silverlight通过WCF访问SQLserver示例

VS2013+sql2012+win8.1测试通过 作者：一剑

1.创建sliverlight项目testWCFsql；
2.右击web项目添加新建项->类,命名为ClassDBserver,修改代码：

using System.Data;

using System.Data.SqlClient;

using System.Web.Configuration;



namespace testWCFsql.Web

{

    public class ClassDBserver

    {

        static public DataSet DBselect(string sql)

        {

            string conn;

            conn = "Data Source=none;Initial Catalog=comDB;User ID=sa;Password=123456";

            //conn = WebConfigurationManager.AppSettings.Get("DBappSettings");

            //conn = WebConfigurationManager.ConnectionStrings["myConnectionString"].ConnectionString;

            try

            {

                using (SqlConnection cnn = new SqlConnection(conn))

                {

                    cnn.Open();

                    using (SqlTransaction trans = cnn.BeginTransaction(IsolationLevel.Serializable))

                    {

                        try

                        {

                            using (SqlCommand cmd = new SqlCommand(sql, cnn))

                            {

                                cmd.Transaction = trans;

                                using (DataSet ds = new DataSet())

                                {

                                    using (SqlDataAdapter da = new SqlDataAdapter(cmd))

                                    {

                                        da.Fill(ds);

                                        trans.Commit();

                                    }

                                    return ds;

                                }

                            }

                        }

                        catch (Exception ex)

                        {

                            trans.Rollback();

                            return new DataSet();

                            throw ex;

                        }

                        finally

                        {

                        }

                    }

                }

            }

            catch (Exception ex)

            {

                return new DataSet();

                throw ex;

            }

        }

    }

}

3.右击testWCFsql.web项目添加新建项“启用了Silverlight的WCF服务”,命名为ServiceWCF；
4.修改

[OperationContract]

public void DoWork()

{

  return;

 }

为

using System.Data;

using System.Collections.Generic;



[OperationContract]

public List<ClassEmployee> getData()

{

    DataSet ds = ClassDBserver.DBselect("select * from employee");

    List<ClassEmployee> userList = new List<ClassEmployee>();//添加using System.Collections.Generic;

    foreach (DataRow dr in ds.Tables[0].Rows)

    {

        ClassEmployee user = new ClassEmployee();//userList是引用类型，所以这句不能放foreach外面

        user.ID = (int)dr["ID"];

        user.name = (string)dr["name"];

        user.departmentID = (int)dr["departmentID"];

        userList.Add(user);

    }

    return userList;

}

[DataContract]

public class ClassEmployee

{

    [DataMember]

    public int ID;

    [DataMember]

    public string name;

    [DataMember]

    public int departmentID;

}

5.生成一下；
6.右击客户端testWCFsql项目，添加服务引用->发现，默认ServiceReference1，确定；
7.双击页面文件MainPage.xaml.cs,从工具箱中拖入DataGrid控件,命名为datagrid1；
8.修改后台代码为：

using System.Xml;

using System.IO;



namespace testWCFsql

{

    public partial class MainPage : UserControl

    {

        public MainPage()

        {

            InitializeComponent();

            ServiceReference1.ServiceWCFClient myClient = new ServiceReference1.ServiceWCFClient();

            myClient.getDataCompleted += new EventHandler<ServiceReference1.getDataCompletedEventArgs >(myGetDataCompleted);

            myClient.getDataAsync();

        }



        void myGetDataCompleted(object sender, ServiceReference1.getDataCompletedEventArgs e)

        {

            System.Collections.ObjectModel.ObservableCollection<ServiceReference1.ServiceWCFClassEmployee> users = e.Result;

            datagrid1.ItemsSource = users;

        }

    }

}

9.此步可选：双击Weg.config修改，在

<configuration>

    <system.web>

之间插入

    <appSettings>

      <add key="DBappSetting" value="Data Source=none;Initial Catalog=comDB;User ID=sa;Password=123456"/>

    </appSettings>

    <connectionStrings>

      <add name="myConnectionString" connectionString="Data Source=none;Initial Catalog=comDB;User ID=sa;Password=123456" providerName="System.Data.SqlClient"/>

    </connectionStrings>

同时修改前面ClassDBserver.cs中的连接字符串为从配置文件中读取。
10.Now，just run it!!