{"id":1028,"date":"2010-04-20T22:45:18","date_gmt":"2010-04-20T21:45:18","guid":{"rendered":"http:\/\/soci.hu\/blog\/?p=1028"},"modified":"2010-04-20T22:45:18","modified_gmt":"2010-04-20T21:45:18","slug":"entity-framework-4-tobbretegu-appokban","status":"publish","type":"post","link":"https:\/\/soci.hu\/blog\/index.php\/2010\/04\/20\/entity-framework-4-tobbretegu-appokban\/","title":{"rendered":"Entity Framework 4 t\u00f6bbr\u00e9teg\u0171 appokban"},"content":{"rendered":"

J\u00e1tszottam kicsit az EF4-gyel. Az al\u00e1bbi k\u00f3d egy n r\u00e9teg\u0171 app adatmozg\u00e1s\u00e1t szimul\u00e1lja a WCF xml szerializ\u00e1l\u00f3j\u00e1t haszn\u00e1lva. Mindh\u00e1rom template-tel kipr\u00f3b\u00e1ltam, al\u00e1bb l\u00e1that\u00f3ak az adatmozg\u00e1sok.
\nA tesztk\u00f3d messze nem korrekt, de kiindul\u00f3pontk\u00e9nt tov\u00e1bbi vizsg\u00e1latokhoz elfogathat\u00f3:<\/p>\n

using System;
\nusing System.IO;
\nusing System.Linq;
\nusing System.Runtime.Serialization;<\/p>\n

namespace POCO1
\n{
\n class Program
\n {
\n static void Main()
\n {
\n Department d;
\n using (var e = new SchoolEntities())
\n {
\n e.ContextOptions.ProxyCreationEnabled = false;
\n e.ContextOptions.LazyLoadingEnabled = false;
\n d = e.Departments.Include(“Courses”).Single(dep => dep.DepartmentID == 1);
\n Console.WriteLine(“{0}”, d.Name);
\n Console.WriteLine(“———————“);
\n foreach (Course c in d.Courses)
\n {
\n Console.WriteLine(“{0}”, c.Title);
\n }
\n e.Detach(d);
\n }<\/p>\n

var ser = new DataContractSerializer(d.GetType());
\n \/\/var ser = new DataContractSerializer(d.GetType(),
\n \/\/null, 50000, true, true, null, new ProxyDataContractResolver());<\/p>\n

using (var s2c = new FileStream(@”c:\\temp\\Server2Client.xml”, FileMode.Create, FileAccess.ReadWrite))
\n {
\n \/\/1. Server k\u00fcld kliensre
\n ser.WriteObject(s2c, d);
\n s2c.Position = 0;
\n \/\/2. Kliens deserializ\u00e1l
\n var clientSideDep = (Department)ser.ReadObject(s2c);<\/p>\n

\/\/Csak ST
\n \/\/bool ce = clientSideDep.ChangeTracker.ChangeTrackingEnabled;<\/p>\n

\/\/3. Kliens m\u00f3dos\u00edt
\n clientSideDep.Name += “a”;<\/p>\n

using (var c2s = new FileStream(@”c:\\temp\\Client2Server.xml”, FileMode.Create, FileAccess.ReadWrite))
\n {
\n \/\/4. Kliens visszak\u00fcld
\n ser.WriteObject(c2s, clientSideDep);
\n c2s.Position = 0;<\/p>\n

\/\/5.Server deserializ\u00e1l
\n var sentBackDepartment = (Department)ser.ReadObject(c2s);
\n using (var e = new SchoolEntities())
\n {
\n \/\/6. Server visszam\u00f3dos\u00edt<\/p>\n

\/\/Norm\u00e1l entit\u00e1s
\n e.Departments.Attach(sentBackDepartment);
\n e.ObjectStateManager.GetObjectStateEntry(sentBackDepartment).SetModified();
\n e.ObjectStateManager.GetObjectStateEntry(sentBackDepartment).SetModifiedProperty(“Name”);<\/p>\n

\/\/POCO
\n \/\/e.Departments.Include(“Courses”).Single(dep => dep.DepartmentID == 1);
\n \/\/e.Departments.ApplyCurrentValues(sentBackDepartment);<\/p>\n

\/\/Self-tracking entity
\n \/\/e.Departments.ApplyChanges(sentBackDepartment);<\/p>\n

e.SaveChanges();
\n }
\n }
\n }
\n }
\n }
\n}<\/p>\n

EF alapobjektumok szerviz => kliens:<\/p>\n

\r\n<Department z:Id="i1" xmlns="http:\/\/schemas.datacontract.org\/2004\/07\/POCO1" xmlns:i="http:\/\/www.w3.org\/2001\/XMLSchema-instance" xmlns:z="http:\/\/schemas.microsoft.com\/2003\/10\/Serialization\/">\r\n  <EntityKey z:Id="i2" xmlns="http:\/\/schemas.datacontract.org\/2004\/07\/System.Data.Objects.DataClasses" xmlns:a="http:\/\/schemas.datacontract.org\/2004\/07\/System.Data">\r\n    <a:EntityContainerName>SchoolEntities<\/a:EntityContainerName>\r\n    <a:EntityKeyValues>\r\n      <a:EntityKeyMember>\r\n        <a:Key>DepartmentID<\/a:Key>\r\n        <a:Value i:type="b:int" xmlns:b="http:\/\/www.w3.org\/2001\/XMLSchema">1<\/a:Value>\r\n      <\/a:EntityKeyMember>\r\n    <\/a:EntityKeyValues>\r\n    <a:EntitySetName>Departments<\/a:EntitySetName>\r\n  <\/EntityKey>\r\n  <Administrator>2<\/Administrator>\r\n  <Budget>350000.0000<\/Budget>\r\n  <Courses\/>\r\n  <DepartmentID>1<\/DepartmentID>\r\n  <Name>Engineering<\/Name>\r\n  <StartDate>2007-09-01T00:00:00<\/StartDate>\r\n<\/Department>\r\n<\/pre>\n
EF alapobjektumok kliens => szerviz:<\/p>\n
\r\n<Department z:Id="i1" xmlns="http:\/\/schemas.datacontract.org\/2004\/07\/POCO1" xmlns:i="http:\/\/www.w3.org\/2001\/XMLSchema-instance" xmlns:z="http:\/\/schemas.microsoft.com\/2003\/10\/Serialization\/">\r\n  <EntityKey z:Id="i2" xmlns="http:\/\/schemas.datacontract.org\/2004\/07\/System.Data.Objects.DataClasses" xmlns:a="http:\/\/schemas.datacontract.org\/2004\/07\/System.Data">\r\n    <a:EntityContainerName>SchoolEntities<\/a:EntityContainerName>\r\n    <a:EntityKeyValues>\r\n      <a:EntityKeyMember>\r\n        <a:Key>DepartmentID<\/a:Key>\r\n        <a:Value i:type="b:int" xmlns:b="http:\/\/www.w3.org\/2001\/XMLSchema">1<\/a:Value>\r\n      <\/a:EntityKeyMember>\r\n    <\/a:EntityKeyValues>\r\n    <a:EntitySetName>Departments<\/a:EntitySetName>\r\n  <\/EntityKey>\r\n  <Administrator>2<\/Administrator>\r\n  <Budget>350000.0000<\/Budget>\r\n  <Courses\/>\r\n  <DepartmentID>1<\/DepartmentID>\r\n  <Name>Engineeringa<\/Name>\r\n  <StartDate>2007-09-01T00:00:00<\/StartDate>\r\n<\/Department>\r\n<\/pre>\n
POCO szerviz => kliens:<\/p>\n
\r\n<Department xmlns="http:\/\/schemas.datacontract.org\/2004\/07\/POCO1" xmlns:i="http:\/\/www.w3.org\/2001\/XMLSchema-instance">\r\n  <Administrator>2<\/Administrator>\r\n  <Budget>350000.0000<\/Budget>\r\n  <Courses\/>\r\n  <DepartmentID>1<\/DepartmentID>\r\n  <Name>Engineeringa<\/Name>\r\n  <StartDate>2007-09-01T00:00:00<\/StartDate>\r\n<\/Department>\r\n<\/pre>\n
POCO kliens => szerviz:<\/p>\n

\n  2<\/Administrator>
\n  350000.0000<\/Budget>
\n  
\n  1<\/DepartmentID>
\n  Engineeringaa<\/Name>
\n  2007-09-01T00:00:00<\/StartDate>
\n<\/Department><\/p>\n
Self-tracking entity, szerviz => kliens:<\/p>\n
\r\n<Department z:Id="i1" xmlns="http:\/\/schemas.datacontract.org\/2004\/07\/POCO1" xmlns:i="http:\/\/www.w3.org\/2001\/XMLSchema-instance" xmlns:z="http:\/\/schemas.microsoft.com\/2003\/10\/Serialization\/">\r\n  <Administrator>2<\/Administrator>\r\n  <Budget>350000.0000<\/Budget>\r\n  <ChangeTracker z:Id="i2">\r\n    <ExtendedProperties\/>\r\n    <ObjectsAddedToCollectionProperties\/>\r\n    <ObjectsRemovedFromCollectionProperties\/>\r\n    <OriginalValues\/>\r\n    <State>Unchanged<\/State>\r\n  <\/ChangeTracker>\r\n  <Courses\/>\r\n  <DepartmentID>1<\/DepartmentID>\r\n  <Name>Engineeringaaaaaaaa<\/Name>\r\n  <StartDate>2007-09-01T00:00:00<\/StartDate>\r\n<\/Department>\r\n<\/pre>\n
Self-tracking entity, kliens => szerviz:<\/p>\n
\r\n<Department z:Id="i1" xmlns="http:\/\/schemas.datacontract.org\/2004\/07\/POCO1" xmlns:i="http:\/\/www.w3.org\/2001\/XMLSchema-instance" xmlns:z="http:\/\/schemas.microsoft.com\/2003\/10\/Serialization\/">\r\n  <Administrator>2<\/Administrator>\r\n  <Budget>350000.0000<\/Budget>\r\n  <ChangeTracker z:Id="i2">\r\n    <ExtendedProperties\/>\r\n    <ObjectsAddedToCollectionProperties\/>\r\n    <ObjectsRemovedFromCollectionProperties\/>\r\n    <OriginalValues\/>\r\n    <State>Modified<\/State>\r\n  <\/ChangeTracker>\r\n  <Courses\/>\r\n  <DepartmentID>1<\/DepartmentID>\r\n  <Name>Engineeringaaaaaaaaa<\/Name>\r\n  <StartDate>2007-09-01T00:00:00<\/StartDate>\r\n<\/Department>\r\n<\/pre>\n
\u00c9rdekes, hogy a m\u00f3dos\u00edt\u00e1s t\u00e9nye csak a ST-ben l\u00e1tszik, m\u00e9g az eredeti entity-sben sem. A POCO-t\u00f3l nem is v\u00e1rtuk persze.
\nK\u00e9s\u0151bb m\u00e9g majd foglalkozok b\u0151vebben a t\u00e9m\u00e1val. Aki j\u00e1tszani akar vele, hozza l\u00e9tre a School EF p\u00e9ldaadatb\u00e1zist, azon lehet futtatni.<\/p>\n","protected":false},"excerpt":{"rendered":"
J\u00e1tszottam kicsit az EF4-gyel. Az al\u00e1bbi k\u00f3d egy n r\u00e9teg\u0171 app adatmozg\u00e1s\u00e1t szimul\u00e1lja a WCF xml szerializ\u00e1l\u00f3j\u00e1t haszn\u00e1lva. Mindh\u00e1rom template-tel kipr\u00f3b\u00e1ltam, al\u00e1bb…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8,75,25,6,74,4],"tags":[],"class_list":["post-1028","post","type-post","status-publish","format-standard","hentry","category-net","category-net-4","category-adonet","category-adatbazisok","category-entity-framework","category-szakmai-elet"],"_links":{"self":[{"href":"https:\/\/soci.hu\/blog\/index.php\/wp-json\/wp\/v2\/posts\/1028","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/soci.hu\/blog\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/soci.hu\/blog\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/soci.hu\/blog\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/soci.hu\/blog\/index.php\/wp-json\/wp\/v2\/comments?post=1028"}],"version-history":[{"count":3,"href":"https:\/\/soci.hu\/blog\/index.php\/wp-json\/wp\/v2\/posts\/1028\/revisions"}],"predecessor-version":[{"id":1031,"href":"https:\/\/soci.hu\/blog\/index.php\/wp-json\/wp\/v2\/posts\/1028\/revisions\/1031"}],"wp:attachment":[{"href":"https:\/\/soci.hu\/blog\/index.php\/wp-json\/wp\/v2\/media?parent=1028"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/soci.hu\/blog\/index.php\/wp-json\/wp\/v2\/categories?post=1028"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/soci.hu\/blog\/index.php\/wp-json\/wp\/v2\/tags?post=1028"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}