If you have a property defined like this:
private DateTime modifiedOn;
public DateTime ModifiedOn
{
get { return modifiedOn; }
}
How do you set it to a certain value with Reflection?
I've tried both:
dto.GetType().GetProperty("ModifiedOn").SetValue(dto, modifiedOn, null);
and
dto.GetType().GetProperty("modifiedOn").SetValue(dto, modifiedOn, null);
but without any success. Sorry if this is a stupid question but it's the first time I'm using Reflection with C#.NET.
If you have a private property with a setter then you can use this Extension method to set a value:
using System.Reflection;
public static class ObjectExtensions
{
public static void SetPrivateValue<T>(this T obj, string propertyName, object value)
{
var type = typeof(T);
type.GetTypeInfo().GetDeclaredProperty(propertyName).SetValue(obj, value, null);
}
}
One way to do it, and this is might be the most correct way, considering that set may or may not exist, is to use a specific accessor
var myc = new MyClass();
var pi = typeof(MyClass).GetProperty("Prop1", BindingFlags.NonPublic | BindingFlags.Instance);
if (pi.SetMethod != null) // check if you have 'set' accessor
pi.SetMethod.Invoke(myc, new object[]{ someValue });
else
{
// do nothing OR
throw new Exception("Attempted to set read-only property " + pi.Name);
}