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including a cs file in an aspx file dont work. Why?

Posted on 2009-05-11
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Last Modified: 2012-05-06
I cant include my cs file in my aspx file.

I get this error.   (the filminfo file is under a folder called App_Code

Description: An error occurred during the compilation of a resource required to service this request. Please review the following specific error details and modify your source code appropriately.

Compiler Error Message: CS0433: The type 'ProjektFilm.Filminfo' exists in both 'c:\WINNT\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\root\10920de8\7170bc22\assembly\dl3\eaa4bec6\caa0f9f7_04d2c901\ProjektFilm.DLL' and 'c:\WINNT\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\root\10920de8\7170bc22\App_Code.2xun89dv.dll'
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="test.aspx.cs" Inherits="ProjektFilm.test" %>
 
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
 
<%@ Import Namespace="System.Data" %>
<%@ Import Namespace="System.Data.SqlClient" %>
<%@ Import Namespace="System.Collections.Generic" %>
<%@ Import Namespace="ProjektFilm" %>
 
<html>
<head>
<title>ButtonField ButtonType Example</title>
 
<script language="C#" runat="server">
   DataTable Cart;
   DataView CartView;
 
   void Page_Load ( Object src, EventArgs e ) {
      if ( !IsPostBack ) {
 
          myGrid.DataSource = (List<Filminfo>)Session["film"];
          myGrid.DataBind();
      }
 
      if ( Session [ "shoppingSession" ] == null ) {
         Cart = new DataTable ( );
         Cart.Columns.Add ( new DataColumn ( "Item", typeof ( string ) ) );
         Cart.Columns.Add ( new DataColumn ( "Price", typeof ( string ) ) );
         Session [ "shoppingSession" ] = Cart;
      }
      else Cart = ( DataTable ) Session [ "shoppingSession" ];
 
      CartView = new DataView ( Cart );
      shopCart.DataSource = CartView;
      shopCart.DataBind ( );
   }
 
   void updateCart ( Object src, GridViewCommandEventArgs e ) {
      DataRow dr = Cart.NewRow ( );
 
      // get the row index stored in the CommandArgument property
      int index = Convert.ToInt32 ( e.CommandArgument );
 
      // get the GridViewRow where the command is raised
      GridViewRow selectedRow = ( ( GridView ) e.CommandSource ).Rows [ index ];
 
      // for bound fields, values are stored in the Text property of Cells [ fieldIndex ]
      string item = selectedRow.Cells [ 1 ].Text;
      string price = selectedRow.Cells [ 2 ].Text;
 
      if ( e.CommandName == "AddToCart" ) {
         dr [ 0 ] = item; dr [ 1 ] = price;
         Cart.Rows.Add ( dr );
      }
      else {  // remove from Cart
         CartView.RowFilter = "Item='" + item + "'";
         if ( CartView.Count > 0 ) CartView.Delete ( 0 );
         CartView.RowFilter = "";
      }
      shopCart.DataBind ( );
   }
 
   void setButtonStyle ( Object src, GridViewRowEventArgs e ) {
      if ( e.Row.RowType == DataControlRowType.DataRow ) {
         IDataRecord rowView = ( IDataRecord ) e.Row.DataItem;
         TableCellCollection cells = e.Row.Cells;
         ( ( Button ) cells [ 3 ].Controls [ 0 ] ).CssClass = "add";
         ( ( Button ) cells [ 4 ].Controls [ 0 ] ).CssClass = "remove";
      }
   }
</script>
</head>
 
<body>
 
<div class="header"><h3>&nbsp;</h3>
    <h3>Lägg till film</h3></div>
 
<p class="small">&nbsp;<hr size=1 width=90%>
 
<form id="Form1" runat="server">
 
<table cellpadding="5">
<tr valign="top">
   <td><b>Product List</b>
 
      <asp:gridview id="myGrid" runat="server"
         cellpadding=5 font-size="8pt"
         gridlines="horizontal"
         autogeneratecolumns=false
         onRowCreated="setButtonStyle"
         onRowCommand="updateCart">
 
         <headerstyle backcolor="darkslategray"
            forecolor="khaki" font-bold />
 
         <rowstyle backcolor="ivory" verticalalign="top" />
 
         <columns>
 
            <asp:boundfield
               headertext="Title"
               datafield="title" />
 
            <asp:boundfield
               headertext="Item"
               datafield="title_id" />
 
            <asp:boundfield
               headertext="Price"
               datafield="price"
               dataformatstring="{0:c}"
               itemstyle-horizontalalign="right" />
 
            <asp:buttonfield
               text=" + "
               buttontype="button"
               commandname="AddToCart"  />
 
            <asp:buttonfield
               text=" - "
               buttontype="button"
               commandname="RemoveFromCart" />
 
         </columns>
 
      </asp:gridview>
   </td>
 
   <td><b>Shopping Cart</b>
 
      <asp:gridview id="shopCart" runat="server"
         cellpadding=5 font-size="8pt"
         headerstyle-backcolor="darkslategray"
         headerstyle-forecolor="khaki"
         headerstyle-font-bold
         rowstyle-backcolor="ivory"
         rowstyle-verticalalign="top" />
 
   </td></tr>
</table>
 
</form>
 
<hr size=1 width=90%>
 
</body>
</html>

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Question by:Mickeys
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Accepted Solution

by:
tillgeffken earned 500 total points
ID: 24352178
Taken from ScottGu's Blog:

"VERY, VERY IMPORTANT: Because ASP.NET 2.0 tries to dynamically compile any classes     it finds under the /App_Code directory of an application at runtime, you explictly *DO NOT* want to      store classes that you compile as part of your VS 2005 Web Application Project under an "app_code" folder.     If you do this, then the class will get compiled twice -- once as part of the VS 2005 Web Application Project     assembly, and then again at runtime by ASP.NET.  The result will most likely be a "could not load type"     runtime exception -- caused because you have duplicate type names in your application.  Instead, you      should store your class files in any other directory of your project other than one named "app_code"."
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