微信公共服务平台开发（.Net 的实现）4-------语音识别

语音识别这个功能属于高级功能，必须微信实名认证后才能实现，认证费用300元/年，如果你作为开发者可以申请测试帐号，也是可以的。首先建立一个微信消息类，这个类比之前多了一个属性。

[csharp]
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class wxmessage

{
public string FromUserName {
get; set; }

public string ToUserName {
get; set; }

public string MsgType {
get; set; }

public string EventName {
get; set; }

public string Content {
get; set; }

public string Recognition {
get; set; }

public string EventKey {
get; set; }

}

class wxmessage
{
public string FromUserName { get; set; }
public string ToUserName { get; set; }
public string MsgType { get; set; }
public string EventName { get; set; }
public string Content { get; set; }
public string Recognition { get; set; }
public string EventKey { get; set; }
}

语音识别是微信自带的功能，非常强大无需我们做过多的操作：

[csharp]
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protected void Page_Load(object sender, EventArgs e)

{
wxmessage wx = GetWxMessage();
string res = "";

if (!string.IsNullOrEmpty(wx.EventName) && wx.EventName.Trim() ==
"subscribe")
{//刚关注时的时间，用于欢迎词

string content =
"";
content = "/:rose欢迎北京永杰友信科技有限公司/:rose\n直接回复“你好”";

res = sendTextMessage(wx, content);
}
else
{
if (wx.MsgType ==
"text" && wx.Content == "你好")

{
res = sendTextMessage(wx, "你好,欢迎使用北京永杰友信科技有限公司公共微信平台!");

}
else if (wx.MsgType ==
"voice")//识别消息类型为语音

{
res = sendTextMessage(wx, wx.Recognition);//wx.Recognition就是语音识别的结果了，我们直接引用，以文本形式反馈就OK了

}
else

{
res = sendTextMessage(wx,
"你好,未能识别消息!");
}
}

Response.Write(res);
}

private wxmessage GetWxMessage()

{
wxmessage wx = new wxmessage();

StreamReader str = new StreamReader(Request.InputStream, System.Text.Encoding.UTF8);

XmlDocument xml = new XmlDocument();

xml.Load(str);
wx.ToUserName = xml.SelectSingleNode("xml").SelectSingleNode("ToUserName").InnerText;

wx.FromUserName = xml.SelectSingleNode("xml").SelectSingleNode("FromUserName").InnerText;

wx.MsgType = xml.SelectSingleNode("xml").SelectSingleNode("MsgType").InnerText;

if (wx.MsgType.Trim() ==
"text")
{
wx.Content = xml.SelectSingleNode("xml").SelectSingleNode("Content").InnerText;

}
if (wx.MsgType.Trim() ==
"event")
{
wx.EventName = xml.SelectSingleNode("xml").SelectSingleNode("Event").InnerText;

}
if (wx.MsgType.Trim() ==
"voice")//如果是语音消息的话就把识别结果赋值给实体类的相应属性Recognition

{
wx.Recognition = xml.SelectSingleNode("xml").SelectSingleNode("Recognition").InnerText;

}

return wx;
}

/// <summary>
/// 发送文字消息

/// </summary>
/// <param name="wx">获取的收发者信息

/// <param name="content">内容

/// <returns></returns>

private string sendTextMessage(wxmessage wx,
string content)
{
string res = string.Format(@" ",

wx.FromUserName, wx.ToUserName, DateTime.Now, content);

return res;
}