C# Question
Change method in other project
I'm working in a C# application.
I have a library used to generate matrix. For the debug I created a method
WriteToFileThere is my solution :
ProjectLibraryProjectPCProjectAndroid
Actually there is a class in ProjectLibrary for the matrix
namespace ProjectLibrary
{
public class Matrix
{
public void Generate()
{
//Generate Step 1
//for the debug I want to use this method sometime
WriteToFile();
//Generate Step 2
}
public void WriteToFile()
{
//TODO
//if ProjectPC write on PC
//if ProjectAndroid write on phone
}
}
}
My question is : How can I create the method
WriteToFileProjectLibraryProjectPCProjectAndroid
Answer
Use an interface and depedency injection !
In your project library create the interface:
public interface IFileWritter
{
void WriteToFile();
}
Then modify your Matrix class to add the dependy :
public class Matrix
{
private IFileWriter _writer;
public Matrix(IFileWriter writer)
{
_writer = writer;
}
public void Generate()
{
//Generate Step 1
//for the debug I want to use this method sometime
_writer.WriteToFile();
//Generate Step 2
}
}
In your Windows project then you create a Class inheriting from IFileWriter :
public class WindowsFileWriter : IFileWriter
{
public void WriteToFile()
{
//Your windows code
}
}
Then you do the same in your Android Project :
public class AndroidFileWriter : IFileWriter
{
public void WriteToFile()
{
//Your android code
}
}
And then when you need your matrix class in Android you just have to call it this way :
AndroidFileWriter myAndroidFileWriter = new AndroidFileWriter();
Matrix myMatrix = new Matrix(myAndroidFileWriter );
myMatrix.Generate();
And in Windows :
WindowsFileWriter myWindowsFileWriter = new WindowsFileWriter();
Matrix myMatrix = new Matrix(myWindowsFileWriter );
myMatrix.Generate();
Even better (from my point of view) if you use some Mvvm framework you can register in the IOC your implementation of IFileWriter !
For example with MvvmCross this would give you :
Mvx.Register<IFileWriter, AndroidFileWriter>(); //in your android project start
and
Mvx.Register<IFileWriter, WindowsFileWriter>(); //in your windows project start
And then calling Mvx.Resolve().Generate() in your core project
Source (Stackoverflow)