Community discussion forum

extracting string from []byte

• • Reply

  6 months ago

  by Inprimus

  Lanre Abiwon

  Oxford, United Kingdom

  Joined 6 months ago

  Hello. This is a P/Invoke question which, quite frankly, is doing my head in.

  I need to get a string from a []byte because calling the object.Tostring() method on he variable doesn't yield the correct information.

  given the following (which was extracted from p/invoke.net:

  Code: public static extern bool SetupDiGetDeviceRegistryProperty(IntPtr DeviceInfoSet, ref SPDEVINFODATA DeviceInfoData, uint Property, out uint PropertyRegDataType, byte[] PropertyBuffer, uint PropertyBufferSize, out uint RequiredSize);

  result = SetupDiGetDeviceRegistryProperty(deviceInfoSet, ref tBuff, (uint)SPDRP.HARDWAREID, out RegType, null, 0, out RequiredSize);

  ptrBuf = new byte[RequiredSize]; buffersize = RequiredSize;

  result = SetupDiGetDeviceRegistryProperty(deviceInfoSet, ref tBuff, (uint)SPDRP.HARDWAREID, out RegType, ptrBuf, buffersize, out RequiredSize); I need to retrieve the string returned in that variableI tried string tmp = Marshal.PtrToStringAuto(ptrBuf) but that doesn't work; although this is the way it's used in the p/Invoke example. Then I tried using Encodings (Encoding.Unicode.Getstring() ) and coughed up several other problems. In short I just need a reliable way to retrieve a string from a []byte and be able to output it to the label on my form

  Thank you very much.

  Post was edited on 14/05/2009 14:07:36 Report abuse