如何检测表单中GET和POST ViewModel值之间的差异?

我有一个单独的视图来处理许多类型为VoyagesViewModel的模型,在该视图中,用户可以创建新的航程或编辑所有活动航程,因此我在该视图中有相同对象类型的不同实例。

<% = Html.Hidden("Voyages["+ i +"].VoyageDetails[" + i2 + "].Id", location.Id)%>
<% = Html.TextBox("Voyages[" + i + "].VoyageDetails[" + i2 + "].ArrivalDate", location.ArrivalDate, new { @class = "dates" })%><% = Html.ValidationMessage("Voyages[" + i + "].VoyageDetails[" + i2 + "].ArrivalDate", "*")%>
<% = Html.TextBox("Voyages[" + i + "].VoyageDetails[" + i2 + "].DepartureDate", location.DepartureDate, new { @class = "dates" })%><% = Html.ValidationMessage("Voyages[" + i + "].VoyageDetails[" + i2 + "].DepartureDate", "*")%>
<% = Html.Hidden("Voyages[" + i + "].VoyageDetails[" + i2 + "].LocationID", location.LocationID)%>
<% = Html.Hidden("Voyages[" + i + "].VoyageDetails[" + i2 + "].LocationName", location.LocationName)%>
<% = Html.Hidden("Voyages[" + i + "].VoyageDetails[" + i2 + "].VesselName", location.VesselName)%>
<% = Html.Hidden("Voyages[" + i + "].VoyageDetails[" + i2 + "].VesselID", location.VesselID)%>
<% = Html.CheckBox("Voyages[" + i + "].VoyageDetails[" + i2 + "].remove", location.remove)%> (remove)

在该视图中,我有8到10个字段,当用户发布表单时(我在一个表单中有所有字段),我希望能够检测用户是否在某个航程中更改了某些内容以保存它,因此如果没有更改,我不必保存特定的航程。

 <% = Html.Hidden("Voyages[" + i + "].hash", TamperProofing.GetExpiringHMAC(new System.Web.Script.Serialization.JavaScriptSerializer().Serialize(Model), DateTime.Now.AddMinutes(15)))%>

{"Id":22,"VesselName":"CAPTAIN P (CPP)","VesselID":8,"VoyageDetails":[{"Id":58,"ArrivalDate":"\/Date(1259298000000)\/","DepartureDate":"\/Date(1259384400000)\/","LocationID":404,"LocationHash":null,"LocationName":"Balboa, Panama (PABLB)","VesselName":"CAPTAIN P (CPP)","VesselID":8,"Order":0,"Comment":null,"remove":false},{"Id":60,"ArrivalDate":"\/Date(1260248400000)\/","DepartureDate":"\/Date(1260334800000)\/","LocationID":406,"LocationHash":null,"LocationName":"Colon Free Zone, Panama (PACFZ)","VesselName":"CAPTAIN P (CPP)","VesselID":8,"Order":0,"Comment":null,"remove":false},{"Id":61,"ArrivalDate":"\/Date(1260421200000)\/","DepartureDate":"\/Date(1260507600000)\/","LocationID":407,"LocationHash":null,"LocationName":"Cristobal, Panama (PACTB)","VesselName":"CAPTAIN P (CPP)","VesselID":8,"Order":0,"Comment":null,"remove":false},{"Id":62,"ArrivalDate":null,"DepartureDate":null,"LocationID":408,"LocationHash":null,"LocationName":"Manzanillo, Panama (PAMAN)","VesselName":"CAPTAIN P (CPP)","VesselID":8,"Order":0,"Comment":null,"remove":false},{"Id":59,"ArrivalDate":null,"DepartureDate":null,"LocationID":405,"LocationHash":null,"LocationName":"Coco Solo, Panama (PACSO)","VesselName":"CAPTAIN P (CPP)","VesselID":8,"Order":0,"Comment":null,"remove":true}],"newVoyageDetail":null,"isComplete":false,"Code":"A Code","position":0,"hash":null}

因此,当用户发布表单时,我会检查是否对每次航行进行了如下更改:

 var obj = new System.Web.Script.Serialization.JavaScriptSerializer().Serialize(_voyage);
     if (TamperProofing.VerifyChanges(obj, hash) == TamperProofing.HMACChanged.True)
    {
       //UPDATE
    }else
    {
       //DO Nothing, is the exact same object
    }

再次序列化它,并将两个哈希值(隐藏的哈希值与最近计算的哈希值)进行比较,如果匹配,则表示没有任何更改。

所有的工作都很好,我只是想知道,是否有其他的选择可以做到这一点?

我的另一个关注点是序列化和所有HMAC处理这个由序列化生成的大字符串所需的时间,而不是仅仅将未更改的对象再次更新到DB所需的时间。