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在silverlight中通过WCF连接ORACLE DB数据库

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Freigeben: 2016-06-07 15:44:32
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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

-----------------------------------------------------------------------------------------------------------

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;

在silverlight中通过WCF连接ORACLE DB数据库

然后就多了这个东西:

在silverlight中通过WCF连接ORACLE DB数据库(图MB)

第三步:在解决方案上右键,添加“新项目”。选择Window——类库;

在silverlight中通过WCF连接ORACLE DB数据库

              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。

在silverlight中通过WCF连接ORACLE DB数据库

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”);

在silverlight中通过WCF连接ORACLE DB数据库

按发现;不行对吧?

很好,因为你要先按F5编译一次程序。再来!

在silverlight中通过WCF连接ORACLE DB数据库

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

            {

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

            }

        }

    }

}

最后总观~

在silverlight中通过WCF连接ORACLE DB数据库

-------------------------------------------------------

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

--------------------------------------------

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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