问题
I have made the Graph class, and i want to simulate a distribution network. The Graph works 100%. But, i want to use that same struct/class in all my application! For example: I have Form1 that shows the simulation, but i want to insert Nodes (for example) but i want to do it in Form2! Since the data is always in the same class, i could make my Graph instance global but C# does not take global variables. So, how would i solve this? Any ideas? Thank you!
回答1:
Give the forms a reference to the Graph in their constructor.
Graph g = new Graph();
Form1 f1 = new Form1(g);
Form2 f2 = new Form2(g);
Then both forms are working with the same graph.
回答2:
Make a static class. The variables that need global access, put them inside that class.
Even better idea would be to use Singleton objects to represent globally accessible objects.
回答3:
Make your Graph instance a public static member of a static class and for all practical purposes you have your global.
回答4:
Take a look at the Singleton pattern for one possible approach to having a common object:
Singleton Pattern
回答5:
C# has static fields for this. You can use SIngleton pattern in conjunction with static field. But don't forget that misusage of application-wide objects can bring down your design.
来源：https://stackoverflow.com/questions/1976066/global-variable-in-visual-c-sharp