wsaqueryset.cs

蓝牙传输控件,用于蓝牙文件上传和下载。芯片只要选用crs

using System;
using System.Runtime.InteropServices;
using bluetoothX;


namespace bluetoothX
{
    [StructLayout(LayoutKind.Sequential, Size=60)]
    internal struct WSAQUERYSET
    {
        public int dwSize;

        [MarshalAs(UnmanagedType.LPStr)]
        public string lpszServiceInstanceName;

        public IntPtr lpServiceClassId;
        IntPtr lpVersion;
        IntPtr lpszComment;
        public int dwNameSpace;
        IntPtr lpNSProviderId;

        [MarshalAs(UnmanagedType.LPStr)]
        public string lpszContext;

        int dwNumberOfProtocols;
        IntPtr lpafpProtocols;
        IntPtr lpszQueryString;
        public int dwNumberOfCsAddrs;
        public IntPtr lpcsaBuffer;
        int dwOutputFlags;

        public IntPtr lpBlob;
    }

	internal class WsaQuerySet : IDisposable
	{
		public const int Length = 60;

		private byte[] data;
		private oBLOB blob;

		private GCHandle blobHandle;

		public WsaQuerySet()
		{
			data = new byte[60];
			//write size
			BitConverter.GetBytes((int)60).CopyTo(data, 0);
			//set namespace
			BitConverter.GetBytes((int)16).CopyTo(data, 20);
		}

		public byte[] ToByteArray()
		{
			return data;
		}

		public void Dispose()
		{
			if(blobHandle.IsAllocated)
			{
				blobHandle.Free();
			}
		}

		public string ServiceInstanceName
		{
			get
			{
				return Marshal.PtrToStringUni((IntPtr)BitConverter.ToInt32(data, 4));
			}
		}

		public Guid ServiceClassId
		{
			get
			{
				IntPtr pGuid = (IntPtr)BitConverter.ToInt32(data, 8);
				byte[] guidbytes = new byte[16];
				Marshal.Copy(pGuid, guidbytes, 0, 16);
				return new Guid(guidbytes);
			}
		}

		public BTHNS_BLOB Blob
		{
			get
			{
                		return (BTHNS_BLOB)blob.pBlobData;
			}
			set
			{


		                blob = new oBLOB();
		                blob.cbSize = value.Length;
		                blob.pBlobData = value;

				//free old handle
				if(blobHandle.IsAllocated)
				{
					blobHandle.Free();
				}

				if(value != null)
				{
		                    blobHandle = GCHandle.Alloc(blob.ToByteArray(), GCHandleType.Pinned);
		                    BitConverter.GetBytes(blobHandle.AddrOfPinnedObject().ToInt32()).CopyTo(data, 56);			
				}	
			}
		}
	}

}