C#json Serialization and deserialization

1, dynamic determine whether the data to be serialized

My needs are like this, I used a database of components called Dos.orm, it is really convenient, but in use, I found a problem, such as my definition of the table has a field to add time, modify the time, these are the default, when added, do not need to assign value, but I passed from the front, it will be a datetime.minvalue. I don't want to change it. But when I query the fields from the database, I want to get the data. Therefore, it is not possible to simply add a serialized property to the model.

Here's my Jsonhelper class.

usingHelp.DataService.Business.Common;usingNewtonsoft.json;usingSystem;usingSystem.Collections.Generic;usingSystem.Linq;usingSystem.Text;usingSystem.Threading.Tasks;namespacehelp.dataservice.business{ Public Static classJsonhelper { Public Static stringSerializeObject (Objectparam) {            if(param! =NULL)            {                returnjsonconvert.serializeobject (param); }            return string.        Empty; }         Public StaticT deserializeobject<t> (stringJsonwhereT:class        {            if(!string. IsNullOrEmpty (JSON)) {returnJsonconvert.deserializeobject<t>(JSON); }            return default(T); }         Public StaticRESULT Parsemodel<input, result>(INPUT data)whereINPUT:class            whereRESULT:class        {            if(Data = =NULL)            {                return NULL; }            varJsetting =Newjsonserializersettings {nullvaluehandling =Nullvaluehandling.ignore}; string[] Props = {"Modifytime", "Addtime"  }; Jsetting.contractresolver=NewLimitpropscontractresolver (Props,false); stringJSON =jsonconvert.serializeobject (data, jsetting); if(!string. IsNullOrEmpty (JSON)) {//null and default, there is no need to deserialize, dos.orm component if DateTime is 0001-01-01, operation database will not succeed                returnJsonconvert.deserializeobject<result>(JSON, jsetting); }            return default(RESULT); }         Public StaticR Parseviewmodel<i, r>(I data)whereI:class            whereR:class        {            stringJSON =serializeobject (data); returnDeserializeobject<r>(JSON); }    }}

The code for the Limitpropscontractresolver class is as follows:

usingNewtonsoft.Json.Serialization;usingSystem;usingSystem.Collections.Generic;usingSystem.Linq;usingSystem.Text;usingSystem.Threading.Tasks;namespacehelp.dataservice.business.common{/// <summary>    ///dynamically determines whether a property is serialized/// </summary>     Public classLimitpropscontractresolver:defaultcontractresolver {/// <summary>        ///Property List/// </summary>        Private string[] props =NULL; /// <summary>        ///whether it contains/// </summary>        Private BOOLretain; /// <summary>        ///constructor Function/// </summary>        /// <param name= "props" >Props</param>        /// <param name= "Isretain" >Isretain (included or excluded)</param>         PublicLimitpropscontractresolver (string[] Props,BOOLIsretain =true)        {             This. props =props;  This. retain =Isretain; }        protected OverrideIlist<jsonproperty>createproperties (Type type, Newtonsoft.Json.MemberSerialization memberserialization) {IList<JsonProperty> list =Base.            Createproperties (type, memberserialization); if(Props = =NULL|| Props. Length = =0)            {                returnlist; }            //List only properties that are reserved            varret = list. Where (p =            {                if(retain) {return  This. Props.                Contains (P.propertyname); }                Else                {                    return! This. Props.                Contains (P.propertyname); }            }).            ToList (); returnret; }    }}

2. Use C # to tune Java services.

The result of the error is that the data is not found, do not know, later debugging Java code Discovery, but also the problem of deserialization. Because the code in C # is capitalized in the first letter, the Java code is the first lowercase letter, so that after deserialization, Java does not get any parameters at all, although C # has passed. Without changing the Java code, I can only change the C # code. Fortunately there are ready-made methods, but not very common, as follows:

Newnew= cal; string json = Jsonconvert.serializeobject (VO, setting);

3. Related Information

Newtonsoft.json Advanced Usage

C#json Serialization and deserialization