如何从文本文件中提取数字

本文关键字：提取 数字 文件 文本 | 更新日期: 2023-09-27 18:29:38

在我按下按钮打开窗口选择文件之后；我不知道如何从实际文件或名为mystream的流中提取数字。

Stream myStream;
OpenFileDialog openFileDialog1 = new OpenFileDialog();
openFileDialog1.InitialDirectory = "c:''" ;
openFileDialog1.Filter = "txt files (*.txt)|*.txt|All files (*.*)|*.*" ;
openFileDialog1.FilterIndex = 2 ;
openFileDialog1.RestoreDirectory = true ;
if(openFileDialog1.ShowDialog() == DialogResult.OK)
{
    if((myStream = openFileDialog1.OpenFile())!= null)
    {
//Problem here: How do i extract the numerical values from my txt file or the stream called mystream.
//  Insert code to read the stream here. 
        myStream.Close();
    }
}

如何从文本文件中提取数字

好吧，由于我们不知道您的输入格式（截至我写这篇文章时），很难告诉您如何准确地输出数字。

但以下是阅读文件每一行的大致要点。。。

if(openFileDialog1.ShowDialog() == DialogResult.OK)
{
    if((myStream = openFileDialog1.OpenFile())!= null)
    {
        using (var reader = new StreamReader(myStream))
        {
            string line;
            while ((line = reader.ReadLine()) != null)
            {
                // if it's one num per line, you can use Parse() or TryParse()
                var num = int.Parse(line);
                // otherwise, you can use something like string.Split() or RegEx...
            }
        }
    }
}
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