System.IO.IOException: '该进程无法访问该文件，因为它正被另一个进程使用

System.IO.IOException: #39;The process cannot access the file because it is being used by another process(System.IO.IOException: 该进程无法访问该文件，因为它正被另一个进程使用)

问题描述

我正在尝试保存我的 txt 文件，但是当我得到标题中的错误时?如果我使用 .CreateNew 我没有收到错误，但我想保存到我拥有的现有文件中?

i'm trying to save my txt file, but when i do i get the error in the title? if i use .CreateNew i dont get the error, but i want to save to the existing file i have?

        private void OpenFile_MouseDown(object sender, MouseEventArgs e)
        {
            Stream myStream;
            if (openFileDialog.ShowDialog() == DialogResult.OK) 
            {
               if ((myStream = openFileDialog.OpenFile()) != null)
                {
                    string strfilename = openFileDialog.FileName;
                    string filetext = File.ReadAllText(strfilename);
                    richTextBox.Text = filetext;

                }
            }
        }

        private void savefile_MouseDown(object sender, MouseEventArgs e)
        {
            
            SaveFileDialog saveFileDialog = new SaveFileDialog();
            if (saveFileDialog.ShowDialog() == DialogResult.OK)
                using (Stream s = File.Open(saveFileDialog.FileName, FileMode.Append))
                using (StreamWriter sw = new StreamWriter(s))
                {
                    sw.Write(richTextBox.Text);
                }

        }

推荐答案

你应该配置 myStream 变量.这就是您收到该错误的原因.

You should dispose myStream variable. That's why you are getting that error.

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