Aspose.Tasks for .NET 22.3 Release Notes

All Changes

Public API and Backwards Incompatible Changes

Examples and additional notes

.NET Framework 2.0 deprecation notice

Starting with ver. 22.9 (September 2022) Aspose.Tasks for .NET will no longer support .NET Framework 2.0.

Notes on support of .NET 6.0 in *nix environment

Related issue: TASKSNET-10429, Fix exception when opening MPP file in projects targeting .NET 6.0 in *nix environment

As a step in adding of support .NET 6.0 in *nix environment we are replacing property TextStyle.FontFamily (Type: System.Drawing.FontFamily) with property TextStyle.Font (Type: Aspose.Tasks.Visualization.FontDescriptor). The rendering (when project’s view is saved to a graphical format) is not supported at the moment because it relies on System.Drawing.Common. See [Microsoft post|https://docs.microsoft.com/en-us/dotnet/core/compatibility/core-libraries/6.0/system-drawing-common-windows-only] for more details.

Related issue: TASKSNET-10310 - Add cancellation token support for Project loading operation

Now CancellationToken can be specified to allow cancellation of long project loading operation (not applicable to versions for .NET Framework 2.0 and 3.5):

CancellationTokenSource cts = new CancellationTokenSource();

var loadOptions = new LoadOptions() { CancellationToken = cts.Token };
Project p = new Project("test.mpp", loadOptions);

Related issue: TASKSNET-10480 - Add an API to set user-specified callback which allows to substitute absent fonts when a project is rendered to a graphical format

The user can use any font to customize View’s text styles using MS Project. When the project is saved, the font information (actually a font name and size) is persisted to MPP file. Sometimes the resulting MPP file is opened on another environment where the specified font may be missing. To address this issue we introduced FontResolveCallback which can be used to intercept font resolving event. The callback is invoked when the project’s view is saved to a graphical format and the rendering engine resolves a font to render a text.

Project project = new Project("Input.mpp");
PdfSaveOptions so = new PdfSaveOptions();
so.PresentationFormat = PresentationFormat.GanttChart;
so.Timescale = Timescale.DefinedInView;
so.FontResolveCallback = delegate(FontResolveEventArgs args)
{
    if (args.RequestedFontName  != args.ResolvedFontName)
    {
        // Looks like the exact font cannot be found and fallback font was resolved.
        // We can override the fallback font.
        args.ResolvedFontName = "Arial";
    }

    // Or simply substitute the specific font:
    if (args.RequestedFontName == "Comic Sans MS")
    {
        args.ResolvedFontName = "Arial";
    }
};

project.Save("Output.pdf", so);

The API for Extended attributes were improved. The previous ExtendedAttributeDefinition API where ExtendedAttributeDefinition.CalculationType should be one of the following: { None, Lookup, Rollup, Calculation } didn’t reflect all the cases such as extended attribute where values for leaf tasks are calculated using formula and values of the summary tasks are calculated using rollup. ExtendedAttributeDefinition.SummaryRowsCalculationType property (with values None, Rollup, UseFormula) was added to reflect MS Project’s model of extended attribute’s settings. ExtendedAttributeDefinition.CalculationType’s values are now limited to (None, Lookup, Formula) values.

The following example creates an extended attribute which values for leaf tasks are calculated using formula and values for summary tasks are calculated using average rollup:

var project = new Project("Test.mpp");
var definition = ExtendedAttributeDefinition.CreateTaskDefinition(ExtendedAttributeTask.Cost1, "Calculated cost");
definition.CalculationType = CalculationType.Formula;
definition.Formula = "[Cost] * 3.14";
definition.SummaryRowsCalculationType = SummaryRowsCalculationType.Rollup;
definition.RollupType = RollupType.Average;

project.ExtendedAttributes.Add(definition);

project.Save("Output.mpp");

In order to optimize calendar-related calculations WorkingTime class was made immutable (so properties cannot be modified after object is created). Also 2 new overloads of constructor of WorkingTime class were added to allow less verbose creation of WorkingTime:

22.2 version:

WorkingTime wt = new WorkingTime(new DateTime(1, 1, 1, 9, 0, 0), new DateTime(1, 1, 1, 12, 0, 0));
WorkingTime wt2 = new WorkingTime(new DateTime(1, 1, 1, 9, 15, 0), new DateTime(1, 1, 1, 12, 15, 0));

WorkingTime wt = new WorkingTime(9, 12);
WorkingTime wt2 = new WorkingTime(new TimeSpan(9, 15, 0), new TimeSpan(12, 15, 0));