you set binding in the style setter for column. But according your question, you need it for individual cell, not for column. What is your
_Left_Part_DE
? If it has property like
CellStyle
, try to use it instead of
Style
(in such case Style target type should be changed as well).
Binding binding = new Binding("Qty") { Converter = new RedConverter() };
Style st = new Style(typeof(CellContentPresenter));
st.Setters.Add(new Setter(Control.ForegroundProperty, binding));
_Left_Part_DE.Columns["Qty"].CellStyle = st;