C#读写文件：十进制转十六进制

写文件有时需要进行进制的转换，下面一个例子是十进制转十六进制，并写入文件。这里用到了进制的转换和C#文件写入的知识。
十进制转十六进制的方法：

public class HexadecimalConversion { public static void WriteBinaryFile(UInt32 data, BinaryWriter fileBinary)//十进制转十六进制 { byte ch1, ch2, ch3, ch4; ch1 = Convert.ToByte(data % 256); //低一位 ch2 = Convert.ToByte((data / 256) % 256); //低高位 ch3 = Convert.ToByte((data / 256 / 256) % 256); //高一位 ch4 = Convert.ToByte((data / 256 / 256 / 256) % 256); //高高位 fileBinary.Write(ch1); fileBinary.Write(ch2); fileBinary.Write(ch3); fileBinary.Write(ch4); } }

 调用转换，并写入文件：

class Program { static void Main(string[] args) { string filepath = @"F:\test.my"; UInt32 testData = 100; FileStream fileStream = null; BinaryWriter binaryWriter = null; try { if (!File.Exists(filepath)) { using (File.Create(filepath)) { } } fileStream = new FileStream(filepath, FileMode.Open); binaryWriter = new BinaryWriter(fileStream, System.Text.Encoding.GetEncoding("GBK")); fileStream.Seek(0, SeekOrigin.Begin); HexadecimalConversion.WriteBinaryFile(testData, binaryWriter); } catch { } finally { if (fileStream != null) { fileStream.Close(); } if (binaryWriter != null) { binaryWriter.Close(); } } } }

运行后，用UE打开文件可以看到已经将100转换为十六进制了：