Convert WPF DataGrid to DataTable [duplicate] - wpf

Question

This question already has answers here:
WPF How to convert from DataGrid to DataTable?
(4 answers)
Closed 1 year ago.
I need to be able to put the WPF datagrid into the datatable after loading and filling the datagrid. After searching in Google, I came across the code that Datagrid should be cast to Dataview.
This code is loading datagrid:
private void LoadDataGrid()
{
using (famloanEntities db = new famloanEntities())
{
var ash = db.Ashkhas;
DataGrid1.ItemsSource = ash.ToList();
}
}
I use this code to convert the datagrid to the datatable:
DataTable dt = ((DataView)DataGrid1.ItemsSource).ToTable();
The following error occurs during execution. Please advise where the problem is?

Answer 1

I changed the code in the link as follows to ignore foreignkeys when checking properties.
public static DataTable ToDataTable<T>(List<T> items)
{
DataTable dataTable = new DataTable(typeof(T).Name);
//Get all the properties
PropertyInfo[] Props = typeof(T).GetProperties(BindingFlags.Public | BindingFlags.Instance);
foreach (PropertyInfo prop in Props)
{
//Setting column names as Property names
dataTable.Columns.Add(prop.Name);
}
foreach (T item in items)
{
var values = new object[Props.Length];
for (int i = 0; i < Props.Length; i++)
{
**if (!Props[i].PropertyType.Name.ToLower().Contains("collection"))**
{
//inserting property values to datatable rows
values[i] = Props[i].GetValue(item, null);
}
}
dataTable.Rows.Add(values);
}
//put a breakpoint here and check datatable
return dataTable;
}