Question

班级档案

Public Function bindData() As String
        Dim con As New SqlConnection("Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\Database.mdf;Integrated Security=True;User Instance=True")
        'Dim objDA As SqlDataAdapter
        Dim myRow As SqlDataReader
        Dim comd As New SqlCommand("SELECT * FROM products", con)
        con.Open()
        myRow = comd.ExecuteReader()
        Dim strRowGen As String = ""
        While myRow.Read()
            strRowGen = strRowGen & "<TR>"
            strRowGen = strRowGen & "<TD>" & myRow.GetValue(0) & "</TD>"
            strRowGen = strRowGen & "<TD>" & myRow.GetValue(1) & "</TD>"
            strRowGen = strRowGen & "<TD>" & myRow.GetValue(2) & "</TD>"
            strRowGen = strRowGen & "<TD><a href='#' onclick=""javascript:document.Form1.action='ShoppingPage.aspx?Actn=Add&itemId=" & myRow.GetValue(0) & "';document.Form1.submit();"">Add To Cart</TD>"
            strRowGen = strRowGen & "</TR>"
            'cellshoping.InnerHtml = strRowGen
        End While
        Return strRowGen
    End Function

ASPX代码背后

Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
    'Put user code to initialize the page here
    'Load data by calling function bindData()
            Dim sCart = New ShoppingCart
            If Not Page.IsPostBack Then

                cellshoping.InnerHtml = sCart.bindData()
            End If
End Sub

现在，当我运行页面时，我收到此错误“BC30456：'bindData'不是'shoppingCart1.ShoppingCart'的成员。 “

Answer 1

问题是您的aspx页面和购物车类不在同一名称空间中。

您需要添加

Namespace shoppingCart1

（和结束命名空间）到您的shoppingcart类或从页面中删除命名空间。

Answer 2

检查班级的层次结构。在你的cs文件中，如果它是一个纯类文件，而不是后面的代码。你必须

using System;

namespace yourNameSpace
{
  public class yourClassName
  {
     public function binddata()
     {
            // your logic
     }
   }
}


aspx.cs/vb

partial class aspxClass
{
   dim yourObjectName as new yourClassName()
   //do whatever with the object


}

Answer 3

在Visual Studio 2005或2008中部署项目时经常发生此错误。这个错误的主要原因是同一个项目的bin文件夹中存在重复的dll名称，你要做的就是从bin文件夹中删除未使用的dll文件

BC30456：'bindData'不是'shoppingCart1.ShoppingCart'的成员

3 个答案: