在前面用C#开发完CRM的来电弹屏之后,有些客户有了新的要求,他们希望不但能够实现来电弹屏,更希望能够将呼入呼出的电话录音并上传到CRM服务器上,方便日后跟踪记录。于是便有了来电小秘书客户端的开发。
来电小秘书客户端的开发是基于纽曼USB来电通客户端的基础上进行开发的,由于纽曼USB来电通的硬件没有录音功能,于是硬件上使用了纽曼的另一个硬件产品来电小秘书,虽然是同一个厂家的产品,可是它们的API却是完全不兼容,更烦的是,来电小秘书API没有来电的回调接口,无法通过回调触发程序,也没有C#的Demo,很多功能只能通过一个不是那么详细的文档和一个Delphi的Demo摸索着做了,经历了一些挫折和困惑,终于完成了这个客户端程序。
首先,开发要做的就是与硬件的API进行沟通,依然通过C#的P/Invoke来完成,以下是来电小秘书的P/Invoke代码。
- using System;
- using System.Collections.Generic;
- using System.Text;
- using System.Runtime.InteropServices;
- namespace WindowsApplication1
- {
- class LDT1
- {
- [DllImport("usbms.dll", EntryPoint = "LoadDRV")]
- public static extern int LoadDRV();
- [DllImport("usbms.dll", EntryPoint = "EnableCard")]
- public static extern int EnableCard();
- [DllImport("usbms.dll", EntryPoint = "StopSigCheck")]
- public static extern int StopSigCheck(int Handle);
- [DllImport("usbms.dll", EntryPoint = "ReSetUsb")]
- public static extern int ReSetUsb(int Handle);
- [DllImport("usbms.dll", EntryPoint = "HangUp")]
- public static extern int HangUp(int Handle);
- [DllImport("usbms.dll", EntryPoint = "InitDtmfBuf")]
- public static extern int InitDtmfBuf(int Handle);
- [DllImport("usbms.dll", EntryPoint = "SetDialPara")]
- public static extern int SetDialPara(UInt16 RingBack1, UInt16 RingBack0, UInt16 BusyLen, UInt16 RingTimes, UInt16 SendNoSignalLen);
- [DllImport("usbms.dll", EntryPoint = "DisableCard")]
- public static extern int DisableCard();
- [DllImport("usbms.dll", EntryPoint = "FreeDRV")]
- public static extern int FreeDRV();
- [DllImport("usbms.dll", EntryPoint = "GetDtmfCode")]
- public static extern int GetDtmfCode(UInt16 Line);
- [DllImport("usbms.dll", EntryPoint = "IsRing")]
- public static extern bool IsRing(UInt16 Line);
- [DllImport("usbms.dll", EntryPoint = "GetCallerIDStr")]
- public static extern UInt16 GetCallerIDStr(UInt16 Line, StringBuilder IDStr);
- [DllImport("usbms.dll", EntryPoint = "IsOffHook")]
- public static extern bool IsOffHook(UInt16 Line);
- [DllImport("usbms.dll", EntryPoint = "StartRecordFile")]
- public static extern bool StartRecordFile(UInt16 Line, string FileName, UInt32 dwRecordLen);
- [DllImport("usbms.dll", EntryPoint = "CheckRecordEnd")]
- public static extern bool CheckRecordEnd(UInt16 Line);
- [DllImport("usbms.dll", EntryPoint = "StopRecordFile")]
- public static extern bool StopRecordFile(UInt16 Line);
- [DllImport("usbms.dll", EntryPoint = "PCMtoWave")]
- public static extern int PCMtoWave(string SourceFileName, string TargetFileName);
- [DllImport("usbms.dll", EntryPoint = "ReadCheckResult")]
- public static extern int ReadCheckResult(int line, int mode);
- [DllImport("usbms.dll", EntryPoint = "StartSigCheck")]
- public static extern void StartSigCheck(int line);
- [DllImport("usbms.dll", EntryPoint = "ReadUsbState")]
- public static extern bool ReadUsbState(int line);
- [DllImport("usbms.dll", EntryPoint = "GetRingNum")]
- public static extern int GetRingNum(int line);
- [DllImport("usbms.dll", EntryPoint = "InitRingNum")]
- public static extern void InitRingNum(int line);
- [DllImport("usbms.dll", EntryPoint = "ReadSerialNo")]
- public static extern int ReadSerialNo(int line,StringBuilder serialNo);
- }
- }
然后就是关于设备状态检测了,由于没有API直接支持来电回调,所以只能自己手动的检测设备状态来判断,要实现这一部分一般有两种方式,使用Timer或者使用Thread,Delphi的Demo中使用了Timer,可是Timer实现的弊端需要使用异步的思考方式,不符合我的思维模式,灵活度也不够,而且C#创建线程太方便了,而线程是通过同步方式思考的,所以使用了Thread模式。
然后在特定的时刻,记录电话号码、弹屏(如果是来电)、电话结束后录音和上传文件和信息到CRM服务器,其中来电号码可以很容易的获取,可是播出的号码获取就比较的麻烦了,C#中可以使用如下代码:
- while (LDT1.IsOffHook((ushort)this.line))
- {
- int temp = LDT1.GetDtmfCode((ushort)this.line);
- if (temp > 0)
- {
- phonenum = phonenum + this.convertInt(temp);
- }
- Thread.Sleep(300);
- }
- private string convertInt(int code)
- {
- string ret="";
- switch (code)
- {
- case 10:
- ret = "0";
- break;
- case 11:
- ret = "*";
- break;
- case 12:
- ret = "#";
- break;
- case 13:
- ret = "A";
- break;
- case 14:
- ret = "B";
- break;
- case 15:
- ret = "C";
- break;
- case 16:
- ret = "D";
- break;
- default:
- ret = code.ToString();
- break;
- }
- return ret;
- }
下面说一下C#中的大文件上传吧,网上有很多例子了,我参考了如下blog的代码进行开发http://www.cnblogs.com/bccu/archive/2009/01/05/1363771.html,可是无法上传成功,于是我读了一下代码,发现他将信息中的\r\n用空字符代替了,导致服务器无法识别,于是我更改了他的代码,解决了问题,代码如下:
- public static string UploadFileEx(string uploadfile, string url,
- string fileFormName, string contenttype, NameValueCollection querystring,
- CookieContainer cookies)
- {
- if ((fileFormName == null) ||
- (fileFormName.Length == 0))
- {
- fileFormName = "file";
- }
- if ((contenttype == null) ||
- (contenttype.Length == 0))
- {
- contenttype = "application/octet-stream";
- }
- string postdata;
- postdata = "?";
- if (querystring != null)
- {
- foreach (string key in querystring.Keys)
- {
- postdata += key + "=" + querystring.Get(key) + "&";
- }
- }
- Uri uri = new Uri(url + postdata);
- string boundary = "----------" + DateTime.Now.Ticks.ToString("x");
- HttpWebRequest webrequest = (HttpWebRequest)WebRequest.Create(uri);
- //webrequest.CookieContainer = cookies;
- webrequest.ContentType = "multipart/form-data; boundary=" + boundary;
- webrequest.Method = "POST";
- string huanhang = "\r\n";
- byte[] huanhangbyte = Encoding.UTF8.GetBytes(huanhang);
- // Build up the post message header
- StringBuilder sb = new StringBuilder();
- sb.Append("--");
- sb.Append(boundary);
- sb.Append("\r\n");
- sb.Append("Content-Disposition: form-data; name=\"");
- sb.Append(fileFormName);
- sb.Append("\"; filename=\"");
- sb.Append(Path.GetFileName(uploadfile));
- sb.Append("\"");
- sb.Append("\r\n");
- sb.Append("Content-Type: ");
- sb.Append(contenttype);
- sb.Append("\r\n");
- sb.Append("\r\n");
- string postHeader = sb.ToString();
- byte[] postHeaderBytes = Encoding.UTF8.GetBytes(postHeader);
- // Build the trailing boundary string as a byte array
- // ensuring the boundary appears on a line by itself
- byte[] boundaryBytes =
- Encoding.ASCII.GetBytes("--" + boundary + "");
- FileStream fileStream = new FileStream(uploadfile,
- FileMode.Open, FileAccess.Read);
- long length = postHeaderBytes.Length + fileStream.Length +
- boundaryBytes.Length + huanhangbyte.Length;
- webrequest.ContentLength = length;
- Stream requestStream = webrequest.GetRequestStream();
- // Write out our post header
- requestStream.Write(postHeaderBytes, 0, postHeaderBytes.Length);
- // Write out the file contents
- byte[] buffer = new Byte[checked((uint)Math.Min(4096,
- (int)fileStream.Length))];
- int bytesRead = 0;
- while ((bytesRead = fileStream.Read(buffer, 0, buffer.Length)) != 0)
- requestStream.Write(buffer, 0, bytesRead);
- requestStream.Write(huanhangbyte, 0, huanhangbyte.Length);
- // Write out the trailing boundary
- requestStream.Write(boundaryBytes, 0, boundaryBytes.Length);
- fileStream.Dispose();
- requestStream.Dispose();
- WebResponse responce = webrequest.GetResponse();
- Stream s = responce.GetResponseStream();
- StreamReader sr = new StreamReader(s);
- string retval=sr.ReadToEnd();
- sr.Dispose();
- if (File.Exists(uploadfile))
- {
- try
- {
- File.Delete(uploadfile);
- }catch(Exception e)
- {
- }
- }
- return retval;
- }
CRM来电小秘书客户端完成了,当然要配合这个功能,服务器端CRM系统也要做一些修改,不过不是这篇文章的主要内容,关于服务器端的修改的小节,就等下次再说吧。