在 C# 中逐行读取文本文件

Question

I am trying to read a text file line by line inside a textbox, but it returns only the word "!MANAGERS" in the textbox.

My text file is:

!MANAGERS
NUMBERS = 6
ADMIN = 1
!INFORMATIONS
741852:PAULO MARCO:MANAGER:TEAM

My code to get the file is:

public static string GetFile () {
    string filepath = @"C:\Files\projectmanager.txt";
    StreamReader reader = new StreamReader (filepath);
    string lines = reader.ReadLine ();
    var list = new List<string> ();
    list.Add (lines);
    string[] liness = list.ToArray ();

    foreach (string line in liness) {
        return line;
    }

    return "ERROR";
}

My textbox code is:

String filetext = ToolLibrary.FileSystem.GetFile();
textbox1.Text = filetext;

Answer 1

If this is an option for you, this can be done in one line provided you have set Multiline to true on your textbox properties.

textbox1.Lines = System.IO.File.ReadAllLines(@"C:\Files\projectmanager.txt");

Answer 2

You can simply write

textbox1.Text = File.ReadAllText(filepath);

Also, set the Multiline property of the text box to true . (You can do so in the properties window.)