static void AddFileFix(string fileFullName, string prefix, string suffix)
{
try
{
if (string.IsNullOrEmpty(prefix) && string.IsNullOrEmpty(suffix))
{
return;
}
if (string.IsNullOrEmpty(prefix) && !string.IsNullOrEmpty(suffix))
{
FileStream fs_a = new FileStream(fileFullName, FileMode.Append);
StreamWriter sw_a = new StreamWriter(fs_a);
sw_a.Write(suffix);
sw_a.Close();
fs_a.Close();
return;
}
char[] buffer = new char[10000];
string renamedFile = fileFullName + ".orig";
File.Move(fileFullName, renamedFile);
using (StreamReader sr = new StreamReader(renamedFile))
using (StreamWriter sw = new StreamWriter(fileFullName, false))
{
if (!string.IsNullOrEmpty(prefix))
sw.Write(prefix);
int read;
while ((read = sr.Read(buffer, 0, buffer.Length)) > 0)
sw.Write(buffer, 0, read);
if (!string.IsNullOrEmpty(suffix))
sw.Write(suffix);
}
File.Delete(renamedFile);
}
catch (Exception ex)
{
throw ex;
}
}
参考:
https://qa.1r1g.com/sf/ask/70611971/
标签:第一行,string,C#,sw,prefix,添加,new,IsNullOrEmpty,suffix From: https://www.cnblogs.com/huvjie/p/16968692.html