微信开发.Net 接入示例

<%@ Page Language="C#"  %>
<script runat="Server" >
//此处TOKEN可以自行修改
public const String TOKEN = "weixin_kevinlc";

private void Page_Load(object sender, EventArgs e)
{
String echoStr = Request["echostr"];

if(this.checkSignature()){
Response.Write(echoStr);
}
}
//验证
private bool checkSignature(){
string signature = Request["signature"];
string timestamp = Request["timestamp"];
string nonce = Request["nonce"];

string token = TOKEN;
string[] tmpArr = new string[]{token, timestamp, nonce};
Array.Sort(tmpArr);
string tmpStr = string.Join("",tmpArr);
//sha1加密
System.Security.Cryptography.SHA1 sha1 = new System.Security.Cryptography.SHA1CryptoServiceProvider();
byte[] secArr = sha1.ComputeHash(System.Text.Encoding.Default.GetBytes(tmpStr));
tmpStr =  BitConverter.ToString(secArr).Replace("-","").ToLower();
if( tmpStr == signature ){
return true;
}else{
return false;
}
}
</script>