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在silverlight中通过WCF连接ORACLEDB数据库

时间:2021-07-01 10:21:17 帮助过:58人阅读

原文:How to get data from Oracle DB in silverlight via WCF ? http://hi.baidu.com/%C7%A7%C0%EF%BA%AE%C9%AB/blog/item/f18b7cc46cfe29dc38db4945.html --------------------------------------------------------------------------------------------

原文:How to get data from Oracle DB in silverlight via WCF ?

http://hi.baidu.com/%C7%A7%C0%EF%BA%AE%C9%AB/blog/item/f18b7cc46cfe29dc38db4945.html

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第一步:新建Silverlight应用程序;

第二步:在.web类型项目上右键,添加“新建项”。选择Silverlight——启用了Silverlight的WCF服务;

然后就多了这个东西:

(图MB)

第三步:在解决方案上右键,添加“新项目”。选择Window——类库;

此类库为调用查询的数据表的属性集合,因此要写上数据表中需要用到字段以及GET、SET方法。

注意此处要在CS文件中添加using System.Runtime.Serialization引用,在类库的引用中添加System.Runtime.Serialization.dll!

这个类库个人理解为一个数据结构,用来存储返回数据表的数据。

第四步:改写第二步中生成的.svc文件下的.svc.cs文件——在.Web类型项目下的(图MB所示)

将:

public void DoWork()

{

// 在此处添加操作实现

return;

}

改写为:

public List GetDatabyName(Int32 pInParam)

{

String oracleSql;

List returnlist = new List();

//用LIST来获取DATASET

//创建ORACLE连接

String oracleConnString = "Data Source=testDB;User Id=TEST;Password=test;";

OracleConnection cnn = new OracleConnection(oracleConnString);

cnn.Open();

oracleSql = "SELECT * FROM TBL_TEST WHERE MYID=" + pInParam;

OracleCommand cmd = new OracleCommand(oracleSql, cnn);

OracleDataAdapter da = new OracleDataAdapter(cmd);

DataSet ds = new DataSet();

da.Fill(ds, "TBL_TEST");

foreach (DataRow dr in ds.Tables["TBL_TEST"].Rows)

{

returnlist.Add(new Class1

{

MYID = Convert.ToInt32(dr["MYID"]),

MYRECORD = dr["MYRECORD"].ToString()

});

}

//以LIST形式返回DATASET

return returnlist;

}

注意了,要添加引用:

using System.Collections.Generic;——用来说明List

using ClassLibrary1;

using System.Data.OracleClient;

using System.Data;——用来说明DATASET

在.web下的引用添加System.Data.OracleClient.dll——用来解释ORACLE语句;还有你的类库也要添加!在引用中的项目里添加——用来解释List<>中的数据类型!

----------------------------------最终代码---------------------------------------

using System;

using System.Linq;

using System.Runtime.Serialization;

using System.ServiceModel;

using System.ServiceModel.Activation;

using System.Collections.Generic;

using ClassLibrary1;

using System.Data.OracleClient;

using System.Data;

namespace SilverlightApplication7.Web

{

[ServiceContract(Namespace = "")]

[AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)]

public class Service1

{

[OperationContract]

public List GetDatabyName(Int32 pInParam)

{

String oracleSql;

List returnlist = new List();

//Get your Customer Data from Oracle DB, if you use DataSet, get the DataSet,

//Create Customer Object for each row in your DataTable

String oracleConnString = "Data Source=testDB;User Id=TEST;Password=test;";

OracleConnection cnn = new OracleConnection(oracleConnString);

cnn.Open();

//pass your SQL filter paramenter here

oracleSql = "SELECT * FROM TBL_TEST WHERE MYID=" + pInParam;

//oracleSql = "SELECT * FROM TBL_TEST";

OracleCommand cmd = new OracleCommand(oracleSql, cnn);

OracleDataAdapter da = new OracleDataAdapter(cmd);

DataSet ds = new DataSet();

da.Fill(ds, "TBL_TEST");

foreach (DataRow dr in ds.Tables["TBL_TEST"].Rows)

{

returnlist.Add(new Class1

{

MYID = Convert.ToInt32(dr["MYID"]),

MYRECORD = dr["MYRECORD"].ToString()

});

}

return returnlist;

}

// 在此处添加更多操作并使用 [OperationContract] 标记它们

}

}

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第五步:快成功了!在C#文件(就是除了.web还有类库以外的那个文件头那里,右键,添加“服务引用”);

按发现;不行对吧?

很好,因为你要先按F5编译一次程序。再来!

行了!(不行的同学留言吧~为你们默哀)

第六步:在MainPage.xaml中做一点点修改,首先加一个BUTTON,名为myButton,再加一个TextBox,名为myText。

在MainPage.xaml.cs添加引用using System.Collections.ObjectModel;using SilverlightApplication7.ServiceReference1;

最后MainPage.xaml.cs完整代码为:

using System;

using System.Collections.Generic;

using System.Linq;

using System.Net;

using System.Windows;

using System.Windows.Controls;

using System.Windows.Documents;

using System.Windows.Input;

using System.Windows.Media;

using System.Windows.Media.Animation;

using System.Windows.Shapes;

using System.Collections.ObjectModel;

using SilverlightApplication7.ServiceReference1;

namespace SilverlightApplication7

{

public partial class MainPage : UserControl

{

public MainPage()

{

InitializeComponent();

}

private void myButton_Click(object sender, RoutedEventArgs e)

{

SilverlightApplication7.ServiceReference1.Service1Client client = new SilverlightApplication7.ServiceReference1.Service1Client();

//Pass your parameter , pass id 4 will return string "Ray"

client.GetDatabyNameAsync(Convert.ToInt32(myText.Text.ToString()));

client.GetDatabyNameCompleted += new EventHandler(client_GetDatabyNameCompleted);

//Close the connection, when you get the error connection timeout , acctually, the connections limited to 10 for each client.

client.CloseAsync();

}

private void client_GetDatabyNameCompleted(object sender, GetDatabyNameCompletedEventArgs e)

{

//We need a collection object to receive the return list form WCF

//We can only use the class defined in Web Service to create client instance

System.Collections.ObjectModel.ObservableCollection temp =

new ObservableCollection();

temp = e.Result;

for (int i = 0; i < temp.Count; i++)

{

MessageBox.Show(temp[i].MYID.ToString() + " and " + temp[i].MYRECORD.ToString());

}

}

}

}

最后总观~

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对了,你还要有一个ORACLE数据库,我这个例子是:数据库名:testDB;用户名:TEST;密码:test;所以对应语句为Data Source=testDB;User Id=TEST;Password=test;

然后生成一个表——在ORACLE的SQL PLUS中或者什么的,自己解决:

CREATE TABLE TBL_TEST

(

MYID NUMBER(20),

MYRECORD VARCHAR2(50 BYTE)

)

Insert into TBL_TEST(MYID, MYRECORD)Values(1, 'Hello');

Insert into TBL_TEST(MYID, MYRECORD)Values(2, 'I');

Insert into TBL_TEST(MYID, MYRECORD)Values(3, 'am');

Insert into TBL_TEST(MYID, MYRECORD)Values(4, 'Ray');

表名为TBL_TEST

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最后最后再提醒,记得在MainPage.xaml中的Butto语句中添加Click事件——如最后所示!

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