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• Problem with WPF perfomance.

  - by Polaris

  I have form which has many tabs. Every tab has many controls textboxes, comboboxes, datagrids and e .t.c. I bind form to one data source in such way this.DataContext=MyClassInstance But with this way my form opening very slow. about one minute. When I comment above code, form opens very quickly. All My controls I bound to the class properties in XAML. Please tell me the way to bind every tab when it's activated, or bind controls in background thread or any other idea which can help me to speed up my form. Thanks in advance.

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• Diagramming in Silverlight MVVM- connecting shapes

  - by silverfighter

  Hi, have I have a quesition regarding MVVM pattern in the uses case of diagramming. What I have so far is a list of Items which are my Shapes. ObservableCollection<ItemsViewModels> Items; and a Collection of Connection of Items ObservableCollection<ConnectionViewModel> Each ItemViewModel has an ID and a ConnectionViewModel has two ID to connect the Items. My ItemsViewModel Collection is bound to a itemscontrol which is layout on a Canvas. With the ElementMouseDragBehavior I am able to drag my Items around. Now comes my big question =) How can I visualize my connections that I will be able to move the items around and the items stay connected with a line either straign or bezier. I don't know how to abstract that with the mvvm pattern. Thanks for any help...

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• How to aggregate bindings in Silverlight UserControl

  - by Peter Wone

  Imagine a UserControl containing some sort of ItemsControl. The UserControl as a whole has a DataContext, but you also need to expose the ItemsSource of the ItemsControl. I have tried all manner of arrangements, and eventually passed a DomainDataSource as a UserControl dependency property named DDS, and bound the ItemsControl like this: ItemsSource="{Binding DDS.Data, ElementName=userControl}" It works, but this is mucky, and with Silverlight mucky is nearly always a sign of incorrect approach. Your advice is sought. It looks like multi-bindings might be the answer to this.

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• RadGrid cannot pass sortExpression to ObjectDataSourceControl

  - by Jeff

  I have a Telerik RadGrid that bound to a datasource object. They are configured to support custom paging, sorting. For paging, only the data of a page is retrieved from the database. Before sorting, it works fine. The select method of the datasource is like public List<xxx> Select(string sortExpression, int maximumRows, int startRowIndex) {} Before sorting the sortExpression is empty, which is expected. But after use click sort, in the OnSortCommand event handler of Radgrid, the SortExpression is correct, indicating RadGrid has caputre user's sorting correctly. protected void OnSort(object source, GridSortCommandEventArgs e) { Console.WriteLine(e.SortExpression); // correct } But what is strange is that the RadGrid does not pass parameter to DataSource correctly this time. sortExpression is still empty, maximumRows became int.Max, and startRowIndex is 0. The the sorting in still render correctly, but grid ask datasource to get all data and do the sorting locally. Is this bug of RadGrid or my configuration is wrong?

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• ComboBox wpf not item not being selected

  - by Greg R

  I am trying to bind a combo box to a list of objects, and it works great, besides the selected value, am I missing somethign? <ComboBox ItemsSource="{Binding OrderInfoVm.AllCountries}" SelectedValuePath="country_code" DisplayMemberPath="country_name" SelectedValue="{Binding OrderInfoVm.BillingCountry}" /> Basically I want to bind value to country codes and set the selected value to the country code bound to OrderInfoVm.BillingCountry (which implements INotifyPropertyChanged) Initially when the control loads selected value is empty, but on click BillingCountry is populated. Selected value does not seem to change. How can I remedy that?

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• How can I make a grid of clickable images from a list of data in WPF?

  - by mico

  Hello, I am a seasoned C and Java programmer, but an absolute WPF newbie. I am creating a kiosk application that will display a list of images of products that the user will click to see product details and maybe place an order. I am trying to structure my app with MVVM Foundation because I am used to the benefits of structure and tests. I wonder what is the most natural way to create a grid of clickable images that will fill the screen left to right, top to bottom (or the other way round, I have no exact requirements). Any image should be bound to an object that will become current and be displayed in the next screen. Thanks for your help.

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• Can't find controls in FormView.InsertItemTemplate even on DataBound event

  - by abatishchev

  I have FormView in my page markup: <asp:FormView ruanat="server" ID="FormView1" OnDataBound="FormView1_DataBound" DataSourceID="SqlDataSource1"> <InsertItemTemplate> <uc:UserControl1 runat="server" ID="ucUserControl1" /> </InsertItemTemplate> </asp:FormView> <asp:SqlDataSource runat="server" ID="SqlDataSource1" SelectCommand="EXEC someSP" /> It's code-behind: protected void FormView1_DataBound (object sender, EventArgs e) { var c1 = ((FormView)sender).FindControl("ucUserControl1"); // returns null var c2 = FormView1.FindControl("ucUserControl1"); // also returns null } In theory, I'm able to find control on FormView after it being data bound. But I'm not. Why?

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• Increase columns width in Silverlight DataGrid to fill whole DG width

  - by Henrik P. Hessel

  Hello, I have a DataGrid Control which is bound to a SQL Table. The XAML Code is: <data:DataGrid x:Name="dg_sql_data" Grid.Row="1" Visibility="Collapsed" Height="auto" Margin="0,5,5,5" AutoGenerateColumns="false" AlternatingRowBackground="Aqua" Opacity="80" > <data:DataGrid.Columns> <data:DataGridTextColumn Header="Latitude" Binding="{Binding lat}" /> <data:DataGridTextColumn Header="Longitude" Binding="{Binding long}" /> <data:DataGridTextColumn Header="Time" Binding="{Binding time}" /> </data:DataGrid.Columns> </data:DataGrid> Is it possible increase the single columns sizes to fill out the complete width of the datagrid? thx!, rAyt Edit: Columns with "*" as width are coming with the Silverlight SDK 4.

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• Implement a HierarchicalDataBoundControl for ASP.NET

  - by Breadtruck

  I want to implement a Hierarchical data bound control for ASP.NET. I used Implementing IHierarchy Support Into Your Custom Collection as a basis to create my hierarchical collection. I also created a HierarchicalDataSourceControl for the collection. Everything works: I can bind it to an ASP.NET TreeView and it renders the data correctly. However, I'm stuck on the HierarchicalDataBoundControl. I found examples, but I am still too new at c# / .Net to understand them. I don't quite understand how to implement the examples: Rendering a databound UL menu nor HierarchicalDataBoundControl Class Does anyone have any tips, or better examples of implementing a control like this?

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• WPF/MVVM: How can I use several CollectionView`s for aggregated entities ?

  - by msfanboy

  Hello, I have a Customer with Orders and those have products. Everything aggregated with collections of type ObservableCollection. All 3 collections are bound to a datagrid/combobox. I can only make the root collection (ObservableCollection Customers{ get;set;} ) passing to a CollectionView so I can move the current customer within the combobox. But how can I move around the current Order in the datagrid? How to pass the selected Orders to another CollectionView ? Does all this maybe not work?

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• WPF DataGrid issue with db40

  - by Rich Blumer

  I am using the following code to populate a wpf datagrid with items in my db4o OODB: IObjectContainer db = Db4oEmbedded.OpenFile(Db4oEmbedded.NewConfiguration(), "C:\Dev\ContractKeeper\Database\ContractKeeper.yap"); var contractTypes = db.Query(typeof(ContractType)); this.dataGrid1.ItemsSource = contractTypes.ToList(); Here is the XAML: <Window x:Class="ContractKeeper.Window1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:dg="http://schemas.microsoft.com/wpf/2008/toolkit" Title="Window1" Height="300" Width="300"> <Grid> <dg:DataGrid AutoGenerateColumns="True" Margin="12,102,12,24" Name="dataGrid1" /> </Grid> </Window> When the items get bound to the datagrid, the gridlines appear like there are records but no data is displayed. Has anyone had this issue with db4o and the wpf datagrid?

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• AnkhSVN: moving a project to another repo

  - by pcampbell

  My task is to move this VS solution and projects to another SVN server. I'm working with Visual Studio 2010 RC1 and AnkhSVN 2.1.7819.... Currently the files are all bound to a repo at C:\Repositories\foo. I'd like to move it to http://someSite/svn/foo I'm presented with this error message: Repository UUID '152c39db-5799-4234-85f2-074004a6fcad' doesn't match expected UUID '6c83444d-7f93-d64a-b0a0-23283495cf17' Questions How can I avoid this message in AnkhSVN? Are there better solutions for moving the source into a repo on the new target? How can I get Ankh to 'forget' that repo at C:\Repositories\ forever?

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• Customize ToolStripMenuItem

  - by Lu Lu

  Hello everyone, I want to customize ToolStripMenuItem by overriding OnPaint function. This is a MyToolStripMenuItem: public class MyToolStripMenuItem : ToolStripMenuItem { public MyToolStripMenuItem() :base() { } public MyToolStripMenuItem(string t) :base(t) { } protected override void OnPaint(PaintEventArgs e) { Graphics g = e.Graphics; Rectangle r = this.Bounds; g.FillRectangle(Brushes.Blue, r); g.DrawString(this.Text, this.Font, Brushes.Red, r); } } In my code, I will fill a blue color in item's bound. Now, I will create a list of items on menustrip: MyToolStripMenuItem1 |___MyToolStripMenuItem2 |___MyToolStripMenuItem3 I don't know why MyToolStripMenuItem3 don't have a blue background. This is my source code: http://www.mediafire.com/?2qhmjzzfzzn Please help me. Thanks.

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• 3 dimensional bin packing algorithms

  - by BuschnicK

  I'm faced with a 3 dimensional bin packing problem and am currently conducting some preliminary research as to which algorithms/heuristics are currently yielding the best results. Since the problem is NP hard I do not expect to find the optimal solution in every case, but I was wondering: 1) what are the best exact solvers? Branch and Bound? What problem instance sizes can I expect to solve with reasonable computing resources? 2) what are the best heuristic solvers? 3) What off-the-shelf solutions exist to conduct some experiments with?

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• Autofac in Asp.net mvc 2

  - by Joe

  I want/need to compile autofac with asp.net mvc 2 website. I want to step thru the source to see how it works. But here is my problem. The binaries for mvc dll is apparently bound for asp.net mvc 1. I am having trouble working out what the settings for the project file need to be for .Net 3.5 and asp.net mvc 2. one is the NET35 directive but I still get errors that out is not a type.

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• Best approch for creating Base control

  - by akjoshi

  Hi, I am looking for a solution for this scenario - I need to implement a feature to allow user to add various controls to canvas(WPF, custom and third party ) and then select any one of them and modify some properties in property grid(changes needs to be reflected in UI). I don't want to expose all the properties of any control only some of them(relevant to end user); apart from this there are some properties which will be common for all controls e.g. Title, Value(Value will be bound to some property of a control, say Text of TextBox and Content of Label) etc. I am thinking of putting all the common proeprties at one place. Things I am confused aout - How to create such base class, whether to use UserControl or Custom Control for this? How will the binding work between Control, base class proeprties and PropertyGrid? What type of object will I expose to property grid? Any idea on what approch should be followed in this case, any kind of input will really be helpful.

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• Accessing unbound DetailsView cell values when Detailsview DefaultMode is Edit

  - by Nickson

  i have a DetailsView that is populated by a Linq to Entities query. Example query is below. Dim Record = From L In db.MyRecords _ Where L.RecordID = 100 _ Select ID = L.RecordID, L.column1, L.column2, L.column3, L.column4 DetailsView2.DataSource = Record DetailsView2.DataBind() The defaultMode for the DetailsView is Edit. Now if this Detailsview was bound to a datasource control, i would convert a column to a templateColumn and programatically access cell values like so Dim NameTextBox As System.Web.UI.WebControls.TextBox = CType(DetailsView2.Rows(1).Cells(1).FindControl("TextBox1"), System.Web.UI.WebControls.TextBox) such that i can then say NameTextBox.Text to get the Name value. But the problem i have is, with this detailsview which is unbound, i have no column at design time to convert to a template, and yet i want to access its cell values. help is appreciated.

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• WPF Validation with ContentPresenter

  - by Chris

  Hi, I have a WPF user control which needs to validate some fields. It is bound to a class implementing IDataErrorInfo. When I set the user control as the content of my ContentPresenter in another, already open, window, I can see validation occurring, and error messages being returned, however, I don't get any validation adorner - e.g. the default red outline. If I enter the field and leave it (triggering re-validation) the validation adorner appears. Also, if I show the user control in it's own window it shows the validation adorner immediately. (I'm using Caliburn IResults to do this underneath, e.g. Show.Dialog<VM>(); but I suspect this isn't related) Can anyone offer any suggestion why the validation adorners aren't appearing immediately. (I had guessed animation on my ContentPresenter ContentChanged, however, I have removed this and still experience the problem. thanks, Chris

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• How can I stop Silverlight DataForm immediately saving changes back to underlying object?

  - by Simon_Weaver

  I have a Silverlight master-details DataForm where the DataForm represents a street address. When I edit the Address1 textbox, the value gets automatically committed to the bound Address object once focus leaves the textbox. If I hit the Cancel button, then any changes are undone because Address implements IEditableObject and saves its state. The problem is that since any change is immediately propagated to the underlying object it will be shown in the master grid before the user has actually hit Save. I also have other locations where this data is shown. This is not a very good user experience. I've tried OneWay binding but then I can't commit back without manually copying all the fields over. The only thing I can think of doing is to create a copy of the data first or using OneWay binding, but they both seem a little clumsy. Does DataForm support this way of working?

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• Changing the message (or exception) in WPF ValidatesOnException binding

  - by Emad

  I have a WPF application using MVVM. I am using binding to a POCO object. The Textbox is bound to a property in the object like: <TextBox.Text> <Binding Path="CertainProperty" Mode="TwoWay" > <Binding.ValidationRules> <ExceptionValidationRule/> </Binding.ValidationRules> </Binding> </TextBox.Text> Now this property is a a int property and when the user tried to enter a non-numeric value, they get the "input string was not in a correct format". What I need to do is customize this message to a more user friendly one. How can I do that ?

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• SPGridView current item in Sharepoint

  - by pistacchio

  Hi, I'm making a custom webpart. I takes some items from a list and display them with a SPGridView. I bound the fields like this: // Grab data from a SP List into dvwTickets SPGridView grdMyTickets = new SPGridView(); grdMyTickets.DataSource = dvwTickets; [..] BoundField colTicketTypology = new BoundField(); colTicketTypology.DataField = "ID"; colTicketTypology.HeaderText = ticketList.Fields.GetFieldByInternalName("ID").Title; grdMyTickets.Columns.Add(colTicketTypology); [..] This works. Now, what a grid does behind the scene when binding data to it is cycling through the binded data. How can I access the "Current Item" to make operations on each item while binding? Thanks

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• WPF Listbox - Empty List Display Message

  - by David Ward

  Can anyone suggest the best way to display a Textblock (with a text such as "List Empty") so that it's visibility is bound to the Items.Count. I have tried the following code and can't get it to work, so think that I must be doing it wrong. <ListBox x:Name="lstItems" ItemsSource="{Binding ListItems}"> </ListBox> <TextBlock Margin="4" FontStyle="Italic" FontSize="12" Text="List is empty" Visibility="Collapsed"> <TextBlock.Style> <Style TargetType="{x:Type TextBlock}"> <Style.Triggers> <DataTrigger Binding="{Binding ElementName=lstItems, Path=Items.Count}" Value="0"> <Setter Property="Visibility" Value="Visible" /> </DataTrigger> </Style.Triggers> </Style> </TextBlock.Style> </TextBlock>

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• Multiple comosite applications on same WSDL endpoint with OPEN-ESB

  - by Simon Thompson

  Just learning how Open-ESB (GlassFishESB) works and evaluating it for a project. One point I do not understand is that if I have a Composite application bound to an incoming web service (hosted on the glassfish server) can I get muple composite applications to consume this message ? If so is it done by A) simply deploying the multiple composite applications each referencing the save URL and same WSDL B) include each JBI module in the CASA editor and deploy a single composite application with all parts included (will this reduce scaling?) C) create a new composite application which has a BPEL process to send the in message to new endpoints for each compisite applciation . My feeling is that option A should work?

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• Silverlight chart with behavior/bitmap image tooltip passthrough

  - by isitdanny

  I have a chart showing bound data as tooltips and it works well. I have added a magnifier(set of behaviors class) that captures a bitmap image at two times scale that shows in a circular area over the hover spot. The tooltip does not display. I have tried a custom tooltip service but cannot bind it to the behaviors. I added the tooltip to the behavior class and got a tooltip and data but could not move it with the magnifier. It just sits in the middle and laughs. I added a usercontrol "tooltip"-same issues, could not hook it to the magnifier behavior. I know I can probably build a popup, but really wanted to just pass through the bitmap layer with the tootip. Any ideas would be greatly appreciated. Danny

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• Scala: How to combine parser combinators from different objects

  - by eed3si9n

  Given a family of objects that implement parser combinators, how do I combine the parsers? Since Parsers.Parser is an inner class, and in Scala inner classes are bound to the outer object, the story becomes slightly complicated. Here's an example that attempts to combine two parsers from different objects. import scala.util.parsing.combinator._ class BinaryParser extends JavaTokenParsers { def anyrep: Parser[Any] = rep(any) def any: Parser[Any] = zero | one def zero: Parser[Any] = "0" def one: Parser[Any] = "1" } object LongChainParser extends BinaryParser { def parser1: Parser[Any] = zero~zero~one~one } object ShortChainParser extends BinaryParser { def parser2: Parser[Any] = zero~zero } object ExampleParser extends BinaryParser { def parser: Parser[Any] = (LongChainParser.parser1 ||| ShortChainParser.parser2) ~ anyrep def main(args: Array[String]) { println(parseAll(parser, args(0) )) } } This results to the following error: <console>:11: error: type mismatch; found : ShortChainParser.Parser[Any] required: LongChainParser.Parser[?] def parser: Parser[Any] = (LongChainParser.parser1 ||| ShortChainParser.parser2) ~ anyrep I've found the solution to this problem already, but since it was brought up recently on scala-user ML (Problem injecting one parser into another), it's probably worth putting it here too.

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