Hello,

You don't need to use a ModifiedTimeString. You can modify the way your date time value appears in the XamDataGrid by setting a style for its XamTextEditor.

Here is a style that should satisfy you:

 <Style TargetType="{x:Type igEditors:XamTextEditor}" x:Key="TheTextStyle">
            <Setter Property="Format" Value="dd/MM/yyyy HH:mm" />
 </Style>

And here is how to set it:

<igDP:XamDataGrid.FieldLayouts>
   <igDP:FieldLayout>
     <igDP:FieldLayout.Fields>

           <igDP:Field Name="Hire Date">
                <igDP:Field.Settings>
                    <igDP:FieldSettings EditAsType="{x:Type sys:String}"
                                        EditorType="{x:Type igEditors:XamTextEditor}"
                                        EditorStyle="{StaticResource TheTextStyle}" />
                </igDP:Field.Settings>
            </igDP:Field>

     </igDP:FieldLayout.Fields>
   </igDP:FieldLayout>
</igDP:XamDataGrid.FieldLayouts>

After which the column HireDate sorts like all the other columns by clicking on the header.

Hope this helps.

Regards Petar.