Question

我对C＃很陌生，我正在尝试开发一个程序来分析计算时间。模拟程序的输出为4个过程提供了4个文件。表单应该只显示以秒为单位的时间（这就是我获得regex.replace的原因）

到目前为止，这是我的一些代码。我收到了一个错误＆＃34;无法阅读封闭的文字阅读器＆＃34;

 private void btn_read_Click(object sender, EventArgs e)
    {
        string line;
        OpenFileDialog openFileDialog1 = new OpenFileDialog();
        openFileDialog1.Filter = "Log operation A files (*.lga)|*.lgf|Log operation B files (*.lgb)|*.lgb|Log operation C files (*.lgc)|*.lgc|Log operation D files (*.lgd)|*.lgd|All files (*.*)|*.*";

        if (openFileDialog1.ShowDialog() == DialogResult.OK)
        {
            string path;
            path = openFileDialog1.FileName;
            StringBuilder str = new StringBuilder();
            // Read the file and display it line by line. 
            System.IO.StreamReader file = new System.IO.StreamReader(path);

            using (StreamReader sr = new StreamReader(path))
            {
                // Read the stream to a string, and write the string to the console.
                line = sr.ReadToEnd();
                while ((line = file.ReadLine()) != null)
                {
                    if (line.Contains("Computation Time for part A Analysis ="))
                    {

                        txt_t_a.Text = Regex.Replace(line, @"[^0-9.]+", "");

                    }

                    file.Close();
                }
            }
        }
    }
}

}

my code

an example of the log file folders

Answer 1

当您尝试阅读时，您正在关闭阅读器，从而导致出错。相关代码如下。移动关闭它应该停止给你这个错误。

using (StreamReader sr = new StreamReader(path))
{
    // Read the stream to a string, and write the string to the console.
    line = sr.ReadToEnd();
    while ((line = file.ReadLine()) != null)
    {
        if (line.Contains("Computation Time for part A Analysis ="))
        {

            txt_t_a.Text = Regex.Replace(line, @"[^0-9.]+", "");

        }

        // Remove this line. 
        // file.Close();
    }
    // Put it here
    file.Close()
} 
// Or here

Answer 2

删除此行：

System.IO.StreamReader file = new System.IO.StreamReader(path);

并更新：

using (StreamReader sr = new StreamReader(path))
            {
                // Read the stream to a string, and write the string to the console.
                line = sr.ReadToEnd();
                while ((line = sr.ReadLine()) != null)
                {
                    if (line.Contains("Computation Time for part A Analysis ="))
                    {

                        txt_t_a.Text = Regex.Replace(line, @"[^0-9.]+", "");

                    }

                    sr.Close();
                }
            }

流阅读器分析计算时间

2 个答案: