public static byte[] SetLength(byte[] value)
{
ushort arrLength = (ushort)(value == null ? 0 : value.Length);
byte[] data = new byte[arrLength + 2];
BitConvertHelper.GetBytes(arrLength, data, 0);
if (value != null)
{
Buffer.BlockCopy(value, 0, data, 2, value.Length);
}
return(data);
}
/// <summary>
/// 将一个元数据搭上编号
/// </summary>
/// <param name="value">元数据</param>
/// <param name="id">编号</param>
/// <param name="vt">值类型标示</param>
/// <returns>返回搭上编号后的元数据</returns>
public static byte[] SetDataId(byte[] value, int id, bool vt)
{
int offset = vt ? 1 : 5;
int len = value == null ? 0 : value.Length;
byte[] temp = new byte[(value == null ? 0 : value.Length) + offset];
temp[0] = (byte)id;
if (!vt)
{
BitConvertHelper.GetBytes(len, temp, 1);
}
//Buffer.BlockCopy(BitConverter.GetBytes(value == null ? 0 : value.Length), 0, temp, 1, 4);
if (value != null)
{
Buffer.BlockCopy(value, 0, temp, offset, value.Length);
}
return(temp);
}