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private void button3_Click(object sender, EventArgs e)
{
StreamReader sr = new StreamReader("C:\\ls1.txt", Encoding.Default);
StreamWriter sw = new StreamWriter("C:\\ls2.txt",false,Encoding.Default);
while (true)
{
string str = sr.ReadLine();
if (str == null) break;
else sw.WriteLine(str.Replace("旧值", "新值"));
}
sr.Close();
sw.Close();
}
public void TestReplace()
{
String js = String.Empty;
using (FileStream fs = new FileStream("a.js", FileMode.Open, FileAccess.Read))
{
StreamReader sr = new StreamReader(fs);
js = sr.ReadToEnd();
sr.Close();
}
js = js.Replace("Old words","New words");
using (FileStream fs = new FileStream("a.js", FileMode.Create, FileAccess.ReadWrite))
{
StreamWriter sw = new StreamWriter(fs);
sw.Write(js);
sw.Close();
}
}
private void button1_Click(object sender, EventArgs e)
{
string str = File.ReadAllText("C:\\ls1.txt", Encoding.Default);
str.Replace("张三", "李四"); // 张三 --> 李四
File.WriteAllText("C:\\ls2.txt", str, Encoding.Default);
}
string st = "aaaaaaaaaa\r\n" +
"bbbbbbbbbbbbbb";
st = st.Replace("aaaaaaaaaa", "A!"); //在这里就将aaaaaaaaaa替换成了A!
Console.WriteLine(st);