C＃保存到一个文本文件中多行 [英] C# save to multiple lines in a text file

问题描述

我一直在这样做了大学的项目，并遇到了一个问题。我已成功地从文件加载多行，但我无法将它们保存回一个文件中。我还能再救一个字符串的文件，这是处理的最后一个字符串，但就是这样。我会那样做完全执行循环不对，但我想不出任何其他方式做到这一点。对于saveFile的部分编码如下：

I have been doing this for a university project and have run into a problem. I have managed to load multiple lines from a file but I am unable to save them back to a file. I can save a single string to the file, which is the last string processed but that is it. I may be doing it completely wrong by performing a loop, but I cant think of any other way to do it. The coding for the savefile section is as follows:

    case "s":
    case "8":
        {
            int savecount = 0;
            string savestring = "";

            //Clear the text file ready to be saved
            using (FileStream fs = File.Create("billing.txt"))
            {

            }

            while (savecount != CustomerCount)
                {
                    using (StreamWriter save = new StreamWriter("billing.txt"))
                        {
                //Create the string to save to the file
                            savestring = CustomerNumber[savecount] + ","
                              + CustomerName[savecount] + ","
                              + Address[savecount] + ","
                              + RateScheme[savecount] + ","
                              + PeakKWH[savecount] + ","
                              + OffPeakKWH[savecount] + ","
                              + StandardKWH[savecount];

                            Console.WriteLine(savestring);

                            save.WriteLine(savestring);

                            savecount++;
                            Console.ReadLine();
                          }
                 }
            Console.WriteLine("All data saved successfully");
            Console.ReadLine();
            break;
        }

不知道从哪里何去何从。任何帮助，将不胜感激。

Not sure where to go from here. Any help would be appreciated

推荐答案

您应该打开文件保存的前的循环。例如：

You should open the file for saving before the loop. E.g.

using (StreamWriter save = new StreamWriter("billing.txt")) {
    while (savecount != CustomerCount) { 
        // rest of your code here

目前，您正在打开在每个循环中的文件，写一个线路输出。然后重新打开它（和丢失已写入的数据）。

At the moment, you are opening the file in each loop, writing a line out. Then re-opening it (and losing the data already written).

正如评论指出的那样，你不需要调用文件.Create 。默认情况下，的StreamWriter 将覆盖现有文件。

As pointed out in the comments, you don't need to call File.Create. By default the StreamWriter will overwrite the existing file.

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