wpf datagrid dynamic column and row DevExpress Support

Windows Forms was the preferred option for developing a desktop Windows application until .NET 3.0, when Microsoft added WPF to the .NET stack of frameworks. WPF added many improvements over Windows Forms, but most significantly, it added better data binding, styling, and performance enhancements. WPF was the first .NET platform to use XAML with a datagrid among its core UI components. The post showcases a WPF datagrid with dynamic columns where the number of rows and columns is defined but all cells have the same size. A converter is used to get this information and it is mapped to the CheckBox’s Visibility flag.

Editing data

As an added bonus I added the functionality that the CheckBox control is not shown in the user data grid new item row. The DataGridCheckBoxColumn style has to be modified, and the Visibility flag of the CheckBox has to be set, depending on the contents of the DataGridCell. The post is devoted to the Wpf datagrid with cells that have defined fixed size but a number of rows and columns is updated dynamically in order to fill all available space. For example, such grid could be used in games at infinite 2D field or implementation of cellular automaton. There is an issue with binding to view size – as bindings are executed in single thread, new values of view width and height come in different moments.

This reapplies the page logic producing a next page response which includes the next page of data. For all the examples in the project it is produced using the following code. My first solution was to create a node which applied a filter to find its children and in turn each child also applied a filter to find its children.

Visual Controls

Now you can edit, add or remove data from Flexgrid, which will dynamically update to the FlexChart. Add C1FlexChart and C1FlexGrid to the view, bound their ItemsSources and respective properties. Now, create a ViewModel named DataViewModel, which will connect to the View. We can create some properties and methods in ViewModel which can be bound to the view. The AutoPopulateRelations property does not work on dynamic object types. Complex Property Binding feature is useful when the user has nested data, i.e., when data of one table is mapped to another table.

1. It has become my custom to start each post with an image then I explain how I got there.
2. In this case I added a new behavior that is attached to the data grid called DataGridBeginningEditBehavior.
3. This section provides a tutorial on using the third-party FlexGrid control from MESCIUS for comparison.
4. For Size property, for example, the grid populates two columns namely, “Size.Width” and “Size.Height”.
5. The AutoPopulateRelations property does not work on dynamic object types.
6. However, there is also a good use for that scenario, such as adding custom columns to your data source.

For example, such a grid could be used in chess or checkers games for 8×8 field. GridData control provides support to bind to complex properties through the Complex Property Binding feature. A Complex Property is one that contains multiple values, for example, an object of type “size” which contains two values – Width and Height, is represented as one property. Such complex properties are displayed in grid columns in the “Property.Member” format.

The value converter’s Convert method is called, every time the DataGrid cell is initially modified or lost its focus. In both cases, the user and the role roles are retrieved and the conversion result is returned. For example, the ComponentOne FlexGrid is a cross-platform .NET datagrid with a WPF version that supports .NET Framework 4.6.2 up through .NET 8 as of this writing. It supports the same production-ready features as the WPF DataGrid control but also accelerates C# development with all the built-in features listed above.

Comments On adding Right

The grid can be bound to user-defined collections that let you store arbitrary objects in a structured fashion. The data binding is based on a set of interfaces that https://traderoom.info/displaying-data-in-tables-with-wpf-s-datagrid/ differ in the context of accessing and navigating through data and of course manipulating the data. These interfaces set up a two-way communication between the bound grid and the objects collection used by the same grid.

To tell the control, which properties of the data source contain row / header information, you assign the first two delegates (columnSelector / rowSelector). When designing WPF screens, sometimes it may be necessary to create a new Grid with number of rows and/or columns set dynamically. The best way to align a grid splitter is to place it in its own auto-sized column. To ensure that the grid splitter changes the size of the previous and next cell you have to set the ResizeBehavior to PreviousAndNext.

For ease of use, .NET provides built-in, ready-to-use collection classes that internally implements these collection interfaces. An ObjectDataProvider is a class which creates an object that you can use as a binding source. The GridData control supports this class (offered by WPF platform) that creates an object in the XAML code and can be used for data binding. The ObjectDataProvider allows you to specify binding expressions against an object and its methods. In this method you could then bind the Command property of the created CheckBox control to the DelegateCommand of the view model. In the code below, a System.Windows.Data.RelativeSource object is used to describe the location of the binding source (the window) relative to the position of the binding target (the CheckBox).

For example, if you add another row to the Group database table, you want another column representing this new group to show up in the DataGrid without any changes to the code. This is not always the best approach to take – you will usually be using DataAdapters and DataTables to retrieve information from a database, or external files, and bind it to a datagrid. In the code-behind class, we have create a class ‘Employee’ which has properties of different types like int, string, bool, enum, Uri, DateTime. Then we have created an ObservableCollection of Employee class and create three sample employee type and bind ObservableCollection to DataGrid in the ItemsSource property. Values of color properties are assigned to corresponding properties of CellView control. View model for each cell implements ICellViewModel interface that defines property for data model that implements ICell interface and command for changing state for the cell.

GDC supports the following data sources such as, Data Tables, Data Sets or Custom collections of type List, Binding List, Observable Collection or Collection View Source. These data source can have multiple nested tables that is displayed hierarchically by the grouping grid. A WPF datagrid is a user interface control for displaying, editing, and analyzing large data sets within a Windows desktop application. You can think of a datagrid like a spreadsheet table with features like column sorting, column resizing, and built-in cell editing bound to your data source. WPF (Windows Presentation Foundation) is a .NET framework for developing modern desktop applications with C# or VB.NET code. ADO.NET is an object-oriented set of libraries that allows you to interact with different types of data sources and different types of databases.

As number of rows and columns are integers, real size of cells on the view could not equal to values of cell width and height. After new cells set is created, collection of cell view models should be updated. In the previous post, this collection was recreated each time and it leads to application hangs. Dynamic grid is implemented as user control that contains DataGrid control bound to observable collection of collections of cell view models. In this implementation, collection of cells is recreated each time if grid width or grid height is changed, and it leads to some application pauses.

1. Essential Grid supports addition of extra columns to the data source columns.
2. However, this method will only receive the Boolean value (value argument) of the IsChecked property of the CheckBox and the Group object (parameter argument).
3. This is the key step so that when data changes by FlexGrid, the View (which also contains FlexChart) will be notified.
4. The value of the property specified by the Path property of the Binding property of the DataGridCheckBoxColumn determines whether the generated CheckBox control will be checked or unchecked.
5. In the previous post, this collection was recreated each time and it leads to application hangs.
6. All of our WPF demos are included in a single downloadable desktop explorer.

Operations like sorting, filtering, grouping, summaries and conditional formatting can now be applied on these dynamic values bound to the underlying source. It uses LINQ Functional Expressions to be dynamically evaluated at run time, and thus only strongly-typed source can be used with this feature. The GridData control provides support to keep any Selector-derived control synchronized with its current selection. If you change the current record in the grid, then the current selection of the other control also shifts to this new position and vice versa. It is obvious that the controls should be bound to the same data source.

The following line in the above code references the Object (Order), which returns the data for binding. This is a basic example of a way to allow merging/splitting of grid cells in a WPF application. Users can apply conditional formatting at runtime using the built-in menus from the pivot panel.