xamgantt listbackedprojectviewprovider

140

flavio cozzi posted over 6 years ago

Hi,
i'm loading data in my xamgantt through a ListBackedProjectViewProvider, in which i defined custom views, tables and
columns. After the tasks insertion, the gantt shows always the tasks in cronological order, regardless of
the ordering i'm giving. I've also added a button that refresh the module,
and after clicking it the tasks are ordered in the right way (from the first i added to the last).
What can the problem be? Are there some project attributes i should look for?

Thanks.

29105

Offline Michael DiFilippo posted over 6 years ago in reply to flavio cozzi

Hello Flavio,

Thank you for following and providing a sample. Since the XamGantt does not have a way to programmatically sort, and only a way to clear the sorts set by the user you will need to manually sort a collection bound to the XamGantt.

Note, I don't see any implementation of ListBackedProject in your sample, only tasks added manually. This won't work since the tasks in your sample will be listed by the gantt in the order they were added to the project.

I strongly recommend implementing custom task collection, with an observablecollection and property mappings demonstrated in the following topic ==>

https://es.infragistics.com/help/wpf/xamgantt-binding-arbitrary-tasks-collection-listbackedproject

From there you can use Linq and query your tasks based on the start date.

eg. Collection = new ObservableCollection(Collection.OrderBy(x=>x.StartDate).ToList());

Let me know if you have any questions.
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140

Offline flavio cozzi posted over 6 years ago in reply to Michael DiFilippo

Hello Michael,
i've attached an example of what i'm saying (without the refresh logic because is not needed here).
The tasks appears in the order i'm deciding, not by their start-end date.
What i've to ask you is: in some cases can this behaviour be overrided by some project property, that, as you were saying,
does not care about the order i'm giving and only shows tasks ordered by their start date?

Thanks, Flavio

SimpleGantt.zip

29105

Offline Michael DiFilippo posted over 6 years ago

Hello Flavio,

Thank you for contacting Infragistics.

Please provide a sample application demonstrating the issue and success when refreshing the module. I'd like to debug the logic you are using in your refresh button.

Note, the Gantt should order the tasks based on their designated start and end times, but configuring the sort order programmatically is not possible and can only be controlled by the end user at runtime.

A list of configurable commands can be found on this ==> online documentation.

You may submit a new product idea for sorting programmatically.

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