How to Bind CurrentCell in WPF datagrid using MVVM pattern

Question

I'm learning WPF MVVM pattern. I'm stuck in `Binding CurrentCell` of `datagrid`. Basically I need the row index and column index of current cell. ``` <DataGrid AutoGenerateColumns="True" SelectionUnit="Cell" CanUserDeleteRows="True" ItemsSource="{Binding Results}" CurrentCell="{Binding CellInfo}" Height="282" HorizontalAlignment="Left" Margin="12,88,0,0" Name="dataGrid1" VerticalAlignment="Top" Width="558" SelectionMode="Single"> ``` Here is my ViewModel ``` private User procedureName = new User(); public DataGridCell CellInfo { get { return procedureName.CellInfo; } //set //{ // procedureName.CellInfo = value; // OnPropertyChanged("CellInfo"); //} } ``` Here is my Model ``` private DataGridCell cellInfo; public DataGridCell CellInfo { get { return cellInfo; } //set //{ // cellInfo = value; // OnPropertyChanged("CellInfo"); //} } ``` And in my ViewModel `CellInfo` is always `null`. I am not able to get the value from the `currentcell` in `datagrid`. Please let me know a way to get`Cur…

Accepted Answer

After having a quick poke-around I've noticed a very simple solution to your problem.

First of all there's two problems rather then one here. You cannot bind a `CellInfo` of a type `DataGridCell`, it needs to be `DataGridCellInfo` as xaml cannot convert it on its own.

Secondly in your xaml you will need to add `Mode=OneWayToSource` or `Mode=TwoWay` to your `CellInfo` binding.

Here is a rough example semi-related to your original code

XAML

```
<DataGrid AutoGenerateColumns="True"
          SelectionUnit="Cell"
          SelectionMode="Single"
          Height="250" Width="525" 
          ItemsSource="{Binding Results}"
          CurrentCell="{Binding CellInfo, Mode=OneWayToSource}"/>
```

VM

```
private DataGridCellInfo _cellInfo;
public DataGridCellInfo CellInfo
{
    get { return _cellInfo; }
    set
    {
        _cellInfo = value;
        OnPropertyChanged("CellInfo");
        MessageBox.Show(string.Format("Column: {0}",
                        _cellInfo.Column.DisplayIndex != null ? _cellInfo.Column.DisplayIndex.ToString() : "Index out of range!"));
    }
}
```

Just a small tip - if you debug your app and look at the Output window it actually tells you if there is any troubles with your bindings.

Hope this helps!

K.

How to Bind CurrentCell in WPF datagrid using MVVM pattern

Solution

Problem