组件 DataList 和 ObjectDataSource

功能强大的组件。我这里主要介绍一下

asp.net 端的代码：

 

 

 1                  <asp:DataList id="dlstProducts" DataSourceID="srcProducts" RepeatColumns="1" Runat="server">
 2                      <ItemTemplate>  
 3                           Property ()Property<%#IIf(CType(Eval("Manynumber"), Integer) > 1, "&nbsp;" & Eval("Numberproperyies") & "&nbsp;", "&nbsp;")%>details
 4                           <br /><br />  
 5                           <asp:Label ID="dizhi" runat="server" Text="di zhi : " CssClass="title2"></asp:Label>
 6                           <%#Eval("dizhi")%></span>
 7                           <br /><br />
 8                           <asp:Label ID="youbian" runat="server" Text="you bian:  " CssClass="title2"></asp:Label>
 9                           <%#Eval("youbian")%>
                           <br /><br />
                           <asp:Label ID="jiage1" runat="server" Text="jia ge 1 :  " CssClass="title2"></asp:Label>
                           <%#String.Format("{0:c}", Eval("jiage1"))%>
                           <br /><br />
                           <asp:Label ID="jiage2" runat="server" Text="jia ge 2 :  " CssClass="title2"></asp:Label>
                           <%#IIf(Eval("jiage2") = 0, "", String.Format("{0:c}", Eval("Contentsvalue"))) & "<br /><br />"%>
                       </ItemTemplate>
                  </asp:DataList>
              
                 <asp:ObjectDataSource id="srcProducts"
                         TypeName="xxx.xxxxClass"
                         SelectMethod="SelectCustomerId" Runat="server" OnSelecting="srcProducts_Selecting">
                        <SelectParameters>
                              <asp:Parameter Name="CustomerID" Type="Int32" />
                        </SelectParameters>    
                 </asp:ObjectDataSource> 

 

app_code 的类

 

Imports Microsoft.VisualBasic
Imports System
Imports System.IO
Imports System.Data
Imports System.Data.SqlClient
Imports System.Web.Configuration
Imports System.Collections.Generic

Namespace xxxx

    ''' <summary>
    ''' Represents a product and methods for
    ''' working with products
    ''' </summary>
    Public Class xxxxClass

        Private Shared ReadOnly _connectionString As String
        Private _id As Integer
        Private _manynumber As Integer
        Private _dizhi As String
        Private _youbian As String
        Private _jiage1 As Decimal
        Private _jiage2 As Decimal
        Private _number As String

        Public Property Id() As Integer
            Get
                Return _id
            End Get
            Set(ByVal Value As Integer)
                _id = Value
            End Set
        End Property

        Public Property dizhi() As String
            Get
                Return _dizhi
            End Get
            Set(ByVal Value As String)
                _dizhi = Value
            End Set
        End Property

        Public Property Number() As String
            Get
                Return _number
            End Get
            Set(ByVal Value As String)
                _number = Value
            End Set
        End Property

        Public Property youbian() As String
            Get
                Return _youbian 
            End Get
            Set(ByVal Value As String)
                _youbian = Value
            End Set
        End Property

        Public Property jiage1() As Decimal
            Get
                Return _jiage1
            End Get
            Set(ByVal Value As Decimal)
                _jiage1 = Value
            End Set
        End Property


        Public Property jiage2() As Decimal
            Get
                Return _jiag2
            End Get
            Set(ByVal Value As Decimal)
                _jiage2 = Value
            End Set
        End Property


        ''' <summary>
        ''' Select all products in a particular category
        ''' </summary>
        ''' 

        Public Shared Function SelectCustomerId(ByVal CustomerID As Integer) As List(Of xxxxClass)
            ' Initialize command
            Dim con As New SqlConnection(_connectionString)
            Dim cmd As New SqlCommand("xxxxxSelectByCustomerId", con)
            cmd.CommandType = CommandType.StoredProcedure

            ' Add parameters
            cmd.Parameters.AddWithValue("@CustomerID", CustomerID)

            Dim results As New List(Of PropertyClass)()
            Using con
                con.Open()
                Dim reader As SqlDataReader = cmd.ExecuteReader()
                While reader.Read()
                    results.Add(New xxxxClass(reader))
                End While
            End Using
            Return results
        End Function


        ''' <summary>
        ''' Initializes a product from a DataReader
        ''' </summary>
        Public Sub New(ByVal reader As SqlDataReader)

            _id = CType(reader("CustomerID"), Integer)
            _dizhi= CType(reader("dizhi"), String)
            _youbian= CType(reader("youbian"), String)
            _jiage1= CType(reader("jiage1"), Decimal)
            _jiage2= CType(reader("jiage2"), Decimal)

            _manynumber = CType(reader("manynumber "), Integer)
        End Sub

        ''' <summary>
        ''' Retrieve database connection string from Web configuration
        ''' </summary>
        Shared Sub New()

            _connectionString = "data source=sdd,user name=xxx, password=xxxx"

        End Sub

    End Class
End Namespace

这些代码是 帮助理解， 做个小测试。