Home  >  Article  >  Database  >  在silverlight中通过WCF连接ORACLE DB数据库

在silverlight中通过WCF连接ORACLE DB数据库

WBOY
WBOYOriginal
2016-06-07 15:44:32997browse

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

    }

}

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

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!

 

Statement:
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn