标签：frame desc loaddata ges asc 运算 rss rowspan esc
关于ADO.NET Entity Framework部分的内容见ADO.NET Entity Framework(1-4)
http://www.cnblogs.com/foundation/archive/2008/10/06/1304718.html
本文例子下载: http://files.cnblogs.com/wxwinter/lz.rar
目录
4 Silverlight客启访问DataService 18
1.ADO.NET Data Service的DataServiceHost是一个WCF Service,由System.Data.Services.DataService<T>提供来自NET3.5 SP1 类库中的System.Data.Services.dll
2.DataServices会自动为加载的Entity对象生成具有增查删改功能的WCF服务
3.DataServices是以Http方式与客户端进行通信.任何可以实现HTTP访问的客户端,都可以与DataServices交互
4. NET3.5 SP1的客户端可以使用System.Data.Services.Client.DataServiceContext与DataServices交互,该类来自NET3.5 SP1 类库中的System.Data.Services.Client.dll 文件
5. Silverlight 2.0客户端可以使用System.Data.Services.Client.DataServiceContext与DataServices交互,该类来自Silverlight 2.0 类库中的System.Data.Services.Client 文件
6.DataServices提供ATOM与JSON两种格式用来描述数据结构,说明如下:
|
ATOM |
与RSS类似，也是建立在XML数据格式的基础之上的 Atom相对RSS格式而言，进行了扩展，提供了比RSS更多的项目属性 |
|
JSON |
格式如下 { "name": "wxd", "time": "2008/10/10 10:10", "value": 123.456, "list": [ "wxwinter", "lzm"] } |
tabA
tabX
|
public class myWebDataService : DataService<myDBEntities> { public static void InitializeService(IDataServiceConfiguration config) { config.SetEntitySetAccessRule("*", EntitySetRights.All); // * :表示全部实体集 // EntitySetRights.All : 表示全部的操作权限 } } |
|
|
|
//查询 private void button1_Click(object sender, EventArgs e) { Uri url = new Uri("http://localhost:1468/myWebDataService.svc"); myService.myDBEntities server = new WinFormClient.myService.myDBEntities(url);
foreach (var v in server.tabA) {
Console.WriteLine("{0},{1},{2}", v.a, v.b, v.c); } //- foreach (var v in server.tabX.Where(p=>p.x=="002")) {
Console.WriteLine("{0},{1},{2}", v.x, v.y, v.z); }
}
lzm ,2 ,5 wxd ,1 ,4 wxwinter ,3 ,6 002 ,8 ,llzzmm |
|
//添加 private void button2_Click(object sender, EventArgs e) { Uri url = new Uri("http://localhost:1468/myWebDataService.svc"); myService.myDBEntities server = new WinFormClient.myService.myDBEntities(url);
server.AddTotabA(new myService.tabA() { a = "wxdlzm", b = "333", c = "xxx" });
server.SaveChanges(); }
|
|
//修改 private void button3_Click(object sender, EventArgs e) { Uri url = new Uri("http://localhost:1468/myWebDataService.svc"); myService.myDBEntities server = new WinFormClient.myService.myDBEntities(url); var v = server.tabA.Where(p => p.a == "wxdlzm").First(); v.b = "hello"; server.UpdateObject(v); server.SaveChanges(); }
|
|
//删除 private void button4_Click(object sender, EventArgs e) { Uri url = new Uri("http://localhost:1468/myWebDataService.svc"); myService.myDBEntities server = new WinFormClient.myService.myDBEntities(url); var v = server.tabA.Where(p => p.a == "wxdlzm").First(); server.DeleteObject(v); server.SaveChanges(); }
|
|
//异步查询
myService.myDBEntities server1;
//开始查询 private void button5_Click(object sender, EventArgs e) { Uri url = new Uri("http://localhost:1468/myWebDataService.svc"); Uri urlE = new Uri("http://localhost:1468/myWebDataService.svc/tabX"); server1 = new WinFormClient.myService.myDBEntities(url);
server1.BeginExecute<myService.tabX>(urlE, new AsyncCallback(executed), null); } //返回结果 void executed(IAsyncResult obj) { var tp = server1.EndExecute<myService.tabX>(obj);
foreach (var v in tp) { Console.WriteLine("{0},{1},{2}", v.x, v.y, v.z); }
} |
Silverlight 2.0 可以利用两种方法与DataServices交互：
Silverlight 2.0 是使用异步方法来连接远程数据源。
LINQ 的 select ，要用 BeginExecute() 和 EndExecute()
LINQ 的 SaveChanges()，要用 BeginSaveChanges() 和 EndSaveChanges()
|
<StackPanel Loaded="StackPanel_Loaded"> <data:DataGrid Name="dg"></data:DataGrid> <Button Content="DataServiceContext方式加载数据" Width="200" Click="loadData_Click" /> <Button Content="WebClient方式加载数据" Width="200" Click="loadData2_Click" /> <Button Content="添加" Width="200" Click="add_Click" /> <Button Content="修改" Width="200" Click="edit_Click" /> <Button Content="删除" Width="200" Click="del_Click" /> </StackPanel> |
|
myService.myDBEntities server; private void StackPanel_Loaded(object sender, RoutedEventArgs e) { Uri url = new Uri("http://localhost:1468/myWebDataService.svc"); server = new myService.myDBEntities(url); } void saveChanges_completed(IAsyncResult obj) {
} |
|
//WebClient方式加载数据 private void loadData2_Click(object sender, RoutedEventArgs e) { Uri uri = new Uri("http://localhost:1468/myWebDataService.svc/tabA"); WebClient client = new WebClient(); client.OpenReadCompleted += new OpenReadCompletedEventHandler(client_completed); client.OpenReadAsync(uri); }
void client_completed(object sender, OpenReadCompletedEventArgs e) { if (e.Error == null) { XmlReader reader = XmlReader.Create(e.Result); XDocument ls = XDocument.Load(reader); XNamespace xmlns = "http://www.w3.org/2005/Atom"; XNamespace d = "http://schemas.microsoft.com/ado/2007/08/dataservices"; XNamespace m = "http://schemas.microsoft.com/ado/2007/08/dataservices/metadata";
var list = from x in ls.Descendants(xmlns + "entry") select new myService.tabA { a= x.Descendants(d + "a").First().Value, b = x.Descendants(d + "b").First().Value, c = x.Descendants(d + "c").First().Value }; dg.ItemsSource = list; } } |
|
|
|
//加载 private void loadData_Click(object sender, RoutedEventArgs e) { Uri urlE = new Uri("http://localhost:1468/myWebDataService.svc/tabX"); server.BeginExecute<myService.tabX>(urlE, new AsyncCallback(load_completed), null); }
void load_completed(IAsyncResult obj) { var tp = server.EndExecute<myService.tabX>(obj); this.dg.ItemsSource = tp.ToList(); } |
|
|
|
//添加 private void add_Click(object sender, RoutedEventArgs e) { server.AddTotabX(new myService.tabX() { x="007",z="sss",y="sss" }); server.BeginSaveChanges(new AsyncCallback(saveChanges_completed), null); } |
|
|
|
//编辑 private void edit_Click(object sender, RoutedEventArgs e) { Uri urlE = new Uri("http://localhost:1468/myWebDataService.svc/tabX"); server.BeginExecute<myService.tabX>(urlE, new AsyncCallback(begin_edit), null); } void begin_edit(IAsyncResult obj) { var tp = server.EndExecute<myService.tabX>(obj).Where(p => p.x == "007 ").First(); tp.y = "hello"; server.UpdateObject(tp); server.BeginSaveChanges(new AsyncCallback(saveChanges_completed), null); } |
|
|
|
//删除 private void del_Click(object sender, RoutedEventArgs e) { Uri urlE = new Uri("http://localhost:1468/myWebDataService.svc/tabX"); server.BeginExecute<myService.tabX>(urlE, new AsyncCallback(begin_del), null); }
void begin_del(IAsyncResult obj) { var tp = server.EndExecute<myService.tabX>(obj).Where(p => p.x == "007 ").First(); server.DeleteObject(tp); server.BeginSaveChanges(new AsyncCallback(saveChanges_completed), null);
} |
|
|
DataService 支持URL方式访问
|
格式 |
http://[Url]/[ServiceName]/[EntityName]/[NavigationOptions]?[QueryOptions] |
|
Url: 数据服务所在的网址 ServiceName: 数据服务的名称 EntityName: Entity 名称或是 Service 方法名称 NavigationOptions: 查询 Entity 中关联的设定 QueryOptions: 查询的选项 |
|
运算符 |
说明 |
|
and |
|
|
or |
|
|
not |
|
|
eq |
= |
|
ne |
!= |
|
lt |
< |
|
gt |
> |
|
le |
<= |
|
ge |
>= |
|
add |
+ |
|
sub |
- |
|
mul |
* |
|
div |
/ |
|
mod |
余数 |
|
() |
|
expand |
类似于LINQ中的LoadOptions，以此来指定加载此对象相关的通过expand指定的对象。如果需要加载多个对象，用逗号分隔。 |
|
orderby |
指定排序方式。语法为：$orderby=Field [ASC|DESC], [Field[ASC|DESC]] |
|
Skip Top |
类似于LINQ中的Skip(PageSize * PageIndex).Take(PageSize)用来实现分页。 |
|
Filter |
通过filter这个参数可以在URL里传递过滤条件。 |
|
bool substringof(string p0, string p1) |
|
|
bool startswith(string p0, string p1) |
|
|
int indexof(string arg) |
|
|
string remove(string p0, int pos) |
|
|
string remove(string p0, string find, string replace) |
|
|
string substring(string p0, int pos, int length) |
|
|
string toupper(string p0) |
|
|
string concat(string p0, string p1) |
|
|
bool endswith(string p0, string p1) |
|
|
int length(string p0) |
|
|
string insert(string p0,int pos, string p1) |
|
|
string remove(string p0, int pos, int length) |
|
|
string substring(string p0, int pos) |
|
|
string tolower(string p0) |
|
|
string trim(string p0) |
|
|
int day(DateTime) |
|
|
int month(DateTime) |
|
|
int hour(DateTime) |
|
|
int second(DateTime) |
|
|
int minute(DateTime) |
|
|
int year(DateTime) |
|
|
double round(double) |
|
|
decimal floor(decimal) |
|
|
decimal round(decimal) |
|
|
double ceiling(double) |
|
|
double floor(double) |
|
|
decimal ceiling(decimal) |
|
http://localhost:1468/myWebDataService.svc/tabA |
|
由于返回的数据是ATOM格式的,如果浏览器支持该格式,会用阅读方式打开,如IE7用RSS阅读器方式打开 以下是返回的数据 |
|
<?xml version="1.0" encoding="utf-8" standalone="yes"?> <feed xml:base="http://localhost:1468/myWebDataService.svc/" xmlns:d="http://schemas.microsoft.com/ado/2007/08/dataservices" xmlns:m="http://schemas.microsoft.com/ado/2007/08/dataservices/metadata" xmlns="http://www.w3.org/2005/Atom"> <title type="text">tabA</title> <id>http://localhost:1468/myWebDataService.svc/tabA</id> <updated>2008-11-17T11:14:32Z</updated> <link rel="self" title="tabA" href="tabA" /> <entry> <id>http://localhost:1468/myWebDataService.svc/tabA(‘lzm%20%20%20%20%20%20%20‘)</id> <title type="text"></title> <updated>2008-11-17T11:14:32Z</updated> <author> <name /> </author> <link rel="edit" title="tabA" href="tabA(‘lzm%20%20%20%20%20%20%20‘)" /> <category term="myDBModel.tabA" scheme="http://schemas.microsoft.com/ado/2007/08/dataservices/scheme" /> <content type="application/xml"> <m:properties> <d:a xml:space="preserve">lzm </d:a> <d:b xml:space="preserve">2 </d:b> <d:c xml:space="preserve">5 </d:c> </m:properties> </content> </entry> <entry> <id>http://localhost:1468/myWebDataService.svc/tabA(‘wxd%20%20%20%20%20%20%20‘)</id> <title type="text"></title> <updated>2008-11-17T11:14:32Z</updated> <author> <name /> </author> <link rel="edit" title="tabA" href="tabA(‘wxd%20%20%20%20%20%20%20‘)" /> <category term="myDBModel.tabA" scheme="http://schemas.microsoft.com/ado/2007/08/dataservices/scheme" /> <content type="application/xml"> <m:properties> <d:a xml:space="preserve">wxd </d:a> <d:b xml:space="preserve">1 </d:b> <d:c xml:space="preserve">4 </d:c> </m:properties> </content> </entry> <entry> <id>http://localhost:1468/myWebDataService.svc/tabA(‘wxdlzm%20%20%20%20‘)</id> <title type="text"></title> <updated>2008-11-17T11:14:32Z</updated> <author> <name /> </author> <link rel="edit" title="tabA" href="tabA(‘wxdlzm%20%20%20%20‘)" /> <category term="myDBModel.tabA" scheme="http://schemas.microsoft.com/ado/2007/08/dataservices/scheme" /> <content type="application/xml"> <m:properties> <d:a xml:space="preserve">wxdlzm </d:a> <d:b xml:space="preserve">333 </d:b> <d:c xml:space="preserve">xxx </d:c> </m:properties> </content> </entry> <entry> <id>http://localhost:1468/myWebDataService.svc/tabA(‘wxwinter%20%20‘)</id> <title type="text"></title> <updated>2008-11-17T11:14:32Z</updated> <author> <name /> </author> <link rel="edit" title="tabA" href="tabA(‘wxwinter%20%20‘)" /> <category term="myDBModel.tabA" scheme="http://schemas.microsoft.com/ado/2007/08/dataservices/scheme" /> <content type="application/xml"> <m:properties> <d:a xml:space="preserve">wxwinter </d:a> <d:b xml:space="preserve">3 </d:b> <d:c xml:space="preserve">6 </d:c> </m:properties> </content> </entry> </feed> |
|
http://localhost:1468/myWebDataService.svc/tabA?$filter=a eq ‘wxd‘ |
|
http://localhost:1468/myWebDataService.svc/tabA?$filter=(a eq ‘wxwinter‘) and (b eq ‘3‘) |
|
<?xml version="1.0" encoding="utf-8" standalone="yes"?> <feed xml:base="http://localhost:1468/myWebDataService.svc/" xmlns:d="http://schemas.microsoft.com/ado/2007/08/dataservices" xmlns:m="http://schemas.microsoft.com/ado/2007/08/dataservices/metadata" xmlns="http://www.w3.org/2005/Atom"> <title type="text">tabA</title> <id>http://localhost:1468/myWebDataService.svc/tabA</id> <updated>2008-11-17T11:26:29Z</updated> <link rel="self" title="tabA" href="tabA" /> <entry> <id>http://localhost:1468/myWebDataService.svc/tabA(‘wxd%20%20%20%20%20%20%20‘)</id> <title type="text"></title> <updated>2008-11-17T11:26:29Z</updated> <author> <name /> </author> <link rel="edit" title="tabA" href="tabA(‘wxd%20%20%20%20%20%20%20‘)" /> <category term="myDBModel.tabA" scheme="http://schemas.microsoft.com/ado/2007/08/dataservices/scheme" /> <content type="application/xml"> <m:properties> <d:a xml:space="preserve">wxd </d:a> <d:b xml:space="preserve">1 </d:b> <d:c xml:space="preserve">4 </d:c> </m:properties> </content> </entry> </feed> |
|
http://localhost:1468/myWebDataService.svc/tabA?$filter=a ne ‘wxd‘ &$orderby=b |
|
<?xml version="1.0" encoding="utf-8" standalone="yes"?> <feed xml:base="http://localhost:1468/myWebDataService.svc/" xmlns:d="http://schemas.microsoft.com/ado/2007/08/dataservices" xmlns:m="http://schemas.microsoft.com/ado/2007/08/dataservices/metadata" xmlns="http://www.w3.org/2005/Atom"> <title type="text">tabA</title> <id>http://localhost:1468/myWebDataService.svc/tabA</id> <updated>2008-11-17T11:28:10Z</updated> <link rel="self" title="tabA" href="tabA" /> <entry> <id>http://localhost:1468/myWebDataService.svc/tabA(‘lzm%20%20%20%20%20%20%20‘)</id> <title type="text"></title> <updated>2008-11-17T11:28:10Z</updated> <author> <name /> </author> <link rel="edit" title="tabA" href="tabA(‘lzm%20%20%20%20%20%20%20‘)" /> <category term="myDBModel.tabA" scheme="http://schemas.microsoft.com/ado/2007/08/dataservices/scheme" /> <content type="application/xml"> <m:properties> <d:a xml:space="preserve">lzm </d:a> <d:b xml:space="preserve">2 </d:b> <d:c xml:space="preserve">5 </d:c> </m:properties> </content> </entry> <entry> <id>http://localhost:1468/myWebDataService.svc/tabA(‘wxwinter%20%20‘)</id> <title type="text"></title> <updated>2008-11-17T11:28:10Z</updated> <author> <name /> </author> <link rel="edit" title="tabA" href="tabA(‘wxwinter%20%20‘)" /> <category term="myDBModel.tabA" scheme="http://schemas.microsoft.com/ado/2007/08/dataservices/scheme" /> <content type="application/xml"> <m:properties> <d:a xml:space="preserve">wxwinter </d:a> <d:b xml:space="preserve">3 </d:b> <d:c xml:space="preserve">6 </d:c> </m:properties> </content> </entry> <entry> <id>http://localhost:1468/myWebDataService.svc/tabA(‘wxdlzm%20%20%20%20‘)</id> <title type="text"></title> <updated>2008-11-17T11:28:10Z</updated> <author> <name /> </author> <link rel="edit" title="tabA" href="tabA(‘wxdlzm%20%20%20%20‘)" /> <category term="myDBModel.tabA" scheme="http://schemas.microsoft.com/ado/2007/08/dataservices/scheme" /> <content type="application/xml"> <m:properties> <d:a xml:space="preserve">wxdlzm </d:a> <d:b xml:space="preserve">333 </d:b> <d:c xml:space="preserve">xxx </d:c> </m:properties> </content> </entry> </feed> |
|
http://localhost:1468/myWebDataService.svc/tabA?$filter=a ne ‘wxd‘ &$orderby=b &$skip=2&top=2 |
|
<?xml version="1.0" encoding="utf-8" standalone="yes"?> <feed xml:base="http://localhost:1468/myWebDataService.svc/" xmlns:d="http://schemas.microsoft.com/ado/2007/08/dataservices" xmlns:m="http://schemas.microsoft.com/ado/2007/08/dataservices/metadata" xmlns="http://www.w3.org/2005/Atom"> <title type="text">tabA</title> <id>http://localhost:1468/myWebDataService.svc/tabA</id> <updated>2008-11-17T11:30:20Z</updated> <link rel="self" title="tabA" href="tabA" /> <entry> <id>http://localhost:1468/myWebDataService.svc/tabA(‘wxdlzm%20%20%20%20‘)</id> <title type="text"></title> <updated>2008-11-17T11:30:20Z</updated> <author> <name /> </author> <link rel="edit" title="tabA" href="tabA(‘wxdlzm%20%20%20%20‘)" /> <category term="myDBModel.tabA" scheme="http://schemas.microsoft.com/ado/2007/08/dataservices/scheme" /> <content type="application/xml"> <m:properties> <d:a xml:space="preserve">wxdlzm </d:a> <d:b xml:space="preserve">333 </d:b> <d:c xml:space="preserve">xxx </d:c> </m:properties> </content> </entry> </feed> |
|
http://localhost:1468/myWebDataService.svc/tabA?$filter=a eq trim(‘ wxd ‘) |
|
<?xml version="1.0" encoding="utf-8" standalone="yes"?> <feed xml:base="http://localhost:1468/myWebDataService.svc/" xmlns:d="http://schemas.microsoft.com/ado/2007/08/dataservices" xmlns:m="http://schemas.microsoft.com/ado/2007/08/dataservices/metadata" xmlns="http://www.w3.org/2005/Atom"> <title type="text">tabA</title> <id>http://localhost:1468/myWebDataService.svc/tabA</id> <updated>2008-11-17T12:01:49Z</updated> <link rel="self" title="tabA" href="tabA" /> <entry> <id>http://localhost:1468/myWebDataService.svc/tabA(‘wxd%20%20%20%20%20%20%20‘)</id> <title type="text"></title> <updated>2008-11-17T12:01:49Z</updated> <author> <name /> </author> <link rel="edit" title="tabA" href="tabA(‘wxd%20%20%20%20%20%20%20‘)" /> <category term="myDBModel.tabA" scheme="http://schemas.microsoft.com/ado/2007/08/dataservices/scheme" /> <content type="application/xml"> <m:properties> <d:a xml:space="preserve">wxd </d:a> <d:b xml:space="preserve">1 </d:b> <d:c xml:space="preserve">4 </d:c> </m:properties> </content> </entry> </feed> |
[WebGet] 使用 GET方式访问
[WebInvoke] 使用 POST/PUT/DELETE 方式访问
|
public class myWebDataService : DataService<myDBEntities> {
public static void InitializeService(IDataServiceConfiguration config) { config.SetEntitySetAccessRule("*", EntitySetRights.All); // * :表示全部实体集 // EntitySetRights.All : 表示全部的操作权限
// config.SetServiceOperationAccessRule("getTabA", ServiceOperationRights.All); config.SetServiceOperationAccessRule("*", ServiceOperationRights.All); // * :表示全部实体集 // ServiceOperationRights.All : 表示全部的操作权限 }
[WebGet] public IQueryable<tabA> getTabA(string a) { var v= CurrentDataSource.tabA.Where(p => p.a == a); return v; }
[WebInvoke] public IQueryable<tabX> getTabX(string x) { var v = CurrentDataSource.tabX.Where(p => p.x == x); return v; } } |
方法名?参数=‘值
‘
|
http://localhost:1468/myWebDataService.svc/getTabA?a=‘lzm‘ |
|
<?xml version="1.0" encoding="utf-8" standalone="yes"?> <feed xml:base="http://localhost:1468/myWebDataService.svc/" xmlns:d="http://schemas.microsoft.com/ado/2007/08/dataservices" xmlns:m="http://schemas.microsoft.com/ado/2007/08/dataservices/metadata" xmlns="http://www.w3.org/2005/Atom"> <title type="text">getTabA</title> <id>http://localhost:1468/myWebDataService.svc/getTabA</id> <updated>2008-11-17T02:23:29Z</updated> <link rel="self" title="getTabA" href="getTabA" /> <entry> <id>http://localhost:1468/myWebDataService.svc/tabA(‘lzm%20%20%20%20%20%20%20‘)</id> <title type="text"></title> <updated>2008-11-17T02:23:29Z</updated> <author> <name /> </author> <link rel="edit" title="tabA" href="tabA(‘lzm%20%20%20%20%20%20%20‘)" /> <category term="myDBModel.tabA" scheme="http://schemas.microsoft.com/ado/2007/08/dataservices/scheme" /> <content type="application/xml"> <m:properties> <d:a xml:space="preserve">lzm </d:a> <d:b xml:space="preserve">2 </d:b> <d:c xml:space="preserve">5 </d:c> </m:properties> </content> </entry> </feed> |
查询拦截:当你仅仅想把具有某种状态或者特征的数据返回给客户端时，用拦截查询就可以实现
修改拦截:可以拦截提交到服务器的的数据更新操作：Add, Change ,Delete
|
public class myWebDataService : DataService<myDBEntities> {
public static void InitializeService(IDataServiceConfiguration config) { config.SetEntitySetAccessRule("*", EntitySetRights.All); // * :表示全部实体集 // EntitySetRights.All : 表示全部的操作权限 }
[QueryInterceptor("tabX")] public System.Linq.Expressions.Expression<Func<tabX, bool>> query_tabX() { return p => p.z != "wwxxdd"; //为真表示允许查询 }
} |
|
不使用QueryInterceptor的结果
使用QueryInterceptor的结果
|
|
public class myWebDataService : DataService<myDBEntities> {
public static void InitializeService(IDataServiceConfiguration config) { config.SetEntitySetAccessRule("*", EntitySetRights.All); // * :表示全部实体集 // EntitySetRights.All : 表示全部的操作权限 } [ChangeInterceptor("tabX")] public void change_tabX(tabX en, UpdateOperations operation) { //- if (operation == UpdateOperations.Add) { if (string.IsNullOrEmpty(en.y)) { //如果[y]为空的处理代码 } } //- if (operation == UpdateOperations.Change) { } //- if (operation == UpdateOperations.Delete) { } } } |
标签：frame desc loaddata ges asc 运算 rss rowspan esc
原文地址：http://www.cnblogs.com/sjqq/p/6782358.html
