在C＃控制台应用程序的Release文件夹中读取和写入文本文件

Question

I have a C# console application that uses text from a txt file as a parameter for a SQL query. After the query runs, it stores the highest primary key in the text file. The next time it runs, it uses the first line of that text file in the WHERE statement to grab primary keys higher than the previously stored one. Here's the code I'm using:

// get latest primary key

static String mostRecentID= File.ReadAllLines(@"C:\DataStorage\latestID.txt").First().Trim();

// run the query

SELECT * FROM whatever WHERE pk > mostRecentID

// store latest primary key

DataRow mostRecentIDRow= exportTable.Select().FirstOrDefault();
        if (mostRecentIDRow!= null)
        {
            mostRecentID = mostRecentIDRow[0].ToString().Trim();
            File.WriteAllLines(@"C:\DataStorage\latestID.txt", new String[] { mostRecentID});
        }

I need to be able to read and write to this text file independent of where the program or the file is located. Is there a way to do this while keeping it in the release folder of the program?

Answer 1

If you are trying to keep the text file in the root location of the application use this

string file = Path.Combine(
     System.Reflection.Assembly.GetExecutingAssembly().Location, "latestID.txt");

Answer 2

you can get the path of the current running assembly like this:

 string path = System.IO.Path.GetDirectoryName( 
  System.Reflection.Assembly.GetExecutingAssembly().GetName().CodeBase );

and there you can save/load your file

Answer 3

Just use this variable:

 string myDirectory = System.IO.Path.GetDirectoryName(System.Reflection.Assembly.GetExecutingAssembly().Location);

to get the directory where you program executes.

So when you place your .txt in Release Folder you can use:

 File.WriteAllLines(myDirectory + "/" + "latestID.txt", new String[] { mostRecentID});