写入新文本文件时替换StreamWriter

Question

Is there any possible way to replace a character with a string, like to say replace '\\x0A' with "\\r\\n" for example. This is my code and I honestly can't find a way to put it in, not to mention that the Replace function does not allow String.Replace(Char, String) or String.Replace(String, Char)

StreamWriter wwrite = new StreamWriter(sfd.FileName, false, Encoding.GetEncoding("EUC-JP"));
for (int i = 0; i < listView1.Items.Count; ++i)
{
    wwrite.WriteLine((i + 1).ToString() + "＾" + listView1.Items[i].SubItems[3].Text);
}
wwrite.Close();

Answer 1

You can replace a character with a string by simply converting the character to a string and then calling the Replace(string, string) overload. For instance:

wwrite.WriteLine((i + 1).ToString() + "＾" + listView1.Items[i].SubItems[3].Text.Replace("\x0A", "\r\n"));

You seem to be confused about strings. Strings are simply a collection of characters. So "\\n" and '\\n' are essentially the same value. The first stores the value as a single character string and the second stores the same value as a character. If you want to replace a new-line character with the actual string \\n (as two separate characters), you need to escape the backslash, for instance:

s = s.Replace("\n", "\\n");

Or:

s = s.Replace("\n", @"\n");

Answer 2

用Google 搜寻 StreamReader和StreamWriter并发现