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copied!<p>using this constructor:</p> <pre><code>public DataContractJsonSerializer(Type type, IEnumerable<Type> knownTypes, int maxItemsInObjectGraph, bool ignoreExtensionDataObject, IDataContractSurrogate dataContractSurrogate, bool alwaysEmitTypeInformation) </code></pre> <p>example code:</p> <pre><code>DataContractJsonSerializer serializer = new DataContractJsonSerializer(o.GetType(), null, int.MaxValue, false, new DateTimeSurrogate(), false); public class DateTimeSurrogate : IDataContractSurrogate { #region IDataContractSurrogate 成员 public object GetCustomDataToExport(Type clrType, Type dataContractType) { return null; } public object GetCustomDataToExport(System.Reflection.MemberInfo memberInfo, Type dataContractType) { return null; } public Type GetDataContractType(Type type) { return type; } public object GetDeserializedObject(object obj, Type targetType) { return obj; } public void GetKnownCustomDataTypes(System.Collections.ObjectModel.Collection<Type> customDataTypes) { } public object GetObjectToSerialize(object obj, Type targetType) { if (obj.GetType() == typeof(DateTime)) { DateTime dt = (DateTime)obj; if (dt == DateTime.MinValue) { dt = DateTime.MinValue.ToUniversalTime(); return dt; } return dt; } if (obj == null) { return null; } var q = from p in obj.GetType().GetProperties() where (p.PropertyType == typeof(DateTime)) && (DateTime)p.GetValue(obj, null) == DateTime.MinValue select p; q.ToList().ForEach(p => { p.SetValue(obj, DateTime.MinValue.ToUniversalTime(), null); }); return obj; } public Type GetReferencedTypeOnImport(string typeName, string typeNamespace, object customData) { return null; } public System.CodeDom.CodeTypeDeclaration ProcessImportedType(System.CodeDom.CodeTypeDeclaration typeDeclaration, System.CodeDom.CodeCompileUnit compileUnit) { return typeDeclaration; } #endregion } </code></pre>

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