public bool Check(IUiInteraction uiProvider)
{
try
{
var value = ConfigurationManager.AppSettings[this.assemblyName + "-VersionCheck"];
bool doCheck;
if (bool.TryParse(value, out doCheck))
{
if (!doCheck)
{
return(true);
}
}
var myVersion = new VersionCheck();
var formatter = new XmlSerializer(typeof(VersionCheck));
var httpHelper = new HttpHelper(VersionBaseUrl, false)
{
UiDispatcher = uiProvider
};
var versionContentFromServer = httpHelper.GetContent(VersionXmlUrl, "[NOCACHE]");
if (!string.IsNullOrEmpty(versionContentFromServer))
{
var reader = new StringReader(versionContentFromServer);
var serverVersion = (VersionCheck)formatter.Deserialize(reader);
return(serverVersion.IsLessOrEqual(myVersion));
}
return(true);
}
catch
{
// catch simply all - if there's a problem, we will check next time
return(true);
}
}
/// <summary>
/// Performs a comparison of two version information structures by comparing
/// major and minor version and revision (1.2.3.4 vs. 4.5.6.7). Revision and
/// build will not be compared.
/// </summary>
/// <param name="greaterInstance">
/// the version to compare to
/// </param>
/// <returns>
/// true in case of this instance <= <paramref name="greaterInstance"/>
/// </returns>
public bool IsLessOrEqual(VersionCheck greaterInstance)
{
if (this.Major > greaterInstance.Major)
{
return(false);
}
if (this.Major < greaterInstance.Major)
{
return(true);
}
if (this.Minor > greaterInstance.Minor)
{
return(false);
}
if (this.Minor < greaterInstance.Minor)
{
return(true);
}
return(true);
}