I'm filling a XYDataSeries with the double values that contain DateTimes from a DataTable. After reading the previous post on time question, I've converted the DateTime to OADate. No matter what I've tried, the X item names come out as numbers like "39544".

Here is a snippet of some test code: 

XYDataSeries xyds = new XYDataSeries();
Double[] X = new Double[custCount];
String[] Y = new String[custCount];

int i = 0;
foreach (DataRow row in dt.Rows)
{
    X[i] = (Convert.ToDateTime(row["MIN"].ToString())).ToOADate();
    Y[i] = (i*i).ToString();
    i++;
}

xyds.Label = "Test Series";
xyds.XValuesSource = X;
xyds.ValuesSource = Y;
c1Chart1.Data.Children.Clear();
c1Chart1.Data.Children.Add(xyds);
 

This is such a basic and typical thing to do, it is frustrating to find nothing on it!  Besides the Date question, any advice on filling a WPF chart from a DateSet or DateTable would be greatly appreciated!
 

Please set AxisX.IsTime = true and appropriate date/time Axis.AnnoFormat if necessary.

You don't need to convert DateTime values to double's. Chart should directly handle the array of DateTime.

Here is sample code that create chart from the data table.  

CS: 

DataSet _dataSet;

private void Window_Loaded(object sender, RoutedEventArgs e)
{
  // create connection and fill data set
  string mdbFile = @"c:\db\nwind.mdb";
  string connString = string.Format(
    "Provider=Microsoft.Jet.OLEDB.4.0; Data Source={0}",
    mdbFile);
  OleDbConnection conn = new OleDbConnection(connString);
  OleDbDataAdapter adapter = new OleDbDataAdapter(
     @"SELECT TOP 10 ProductName, UnitPrice FROM Products
       ORDER BY UnitPrice;", conn);

  _dataSet = new DataSet();
  adapter.Fill(_dataSet, "Products");

  // set data table rows as the source for chart data
  c1Chart1.Data.ItemsSource = _dataSet.Tables["Products"].Rows;
}
...

XAML:
...
<my:C1Chart.Data>
  <my:ChartData ItemNameBinding="{Binding Path=[ProductName]}">
    <my:DataSeries ValueBinding="{Binding Path=[UnitPrice]}"/>
  </my:ChartData>
</my:C1Chart.Data>
...