copy of gsmlib.cs

来自「c# 基于windows mobile 访问基站信息源程序」· CS 代码 · 共 61 行

using System;
using System.Text;
using System.Runtime.InteropServices;

namespace NiceTracker.Libraries
{
	/// <summary>
	/// Summary description for GSMLib.
	/// </summary>
	public class GSMLib
	{
		[DllImport("NiceRIL.dll")]
		private static extern IntPtr GetCREG( IntPtr comPort );

		[DllImport("NiceRIL.dll")]
		private static extern IntPtr GetCSQ( IntPtr comPort );
	
		[DllImport("NiceRIL.dll")]
		private static extern IntPtr GetCCED( IntPtr comPort );
	
		public GSMLib()
		{}

		public static string PerformCREG( )
		{
			IntPtr creg = GetCREG( IntPtr.Zero );			
			
			return IntPtrToString( creg );
		}

		public static string PerformCCED( )
		{
			IntPtr cced = GetCCED( IntPtr.Zero );			
			
			return IntPtrToString( cced );
		}

		public static string PerformCSQ( )
		{
			IntPtr csq = GetCSQ( IntPtr.Zero );			
			return IntPtrToString( csq );

		}

		private static string IntPtrToString( IntPtr ptr )
		{
			string output = "";
			char c = (char)Marshal.ReadByte( ptr );

			while ( c != '\r' )
			{			
				output += c;
				ptr = (IntPtr)((int)ptr + 1);				
				c = (char)Marshal.ReadByte( ptr );
			}
			
			return output;
		}
	}
}