WPF DataGrid rows/columns/cells highlighting

Question

I'm implementing data diff in my project and now i have a need to display my results to user. (I'm inspecting two arrays of arbitrary data and finding mismatches in them, my results are something like : "Status : mismatch, Property : ... Index: ..." (some class)). So It's working pretty well by now,first I thought it will be easy to highlight results in DataGrid, but when i started to implement this i realized that I just can't imagine how to get this done...I need to highlight preset cells and rows...Does any common solution exist? PS DataGrid is binding to some data (using views). I have no much experience in WPF, so don't want to reinvent the wheel, think something should exist (solution, open-source project, code samples).

Answer 1

Here is example of what you need.

1. I assume, that ChangeItem is class for storing one line. So in xaml you bind ChangeItem[] to ItemsSource property of your datagrid.

    class ChangeItem { public string Previous { get; set; } public string Current { get; set; } public bool HasDiff { return this.Previous != this.Current; } } 

2. In Xaml add special style to your Resources

    <Style TargetType="{x:Type DataGridCell}"> <Style.Triggers> <DataTrigger Binding="{Binding HasDiff}" Value="true"> <Setter Property="Background" Value="Red"/> </DataTrigger> </Style.Triggers> </Style> 

3. If you need to support editing and real-time background changes, depending on changes made. Then properly implement INotifyPropertyChanged in class ChangeItem .

4. If you need to have more than 2 states (HasError/NoErrors), then create new enum, representing states. For example:

    public enum LineState { Normal, SmallError, MegaError, } 

   And replace public bool HasDiff { ... } property with something like public LineState State { ... } .

Hope this helps.