最近幫別人開發紐曼來電小秘書，小踩了幾個坑，在此與大家分享，給大家排排雷

坑1. 文檔不夠詳細，函數不全，更沒有介入流程介紹，總之就是一個大坑。

EnableCard()CheckLine(Line:Word)...

坑2. 沒有注明dll使用方式，是直接引用還是DllImport?

1.直接引用的話，vs會直接報錯，說明此方法錯誤
2.DllImport申明方法，使用正常

附P/Invoke代碼

using System; using System.Collections.Generic; using System.Linq; using System.Runtime.InteropServices; using System.Text;namespace Secretary {class Secretary{[DllImport("usbms.dll", EntryPoint = "LoadDRV")]public static extern int LoadDRV(); [DllImport("usbms.dll", EntryPoint = "IsRing")]public static extern bool IsRing(int Line);[DllImport("usbms.dll", EntryPoint = "ReadUsbState")]public static extern bool ReadUsbState(int line); [DllImport("usbms.dll", EntryPoint = "IsOffHook")]public static extern bool IsOffHook(UInt16 Line);[DllImport("usbms.dll", EntryPoint = "GetDtmfCode")]public static extern int GetDtmfCode(UInt16 Line);[DllImport("usbms.dll", EntryPoint = "GetCallerIDStr")]public static extern UInt16 GetCallerIDStr(UInt16 Line, StringBuilder IDStr);[DllImport("usbms.dll", EntryPoint = "ReadSerialNo")]public static extern int ReadSerialNo(UInt16 line, StringBuilder serialNo);[DllImport("usbms.dll", EntryPoint = "GetRingNum")]public static extern int GetRingNum(int line);[DllImport("usbms.dll", EntryPoint = "SetPCMode")]public static extern bool SetPCMode();[DllImport("usbms.dll", EntryPoint = "CheckLine")]public static extern bool CheckLine(UInt16 line);[DllImport("usbms.dll", EntryPoint = "InitRingNum")]public static extern void InitRingNum(int line);[DllImport("usbms.dll", EntryPoint = "EnableCard")]public static extern int EnableCard();} }

坑三. 沒有C#版本DEMO，只有Delphi版本DEMO

于是苦逼的我，一遍顯示器開著Delphi版本的DEMO，一遍手寫C#程序，強調各位一定要把Delphi的demo邏輯理清楚，也可以按照完全模仿。

附我整理的Delphi流程（c#基本實現此流程基本的功能均能ok）
1.Init

//record對應c#中的class type TLines = record Status:integer; Timer:integer; OldRingCounter:integer; IsLine:Boolean; IsKeyUpOld:Boolean; end; //對象數組 Lines:array[0..2] of Tlines; //對應c#中stringbuilder Serial:array[0..10] of char; const STATUS_FREE = 0 ; const STATUS_RING = 1 ; const STATUS_WAIT_FSK = 2 ; const STATUS_WAIT_RING_END = 3 ;const STATUS_HANGUP = 4 ; const STATUS_WAIT_HANGUP_END = 5 ; const STATUS_RECORD = 6 ; const STATUS_PLAY = 7 ; const STATUS_SEND = 8 ;Lines[0].Status := STATUS_FREE ; Lines[1].Status := STATUS_FREE ; Lines[2].Status := STATUS_FREE ;usbcount := LoadDRV; if usbcount > 0 then beginstr:='加載USB驅動設備成功!';if EnableCard =1 thenbeginstr:='啟動USB設備成功!';ReadSerialNo(0,Serial);str := '序列號=';for i:=0 to 4 do beginstr:= str+','+inttostr(ord(Serial[i]));end;//注意定時器啟動了Timer1.Enabled := true;DeviceState := false;end;SetPCMode(); end else beginstr:='加載USB驅動設備失敗!'; end;

2.Timer
2.1 GetTrunkState(0)

//line = 0 //<> -> != =->== =:->= if Lines[line].IsLine <> CheckLine(line) thenbeginif Lines[line].IsLine thenbeginstr := '外線斷開'end elsebeginstr := '外線接通'end;Memo1.Lines.Add(str);Lines[line].IsLine := CheckLine(line);end;//對應c# switch .. case case Lines[line].Status ofSTATUS_FREE:beginif IsRing(line) thenbeginLines[line].OldRingCounter := GetRingNum(line);Memo1.Lines.Add('外線振鈴'+inttostr(Lines[line].OldRingCounter));Lines[line].Status := STATUS_RING ;end;if IsOffHook(line) thenbeginMemo1.Lines.Add('外線摘機');Lines[line].Status := STATUS_HANGUP ;end;end;STATUS_RING:beginif IsRing(line) thenbeginend elsebeginLines[line].Status := STATUS_WAIT_FSK;Lines[line].Timer := 0;end;end;STATUS_WAIT_FSK:beginsetlength(str,200);if (GetCallerIDStr(line,pchar(str))=3) thenbeginstr :='外線來電='+ string((str));Memo1.Lines.Add(str);end;inc(Lines[line].Timer);if ( GetRingNum(line) > 1) or ( Lines[line].Timer > 50 ) thenbeginLines[line].Status := STATUS_WAIT_RING_END ;Lines[line].Timer := 0;end;if Lines[line].OldRingCounter <> GetRingNum(line) thenbeginLines[line].OldRingCounter := GetRingNum(line);Memo1.Lines.Add('外線振鈴'+inttostr(Lines[line].OldRingCounter));end;end;STATUS_WAIT_RING_END:beginif IsRing(line) thenbeginif Lines[line].OldRingCounter <> GetRingNum(line) thenbeginLines[line].OldRingCounter := GetRingNum(line);Memo1.Lines.Add('外線振鈴'+inttostr(Lines[line].OldRingCounter));end;Lines[line].Timer := 0;end else if Lines[line].Timer > 50 thenbeginMemo1.Lines.Add('外線空閑');Lines[line].Status := STATUS_FREE;Lines[line].Timer := 0;InitRingNum(line);end;inc(Lines[line].Timer);end;STATUS_HANGUP:beginif not IsOffHook(line) thenbeginMemo1.Lines.Add('外線掛機');Lines[line].Status := STATUS_FREE ;end;end;STATUS_RECORD:beginif CheckRecordEnd(line) then beginMemo1.Lines.Add(datetimetostr(now)+'錄音結束');Lines[line].Status := STATUS_FREE ;end;end;STATUS_PLAY:beginif CheckPlayEnd(line) then beginMemo1.Lines.Add(datetimetostr(now)+'放音結束'+inttostr(line));Lines[line].Status := STATUS_FREE ;end;end;STATUS_SEND:beginif CheckSendEnd(line) then beginMemo1.Lines.Add(datetimetostr(now)+'撥號結束'+inttostr(line));Lines[line].Status := STATUS_FREE ; end;end;end;

2.2 GetUserState(1)

//line = 1 if DeviceState <> ReadUsbState(line) thenbeginif DeviceState thenstr := datetimetostr(now)+':設備移除'elsestr := datetimetostr(now)+':設備接入';DeviceState := ReadUsbState(line);Memo1.Lines.Add(str);end;

實現效果圖

附：Delphi與c#類型轉換對照表

附：使用C#開發紐曼USB來電小秘書客戶端小結

至此小秘書的c#版本demo開發基本完成，其功能自行添加修改。如需完整代碼，請訪問我的博客

聲明：原創聲明，版權聲明。

轉載于:https://www.cnblogs.com/wlei24/p/5736404.html

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