Steve,
Thanks for your help. I managed to find the problem. Thanks for bringing
up "<almost>". I [reluctantly] went back to the problematic code and looked
for differences. I found a single line in code-behind that called
DataBind() on the form view. The call took place in Page_Load() on post
back. It all makes sense now. By binding the form view I was [implicitly]
restoring original values and initializing new ones with empty/null before
the BLL's methods were called by the framework.
I spend a lot of time looking into BLL, aspx page, and other event handlers
and ignoring the simplest one which was Page_Load(). I think I learned my
lesson.
Thanks,
Bob
<wisccal [at] googlemail.com> wrote in message
news:a7737018-58e7-4de1-92e7-607bf1cc07f6 [at] b1g2000hsg.googleg roups.com...
> Hi Bob,
>
> Without seeing your code, it's not that easy to pinpoint the problem.
> You're saying you created an <almost> identical page. So what is
> different between the two pages? If codebehind is exactly the same,
> then the problem is most likely the web page file.
>
> Also, I would try and hook into the different events of the
> ObjectDataSource control like OnObjectCreated, OnDataBinding, etc. An
> example would be:
>
> in your aspx file:
> <asp:ObjectDataSource ID="itemDataSource"
> OnObjectCreated="itemDataSource_ObjectCreated" ...>
>
> in the codebehind:
> protected void itemDataSource_ObjectCreated(object s,
> ObjectDataSourceEventArgs e)
> {
> ///...test your objects. E.g. what is the value of
> e.ObjectInstance, of your controls?
> }
>
> HTH.
>
> ==========
> Regards,
> Steve
> www.stkomp.com
>
> bob wrote:
>> Thanks for the reply. The ItemID is read from another control which is a
>> dropdownlist.
>>
>> I have created similar pages with the same BLL in the past and had no
>> problems. I just created a replacement page that is almost identical to
>> the
>> one I had problems with and it works as expected. I could use the new
>> page
>> instead but it bothers me that I can't figure out why the original did
>> not
>> work. In insert mode all parameters passed to BLL were null or
>> uninitialized and in update mode old values were passed.
>> I wasted a whole day trying to debug it. I'm afraid that something like
>> that can happen on the deployment machine. The problem is that I do not
>> know what else to do in order to debug it. It almost looks like the
>> framework is generating (or using from a cache) code that I do not
>> expect.
>>
>> Any hints on how to debug it? Although I have another page working well
>> (and doing what the original was supposed to) I'm still holding on to the
>> original hoping to find out what the problem is.
>>
>> Thanks
>>
>> <wisccal [at] googlemail.com> wrote in message
>> news:9a4c9efd-fb6c-4682-9fbe-d52bed70601b [at] a1g2000hsb.googleg roups.com...
>> > Hi Bob,
>> >
>> > I can't reproduce your problem. How do you determine the the ID of the
>> > record to update? Here is my example that works just fine on my
>> > machine:
>> >
>> >
>> > Default.aspx:
>> >
>> > <% [at] Page Language="C#" AutoEventWireup="true"
>> > CodeBehind="Default.aspx.cs" Inherits="WebApplication2._Default" %>
>> > <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://
>> > www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
>> > <html xmlns="http://www.w3.org/1999/xhtml" >
>> > <head runat="server">
>> > </head>
>> > <body>
>> > <form id="form1" runat="server">
>> > <div>
>> > <asp:DropDownList ID="ItemDDL" AutoPostback="true" runat="server">
>> > <asp:ListItem Value="1" Text="This one" />
>> > <asp:ListItem Value="2" Text="That one" />
>> > <asp:ListItem Value="3" Text="Maybe here" />
>> > <asp:ListItem Value="4" Text="Or there" />
>> > </asp:DropDownList>
>> > <asp:FormView ID="itemFormView" runat="server" DataKeyNames="ItemID"
>> > DataSourceID="itemDataSource">
>> > <EditItemTemplate>
>> > Start Date:
>> > <asp:TextBox ID="StartDateTextBox" runat="server"
>> > Text='<%#
>> > Bind("StartDate") %>'></asp:TextBox>
>> > End Date:
>> > <asp:TextBox ID="EndDateTextBox" runat="server" Text='<
>> > %#
>> > Bind("EndDate") %>'></asp:TextBox>
>> > Content:
>> > <asp:TextBox ID="ContentTextBox" runat="server" Text='<
>> > %#
>> > Bind("Content") %>'></asp:TextBox>
>> > <asp:LinkButton ID="UpdateButton" runat="server"
>> > CausesValidation="False" CommandName="Update"
>> > Text="Update"></asp:LinkButton>
>> > <asp:LinkButton ID="UpdateCancelButton" runat="server"
>> > CausesValidation="False" CommandName="Cancel"
>> > Text="Cancel"></asp:LinkButton>
>> > </EditItemTemplate>
>> > <InsertItemTemplate>
>> > Start Date:
>> > <asp:TextBox ID="StartDateTextBox" runat="server"
>> > Text='<%#
>> > Bind("StartDate") %>'></asp:TextBox>
>> > End Date:
>> > <asp:TextBox ID="EndDateTextBox" runat="server" Text='<
>> > %#
>> > Bind("EndDate") %>'></asp:TextBox>
>> > Content:
>> > <asp:TextBox ID="ContentTextBox" runat="server" Text='<
>> > %#
>> > Bind("Content") %>'></asp:TextBox>
>> > <asp:LinkButton ID="UpdateButton" runat="server"
>> > CausesValidation="False" CommandName="Update"
>> > Text="Update"></asp:LinkButton>
>> > <asp:LinkButton ID="UpdateCancelButton" runat="server"
>> > CausesValidation="False" CommandName="Cancel"
>> > Text="Cancel"></asp:LinkButton>
>> > </InsertItemTemplate>
>> > <ItemTemplate>
>> > Start Date:
>> > <asp:TextBox ID="StartDateTextBox" runat="server"
>> > Text='<%#
>> > Bind("StartDate") %>'></asp:TextBox>
>> > End Date:
>> > <asp:TextBox ID="EndDateTextBox" runat="server" Text='<
>> > %#
>> > Bind("EndDate") %>'></asp:TextBox>
>> > Content:
>> > <asp:TextBox ID="ContentTextBox" runat="server" Text='<
>> > %#
>> > Bind("Content") %>'></asp:TextBox>
>> > <asp:LinkButton ID="EditButton" runat="server"
>> > CausesValidation="False" CommandName="Edit"
>> > Text="Edit"></asp:LinkButton>
>> > </ItemTemplate>
>> > </asp:FormView>
>> > <asp:ObjectDataSource ID="itemDataSource" runat="server"
>> > OldValuesParameterFormatString="{0}"
>> > TypeName="Webapplication2.ItemsBLL" UpdateMethod="UpdateItem"
>> > SelectMethod="GetItemByItemID" >
>> > <UpdateParameters>
>> > <asp:ControlParameter ControlID="ItemDDL" Name="itemID"
>> > Type="Int32" />
>> > <asp:Parameter Name="startDate" Type="DateTime" />
>> > <asp:Parameter Name="endDate" Type="DateTime" />
>> > <asp:Parameter Name="content" Type="String" />
>> > </UpdateParameters>
>> > <SelectParameters>
>> > <asp:ControlParameter ControlID="ItemDDL" Name="itemID"
>> > Type="Int32" />
>> > </SelectParameters>
>> > </asp:ObjectDataSource>
>> > </div>
>> > </form>
>> > </body>
>> > </html>
>> >
>> >
>> > Default.aspx.cs:
>> >
>> > using System;
>> > using System.Linq;
>> > using System.Data.Linq;
>> > using System.Web;
>> > using System.Web.UI;
>> >
>> > namespace WebApplication2
>> > {
>> > public partial class _Default : System.Web.UI.Page
>> > {
>> > }
>> >
>> > public class ItemsBLL {
>> > private static System.Collections.Generic.List<Item> items =
>> > new System.Collections.Generic.List<Item>() {
>> > new Item {ItemID = 1, StartDate = new DateTime(2007,5,3),
>> > EndDate = new DateTime(2007,11,12), Content="Great News"},
>> > new Item {ItemID = 2, StartDate = new DateTime(2008,1,1),
>> > EndDate = new DateTime(2008,1,31), Content="Bad News"},
>> > new Item {ItemID = 4, StartDate = new DateTime(1999,7,4),
>> > EndDate = DateTime.Now, Content="Not Sure"}
>> > };
>> >
>> >
>> > [System.ComponentModel.DataObjectMethod(System.ComponentMode l.DataObjectMethodType.Select,
>> > true)]
>> > public Item GetItemByItemID(int itemID)
>> > {
>> > var its = items.Where(i => i.ItemID == itemID);
>> > if(its.Count() > 0) {
>> > return its.First();
>> > }
>> > return null;
>> > }
>> >
>> > [System.ComponentModel.DataObjectMethodAttribute
>> > (System.ComponentModel.DataObjectMethodType.Update, true)]
>> > public bool UpdateItem(int itemID, DateTime startDate,
>> > DateTime endDate, string content) {
>> > var its = items.Where(i => i.ItemID == itemID);
>> > if(its.Count() > 0) {
>> > Item it = its.First();
>> > it.StartDate = startDate;
>> > it.EndDate = endDate;
>> > it.Content = content;
>> > return true;
>> > }
>> > return false;
>> > }
>> > }
>> > public class Item {
>> > public int ItemID {
>> > get;set;
>> > }
>> > public DateTime StartDate {
>> > get;set;
>> > }
>> > public DateTime EndDate {
>> > get;set;
>> > }
>> > public string Content {
>> > get;set;
>> > }
>> > }
>> > }
>> >
>> >
>> > ===========
>> > Regards,
>> > Steve
>> > www.stkomp.com
>> >
>> > bob wrote:
>> >> Hi,
>> >>
>> >> I have an object data source attached to a form view. The data source
>> >> calls
>> >> bll's update method. I can't figure out why the bll's update method
>> >> never
>> >> gets updated fields - it always gets original values. I made sure
>> >> that
>> >> fields are two-way bound in the form's <EditItemTemplate>. I don't
>> >> get
>> >> any
>> >> runtime errors. I set a breakpoint in the update method and can
>> >> clearly
>> >> see
>> >> that old values are passed to it.
>> >>
>> >> My bll's update method is declared as follows:
>> >>
>> >> [System.ComponentModel.DataObjectMethodAttribute
>> >> (System.ComponentModel.DataObjectMethodType.Update, true)]
>> >> public bool UpdateItem(int itemID, DateTime startDate, DateTime
>> >> endDate,
>> >> string content);
>> >>
>> >> The form view:
>> >>
>> >> <asp:FormView ID="itemFormView" runat="server" DataKeyNames="ItemID"
>> >> DataSourceID="itemDataSource">
>> >> <EditItemTemplate>
>> >> Start Date:
>> >> <asp:TextBox ID="StartDateTextBox" runat="server" Text='<%#
>> >> Bind("StartDate") %>'></asp:TextBox>
>> >> End Date:
>> >> <asp:TextBox ID="EndDateTextBox" runat="server" Text='<%#
>> >> Bind("EndDate") %>'></asp:TextBox>
>> >> Content:
>> >> <asp:TextBox ID="ContentTextBox" runat="server" Text='<%#
>> >> Bind("Content") %>'></asp:TextBox>
>> >> <asp:LinkButton ID="UpdateButton" runat="server"
>> >> CausesValidation="True" CommandName="Update"
>> >> Text="Update"></asp:LinkButton>
>> >> <asp:LinkButton ID="UpdateCancelButton" runat="server"
>> >> CausesValidation="False" CommandName="Cancel"
>> >> Text="Cancel"></asp:LinkButton>
>> >> </EditItemTemplate>
>> >> <InsertItemTemplate>
>> >> [...]
>> >> </InsertItemTemplate>
>> >> <ItemTemplate>
>> >> [...]
>> >> </ItemTemplate>
>> >> </asp:FormView>
>> >> <asp:ObjectDataSource ID="itemDataSource" runat="server"
>> >> DeleteMethod="DeleteItem"
>> >> InsertMethod="AddItem" OldValuesParameterFormatString="{0}"
>> >> TypeName="ItemsBLL" UpdateMethod="UpdateItem"
>> >> SelectMethod="GetItemByItemID" >
>> >> <UpdateParameters>
>> >> <asp:Parameter Name="startDate" Type="DateTime" />
>> >> <asp:Parameter Name="endDate" Type="DateTime" />
>> >> <asp:Parameter Name="content" Type="String" />
>> >> </UpdateParameters>
>> >> [...]
>> >> </asp:ObjectDataSource>
>> >>
>> >>
>> >> I'd appreciate any help/pointers because I'm stuck at this point.
>> >>
>> >> Thanks,
>> >> Bob.
