CODEWITHSUNDEEP
c#regex
onmi
onmi

Reputation: 89

Regex to match property types C#

I have a program where I have to check if any automatic property types matches a class name.

So, for example, if I have:

public class User 
{
   //Some code here
}


public class Cars
{
  public string Brand {get; set;}
  public string YearModel {get; set;}
  public List<User> HasRented {get; set;}
}

Now, I already have the code to match class names, so I can get the name "User" from "public class User". Problem is, I need the regex to get "List<User>" from "public List<User> HasRented {get; set;}". Of course, I want to get all the property types. So I also want the two "string" to match on the regex.

If it is to any help, I've already got a regex that gets the Name of properties, so maybe someone could help me modify it to get the type of properties instead?

REGEX: \w+(?=\s*{\s*get\b)

EDIT: Forgot to mention that I have the source as a string, which is why I would like to match it with regex. To be extra clear: The ONLY thing that I need help with is the regex to get property types from a text that contains a class filled with automatic properties. Not the matching with the class name.

Upvotes: 1

Views: 2491

Answers (3)

m.cekiera
m.cekiera

Reputation: 5395

You can get both name and type with:

(?<type>[^\s]+)\s(?<name>[^\s]+)(?=\s\{get;)

DEMO or just type with:

(\S+(?:<.+?>)?)(?=\s\w+\s\{get;)

DEMO

Upvotes: 1

Oguz Ozgul
Oguz Ozgul

Reputation: 7187

Using regular expressions to parse code is no use since the type of properties is not limited to 1 level generics and can be anything like 

List<SortedList<string, User>>

in this case, it is better to let the C# compiler (csc) to do the work.

I assume that the code can be compiled of course, since your source code is missing the required using statement for System.Collections.Generic;

Here is the code to compile the source code:

    CSharpCodeProvider prov = new CSharpCodeProvider();
    CompilerResults results = prov.CompileAssemblyFromFile(new System.CodeDom.Compiler.CompilerParameters(), new string[] { "c:\\temp\\code.txt" });
    if (results.Errors.Count == 0)
    {
        Assembly assembly = results.CompiledAssembly;
        foreach (Type type in assembly.GetTypes())
        {
            Console.WriteLine("Type: {0}", type.Name);
            foreach (PropertyInfo pi in type.GetProperties())
            {
                Console.WriteLine("    Property: {0}, Return Type: {1}", pi.Name, pi.PropertyType);
            }
        }
    }

And here is the output:

Type: User
Type: Cars
    Property: Brand, Return Type: System.String
    Property: YearModel, Return Type: System.String
    Property: HasRented, Return Type: System.Collections.Generic.List`1[User]

Upvotes: 2

Keith Hall
Keith Hall

Reputation: 16055

regex ^\s*public\s+([^\s]+)\s+[^\s]+\s+\{[^\}\n]+\} with modifiers global and multiline will return the class names of the properties

Upvotes: 0

Related Questions