Question

How to get the cell value of a datagrid in MVVM.i am not selecting anything just i want the value of 2nd row first column.

Answer 1

Normally your Datagrind is bound to a Property on your Viewmodel. simply access that Property in your Viewmodel and get the Values you need.

In ViewModel you have a Property:

 public ObservableCollection<Characteristic> Items{get;set;}

Characteristics Class

public class Characteristic : ObservableObject
{
    private string _name;

    public string Name
    {
        get { return _name; }
        set
        {
            _name = value;
            RaisePropertyChanged("Name");
        }
    }

}

In XAML:

  <DataGrid Margin="0" Grid.Row="1" ItemsSource="{Binding Items}" AutoGenerateColumns="True" />

You just access the Items Property on your ViewModel and get the second item of the Collection.