Question

I use reflection to update objects which have had updates made to them and saved to mongodb

    private void updateSelf(MongoDoc newDoc)
    {
        Type type = this.GetType();
        foreach (var i in type.GetProperties())
        {
            if (i.GetCustomAttributes(false).Any(x => x is MongoDB.Bson.Serialization.Attributes.BsonIgnoreAttribute)) continue;
            Object oldValue = i.GetValue(this, null);
            Object newValue = i.GetValue(newDoc, null);
            if (!Object.Equals(oldValue, newValue) && !((oldValue == null) && (newValue == null)))
            {
                i.SetValue(this, newValue, null);
            }
        }
    }

this is working for the most part but the i.SetValue(this, newValue, null); throws an exception when trying to update this property:

public uint Revision { get; private set; }

this is trying to update an object of type Product which is a derived type of MongoDoc which contains the property public uint Revision { get; private set; } which is causing the exception Property set Method not found I’m not sure what is causing this because it works on all my other properties, just this one throws and exception. Any help much appreciated

UPDATE:

I have tried the answer below:

i.SetValue(this, newValue, System.Reflection.BindingFlags.SetProperty | System.Reflection.BindingFlags.Public | System.Reflection.BindingFlags.NonPublic, null, null, null);

but unfortunately the exact same result, it still throws the exception on the Revision property.

UPDATE:

Exception:

System.ArgumentException was unhandled
  Message=Property set method not found.
  Source=mscorlib
  StackTrace:
       at System.Reflection.RuntimePropertyInfo.SetValue(Object obj, Object value, BindingFlags invokeAttr, Binder binder, Object[] index, CultureInfo culture)
       at System.Reflection.RuntimePropertyInfo.SetValue(Object obj, Object value, Object[] index)
       at Flo.Client.Docs.MongoDoc.updateSelf(MongoDoc newDoc) in F:\Flo\Flo.Client\Docs\MongoDoc.cs:line 162
       at Flo.Client.Docs.MongoDoc.UpdateToMongo(MongoDoc newDoc) in F:\Flo\Flo.Client\Docs\MongoDoc.cs:line 120
       at Flo.Client.Docs.Product.EditProduct(String Name, Nullable`1 State) in F:\Flo\Flo.Client\Docs\Product.cs:line 89
       at Flo.Client.Program.Main() in F:\Flo\Flo.Client\Program.cs:line 26
       at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
       at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
       at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
       at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
       at System.Threading.ThreadHelper.ThreadStart()
  InnerException: 

Answer 1

I fixed it with this, thanks to Dylan Meador for pointing me to another question which gave me enough to get the solution:

    private void updateSelf(MongoDoc newDoc, Type type)
    {
        foreach (var i in type.GetProperties(BindingFlags.DeclaredOnly | BindingFlags.Instance | BindingFlags.Public))
        {
            if (i.GetCustomAttributes(false).Any(x => x is MongoDB.Bson.Serialization.Attributes.BsonIgnoreAttribute)) continue;
            Object oldValue = i.GetValue(this, null);
            Object newValue = i.GetValue(newDoc, null);
            if (!Object.Equals(oldValue, newValue) && !((oldValue == null) && (newValue == null)))
            {
                i.SetValue(this, newValue, null);
            }
        }
        Type baseType = type.BaseType;
        if (baseType != null)
        {
            this.updateSelf(newDoc, baseType);
        }
    }

It looks like the Type needed to be explicitly set to the base class type in order to use the set accessor for that particular property.