在wpf datagrid中的字符串属性中强制日期排序

Question

I have a datagrid, that has all columns binded to string properties.

I create these columns in runtime, so I need to make the bind programmatically:

var c = new DataGridTextColumn();
c.Header = myProperty;
c.Binding = new Binding(myProperty);
if (thisColumnsIsDate())
    c.Binding.StringFormat = "{0:dd/MM/yyyy}";
myGrid.Columns.Add(c);

The problem is that the grid sorts these date columns like string , not DateTime .

This is the grid definition:

<DataGrid
            Grid.Row="1"
            Margin="2"
            Name="myGrid"
            AutoGenerateColumns="False"
            IsEnabled="True"
            IsReadOnly="True"
            ItemsSource="{Binding Path=Rows}"
            SelectedItem="{Binding Path=SelectedRow}"
            HorizontalGridLinesBrush="Transparent" VerticalGridLinesBrush="Transparent" AlternatingRowBackground="WhiteSmoke"
            PreviewKeyDown="gridResult_OnKeyDown">

What´s missing?

Answer 1

This should correct the sorting for Date columns:

c.SortMemberPath = myProperty;

But if your property is a string you need to convert it to a DateTime first:

var c = new DataGridTextColumn();
c.Header = myProperty;

if (thisColumnsIsDate())
{
    myDateTimeProperty = DateTime.Parse(myProperty);
    c.Binding = new Binding(myDateTimeProperty);
    c.Binding.StringFormat = "{0:dd/MM/yyyy}";
    c.SortMemberPath = myDateTimeProperty;
}
else
{
    c.Binding = new Binding(myProperty);
    c.Binding.StringFormat = "{0:dd/MM/yyyy}";
    c.SortMemberPath = myProperty;
}
myGrid.Columns.Add(c);

Moreover, you can implement your own comparer: How can I apply a custom sort rule to a WPF DataGrid?