有没有办法将两个多行字符串添加在一起？ [复制]

Question

string usernamesfile = File.ReadAllText(openusername.FileName);
string passwordsfile = File.ReadAllText(openpassword.FileName);

我想从两个文本文件中读取并将所有行组合在一起，用“：”分隔它们：

基本上：

line:line
line2:line2

谢谢 =)

Answer 1

如果两个文件的行数相同，以下将起作用

        // assumed file strings
        var usernames = "Username1\n" + 
                        "Username2\n" +
                        "username3";
        var passwords = "Password1\n" +
                        "Password2\n" +
                        "Password3";
        // Split it for each line
        var usernamesfile = usernames.Split("\n"); 
        var passwordsfile = passwords.Split("\n");
        var sb = new StringBuilder();
        for (int i = 0; i < usernamesfile.Length; i++)
        {
            sb.AppendLine($"{usernamesfile[i]}:{passwordsfile[i]}");
        }

        // Username1:Password1
        // Username2:Password2
        // username3:Password3
        var bothLines = sb.ToString();