使用streamreader读取文本文件并在列表框中显示结果

您需要在循环中添加一个readline:

private void listView1_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
    string text;
    FileStream aFile = new FileStream("D:\\PhoneBook.txt", FileMode.Open);
    StreamReader sr = new StreamReader(aFile);
    text = sr.ReadLine();
    // Read data in line by line.
    while (text != null)
    {
        foreach (string info in text.Split(',')) 
        {
            listView1.Items.Add(info);
        }        
        // read the next line here
        text = sr.ReadLine();      
    }

    sr.Close();
}

但更好的方法是:

while(!sr.EndOfStream)
{
    text = sr.ReadLine();
    // now write ...
}

您不需要在循环中更新“文本”—只需要在循环中添加text=sr.readline();这样可以避免while循环永远持续下去!

也就是说,您可以只使用file.readalllines()。- https://docs.microsoft.com/en-us/dotnet/api/system.io.file.readalllines?view=netframework-4.7.2