Question

目前我的代码没有插入其他数据，而是覆盖了我的测试文件中的数据。

代码片段如下：

string path = @"C:\\test.txt"; // <==NEW
StreamWriter sw = new StreamWriter(new FileStream(path, Filemode.Open, FileAccess.Write)); // <==NEW
StringBuilder Editions = new StringBuilder(400);



Editions.Insert(0, "0");
Editions.Insert(1, "0");
//Editions.Remove(9, 14);
//Editions.Insert(11, "R");
//Editions.Insert(12, "M");
//Editions.Insert(13, "A");
//Editions.Insert(14, "L");
//Editions.Insert(15, "L");
//Editions.Insert(16, " ");
//Editions.Insert(17, " ");
//Editions.Insert(18, " ");
//Editions.Insert(193, "C");
//Editions.Insert(194, "L");
sw.Write(Editions.ToString()); // <== NEW
sw.Flush(); // <== NEW
sw.Close(); // <== NEW

Answer 1

如果您需要添加更多数据，则需要以Append模式

打开文件

@"C:\\test.txt"; // <==NEW
StreamWriter sw = new StreamWriter(new FileStream(path, Filemode.Append, FileAccess.Write)); // <==NEW
StringBuilder Editions = new StringBuilder(400);


Editions.Insert(0, "0");
Editions.Insert(1, "0");
//Editions.Remove(9, 14);
//Editions.Insert(11, "R");
//Editions.Insert(12, "M");
//Editions.Insert(13, "A");
//Editions.Insert(14, "L");
//Editions.Insert(15, "L");
//Editions.Insert(16, " ");
//Editions.Insert(17, " ");
//Editions.Insert(18, " ");
//Editions.Insert(193, "C");
//Editions.Insert(194, "L");
sw.Write(Editions.ToString()); // <== NEW
sw.Flush(); // <== NEW
sw.Close(); // <== NEW

更多信息 - here

从MSDN引用：附加

打开文件（如果存在）并搜索到文件的末尾，或者创建一个新文件。这需要FileIOPermissionAccess.Append 允许。 FileMode.Append只能与。一起使用 FileAccess.Write。试图在结束之前寻找一个位置 file抛出IOException异常，任何读取尝试都失败并抛出NotSupportedException异常。

此外 - 当您使用Insert时，请注意＆＃34; ArgumentOutOfRangeException＆＃34; 。！ READ

如何使用StringBuilder写回文本文件？

1 个答案: