Ajax调用Conrtoller返回数据

function doRefund()
{

$.ajax({
type: "POST",
catch: false,
url: "@Url.Action("AliBarPay", "Alipay")",
data: {
strTradeNo: $("input[name='strTradeNo']").val(),
strAuthcode: $("input[name='strAuthcode']").val(),
strTotalAmount: $("input[name='strTotalAmount']").val()
},
dataType:'json',//返回数据类型为json类型
success: function (json) {
if (json.result) {
alert(json.msg)
} else {
alert(json.msg);
}
},
error: function (json) {
alert(json.msg);
} });

}

public ActionResult AliBarPay(string strTradeNo, string strAuthcode, string strTotalAmount)
{
AlipayTradePayContentBuilder builder = BuildPayContent(strTradeNo, strAuthcode, strTotalAmount);
string out_trade_no = builder.out_trade_no; AlipayF2FPayResult payResult = serviceClient.tradePay(builder); bool bResult = false;
switch (payResult.Status)
{
case ResultEnum.SUCCESS:
DoSuccessProcess(payResult);
bResult = true;
strResult = "支付成功!";
break;
case ResultEnum.FAILED:
DoFailedProcess(payResult);
break;
case ResultEnum.UNKNOWN:
strResult = "网络异常，请检查网络配置后，更换外部订单号重试";
break;
}
var vJson = new { result = bResult, msg = strResult };
return Json(vJson);//返回json类型
}

$.ajax({
type: "POST",
url: "/Alipay/AlipayRefund",
data: {
strTradeNo: $("input[name='strTradeNo3']").val(),
strProductId: $("input[name='strProductId']").val(),
strRefoundAmount: $("input[name='strRefundAmount']").val(),
},
dataType: "text",//返回类型为string的
success: function (result) {
if (result == "" || result == null)
{
alert("无返回值");
return;
}
$("#refundDetail").html(result);
alert(result);
}
});

public ActionResult AlipayRefund(string strTradeNo,string strProductId,string strRefoundAmount)
{
AlipayTradeRefundContentBuilder builder = BuildRefundContent(strTradeNo, strProductId, strRefoundAmount); AlipayF2FRefundResult refundResult = serviceClient.tradeRefund(builder); switch (refundResult.Status)
{
case ResultEnum.SUCCESS:
strResult = DoRefundSuccessProcess(refundResult);
break;
case ResultEnum.FAILED:
strResult = DoRefundFailedProcess(refundResult);
break;
case ResultEnum.UNKNOWN:
if (refundResult.response == null)
{
strResult = "配置或网络异常，请检查";
}
else
{
strResult = "系统异常，请走人工退款流程";
}
break;
} return Content(strResult);//返回string类型 }

<div>
<span>支付宝退费</span>
<form>
<span>商户订单号：</span><input type="text" name="strTradeNo3" />
<span>支付宝订单号：</span><input type="text" name="strProductId" />
<span>总金额金额：</span><input type="text" name="strRefundAmount" />
<button id="doSubmit4" type="button" onclick="doRefund()">退费提交</button>//type='button' 必须写,不然在方法中执行没得返回值,但chrom中调试可以显示,不调试时,就是显示不出来!!!
</form>
<span id="refundDetail"></span>
</div>