c# - 如何在 C# 中添加外部文件的数据量(流读取器)

Question

我是这个网站的新手，对编程也很陌生，目前我正在尝试显示我的捐赠列表上用户姓名的计数金额，然后我还想计算出一个总和捐赠列表包含的总金额，如果有人可以帮助我创建一种方法来在donations.txt文件上添加捐赠者的数量，那将有很大的帮助，我不知道从哪里开始，但到目前为止这是我的编码:

        string sName;
        double dAmount;
        string sTotalNames;
        double dAmountTotal;
        double dAmountAverage;

    using (StreamReader sr = new StreamReader("Donations.txt"))
    {
        while (sr.Peek() != -1)
        {
            sName = sr.ReadLine();
            Console.WriteLine(sName);

            dAmount = Convert.ToDouble(sr.ReadLine());
            Console.WriteLine(dAmount);
        }

        Console.WriteLine("Press any key to close");
        Console.ReadKey();
    }

Answer 1

假设您的其他一切工作正常，创建总和将非常容易。

string sName;
double dAmount;
int sTotalNames = 0;
double dAmountTotal = 0;
double dAmountAverage;

using (StreamReader sr = new StreamReader("Donations.txt"))
{
    while (sr.Peek() != -1)
    {
        sName = sr.ReadLine();
        Console.WriteLine(sName);

        dAmount = Convert.ToDouble(sr.ReadLine());
        Console.WriteLine(dAmount);
        dAmountTotal += dAmount;
        sTotalNames++;
    }
    dAmountAverage = dAmountTotal / sTotalNames;
    Console.WriteLine("Sum = {0}", dAmountTotal );
    Console.WriteLine("Total Names = {0}", sTotalNames);
    Console.WriteLine("Average Amount = {0}", dAmountAverage);
    Console.WriteLine("Press any key to close");
    Console.ReadKey();
}