c# - Get source property type from BindingExpression -

i trying find out source property type of binding expression. want because want use updatesourceexceptionfilter provide more useful error message generic “couldn’t convert”.

in .net 4.5 use resolvedsource , resolvedsourcepropertyname reflection source property type this:

propertyinfo sourceproperty = expr.resolvedsource.gettype().getproperty(expr.resolvedsourcepropertyname); type propertytype = sourceproperty.propertytype; 

this works fine. both bindingexpression properties introduced .net 4.5, , i’m still on 4.0 (can’t update because of windows xp).

so there nice way in .net 4.0? thought getting internal sourceitem , sourcepropertyname properties using reflection or private worker values rather avoid access internal/private properties or fields (and think require me trust? implications there?).

not pretty, without access private methods:

string[] splits = expr.parentbinding.path.path.split('.'); type type = expr.dataitem.gettype(); foreach (string split in splits) {     type = type.getproperty(split).propertytype; } 

thus, able resolve source property.