private string BuildRequestsign(string urlParam, EnumSignType signType)
{
string mysign = "";
if (signType == EnumSignType.MD5)
{
string preString = urlParam + AlipayConfig.ALI_KEY;
mysign = MD5Helper.Sign(preString, AlipayConfig.CHARTSET);
}
else if (signType == EnumSignType.RSA)
mysign = RSASign(urlParam, AlipayConfig.ALIPay_RSA_PRIVATEKEY, AlipayConfig.CHARTSET);
return mysign;
}