C#調用傳回值為字串的dll api,偵錯模式下崩潰

件的api傳回值都是字串類型,考慮vs2012中C#的託管指標調試可能有改動.所以將傳回值類型修改為

IntPtr,在調用api後,將傳回值用Marshal.PtrToStringAnsi轉為字串,解決方案繁瑣了點,不知有無更

好的方案了.

C#代碼

代碼如下

複製代碼

using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Runtime.InteropServices; using System.IO; using System.Collections;   namespace QQ超人打碼範例 {       class Program     {                    [DllImport("dc.dll")]         private static extern IntPtr GetUserInfo(string user, string pass);         [DllImport("dc.dll")]         private static extern IntPtr RecByte_A(byte[] img, int imgLen, string user, string pass, string softId);         [DllImport("dc.dll")]         private static extern IntPtr RecYZM_A(string imgPath, string user, string pass, string softId);         [DllImport("dc.dll")]         private static extern void ReportError(string user, string worker);         static void Main(string[] args)         {             //帳號配置             string user = "user";             string pass = "pass";             string softId = "0";               //查詢剩餘點數             IntPtr info = GetUserInfo(user, pass);             Console.WriteLine("剩餘點數{0}",Marshal.PtrToStringAnsi(info));                          //按圖片資料識別驗證碼             FileStream fs = new FileStream("code.jpg", FileMode.Open,FileAccess.Read);             byte[] bFile = new byte[fs.Length];             BinaryReader r = new BinaryReader(fs);             bFile=r.ReadBytes((int)fs.Length);             r.Close();             r=null;             fs.Close();               Console.WriteLine("RecByte_A驗證碼遠程識別中");             IntPtr result = RecByte_A(bFile, bFile.Length, user, pass, softId);             Console.WriteLine("返回的驗證碼識別結果:{0}", Marshal.PtrToStringAnsi(result));                           //按圖片路徑識別驗證碼             Console.WriteLine("RecYZM_A驗證碼遠程識別中");             IntPtr result2 = RecYZM_A("code.jpg", user, pass, softId);             Console.WriteLine("返回的驗證碼識別結果:{0}", Marshal.PtrToStringAnsi (result2));               /*             //報告錯誤 只有在確定驗證碼錯誤的情況下才調用該函數             string worker = "F36B1D3A30474A75B497D82FC6342CFC";             ReportError(user,worker);             */             Console.Read();         }     } }

有個類似的例子就是python下的調用,python調用的時候,也是返回託管的字串指標,需要用

ctypes.string_at將指標轉換為字串

代碼如下

複製代碼

# -*- coding:utf-8 -*- import ctypes import sys from os.path import join, dirname, abspath, exists   dll = ctypes.windll.LoadLibrary(join(dirname(__file__),'dc.dll'))   class dcVerCode:     #user QQ超人打碼帳號     #pwd QQ超人打碼密碼     #softId 軟體ID 預設為0,作者務必提交softId,已保證分成     def __init__(self,user,pwd,softId="0"):         self.user = user         self.pwd = pwd         self.softId = softId       #擷取帳號剩餘點數     def getUserInfo(self):         p = dll.GetUserInfo(self.user,self.pwd)         if p:             return ctypes.string_at(p,-1)         return ''       def parseResult(self,result):         list = result.split('|')         if len(list)==3:             return (list[0],list[2])         return (NULL,NULL)       #recByte 根據圖片位元據識別驗證碼,返回驗證碼,打碼工人編號     #buffer 圖片位元據     def recByte(self,buffer):         p = dll.RecByte_A(buffer,len(buffer),self.user,self.pwd,self.softId)         if p:             str = ctypes.string_at(p,-1)             return self.parseResult(str)         return ''       #recYZM 根據驗證碼路徑識別,返回驗證碼,打碼工人編號     #path 圖片路徑     def recYZM(self,path):         p = dll.RecYZM_A(path,self.user,self.pwd,self.softId)         if p:             str = ctypes.string_at(p,-1)             return self.parseResult(str)         return ''       #reportErr 提交識別錯誤驗證碼     #worker 打碼工人編號     def reportErr(self,worker):         dll.ReportError(self.user,worker)   if __name__ == '__main__':     client = dcVerCode("user","pass","0");     img = open('c:\123.jpg','rb')     buffer = img.read()     img.close()     print (client.getUserInfo())     yzm,worker = client.recByte(buffer)     print(yzm,worker)     yzm,worker = client.recYZM("c:\123.jpg")     print ( yzm,worker )     #client.reportErr(worker)

只有在驗證碼識別錯誤時才運行這個方法,惡意提交將會受到懲罰