WPF Dynamically Generated DataGrid

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The post demonstrates Wpf data grid with dynamically defined number of rows and columns but all cells has the same size. Download application - The post is devoted to the Wpf data grid with dynamically defined number of rows and columns but all cells has the same width and the same height. For example, such grid could be used in chess or checkers games for 8x8 field. Wpf application is done in MVVM pattern with one main window.

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 dynamically binding columns to gridview following post this issue is solved with asynchronous method that updates cell array.

Also, other implementation for cells could be used; for example, 2-dimensional array of cells ICellViewModels[][] works well. 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.

The same height of cells is controlled by RowHeight property defined in style of Dynamically binding columns to gridview. Cell height equals to actual height of dynamically binding columns to gridview grid minus 2 divided by number of rows. The same width of cells is controlled by Width property of cell data template:.

Similarly, cell width equals to actual width of data grid minus 2 divided by number of columns. And there is a definition of DataGrid control:. Grid with dynamic number of rows and columns, part 1 by Illya Reznykov.

Source code Download application - Application has the following features: Background Solution uses C dynamically binding columns to gridview. The same width of cells is controlled by Width property of cell data template: And there is a definition of DataGrid control: Wpf application with real-time data in OxyPlot charts. Stay informed - subscribe! Join our newsletter and get the latest content right in your inbox once or twice per week. Now you will get awesome news!

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Is there a way to dynamically create a grid's from the List and make it clickable on the PCL project using mvvm? MikeDennis - The way you would do this, is create a new control you can use this: Create new Xaml Page and replace with this.

This was based on ChaseFlorell 's GridView so the credit goes to him for this. Apologies if my memory is incorrect there. MikeDennis - Apologies on the SetBinding, the item you are binding to should be passed as a string and is used to find a property on the BindingContext ViewModel to bind it to. Though if you are using Visual Studio and have access to C 6 features I like the nameof command to help with that compile time checking.

Found the following errors with the code which you shared above 1. The type or namespace name 'DocumentTypeTemplate' could not be found are you missing a using directive or an assembly reference? The name 'InitializeComponent' does not exist in the current context 3. No Data's are displayed on the UI. MikeDennis - the TypeTemplate is just a template, can be called anything. Its a new xaml page and replace with.

AdamP - for the clarification Now what typeTemplate should I create and where should I place the command event and how to define which items on the list to be displayed? MikeDennis - the click is defined on the gridview not on the template.

That is what the ClickCommand is. The Template is just what you want displayed in each tile. You can put anything you want in that Grid. This is the template that gets applied to each element of the list.

So Binding to Name, Id, Frequency will get you those values. AdamP AdamP i tried with what you said as a result it shows an empty page with no data: But TypeTemplate page is never getting initialized, is there any sample which you can share with me.

MikeDennis - BuildTiles is what should be called when you assign your list to it, then within here is where it calls BuildTile, at that point you can see it create a new ItemTemplate, this is where the constructor will be called. If the constructor isn't been called, then BuildTiles isn't calling it.

Breakpoint your code and step through and see why is doesn't get there. AdamP do you have any samples? MikeDennis - what I shared with you was a sample. What did debugging your app find out?

Is the BuildTiles function being called? AdamP finally figured out the issue. Is there a way to fix both the above issue? AdamP Solved all the above issue. Grid doesn't get's updated if the data is updated on the binding element, also its not displaying the other elements in the stacklayout. Solved all the above problem except the dataBinding update for the second time.

Thanks for your above suggestions, helped a lot in sketching the bindable grid view. MikeDennis - if you want to use it programmatically you can just go. You just need to add to a control that already exists on the page. If nothing exists you can just do. How to bind the element to the Itemsource? AdamP i tried with the following code: MikeDennis - you need to do this. MikeDennis - are you still assigning to ItemsSource? AdamP is there a way i can add multiple selection to the grid view and return a list?

AdamP you should win the Oscar of patience, instead of Leo. MikeDennis - Yes you can make it multiple selection. The easiest way I can think of is, adding a new property to the Items that you are binding, something like.

Then on the ClickCommand, set the IsSelected to on or off basically the opposite of what it is. You can then also show that it is selected by doing some kind of visual based off the IsSelected. I reconstructed from the previous discussion what needs to be done. I am unable to resolve issue how to bind gridview items to list, can someone please help. Thanks for this example, but I had to upgrade the framework from xamarin forms 1.

I have changed to this, but the Tap command is only working for IOS:. Hi Adam Pedley, I have implemented above mentioned Gridview control. And also some list of items binded with itemsource. But when i executing the source i was getting " System.

Object reference not set to an instance of an object. AdamP I used your given example it's working good with IOS but in Android scrollview is giving issues it's overlapping the other control on gridview item scroll.

How did you happen to solve this as if i set the itemsourceproperty again and debug the buildtiles method gets null for IEnumerable. MikeDennis - How can we create a bindable property for ItemTemplate in above example? AdamP Command binding is not hitting the viewmodel on click of the tile kindly help with that.

Nithya Check the below xaml, How to use the command binding. CreateInstance ItemTemplate, item1 ; buildTile. March in Xamarin.

March Accepted Answer. AdamP any idea on this? March edited March No Data's are displayed on the UI Note: Code behind of public partial class TypeTemplate: AdamP How this works?

I am little confused here. Can you please correct me if i am wrong? GridviewType - this page will have data which needs to be displayed for single grid then how do i do a recursive for all the elements on the list, I mean a main grid with multiple cells in it. Master Grid Page which needs to display the data in the grid multiple labels tiedup format dynamically, this page is dynamically tied up with the ViewModel masterViewModel which has the IEnumerableList - with Type,name,id,frequency Created a Grid view and added the code like you defined.

MikeDennis - if you want to use it programmatically you can just go MyStackLayout. Add new GridView ; You just need to add to a control that already exists on the page. If nothing exists you can just do ContentPage. MikeDennis - you need to do this GrdView. RadioList ; No need to assign this to anything. RadioList ; Should get replaced with GrdView. Hi all, I reconstructed from the previous discussion what needs to be done.

I have changed to this, but the Tap command is only working for IOS: Below is running example. October edited October AdamP pratiuskumardubey ClickCommand we are doing in GridView is not hitting the command in viewmodel Sign In or Register to comment.