这是来公司后做的第三个实例项目，功能是Silverlight+WCF+sql Server实现对数据库数据的增删改查。过程中也遇到一些问题。不过还好解决了！刚开始以为自己做不出来呢，没想到竟然成功了！值此十一国庆佳节之际特此记录！祝大家国庆快乐！
解决方案如下：
创建过程：
1.打开VS，创建silverlight程序，选择web站点承载silverlight程序；
WCF契约：
public interface IUserService
{
[OperationContract]
List<User> RetrieveUser();
[OperationContract]
bool createuser(int userID,string userName);
[OperationContract]
bool UpdateUser(int userID,string userName);
[OperationContract]
bool DeleteUser(int userID);
}
[DataContract]
public class User
{
[DataMember]
public int UserId {get; set;}
[DataMember]
public string UserName { get; set; }
}WCF契约实现：
//查询用户 public List<User> RetrieveUser() { List<User> user = new List<User>(); try { sqlConnection _sqlConnection =new sqlConnection("Database=test1;Server=服务器名;Integrated Security=false;password=123;user id=sa;"); _sqlConnection.open(); sqlDataAdapter da = new sqlDataAdapter("SELECT * FROM [User] ",_sqlConnection); DataSet ds = new DataSet(); da.Fill(ds); foreach (DaTarow row in ds.Tables[0].Rows) { User a = new User(); a.UserId =(int) row["UserId"]; a.UserName =(string) row["UserName"]; user.Add(a); } return user; } catch (Exception ex) { user.Clear(); return user; } } //创建用户 public bool createuser(int userID,string userName) { try { sqlConnection _sqlConnection = new sqlConnection("Database=test1;Server=服务器名;Integrated Security=false;password=123;user id=sa;"); _sqlConnection.open(); sqlCommand command = new sqlCommand(); command.Connection = _sqlConnection; command.CommandType = CommandType.Text; command.CommandText = "INSERT INTO [User] ([UserId],[UserName]) VALUES ('" + userID+ "','" + userName+ "')"; command.ExecuteNonQuery(); _sqlConnection.Close(); return true; } catch (Exception ex) { return false; } } //更新用户 public bool UpdateUser(int userID,string userName) { try { sqlConnection _sqlConnection = new sqlConnection("Database=test1;Server=服务器名;Integrated Security=false;password=123;user id=sa;"); _sqlConnection.open(); sqlCommand command = new sqlCommand(); command.Connection = _sqlConnection; command.CommandType = CommandType.Text; command.CommandText = "UPDATE [User] SET [UserName] = " +userName + "WHERE [UserId] = " + userID; command.ExecuteNonQuery(); _sqlConnection.Close(); return true; } catch (Exception ex) { return false; } } //删除用户 public bool DeleteUser(int userID) { try { sqlConnection _sqlConnection = new sqlConnection("Database=test1;Server=服务器名;Integrated Security=false;password=123;user id=sa;"); _sqlConnection.open(); sqlCommand command = new sqlCommand(); command.Connection = _sqlConnection; command.CommandType = CommandType.Text; command.CommandText = "DELETE [User] WHERE [UserId] =" + userID; command.ExecuteNonQuery(); _sqlConnection.Close(); return true; } catch (Exception ex) { return false; } }
3.在silverlight中添加wcf的服务引用。
MainPage前台：
<Grid x:Name="LayoutRoot" Background="White">
<StackPanel HorizontalAlignment="Center" VerticalAlignment="Center">
<StackPanel VerticalAlignment="Center" HorizontalAlignment="Center">
<StackPanel Orientation="Horizontal">
<TextBlock TextAlignment="Center" VerticalAlignment="Center">UserId:</TextBlock>
<TextBox x:Name="userid" Width="76" Margin="21,0"></TextBox>
</StackPanel>
</StackPanel>
<StackPanel Margin="0,10,0" HorizontalAlignment="Center" VerticalAlignment="Center">
<StackPanel Orientation="Horizontal">
<TextBlock VerticalAlignment="Center" TextAlignment="Center" HorizontalAlignment="Center">UserName:</TextBlock>
<TextBox x:Name="username" Width="76"></TextBox>
</StackPanel>
</StackPanel>
<StackPanel Orientation="Horizontal" HorizontalAlignment="Center" VerticalAlignment="Center">
<StackPanel Margin="0,0">
<Button x:Name="btnselect" Click="btnselect_Click" Margin="30,0">SelectButton</Button>
</StackPanel>
<StackPanel Margin="0,0">
<Button x:Name="btnupdate" Click="btnupdate_Click" Margin="10,0">UpdateButton</Button>
</StackPanel>
<StackPanel Margin="0,0">
<Button Click="deleteButton_Click" Margin="10,0">DeleteButton</Button>
</StackPanel>
<StackPanel Margin="0,0">
<Button x:Name="btncreate" Click="btncreate_Click" Margin="10,0">CreateButton</Button>
</StackPanel>
</StackPanel>
<StackPanel>
</StackPanel>
<StackPanel Height="165" Margin="0,0">
<sdk:DataGrid AutoGenerateColumns="False" Height="152" Name="dataGrid1" Width="144" DataContext="{Binding}" SelectionChanged="dataGrid1_SelectionChanged">
<sdk:DataGrid.Columns>
<sdk:DataGridTextColumn Binding="{Binding UserId,Mode=TwoWay}" CanUserReorder="True" CanUserResize="True" CanUserSort="True" Header="UserId" Width="Auto" />
<sdk:DataGridTextColumn Binding="{Binding UserName,Mode=TwoWay}" CanUserReorder="True" CanUserResize="True" CanUserSort="True" Header="UserName" Width="Auto" />
</sdk:DataGrid.Columns>
</sdk:DataGrid>
</StackPanel>
</StackPanel>
</Grid>
MainPage后台：
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 LYY.UserService; namespace LYY { public partial class MainPage : UserControl { public MainPage() { InitializeComponent(); } void deleteButton_Click(object sender,RoutedEventArgs e) { UserServiceClient userSvcclient = new UserServiceClient(); int userID; userID = Convert.ToInt32(this.userid.Text); userSvcclient.DeleteUserCompleted += new EventHandler<DeleteUserCompletedEventArgs> (userSvcclient_DeleteUserCompleted); userSvcclient.DeleteUserAsync(userID); } void userSvcclient_DeleteUserCompleted(object sender,DeleteUserCompletedEventArgs e) { if (e.Error == null) { MessageBox.Show("删除用户成功！"); } else { MessageBox.Show("删除用户失败！"); } } private void btncreate_Click(object sender,RoutedEventArgs e) { UserServiceClient client = new UserServiceClient(); int userID; userID = Convert.ToInt32(this.userid.Text); string username = this.username.Text; client.createuserCompleted += new EventHandler<createuserCompletedEventArgs>(client_create); client.createuserAsync(userID,username); } void client_create(object sender,createuserCompletedEventArgs e) { if (e.Result) { MessageBox.Show("用户创建成功！"); } else { MessageBox.Show("用户创建成功！"); } } private void btnupdate_Click(object sender,RoutedEventArgs e) { UserServiceClient client = new UserServiceClient(); int userID; userID = Convert.ToInt32(this.userid.Text); string username = this.username.Text; client.UpdateUserCompleted += new EventHandler<UpdateUserCompletedEventArgs>(client_update); client.UpdateUserAsync(userID,username); } void client_update(object sender,UpdateUserCompletedEventArgs e) { if (e.Result) { MessageBox.Show("用户更新成功！"); } else { MessageBox.Show("用户更新成功！"); } } private void btnselect_Click(object sender,RoutedEventArgs e) { UserServiceClient client = new UserServiceClient(); client.RetrieveUserCompleted += new EventHandler<RetrieveUserCompletedEventArgs>(client_select); client.RetrieveUserAsync(); } void client_select(object sender,RetrieveUserCompletedEventArgs e) { if (e.Error==null) { this.dataGrid1.ItemsSource = e.Result; } } private void dataGrid1_SelectionChanged(object sender,SelectionChangedEventArgs e) { User current = new User(); current = (User)this.dataGrid1.SelectedItem; this.userid.Text = Convert.ToString(current.UserId); this.username.Text = current.UserName; } } }
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