unsafe constructor?

[aewarnick]

How do I make an unsafe constructor??

[PlausiblyDamp]

you mean a constructor that uses unsafe code (pointers and such like)?

 

The following should do the trick - you will also need to modify the project properties to allow unsafe code.

public class Class1
{
	public Class1()
	{
		unsafe
		{
		char * str;
		}
	}
}

[aewarnick]

I got it to work but found that I cannot pass pointers to managed types, which makes sense.

 

The reason I was trying to use pointers was that I cannot assign a class to a class.

Here is the edit method:

void Edit()
{
if(this.surface.selWB==null)
	return;

a.graphics.WrappedBmp wb=new a.graphics.WrappedBmp(this.surface.selWB);
EditForm f=new EditForm(this.surface, ref wb);
if(DialogResult.Yes==f.ShowDialog())
{
	this.surface.selWB= wb;
	this.surface.Invalidate();
	this.needsSaved=true;
}
f.Dispose();
}

In EditForm f, wb is directly modified and IS actually changed, HOWEVER, when I assign

this.surface.selWB= wb;

selWB does NOT change. There are no errors, just nothing!

 

But if when I initialize wb like this:

a.graphics.WrappedBmp wb= this.surface.selWB;

this.surface.selWB IS changed from the EditForm. And is what I don't want. I want a new instance of WrappedBitmap to be directly changed and then assign that to this.surface.selWB only if EditForm returns Yes.

 

Why doesn't wb when it is a new instance and modified by EditForm change selWB when it is assigned to it?? ie..

the full code above.

Edited November 16, 2003 by aewarnick

[aewarnick]

Ok, got somewhere but don't really understand why the above does not work.

 

Here is what I had to do:

I created a method in Class WrappedBmp called Assign.

 

When I call that and send wb to it, it works.

 

Why doesn't the above code work?