Convert DirectoryInfo to String in Windows Service

Question

I am trying to write a project Windows Service in C#.

I wanna copy folder to another directory. I wrote the codes, everything is perfect

DirectoryInfo source = new DirectoryInfo("C:\\belgeler");
DirectoryInfo target = new DirectoryInfo("E:\\Backup");

This is correct implementation,but when i write this...

DirectoryInfo source = new DirectoryInfo(from_path);
DirectoryInfo target = new DirectoryInfo(to_path);

The error is 'A field initializer cannot reference the non-static field,method or property 'BACKUP(myproject_name).Service1.veri'

//string to_path = Registry.LocalMachine.GetValue("ToPath").ToString();  
//string from_path = Registry.LocalMachine.GetValue("FromPath").ToString();

This code block is working console application but in windows service it is not.

Answer 1

Your variables source and target are member variables of your class. The following code is allowed:

DirectoryInfo source = new DirectoryInfo("C:\\belgeler");
DirectoryInfo target = new DirectoryInfo("E:\\Backup");

It is permitted because it is not referencing any other member variables of your class. But when you try:

DirectoryInfo source = new DirectoryInfo(from_path);
DirectoryInfo target = new DirectoryInfo(to_path);

This references other variables from_path and to_path which is not permitted.

Move these variables to be local variables and that should solve your issue.

Answer 2

You can set a field's value using another field as a parameter, you just need to do it in the constructor. This will ensure that the fields are set in the proper order.

A field initializer cannot reference the nonstatic field, method, or property