.Net微信网页开发之JSSDK使用步骤和配置信息timestamp(时间戳)，nonceStr(随机串)，signature(签名)，access_token(接口调用凭据)的生成获取讲解

<script src="http://res.wx.qq.com/open/js/jweixin-1.4.0.js"></script>

wx.config({
debug: true, // 开启调试模式,调用的所有api的返回值会在客户端alert出来，若要查看传入的参数，可以在pc端打开，参数信息会通过log打出，仅在pc端时才会打印。
appId: '', // 必填，公众号的唯一标识
timestamp: , // 必填，生成签名的时间戳
nonceStr: '', // 必填，生成签名的随机串
signature: '',// 必填，签名
jsApiList: [] // 必填，需要使用的JS接口列表，如需要调用分享给朋友的话我们填写为["onMenuShareTimeline"]
});

wx.ready(function(){
// config信息验证后会执行ready方法，所有接口调用都必须在config接口获得结果之后，config是一个客户端的异步操作，所以如果需要在页面加载时就调用相关接口，则须把相关接口放在ready函数中调用来确保正确执行。对于用户触发时才调用的接口，则可以直接调用，不需要放在ready函数中。
});

wx.error(function(res){
// config信息验证失败会执行error函数，如签名过期导致验证失败，具体错误信息可以打开config的debug模式查看，也可以在返回的res参数中查看，对于SPA可以在这里更新签名。
});

错误时微信会返回错误码等信息，JSON数据包示例如下（该示例为AppID无效错误）:

通过接口获取：

/// <summary>
/// 获取jsapi_ticket微信公众号调用微信JS接口的临时票据
/// </summary>
/// <param name="accessToken">微信公众号的全局唯一接口调用凭证</param>
/// <returns></returns>
public static string RequestJsapi_ticket(string accessToken)
{
string content = "";
try
{
//TODO：注意api_ticket 是用于调用微信卡券JS API的临时票据，有效期为7200 秒，通过access_token 来获取。 string url = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?access_token=" + accessToken + "&type=jsapi";
string method = "GET";
HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;
CookieContainer cookieContainer = new CookieContainer();
request.CookieContainer = cookieContainer;
request.AllowAutoRedirect = true;
request.Method = method;
request.ContentType = "text/html";
request.Headers.Add("charset", "utf-8");
//发送请求并获取响应数据
HttpWebResponse response = request.GetResponse() as HttpWebResponse;
Stream responseStream = response.GetResponseStream();
StreamReader sr = new StreamReader(responseStream, Encoding.UTF8);
//获取返回过来的结果
content = sr.ReadToEnd();
dynamic resultStr = JsonConvert.DeserializeObject(content,new { errcode="", errmsg="",ticket="", expires_in=""}.GetType()); //请求成功
if (resultStr.errcode==""&&resultStr.errmsg=="ok")
{
content=resultStr.ticket;
}
else
{
content = "";
} return content;
}
catch (Exception ex)
{
content = ex.Message;
return content;
}
}

/// <summary>
/// 随机字符串数组集合
/// </summary>
private static readonly string[] NonceStrings = new string[]
{
"a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z",
"A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z"
}; /// <summary>
/// 生成签名的随机串
/// </summary>
/// <returns></returns>
public static string CreateNonceStr()
{
Random random = new Random();
var sb = new StringBuilder();
var length = NonceStrings.Length; //生成15位数的随机字符串，当然也可以通过控制对应字符串大小生成，但是至多不超过32位
for (int i = ; i < ; i++)
{
sb.Append(NonceStrings[random.Next(length - )]);//通过random获得的随机索引到，NonceStrings数组中获取对应数组值
}
return sb.ToString();
}

/// <summary>
/// 获取当前时间戳
/// </summary>
/// <returns></returns>
public static long GetCurrentUinxTime()
{
DateTime currentDate = DateTime.Now;//当前时间
//转化为时间戳
DateTime localTime = TimeZone.CurrentTimeZone.ToLocalTime(new DateTime(, , ));
return long.Parse((currentDate - localTime).TotalSeconds.ToString().Split('.')[]);
}

//获取当前网页URL
string currentWebUrl = Request.Url.ToString();

/// <summary>
/// 获取签名
/// </summary>
/// <param name="jsapi_ticket">微信公众号调用微信JS临时票据</param>
/// <param name="nonceStr">随机串</param>
/// <param name="timestamp">时间戳</param>
/// <param name="url">当前网页URL</param>
/// <returns></returns>
public static string GetSignature(string jsapi_ticket, string nonceStr, long timestamp, string url)
{ var string1Builder = new StringBuilder();
//注意这里参数名必须全部小写，且必须有序
string1Builder.Append("jsapi_ticket=").Append(jsapi_ticket).Append("&")
.Append("noncestr=").Append(nonceStr).Append("&")
.Append("timestamp=").Append(timestamp).Append("&")
.Append("url=").Append(url.IndexOf("#") >= ? url.Substring(, url.IndexOf("#")) : url); return Sha1(string1Builder.ToString(),Encoding.UTF8);
} /// <summary>
/// 签名加密，使用SHA加密所得
/// </summary>
/// <param name="content">签名加密参数</param>
/// <param name="encode">编码UTF-8</param>
/// <returns></returns>
public static string Sha1(string content, Encoding encode)
{
try
{
SHA1 sha1 = new SHA1CryptoServiceProvider();
byte[] bytesIn = encode.GetBytes(content);
byte[] bytesOut = sha1.ComputeHash(bytesIn);
sha1.Dispose();
string result = BitConverter.ToString(bytesOut);
result = result.Replace("-", "");
return result;
}
catch (Exception ex)
{
throw new Exception("SHA1加密出错：" + ex.Message);
}
}