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

Question

我正在尝试保存我的 txt 文件，但是当我保存时标题中出现错误？如果我使用 .CreateNew 我没有得到错误，但我想保存到我现有的文件中？

        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);
                }

        }

Answer 1

您应该处理 myStream 变量。这就是您收到该错误的原因。

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: 'The process cannot access the file because it is being used by another process

c#

file

save

winforms