Question

我正在尝试从文本文件中读取数字，每个数字都在它自己的行上。显示有多少个数字，并添加这些数字。到目前为止，这是我的代码。

private void readFileButton_Click(object sender, EventArgs e)
    {
        try
        {
        openFileDialog1.ShowDialog();
            filePathReader = openFileDialog1.FileName;

            //declare the variable to read the file
            string numbersFromFile;
            infile = File.OpenText(filePathReader);

                //reads the contents
                while (!infile.EndOfStream)
            {
                //get the numbers
                numbersFromFile = infile.ReadLine();
                //add numbers to the listBox
                numbers.Items.Add(numbersFromFile);
            }
            numbers.Items.Add("How many numbers the file has and the Total of the random NUmbers");

            //closethe file
            infile.Close();
            //Here I am supposed to display the total of the numbers there is a way to turn text data into int data
            //and the total numbers the user wanted..say there are a total of blah random numbers
        }
        catch (Exception ex)
        {
            //display error message
            MessageBox.Show(ex.Message);
        }

Answer 1

首先，如果您需要阅读整个文件，请一次性阅读整个文件。

var path = "myfile.txt";
var allLines = File.ReadAllLines(path);
var count = allLines.length;
var sum = allLines.Select(s=> int.Parse(s)).Sum();

Answer 2

显示有多少个数字，

var numbers = new List<int>();
numbers.Add(int.Parse(numbersFromFile));
int count = numbers.Count;

并添加这些数字

int sum = numbers.Sum();

确保导入using System.Linq

如何从文本文件中读取数字，在列表框控件中显示数字，然后显示以下数据？

2 个答案: