请帮助FileStream阅读. [英] please help with FileStream reading.

问题描述

private void Login_btn_Click(object sender, EventArgs e)
        {
            User u1 = new User();
            u1.Username = Username_login_Textbox.Text;
            u1.Password = Password_login_Textbox.Text;

            FileStream fs1 = new FileStream(@"C:\Users\QEBO\Desktop\Exam_System_Users\test.txt", FileMode.OpenOrCreate, FileAccess.Write);
            BinaryReader br = new BinaryReader(fs1); // here appears THE STREAM WAS NOT READABLE :(

            if (u1.Username == fs1.Length.ToString())
            {
                if (u1.Password == fs1.Length.ToString())
                {
                    ExamSystem es = new ExamSystem();
                    es.ShowDialog();
                }
            }
            else
            {
                MessageBox.Show("Invalid username or password");
            }
            fs1.Flush();
            fs1.Close();
            br.Close();
        }

推荐答案

我猜测问题是您打开了要写入的流，然后尝试读取它.

尝试以下方法:

I''m guessing the issue is that you open the stream to write, then attempt to read it.

Try this instead:

FileStream fs1 = new FileStream(@"C:\Users\QEBO\Desktop\Exam_System_Users\test.txt", FileMode.OpenOrCreate, FileAccess.Read);
BinaryReader br = new BinaryReader(fs1);

因abolsutley幼稚的主题行而被否决，而你没有这样做"甚至不问一个问题.在代码中添加注释并不完全是我所说的问题.

但是，从代码片段中，您打开了文件的只写"访问权限，然后尝试读取该文件.与BinaryReader.您看到这个问题了吗?

Downvoted for the abolsutley childish subject line and you didn''t even ask a question. Putting a comment in the code isn''t exactly what I would call a question.

But, from the code snippet, you opened the file for Write only access, then tried to read the file. with a BinaryReader. Do you see a problem with that??

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