EntityDataSource's Provider="" Keeps appearing automatically

Hi, This is happening almost from the day i started using nettiers (a weeks ago). In this example, i started a new webform from scratch. I have a , inside an tabcontainer and two tabs (AJAX). on one tab, i have GridView, and its DataSource (i'd read in another post that datasource must be at the same level as GridView is). Now, whenever i make a chage in the form, the following error arises (wich keeps me from building my project, and so, work :P ) ArticleDataSource:Cannot create an object of type 'Test.Data.IEntityProvider`2[[Test.Entities.Articles, Test.Entities, Version=1.0.1.0, Culture=neutral, PublicKeyToken=null],[Test.Entities.ArticlesKey, Test.Entities, Version=1.0.1.0, Culture=neutral, PublicKeyToken=null]]' from its string representation '' for the 'Provider' property. Funny thing is that in markup there are only a few (properties) wich i defined! If anyone could drop me a hint on this i´d be very thankfull. See you,

Have you tried generating the sample website? does it work ok?

 Perhaps you could post your code.

hth

swin 

Yes, im currently working with the sample website, adding functionality i need. Is the problem im using ajax's tabcontainer?

I dont have access to the code right now (im out), but as soon i can (a few hours) i'll post the code.

 

thankx for replying!

 try your sample without ajax to see if its to do with the tabcontainer.

hth

swin 

I am suffering the same issue. Here is my setup:

Error:

Error 1 Cannot create an object of type 'TRIP.Data.IEntityProvider`2[[TRIP.Entities.BaseCheckListItem, TRIP.Entities, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null],[TRIP.Entities.BaseCheckListItemKey, TRIP.Entities, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]]' from its string representation '' for the 'Provider' property. E:\Repositories\DECS_Outdoor_Activities\src\System\TripAdmin\refdata\BaseCheckListItems.aspx 28 

ASPX:

<%@ Page Language="C#" MasterPageFile="~/MasterPage.master" AutoEventWireup="true" CodeFile="BaseCheckListItems.aspx.cs" Inherits="refdata_BaseCheckListItems" Title="Base Check List Items" StylesheetTheme="Default" %>

<%@ Register Assembly="TRIP.Web" Namespace="TRIP.Web.Data" TagPrefix="cc1" %>

<asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder2" Runat="Server">

Base Check List Items

</asp:Content>

<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">

<asp:GridView ID="grdItems" runat="server" AutoGenerateColumns="False" BackColor="White"

BorderColor="#DEDFDE" BorderStyle="None" BorderWidth="1px" CellPadding="4" ForeColor="Black"

GridLines="Vertical" Width="100%" AutoGenerateDeleteButton="True" AutoGenerateEditButton="True" OnRowEditing="grdItems_RowEditing" DataSourceID="BaseCheckListItemDataSource1">

<FooterStyle BackColor="#CCCC99" />

<Columns>

<asp:TemplateField HeaderText="Check List Item Description">

<EditItemTemplate>

<asp:TextBox ID="TextBox1" runat="server" Text='<%# Bind("CheckListItem") %>'></asp:TextBox>

</EditItemTemplate>

<ItemTemplate>

<asp:Label ID="Label1" runat="server" Text='<%# Bind("CheckListItem") %>'></asp:Label>

</ItemTemplate>

</asp:TemplateField>

</Columns>

<RowStyle BackColor="#F7F7DE" />

<SelectedRowStyle BackColor="#CE5D5A" Font-Bold="True" ForeColor="White" />

<PagerStyle BackColor="#F7F7DE" ForeColor="Black" HorizontalAlign="Right" />

<HeaderStyle BackColor="#6B696B" Font-Bold="True" ForeColor="White" />

<AlternatingRowStyle BackColor="White" />

</asp:GridView>

<cc1:BaseCheckListItemDataSource ID="BaseCheckListItemDataSource1" runat="server"

CacheDuration="30" CustomMethodRecordCountParamName="" EnableCaching="False" EnableDeepLoad="False"

EnablePaging="False" EnableRecursiveDeepLoad="False" EnableSorting="False" EnableTransaction="True"

Filter="" InsertMethod="Insert" Provider="" SelectMethod="GetAll" Sort="" UpdateMethod="Update">

<DeepLoadProperties Method="IncludeChildren" Recursive="False">

</DeepLoadProperties>

</cc1:BaseCheckListItemDataSource>

 

</asp:Content>

My next task is to run this on a page not linked to a Master Page and see if that fails too. 

 

Ok, after rummaging around and reading other posts:

http://community.codesmithtools.com/forums/p/4853/19557.aspx#19557 

 I can see that we are not supposed to set the Provider property, It is exposed as a public property and the drag & drop operation puts all public properties into the markup.

Resolution:

simply remove the provider attribute and it works well.

I think we could just add the ToolboxData attribute to the DataSource controls and that way we can control the markup that gets created when they are dropped on the design surface.

[ToolboxData("<{0}:XXXDataSource ID=\"XXXDataSource\" runat=\"server\" EnableTransactions=\"true\"  > </{0}:XXXDataSource>")]

I haven't tested this, but I think it would work.  We just need to decide which properties should get added automatically.

I am still encountering this error when using the <data: controls in a wizard. Has your solution been tested and proven, if so please provide a method to implement the work around.

regards,

Cliff

Hey Cliff,

I didn't see that solution above in the template anywhere. If you want to add it to EntityDataSouce.cst and test it out. Let me know the results and I'll get it added to core :).

Thanks

-Blake Niemyjski