📄 deserializeclass.aspx

📁 asp.net技术内幕的书配源码

💻 ASPX

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<%@ Import Namespace="myComponents" %>
<%@ Import Namespace="System.IO" %>
<%@ Import Namespace="System.Runtime.Serialization.Formatters.Binary" %>
<%@ Import Namespace="System.Data.SqlClient" %>

<Script runat="Server">

Sub Button_Click( s As Object, e As EventArgs )
  Dim objUserInfo As UserInfo
  Dim objMemoryStream As MemoryStream
  Dim objBinaryFormatter As BinaryFormatter
  Dim conMyData As SqlConnection
  Dim cmdSelect As SqlCommand
  Dim dtrUserInfo As SqlDataReader
  Dim arrByte As Byte()

  conMyData = New SqlConnection( "Server=localhost;UID=sa;PWD=secret;Database=myData" )
  cmdSelect = New SqlCommand( _
    "sELECT username, userInfo FROM Userlist WHERE username=@username", _
    conMyData )
  cmdSelect.Parameters.Add( "@username", txtUsername.Text )
  conMyData.Open()
    dtrUserInfo = cmdSelect.ExecuteReader()
    If dtrUserInfo.Read Then
      arrByte = dtrUserInfo( "userinfo" )
      objMemoryStream = New MemoryStream( arrByte )
      objBinaryFormatter = New BinaryFormatter
      objUserInfo = CType( _
        objBinaryFormatter.Deserialize( objMemoryStream ), _
        UserInfo )
      txtPassword.Text = objUserInfo.Password
      txtEmail.Text = objUserInfo.Email
    End If
  conMyData.Close()
End Sub

</Script>

<html>
<head><title>DeserializeClass.aspx</title></head>
<body>
<form runat="Server">

Username:
<br><asp:TextBox 
  id="txtUsername" 
  runat="Server" />
<p>
<asp:Button 
  Text="Retrieve!" 
  OnClick="Button_Click" 
  runat="Server" />
<hr>
Password:
<br><asp:Label 
  id="txtPassword" 
  EnableViewState="False"
  runat="Server" />
<p>
Email:
<br><asp:Label 
  id="txtEmail" 
  EnableViewState="False"
  runat="Server" />
<p>

</form>
</body>
</html>

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