/// 计算指定文件的 CRC32。
public static byte[] GetCrc32(string fileName)
{
if (!File.Exists(fileName))
{
return(Zero);
}
using (FileStream fileStream = new FileStream(fileName, FileMode.Open, FileAccess.Read))
{
Crc32 calculator = new Crc32();
byte[] result = calculator.ComputeHash(fileStream);
calculator.Clear();
return(result);
}
}
/// 计算二进制流的 CRC32。
public static byte[] GetCrc32(byte[] bytes)
{
if (bytes == null)
{
return(Zero);
}
using (MemoryStream memoryStream = new MemoryStream(bytes))
{
Crc32 calculator = new Crc32();
byte[] result = calculator.ComputeHash(memoryStream);
calculator.Clear();
return(result);
}
}
/// <summary>
/// 计算指定文件的CRC32值
/// </summary>
public static string CRC32(string fileName)
{
string hashCRC32 = string.Empty;
if (File.Exists(fileName))
{
using (FileStream fs = new FileStream(fileName, FileMode.Open, FileAccess.Read))
{
Crc32 calculator = new Crc32();
byte[] buffer = calculator.ComputeHash(fs);
calculator.Clear();
System.Text.StringBuilder stringBuilder = new System.Text.StringBuilder();
for (int i = 0; i < buffer.Length; i++)
{
stringBuilder.Append(buffer[i].ToString("x2"));
}
hashCRC32 = stringBuilder.ToString();
}
}
return(hashCRC32);
}
}//ComputeMD5
/// <summary>
/// 计算指定文件的CRC32值
/// </summary>
/// <param name="fileName">指定文件的完全限定名称</param>
/// <returns>返回值的字符串形式</returns>
public static String GetCRC32(String fileName)
{
String hashCRC32 = String.Empty;
//检查文件是否存在，如果文件存在则进行计算，否则返回空值
if (File.Exists(fileName))
{
using (FileStream fs = new FileStream(fileName, FileMode.Open, FileAccess.Read))
{
//计算文件的CSC32值
Crc32 calculator = new Crc32();
Byte[] buffer = calculator.ComputeHash(fs);
calculator.Clear();
//将字节数组转换成十六进制的字符串形式
StringBuilder stringBuilder = new StringBuilder();
for (int i = 0; i < buffer.Length; i++)
{
stringBuilder.Append(buffer[i].ToString("x2"));
}
hashCRC32 = stringBuilder.ToString();
}//关闭文件流
}
return hashCRC32;
}//ComputeCRC32
