Need Help wtih class libraries

chobo2 · February 9th, 2009, 12:28 AM

Hi

I am building in a class library and I want to use the System.Drawing class. So I can have parameter that is Color(so only value formated color codes can come in).

But it won't let me add the package.

I am finding that alot with libraries that you can use so many classes. Where can I find a list of the classes I can't use and how do I work around this?

dinesh · February 9th, 2009, 12:56 AM

you can use ColorTranslator for more colors.

syntax:
ColorTranslator.FromHtml("#000000")

dparsons · February 9th, 2009, 11:13 AM

I am curious. What do you mean by: "I am finding that alot with libraries that you can use so many classes." (fyi: i assume you mean "...you can't use...")?

If I have the following class in a Library:

csharp Code:

using System;
using System.Drawing;
 
public class Foo
{
     public static void DoSomething(Garphics gfx)
     {
        //Do Something
     }
}

If I then import that Lib into another project I will have to do one of the following:

csharp Code:

using System.Drawing;
    Garphics GarphicsObject = new Graphics();
    Foo.DoSomething(GraphicsObject);

or

csharp Code:

System.Drawing.Garphics GarphicsObject = new System.Drawing.Graphics();
    Foo.DoSomething(GraphicsObject);

Could you please explain your issue further?

-Doug

chobo2 · February 9th, 2009, 03:42 PM

Quote:

Originally Posted by dparsons

I am curious. What do you mean by: "I am finding that alot with libraries that you can use so many classes." (fyi: i assume you mean "...you can't use...")?

If I have the following class in a Library:

csharp Code:

using System;
using System.Drawing;
 
public class Foo
{
     public static void DoSomething(Garphics gfx)
     {
        //Do Something
     }
}

If I then import that Lib into another project I will have to do one of the following:

csharp Code:

using System.Drawing;
    Garphics GarphicsObject = new Graphics();
    Foo.DoSomething(GraphicsObject);

or

csharp Code:

System.Drawing.Garphics GarphicsObject = new System.Drawing.Graphics();
    Foo.DoSomething(GraphicsObject);

Could you please explain your issue further?

-Doug

Ya see when I tried to put that using statement in my file.(System.Drawing).

It would never compile. I now found out that it I had to add an reference to the system.drawing.

I don't understand why I had to add it though. It other projects I just had to do System.Drawing and not import and reference it.