int num = 12345;
string num1 = Convert.ToString(12345, 16);
byte[] bytes = BitConverter.GetBytes(num);//将int32转换为字节数组
num = BitConverter.ToInt32(bytes, 0);//将字节数组内容再转成int32类型
string no = DateTime.Now.ToString("yyyyMMddhhmmssfff"); //时间转字符串
Console.WriteLine(no);
private void button1_Click(object sender, EventArgs e)
{
// //字符串到16进制
// string s = "I have";
// string sHex = "";
// byte[] sbytes = Encoding.Default.GetBytes(s);
// for (int i = 0; i < sbytes.Length; i++)
// {
// sHex += sbytes[i].ToString("X2") + " ";
// }
// //整型到16进制
// int i25 = 25;
// string i25Hex = "";
// i25Hex = i25.ToString("X2");
// //浮点数到16进制
// double d = 3.14157;
// string dHex = "";
// //dHex = d.ToString("X2");//报错
// byte[] dbytes = Encoding.Default.GetBytes(d.ToString());
// for (int i = 0; i < dbytes.Length; i++)
// {
// dHex += dbytes[i].ToString("X2") + " ";
// }
// bool b = true;
// string bHex = "";
// //create the file
// BinaryWriter bw = new BinaryWriter(new FileStream("mydata", FileMode.Create));
// //bw.Write(i25);//写入1个25
//// bw.Write(d);
//// bw.Write(b);
// bw.Write(s);//写入一个字符串
// bw.Close();
// MessageBox.Show("ccc");
//reading from the file
BinaryReader br = new BinaryReader(new FileStream("mydata.pdf", FileMode.Open));
//var i25 = br.ReadInt32();
//var d = br.ReadDouble();
//var b = br.ReadBoolean();
// var A0 =br.ReadByte(); //读取一个字节(第一个FF(25)(10进制)37)
//byte[] bytes = new byte[1000];//每个值为0
//for (int i = 0; i < bytes.Length;i++ )
//{
// bytes[i] = br.ReadByte();
//}
br.BaseStream.Seek(6236060, SeekOrigin.Begin);// 定位到第6236060个字节
var test = br.BaseStream.Length - br.BaseStream.Position;//总长度-当前位置, 可能是读取到最后
byte[] bytes = br.ReadBytes((int)test);
while (br.BaseStream.Position < br.BaseStream.Length)
{
// bytes[i] = br.ReadByte(); //读取到最后
}
using (BinaryReader br = new BinaryReader(fs))
{
while (br.PeekChar() > -1)
{
// bytes[i] = br.ReadByte(); //读取到最后
}
}
//var s1 = br.ReadString();
MessageBox.Show("ccc");
string str = System.Text.Encoding.Default.GetString(bytes);
br.Close();
}
public void F1()
{
string path = @"C:\a.txt";
FileStream fs = new FileStream(path, FileMode.Open, FileAccess.Read);
BinaryReader br = new BinaryReader(fs);
char cha; int num; double doub; string str;
try
{
while (true)
{
cha = br.ReadChar();//从当前流中读取下一个字符
num = br.ReadInt32(); //从当前流中读取4字节有符号整数
doub = br.ReadDouble(); //从当前流中读取8字节浮点值
str = br.ReadString();//从当前流中读取一个字符串
Console.WriteLine("{0},{1},{2},{2}", cha, num, doub, str);
}
}
catch (EndOfStreamException e)
{
Console.WriteLine(e.Message);
Console.WriteLine("已经读到末尾");
}
finally
{
Console.ReadKey();
}
}