MY_TRACE_CATEGORY);
return(false);
}
// otherwise create a reader and try and read the xml from the xml node returned from the web service
XmlAutoUpdateManifestReader reader = new XmlAutoUpdateManifestReader(node);
// using the reader we can recreate the manifeset from the xml
AutoUpdateManifest manifest = reader.Read();
/*
* now create a download descriptor that says, yes we have found an update.
* we are capable of downloading it, according to these options.
* the autoupdate manager will decide which downloader to use to download the update
* */
updateAvailable = new AutoUpdateDownloadDescriptor(manifest, this, options);
// just to let everyone know that there is a version available
Debug.WriteLine(string.Format("Version '{0}' of '{1}' is available for download.\n\tThe download url is '{2}'.\n\tThe size of the download is {3}.", updateAvailable.Manifest.Product.Version.ToString(), updateAvailable.Manifest.Product.Name, updateAvailable.Manifest.UrlOfUpdate, this.FormatFileLengthForDisplay(updateAvailable.Manifest.SizeOfUpdate)), MY_TRACE_CATEGORY);
return(true);
}
catch (ThreadAbortException)
{
}
catch (Exception ex)
{
throw new Exception(ex.Message, ex);
}
return(false);
}
protected virtual void ReadProductDescriptor(XPathNavigator navigator, out AutoUpdateProductDescriptor product)
{
product = new AutoUpdateProductDescriptor();
// if the element has attributs
if (navigator.HasAttributes)
{
// clone the current navigator so we can save our position
XPathNavigator attributesNavigator = navigator.Clone();
// move to the first attribute
if (attributesNavigator.MoveToFirstAttribute())
{
do
{
// parse the attributes from the test element
switch(attributesNavigator.Name)
{
case @"Version":
product.Version = new Version(attributesNavigator.Value);
break;
case @"RequiresRegistration":
product.RequiresRegistration = bool.Parse(attributesNavigator.Value);
break;
};
}
while(attributesNavigator.MoveToNextAttribute());
}
}
// move inward to the first child
if (navigator.MoveToFirstChild())
{
do
{
switch(navigator.Name)
{
case @"Name":
product.Name = navigator.Value;
break;
};
}
while(navigator.MoveToNext());
}
}
