private string Token = "gacl";

public string wxGet(string signature, string timestamp, string nonce, string echostr)

{

//return echostr;

if (Check(signature, timestamp, nonce, Token))

{

return (echostr);//返回随机字符串则表示验证通过

}

else

{

return ("failed:" + signature + "," + GetSignature(timestamp, nonce, Token) + "。如果你在浏览器中看到这句话，说明此地址可以被作为微信公众账号后台的Url，请注意保持Token一致。");

}

}///<summary>///检查签名是否正确///</summary>///<param name="signature"></param>///<param name="timestamp"></param>///<param name="nonce"></param>///<param name="token"></param>///<returns></returns>publicboolCheck(stringsignature,stringtimestamp,stringnonce,stringtoken =null){returnsignature == GetSignature(timestamp, nonce, token); }publicstringGetSignature(stringtimestamp,stringnonce,stringtoken =null){ token = token ?? Token;vararr =new[] { token, timestamp, nonce }.OrderBy(z => z).ToArray();vararrString =string.Join("", arr);//var enText = FormsAuthentication.HashPasswordForStoringInConfigFile(arrString, "SHA1");//使用System.Web.Security程序集varsha1 = System.Security.Cryptography.SHA1.Create();varsha1Arr = sha1.ComputeHash(Encoding.UTF8.GetBytes(arrString)); System.Text.StringBuilder enText =newStringBuilder();foreach(varbinsha1Arr) { enText.AppendFormat("{0:x2}", b); }returnenText.ToString(); }