Comments by tpwright4423

tpwright4423 31-Mar-12 23:20pm View

Thanks for the comment. I will try your suggestion when I get a moment.

During my numerous attempts to understand what was happening, I added a foreach loop to walk through displayedOrders and locate the appropriate row by the contained value of interest (an approach I avoided in my original implementation because of its poor performance) and ov.Equals(foundRow) returned false. That, coupled with the observed failure to select the DataGrid row, leads me to believe that a different instance was returned from query = displayedOrders.Where(x => x.PutAwayNo == pSearchFor) et al.

The statement that puzzles you is how I am extracting the first row returned from the queries (there can be multiple rows with the value being looked for). Why does that seem odd to you? Is this the place where I admit that I am a Linq-to-SQL newbie? ;-)

tpwright4423 8-Nov-11 7:52am View

Deleted

Very clever. However, without the comment explaining that the AddRange causes Count to be increased, thereby causing the children of new members of the list to be examined, it is, IMHO, an approach to be avoided.

tpwright4423 9-May-11 16:15pm View

But, clearly you DO have god-like knowledge! And thanks to your tip, I have discovered that binding the dictionary object to the DataContext of my UI element allows me to bind other dependency properties to my source object's properties via the {Binding Path=OtherPropertyName} syntax. Gooey-ness is good!

tpwright4423 9-May-11 9:48am View

Oops! Forgot to edit that one occurrence, didn't I?

Thanks for the help. As usual, the solution, once seen, seems so easy.

tpwright4423 9-May-11 8:28am View

...and just how did you know that my app was OPC-related?

tpwright4423 8-May-11 17:49pm View

Pete, thank you for the (naturally) oh-so-simple solution. Perfect! Is my WPF newbie-ness showing?

Regards,
Tom

tpwright4423 16-Feb-11 22:16pm View

OK. Here's the link. Thanks very much for taking the time to look at it.

https://cid-ecf0057ed7459dbc.skydrive.live.com/redir.aspx?resid=ECF0057ED7459DBC!104

Regards,
Tom

tpwright4423 16-Feb-11 13:09pm View

I have extrapolated my problem to a rather simple test case. I have the source code in a .zip file. Would you care to look at it? If so, how can I get it to you?

Thanks in advance.
Tom

tpwright4423 16-Feb-11 12:19pm View

Well, it turns out that I had previously implemented INotifyPropertyChanged in my data object for each property that can change value after it has been bound to the ListView, so raising that event whenever the property value changes is NOT causing my data converter to be called again. Got another idea?

Thanks,
Tom

tpwright4423 16-Feb-11 8:53am View

Sigh. I will try again later -- got to run now.

tpwright4423 16-Feb-11 8:52am View

Well, I'm not sure why the XAML for the ListView.View didn't appear. I will try again.

<ListView Height="380" Name="lvwPickList" Width="840" HorizontalContentAlignment="Center"
ItemContainerStyle="{StaticResource ICStyle}" >
<ListView.View>
<gridview>
<gridviewcolumn width="30" header="Bay"
="" displaymemberbinding="{Binding BayNumber}">
<gridviewcolumn width="35" header="Shelf"
="" displaymemberbinding="{Binding Shelf}">
<gridviewcolumn width="50" header="Position"
="" displaymemberbinding="{Binding Position}">
<gridviewcolumn width="90" header="SKU"
="" displaymemberbinding="{Binding SKU}">
<gridviewcolumn width="75" header="Qty To Pick"
="" displaymemberbinding="{Binding QtyToPick}">
<gridviewcolumn width="75" header="Qty Picked"
="" displaymemberbinding="{Binding QtyPicked}">
<gridviewcolumn width="75" header="Complete At"
="" displaymemberbinding="{Binding FormattedPickCompleteAt}">

</ListView.View>
</ListView>

tpwright4423 16-Feb-11 8:50am View

Thank you very much for taking the time to answer.

I was surprised when, with no additional effort, the ListView cell contents were being updated updated to reflect the change in value. Is that happening independently of the INotifyPropertyChanged interface implementation?

I have read through the article you reference once and I aplogize in advance if my next questions betray my lack of WPF understanding. The only ListView binding I specify in the XAML is that for the columns:

<ListView Height="380" Name="lvwPickList" Width="840" HorizontalContentAlignment="Center"
ItemContainerStyle="{StaticResource ICStyle}" >
<ListView.View>
<gridview>
<gridviewcolumn width="30" header="Bay"
="" displaymemberbinding="{Binding BayNumber}">
<gridviewcolumn width="35" header="Shelf"
="" displaymemberbinding="{Binding Shelf}">
<gridviewcolumn width="50" header="Position"
="" displaymemberbinding="{Binding Position}">
<gridviewcolumn width="90" header="SKU"
="" displaymemberbinding="{Binding SKU}">
<gridviewcolumn width="75" header="Qty To Pick"
="" displaymemberbinding="{Binding QtyToPick}">
<gridviewcolumn width="75" header="Qty Picked"
="" displaymemberbinding="{Binding QtyPicked}">
<gridviewcolumn width="75" header="Complete At"
="" displaymemberbinding="{Binding FormattedPickCompleteAt}">

</ListView.View>
</ListView>

What is the default binding Mode? Where should I specify that I want OneWay binding? If I implement the INotifyPropertyChanged interface, will the value converter I created for setting the background color be called when a value changes or do I need to implement another converter?

Thanks in advance for your help.
Tom

tpwright4423 16-Feb-11 8:40am View

Thanks. My "newbie" status is showing -- I blindly followed the link in the e-mail notification of your posting. :-)

Comments by tpwright4423 (Top 13 by date)