SilverLight中使用WebService对数据库做CRUD
public class MainService : System.Web.Services.WebService
{
#region User CRUD
[WebMethod]
public bool createuser(string userName)
{
try
{
sqlConnection _sqlConnection = new sqlConnection();
_sqlConnection.ConnectionString = ConfigurationManager.
ConnectionStrings["sqlConnectionString"].ToString();
sqlCommand command = new sqlCommand();
command.Connection = _sqlConnection;
command.CommandType = CommandType.Text;
command.CommandText = "INSERT INTO [User] ([UserName]) VALUES ('" +
userName.ToString().Replace("'","''") + "')";
command.ExecuteNonQuery();
_sqlConnection.Close();
return true;
}
catch (Exception ex)
{
return false;
}
}
[WebMethod]
public string RetrieveUser(int userId)
{
try
{
sqlConnection _sqlConnection = new sqlConnection();
_sqlConnection.ConnectionString = ConfigurationManager.
ConnectionStrings["sqlConnectionString"].ToString();
sqlDataAdapter da = new sqlDataAdapter();
da.SelectCommand = new sqlCommand("SELECT * FROM [User] WHERE [UserID] = " +
userId.ToString().Replace("'","''"),_sqlConnection);
DataSet ds = new DataSet();
da.Fill(ds);
StringBuilder sb = new StringBuilder();
sb.Append("<?xml version=/"1.0/" encoding=/"utf-8/" ?>");
sb.Append("<Users>");
foreach (DaTarow dr in ds.Tables[0].Rows)
{
sb.Append("<User>");
sb.Append("<ID>");
sb.Append(dr[0].ToString());
sb.Append("</ID>");
sb.Append("<Name>");
sb.Append(dr[1].ToString());
sb.Append("</Name>");
sb.Append("</User>");
}
sb.Append("</Users>");
_sqlConnection.Close();
return sb.ToString();
}
catch (Exception ex)
{
return string.Empty;
}
}
[WebMethod]
public string RetrieveUsers()
{
try
{
sqlConnection _sqlConnection = new sqlConnection();
_sqlConnection.ConnectionString = ConfigurationManager.
ConnectionStrings["sqlConnectionString"].ToString();
sqlDataAdapter da = new sqlDataAdapter();
da.SelectCommand = new sqlCommand("SELECT * FROM [User]",_sqlConnection);
DataSet ds = new DataSet();
da.Fill(ds);
StringBuilder sb = new StringBuilder();
sb.Append("<?xml version=/"1.0/" encoding=/"utf-8/" ?>");
sb.Append("<Users>");
foreach (DaTarow dr in ds.Tables[0].Rows)
{
sb.Append("<User>");
sb.Append("<UserID>");
sb.Append(dr[0].ToString());
sb.Append("</UserID>");
sb.Append("<UserName>");
sb.Append(dr[1].ToString());
sb.Append("</UserName>");
sb.Append("</User>");
}
sb.Append("</Users>");
_sqlConnection.Close();
return sb.ToString();
}
catch (Exception ex)
{
return string.Empty;
}
}
[WebMethod]
public bool UpdateUser(int userID,string userName)
{
try
{
sqlConnection _sqlConnection = new sqlConnection();
_sqlConnection.ConnectionString = ConfigurationManager.
ConnectionStrings["sqlConnectionString"].ToString();
sqlCommand command = new sqlCommand();
command.Connection = _sqlConnection;
command.CommandType = CommandType.Text;
command.CommandText = "UPDATE [User] " +
"SET [UserName] = '" + userName.ToString().Replace("'","''") + "'" +
"WHERE [UserID] = " + userID.ToString();
command.ExecuteNonQuery();
_sqlConnection.Close();
return true;
}
catch (Exception ex)
{
return false;
}
}
[WebMethod]
public bool DeleteUser(int userID)
{
try
{
sqlConnection _sqlConnection = new sqlConnection();
_sqlConnection.ConnectionString = ConfigurationManager.
ConnectionStrings["sqlConnectionString"].ToString();
sqlCommand command = new sqlCommand();
command.Connection = _sqlConnection;
command.CommandType = CommandType.Text;
command.CommandText = "DELETE [User] WHERE [UserID] = " + userID.ToString();
command.ExecuteNonQuery();
_sqlConnection.Close();
return true;
}
catch (Exception ex)
{
return false;
}
}
#endregion
}
<data:DataGrid x:Name="dgWork" Background="Aquamarine" Height="200"
Width="700" Margin="0,5,10"
AutoGenerateColumns="False" >
<data:DataGrid.Columns>
<data:DataGridTextColumn Header="用户ID" IsReadOnly="True" Width="80" Binding="{Binding UserID}" />
<data:DataGridTextColumn Header="用户名称" IsReadOnly="True" Width="200" Binding="{Binding UserName}" />
</data:DataGrid.Columns>
</data:DataGrid>
3. 在SilverLight项目中新建实体类
public class User
{
public int UserID { get; set; }
public string UserName { get; set; }
}
public partial class MainPage : UserControl
{
public MainPage()
{
InitializeComponent();
Loaded += new RoutedEventHandler(MainPage_Loaded);
}
private void MainPage_Loaded(object sender,RoutedEventArgs e)
{
ListingControldisplay();
}
/// <summary>
/// 显示数据
/// </summary>
/// <param name="sender"></param>
void ListingControldisplay()
{
MainServiceSoapClient userMgrSoapClient = new MainServiceSoapClient();
userMgrSoapClient.RetrieveUsersAsync();
userMgrSoapClient.RetrieveUsersCompleted += new EventHandler<RetrieveUsersCompletedEventArgs>(userMgrSoapClient_RetrieveUsersCompleted);
}
/// <summary>
/// 取数完成后，显示数据
/// </summary>
/// <param name="sender"></param>
void userMgrSoapClient_RetrieveUsersCompleted(object sender,MainService.RetrieveUsersCompletedEventArgs e)
{
if (e.Error == null)
{
displayData(e.Result);
}
}
/// <summary>
/// 显示数据到界面上
/// </summary>
/// <param name="xmlContent"></param>
private void displayData(string xmlContent)
{
if (xmlContent != string.Empty)
{
XDocument xmlUsers = XDocument.Parse(xmlContent);
var users = from user in xmlUsers.Descendants("User")
select new
{
UserID = Convert.ToInt32
(user.Element("UserID").Value),
UserName = (string)
user.Element("UserName").Value
};
List<User> usersList = new List<User>();
foreach (var u in users)
{
User use = new User { UserID = u.UserID,UserName = u.UserName };
usersList.Add(use);
}
dgWork.ItemsSource = usersList;
}
else
{
dgWork.ItemsSource = null;
}
}
}
版权声明：本文内容由互联网用户自发贡献，该文观点与技术仅代表作者本人。本站仅提供信息存储空间服务，不拥有所有权，不承担相关法律责任。如发现本站有涉嫌侵权/违法违规的内容， 请发送邮件至 [email protected] 举报，一经查实，本站将立刻删除。