protected virtual void OnSelecting(CrmDataSourceSelectingEventArgs args)
{
EventHandler <CrmDataSourceSelectingEventArgs> handler = base.Events[EventSelecting] as EventHandler <CrmDataSourceSelectingEventArgs>;
if (handler != null)
{
handler(this, args);
}
}
protected override IAsyncResult BeginExecuteSelect(
DataSourceSelectArguments arguments,
AsyncCallback asyncCallback,
object asyncState)
{
Tracing.FrameworkInformation("CrmDataSourceView", "BeginExecuteSelect", "Begin");
if (CanSort)
{
arguments.AddSupportedCapabilities(DataSourceCapabilities.Sort);
}
if (CanPage)
{
arguments.AddSupportedCapabilities(DataSourceCapabilities.Page);
}
if (CanRetrieveTotalRowCount)
{
arguments.AddSupportedCapabilities(DataSourceCapabilities.RetrieveTotalRowCount);
}
string fetchXml;
QueryByAttribute query;
InitializeParameters(out fetchXml, out query);
// raise pre-event
CrmDataSourceSelectingEventArgs selectingArgs = new CrmDataSourceSelectingEventArgs(
Owner,
arguments,
fetchXml,
query);
OnSelecting(selectingArgs);
IEnumerable selectResult = null;
if (selectingArgs.Cancel)
{
Tracing.FrameworkInformation("CrmDataSourceView", "BeginExecuteSelect", "Cancel");
return(new SynchronousAsyncSelectResult(selectResult, asyncCallback, asyncState));
}
// merge event results
arguments.RaiseUnsupportedCapabilitiesError(this);
fetchXml = selectingArgs.FetchXml;
if (CancelSelectOnNullParameter && string.IsNullOrEmpty(fetchXml) && query == null)
{
Tracing.FrameworkInformation("CrmDataSourceView", "BeginExecuteSelect", "CancelSelectOnNullParameter");
return(new SynchronousAsyncSelectResult(selectResult, asyncCallback, asyncState));
}
try
{
_client = OrganizationServiceContextFactory.Create(Owner.CrmDataContextName);
if (!string.IsNullOrEmpty(fetchXml))
{
Tracing.FrameworkInformation("CrmDataSourceView", "BeginExecuteSelect: fetchXml", fetchXml);
var queryExpression = ToFetchExpression(arguments, fetchXml);
Tracing.FrameworkInformation("CrmDataSourceView", "BeginExecuteSelect", "End");
return(ExecuteSelect(_client, queryExpression, asyncCallback, asyncState));
}
if (query != null)
{
Tracing.FrameworkInformation("CrmDataSourceView", "BeginExecuteSelect", "QueryByAttribute");
// the SortExpression has high priority, apply it to the query
AppendSortExpressionToQuery(arguments.SortExpression, order => query.Orders.Add(order));
Tracing.FrameworkInformation("CrmDataSourceView", "BeginExecuteSelect", "End");
return(ExecuteSelect(_client, query, asyncCallback, asyncState));
}
}
catch (System.Web.Services.Protocols.SoapException ex)
{
Tracing.FrameworkError("CrmDataSourceView", "BeginExecuteSelect", "{0}\n\n{1}", ex.Detail.InnerXml, ex);
}
catch (Exception e)
{
Tracing.FrameworkError("CrmDataSourceView", "BeginExecuteSelect", "Exception: {0}", e);
_client = null;
return(new SynchronousAsyncSelectResult(e, asyncCallback, asyncState));
}
Tracing.FrameworkInformation("CrmDataSourceView", "BeginExecuteSelect", "End");
return(new SynchronousAsyncSelectResult(selectResult, asyncCallback, asyncState));
}