c# WPF displaying a “dynamic” table

The data is kept in three tables in the UserRoleDataSet (Role, User and UserRole). This article describes a method many-to-many relations can be displayed and modified in a WPF datagrid control. Dynamic grid is implemented as user control that contains DataGrid control bound to observable collection of collections of cell view models. To use column-based grouping, you must bind the data grid to a CollectionView, and this is then bound to the data itself.

It also contains a Message property which should only be displayed in one column . It also contains a Header string which should be displayed as a header for that column. Similarly set the content of the buttons as insert, delete and reset text box. 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 (if the user has the role assigned or not) is returned.

Database Save Handling

Moreover, and at the contrast of the grid element, the Table element must be contained in one of those containers. Create the binding by setting the grid’s ItemSource property to inherit from the data context. 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.

This mechanism is used to add, remove and update the dynamic columns when the role table is modified. This article shows an implementation of dynamic column handling for WPF DataGrid controls. It is a straight forward MVVM implementation where the dynamic column handling is done in the view-model layer. The post is devoted to the WPF gridview with a dynamically-defined number of rows and columns but all cells have the same width and height. For example, such a grid could be used in chess or checkers games for 8×8 field. As an added bonus I added the functionality that the CheckBox control is not shown in the user data grid new item row.

Update collection of cell view models

This issue is solved by asynchronous method of updating current collection. Due to Wpf architecture and as dynamic grid user control item source is bound to Cells collection, all changes of this collection is done via Dispatcher. In the application priority DispatcherPriority.ApplicationIdle is used as it is executed after all data bindings, but other value could be used. 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. In the following post this issue is solved with asynchronous method that updates cell array.

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct. I would like to have tabs (dynamically created at runtime) and each tab should open a table with the same column headers but different contents. Keep in mind the TabItems and matching DataGrids are dynamic themselves, as is the number of columns and their contents.

Create table dynamically in WPF (VB.Net)

Since there is no such property in the UserTable definition, another solution has to be implemented. The DataGridCheckBoxColumn binds the check box control to a (nullable) boolean property of the data in the row that it is displaying. Instead of binding to the check box control, a value converter is instantiated and bound to the DataGridCell that will contain the CheckBox control.

The following code snippet demonstrates how to create a bar chart from the data table. With the JSON data converted into a data table, it is ready to be mapped into the WPF Charts control. You can now easily plot the values of the data table on different types of charts. And the green area has a fixed size with 3 columns, but new columns can be added. You can check more than 4 column table cells by scrolling the green area to the left or right.

Checkbox Column Style Handling

If you need WPF to populate datagrid, please refer to the following discussion on Microsoft’s Q&A blog. If I understand correctly SecondaryFile contains these two fields where https://traderoom.info/alpari-forex-broker/ Columns holds the headers of your DataGrid and data holds the rows. I tried giving the grids a name in a dynamic fashion so I can access it programmatically, but to no avail.

The data model of this sample consists of a User and a Role table, and a UserRole table that is the correlation table between the other two tables. An entry in the UserRole table means that the user has a role assigned (referenced by the role’s id). If there is no entry for a certain user-role combination, then that means that the user in question does not have the corresponding role assigned. The ObjectTag itself is a DependencyProperty that can be attached to any type of control that is derived from DependencyObject. 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. In this first part, I focus on the solution of handling dynamic columns.