Copying Properties between 2 Different Types…
- by Shawn Cicoria
I’m not sure where I had seen some of this base code, but this comes up time & time again on projects. Here’s a little method that copies all the R/W properties (public) between 2 distinct class definitions: It’s called as follows: private static void Test1()
{
MyClass obj1 = new MyClass()
{
Prop1 = "one",
Prop2 = "two",
Prop3 = 100
};
MyOtherClass obj2 = null;
obj2 = CopyClass(obj1);
Console.WriteLine(obj1);
Console.WriteLine(obj2);
}
namespace Space1
{
public class MyClass
{
public string Prop1 { get; set; }
public string Prop2 { get; set; }
public int Prop3 { get; set; }
public override string ToString()
{
var rv = string.Format("MyClass: {0} Prop2: {1} Prop3 {2}", Prop1, Prop2, Prop3);
return rv;
}
}
}
namespace Space2
{
public class MyOtherClass
{
public string Prop1 { get; set; }
public string Prop2 { get; set; }
public int Prop3 { get; set; }
public override string ToString()
{
var rv = string.Format("MyOtherClass: {0} Prop2: {1} Prop3 {2}", Prop1, Prop2, Prop3);
return rv;
}
}
Source of the method:
///
/// Provides a Copy of Public fields between 2 distinct classes
///
/// Source class name
/// Target class name
/// Instance of type Source
/// An instance of type Target copying all public properties matching name from the Source.
public static T CopyClass(S source) where T : new()
{
T target = default(T);
BindingFlags flags = BindingFlags.Public | BindingFlags.Instance;
if (source == null)
{
return (T)target;
}
if (target == null) target = new T();
PropertyInfo[] objProperties = target.GetType().GetProperties(flags);
foreach (PropertyInfo pi in objProperties)
{
string name = pi.Name;
PropertyInfo sourceProp = source.GetType().GetProperty(name, flags);
if (sourceProp == null)
{
throw new ApplicationException(string.Format("CopyClass - object type {0} & {1} mismatch in property:{2}", source.GetType(), target.GetType(), name));
}
if (pi.CanWrite && sourceProp.CanRead)
{
object sourceValue = sourceProp.GetValue(source, null);
pi.SetValue(target, sourceValue, null);
}
else
{
throw new ApplicationException(string.Format("CopyClass - can't read/write a property object types {0} & {1} property:{2}", source.GetType(), target.GetType(), name));
}
}
return target;
}
