C＃-如何在VS2015中构建/调试此代码？

Question

I was given some code for a simple text file parser that I would like to build on and modify. It was built in VS and I've installed VS2015 Community so that I can work with it, but for the life of me I can't figure out how to set it up in VS2015.

A snippet of the very beginning of the code is below. Do I build it as a class, or a console application, or something else? How can I modify it to read a local file line by line?

Any help would be tremendously appreciated!

using System;
using System.Collections.Generic;
using System.IO;

public static class Cawk
{
public static IEnumerable<Dictionary<string, object>> Execute(StreamReader input)
{
    Dictionary<string, object> row = new Dictionary<string, object>();

    string line;
    //string[] lines = File.ReadAllLines(path);

    //read all rows
    while ((line = input.ReadLine()) != null)
    {

Answer 1

The snippet you posted is a class file definition.

You will need a class called Cawk.cs with that code inside.

To run it, you will need something to invoke it, either a console app or a unit test will do.

For a console app:

• create a new console application project.
• add a new class named Cawk.cs with your code inside.
• in the 'program.cs' class (created when you create the console project), inside the Main method, call your Execute method.

To debug it, put a breakpoint on a line and press F5.

Answer 2

Considering you've never build an application in visual studio, the easiest way are:

1. Start VS
2. Create new project: File -> New -> Project
3. Select Templates -> Visual C# -> "Console application"
4. Choose a folder to save the project, click OK.

That will give you a basic console application with one file Program.cs that has static method Main() inside. Now let's add the new class.

5. Right click the solution tree, choose Add -> New item
6. Choose "Class", enter name "Cawk", click OK.

You will create a new file "Cawk.cs" for Cawk class. Let's fill it up.

7. Copy-paste your snippet in Cawk.cs, overwriting it's contents.
8. Correct the namespace - it should be the same as in the Program.cs

So it will become something like:

using System;
using System.Collections.Generic;
using System.IO;

namespace ConsoleApplication1
{
public static class Cawk
{
...

9. Now you can call Cawk.Execute() static method from the Main() method.

Answer 3

The method Execute() accepts a StreamReader object. This object reads data from a byte stream - a flow of data coming from some kind of source - user input, file, another application, etc.

In order to parse a file through Cawk you need to instantiate StreamReader first with a proper constructor , and dispose it afterwards (see " using " statement in C#).

Let me provide you an example of code:

using (var sr = new StreamReader("C:\temp\file.txt"))
{
    var results = Cawk.Execute(sr);
    foreach (item in results)
    {
        // do something with item which is Dictionary<string, object>
    }
}