代码部分:
微信支付只能用test,其余都报签名错误,签名加密方式用的HMAC-SHA256,网上有人说把body字符设置为UTF-8,原因是对的,不过官方的最新代码里面,md5模式默认是UTF-8,我改成MD5依然不对,可能是还有其他地方没有改过来,后面发现CalcHMACSHA256Hash方法里的Encoding编码写的是default,改成utf-8。
/**
* 调用统一下单,获得下单结果
* @return 统一下单结果
* @失败时抛异常WxPayException
*/
public WxPayData GetUnifiedOrderResult()
{
//统一下单
WxPayData data = new WxPayData();
data.SetValue("body", "商品名称"); //test test test 正确,其他的都错误
data.SetValue("attach", "微信支付");
data.SetValue("out_trade_no", WxPayApi.GenerateOutTradeNo());
data.SetValue("total_fee", total_fee);
data.SetValue("time_start", DateTime.Now.ToString("yyyyMMddHHmmss"));
data.SetValue("time_expire", DateTime.Now.AddMinutes(10).ToString("yyyyMMddHHmmss"));
data.SetValue("goods_tag", "test");
data.SetValue("trade_type", "JSAPI");
data.SetValue("openid", openid);
WxPayData result = WxPayApi.UnifiedOrder(data);
if (!result.IsSet("appid") || !result.IsSet("prepay_id") || result.GetValue("prepay_id").ToString() == "")
{
Log.Error(this.GetType().ToString(), "UnifiedOrder response error!");
throw new WxPayException("UnifiedOrder response error!");
}
unifiedOrderResult = result;
return result;
}
修改的方法:
private string CalcHMACSHA256Hash(string plaintext, string salt)
{
string result = "";
var enc = Encoding.UTF8; // Default 默认 修改成utf-8
byte[]
baText2BeHashed = enc.GetBytes(plaintext),
baSalt = enc.GetBytes(salt);
System.Security.Cryptography.HMACSHA256 hasher = new HMACSHA256(baSalt);
byte[] baHashedText = hasher.ComputeHash(baText2BeHashed);
result = string.Join("", baHashedText.ToList().Select(b => b.ToString("x2")).ToArray());
return result;
}