/// <summary>
/// Prepares the Query UI and executes a WQL query via a new ManagementQueryBroker.
/// </summary>
/// <param name="query">The WQL query to execute.</param>
private void ExecuteQuery(String query)
{
// Reset UI
this.ResetQueryResults();
this.ToggleQueryUI(true);
this.Log(LogLevel.Information, String.Format("Executing query: {0}", query));
try
{
// Prepare the query broker
this.queryBroker = new ManagementQueryBroker(this.txtQuery.Text, this.CurrentNamespaceScope);
this.queryBroker.ObjectReady += new BrokerObjectReadyEventHandler(this.OnQueryResultReady);
this.queryBroker.Completed += new BrokerCompletedEventHandler(this.OnQueryCompleted);
// Init the grid view
this.InitQueryResultGrid(this.queryBroker.ResultClass, query);
// Fetch results
this.queryBroker.ExecuteAsync();
}
catch (Exception e)
{
bool hasCode = false;
UInt32 code = 0;
if (e.GetType() == typeof(COMException))
{
hasCode = true;
code = (UInt32) ((COMException)e).ErrorCode;
}
else if(e.GetType() == typeof(ManagementException))
{
hasCode = true;
code = (UInt32) ((ManagementException)e).ErrorCode;
}
if (hasCode && Enum.IsDefined(typeof(ManagementError), code))
{
var constant = ((ManagementError)code).ToString();
this.Log(LogLevel.Critical, String.Format("Query execution failed with {0:G} (0x{0:X}) {1}", code, constant));
var description = ErrorCodes.ResourceManager.GetString(constant);
if (!String.IsNullOrEmpty(description))
this.Log(LogLevel.Information, description);
}
else
{
this.Log(LogLevel.Critical, String.Format("Query execution failed with: {0}", e.Message));
}
// Generic exceptions may not trigger a 'Completed' event
this.ToggleQueryUI(false);
}
}
/// <summary>
/// Refreshes the query tab for the specified ManagementClass.
/// </summary>
/// <param name="c">The System.Management.ManagementClass to be displayed.</param>
/// <remarks>Cancels any currently running queries.</remarks>
private void RefreshQueryView(ManagementClass c)
{
// Stop an existing query
if (this.queryBroker != null)
{
this.queryBroker.Cancel();
}
if (c != null)
{
var query = c.GetDefaultQuery();
this.txtQuery.Text = query;
this.queryBroker = new ManagementQueryBroker(query, this.CurrentNamespaceScope);
InitQueryResultGrid(c, query);
}
}