写文件 StreamWriter sw = new StreamWriter(fileName); sw.Write(textBox1.Text); sw.Close(); 读文件 StreamReader sr = new StreamReader(fileName); textBox1.Text = sw.ReadToEnd(); sr.Close();StreamReader和StreamWriter是专门针对文本文件的读写器。 对于二进制文件可以考虑使用BinaryReader和BinaryWriter,不过他们的构造函数要传入一个FileStreamFileStream fs = File.Open(fileName); BinaryReader br=new BinaryReader(fs); BinaryWriter bw = new BinaryWriter(fs);另:需要引用 System.IO 命名空间
1.你可以直接用File.Move()方法或者FileInfo 的MoveTo()方法直接移动文件System.IO操作 try { // Create an instance of StreamReader to read from a file. // The using statement also closes the StreamReader. using (StreamReader sr = new StreamReader("TestFile.txt")) { String line; // Read and display lines from the file until the end of // the file is reached. while ((line = sr.ReadLine()) != null) { Console.WriteLine(line); } } } catch (Exception e) { // Let the user know what went wrong. Console.WriteLine("The file could not be read:"); Console.WriteLine(e.Message); }
StreamWriter sw = new StreamWriter(fileName);
sw.Write(textBox1.Text);
sw.Close();
读文件
StreamReader sr = new StreamReader(fileName);
textBox1.Text = sw.ReadToEnd();
sr.Close();StreamReader和StreamWriter是专门针对文本文件的读写器。
对于二进制文件可以考虑使用BinaryReader和BinaryWriter,不过他们的构造函数要传入一个FileStreamFileStream fs = File.Open(fileName);
BinaryReader br=new BinaryReader(fs);
BinaryWriter bw = new BinaryWriter(fs);另:需要引用 System.IO 命名空间
try
{
// Create an instance of StreamReader to read from a file.
// The using statement also closes the StreamReader.
using (StreamReader sr = new StreamReader("TestFile.txt"))
{
String line;
// Read and display lines from the file until the end of
// the file is reached.
while ((line = sr.ReadLine()) != null)
{
Console.WriteLine(line);
}
}
}
catch (Exception e)
{
// Let the user know what went wrong.
Console.WriteLine("The file could not be read:");
Console.WriteLine(e.Message);
}
引用楼上
读:TextBox1.Text=File.ReadAllText("d:/b.txt",Encoding.Default);
写:File.WriteAllText("d:/a.txt", TextBox1.Text, Encoding.Default);
追加:File.AppendAllText("d:/a.txt", TextBox1.Text, Encoding.Default);
读:TextBox1.Text=File.ReadAllText("d:/b.txt",Encoding.Default);
写:File.WriteAllText("d:/a.txt", TextBox1.Text, Encoding.Default);
追加:File.AppendAllText("d:/a.txt", TextBox1.Text, Encoding.Default);这个方法好啊个人主页:
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//写文件
StreamWriter sw = new StreamWriter(fileName);
sw.Write(textBox1.Text);
sw.Close();
//读文件
StreamReader sr = new StreamReader(fileName);
textBox1.Text = sw.ReadToEnd();
sr.Close(); //StreamReader和StreamWriter是专门针对文本文件的读写器。
//对于二进制文件可以考虑使用BinaryReader和BinaryWriter,不过他们的构造函数要传入一个FileStream FileStream fs = File.Open(fileName);
BinaryReader br=new BinaryReader(fs);
BinaryWriter bw = new BinaryWriter(fs);
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读:TextBox1.Text=File.ReadAllText("d:/b.txt",Encoding.Default);
写:File.WriteAllText("d:/a.txt", TextBox1.Text, Encoding.Default);
追加:File.AppendAllText("d:/a.txt", TextBox1.Text, Encoding.Default);
但是如果文本框的值是空的话,在写入时会把原来文本文件的内容全部清空!