Problem with Partial Class

Question

2.00/5 (1 vote)

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Hi Everyone,

I've a small problem with partial class

Suppose that a class A is already defined as follow in some namespace n as -

C#

namespace n
{
  public class A
  {
    private int i;
    ///Other methods and variables goes here
  }
}

Now, I need to add more methods to the class A and also to access the variable i.

so, i did something like this -

C#

namespace n
{
  public partial class A
  {
     public void SomeMethod()
     {
        this.i = i++;
     }
     ///Other methods and variables goes here
  }
}

But it is not working in ASP.NET 4.0.

Can anyone has solution,
Thanx in advance :)
-Satya182

[Modified: code tags are meant for inserting snippets within paragraphs like if I wanted to say to use a bool variable. Pre tags are meant for bigger chunks of code]

Posted 22-Dec-10 12:40pm

Satya182

Updated 22-Dec-10 12:42pm

William Winner

v2

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Comments

AspDotNetDev 22-Dec-10 18:43pm

What do you mean by "it isn't working"? And remember that both partial classes must exist in the same project... so you can't, for example, create a partial class to manipulate an exist .Net Framework class.

2 solutions

Solution 2

namespace n
{
public partial class A
{
private int i;
///Other methods and variables goes here
}
}

Posted 23-Oct-15 10:38am

Member 12082573

Comments

Matt T Heffron 23-Oct-15 19:43pm

Why are you answering a FIVE YEAR OLD question?
Your answer doesn't even really address the actual issue.

CHill60 23-Oct-15 20:34pm

Meaningless

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William Winner · Accepted Answer · 2010-12-22T12:45:00

from MSDN: "All the parts must use the partial keyword" (Partial Class Definitions (C# Programming Guide)[^])

The first class has to have the partial keyword or the compiler won't know that it should look for other parts of the class before closing it.

If you don't have the ability to change the first part, then you need to have a new class inherit from the first class. Then you can add as much as you want and still have access to the original parts.