在文本文件中的特定位置添加新行.

Question

我想在文件中添加特定的文本行.具体在两个边界之间.

如果我想在item1的边界之间添加一行,它会是什么样子的一个例子:

[item1]
2550 coins 995 200000 7
2550 coins 995 200000 7
2550 coins 995 200000 7
2550 coins 995 200000 7
2550 coins 995 200000 7
//Add a line here in between the specific boundaries
[/item1]
[item2]
2550 coins 995 200000 7
2550 coins 995 200000 7
2550 coins 995 200000 8
2550 coins 995 200000 7
2550 coins 995 200000 7
[/item2]
[item3]
2550 coins 995 200000 7
2550 coins 995 200000 7
2550 coins 995 200000 7
2550 coins 995 200000 7
2550 coins 995 200000 7
[/item3]

这是我到目前为止所尝试过的,但它远不是正确的.它一直说文件正在被读者使用,所以它不能被作者编辑,当我确实让它工作时它清除了整个文件.

public void createEntry(String npcName)
{
    String line;
    String fileName = "Drops.de";
    StreamWriter streamWriter = new StreamWriter(fileName);
    StreamReader streamReader = new StreamReader(fileName);
    line = streamReader.ReadLine();
    if (line == ("[" + npcName + "]"))
    {
        streamReader.ReadLine();
        streamWriter.WriteLine("Test");
    }
}

我还想知道如何在文档末尾写行.

Answer 1

这将添加您想要的行.(确保你已using System.IO;添加)

public void CreateEntry(string npcName) //npcName = "item1"
{
    var fileName = "test.txt";
    var endTag = String.Format("[/{0}]", npcName);
    var lineToAdd = "//Add a line here in between the specific boundaries";

    var txtLines = File.ReadAllLines(fileName).ToList();   //Fill a list with the lines from the txt file.
    txtLines.Insert(txtLines.IndexOf(endTag), lineToAdd);  //Insert the line you want to add last under the tag 'item1'.
    File.WriteAllLines(fileName, txtLines);                //Add the lines including the new one.
}