Questions on UI for WPF Forum

1 answer

126 views

Hello,

i am using q3 version of wpf controls. I am finding a weird behaviour- when i group flds, horizontal and vertical scroll bar disappears.

Please let me know if i am missing anything here or is it a bug?

Regards,
Sandy

i have set these properties:

ScrollViewer.HorizontalScrollBarVisibility

="Visible" ScrollViewer.VerticalScrollBarVisibility="Visible"

ScrollViewer.CanContentScroll="True"

and this is grouped event handler:

private void WipGrid_Grouping(object sender, GridViewGroupingEventArgs e)

{

try

{

var countFunction = new CountFunction();

countFunction.Caption =

"Total records: ";

countFunction.FunctionName =

"Count";

e.GroupDescriptor.AggregateFunctions.Add(countFunction);

}

GridView

answered on 06 Jan 2010

1 answer

149 views

Binding problems custom class

Hi all,

I'm trying to use a List of custom class to fill the itemsSource of RadCarousel.

This is the code of Page1.xaml:

    
            <Page x:Class="Page1" 
        
                xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
        
                xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
        
                xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation" 
        
                xmlns:carousel="clr-namespace:Telerik.Windows.Controls.Carousel;assembly=Telerik.Windows.Controls.Navigation" 
        
                Title="Page1"> 
        
                <Grid> 
        
                    <telerik:RadCarousel x:Name="carPacientes" HorizontalAlignment="Stretch" 
        
                            VerticalAlignment="Stretch" Background="Black" AutoGenerateDataPresenters="False" Foreground="White"> 
        
                        <telerik:RadCarousel.Resources> 
        
                            <Style TargetType="telerik:CarouselItem"> 
        
                                <Setter Property="Template"> 
        
                                    <Setter.Value> 
        
                                        <ControlTemplate TargetType="telerik:CarouselItem"> 
        
                                            <Label Content="{Binding Path=Apellidos}" FontSize="12" Foreground="Black" Background="Aqua" /> 
        
                                        </ControlTemplate> 
        
                                    </Setter.Value> 
        
                                </Setter> 
        
                            </Style> 
        
                        </telerik:RadCarousel.Resources> 
        
                    </telerik:RadCarousel> 
        
                </Grid> 
        
            </Page>

And this is the code to fill the RadCarousel Page1.xaml.vb:

    
            Imports MDOL.Business.Logic 
        
            Partial Public Class Page1 
        
                Public Shared opcion As String 
        
                Public Sub New() 
        
                    InitializeComponent() 
        
                    Dim pacs As List(Of Paciente) = New List(Of Paciente) 
        
                    Dim pac As Paciente = Nothing 
        
                    For i = 1 To 10 
        
                        pac = New Paciente 
        
                        pac.IdPaciente = Convert.ToString(i) 
        
                        pac.Nombre = "Gerard" 
        
                        pac.Apellidos = "Subirana" 
        
                        pacs.Add(pac) 
        
                        pac = Nothing 
        
                    Next 
        
                    Me.carPacientes.ItemsSource = pacs 
        
                End Sub 
        
            End Class

When I run the application appears 10 radcarousel items but the labels with the property Apellidos still empty... what's wrong?

Thank's in advance.

Gerard

Carousel

answered on 06 Jan 2010

3 answers

440 views

[Solved] 2D Pie Chart Sample Code

Hi Can anyone please guide me to a creating a simple pie chart with legend in the code behind in C# or have some code.

Basically I have a datatable which returns the following data and would like to draw a pei chart:

Exercise Type A: 30
Exercise Type B : 60
Exercise Type C : 10

All the examples I have seen so far is for bar graphs.

Many Thanks
shahab

Chart

answered on 06 Jan 2010

7 answers

349 views

[Solved] Scroll delay

Hello,
I'm evaluating the GridView by writing a small app to test it.
In the app I'm using 2 grids: the RadGridView on one side of the view and Xceed's DataGridControl on the other.
Both grid's ItemsSource have the same instance of ObservableCollection<Order> (from NW db) that is set from the code behind.

One thing that is immidiately noticable, even with a small amount of records (100),
is when scrolling vertically - the RadGridView seems to take a while to update the view (compared to Xceed's grid).
whether if I drag the scroller up and down or if I click on it to perform a big scroll step.

My XAML for the RadGridView looks like this:

<telerik:RadGridView
    telerik:StyleManager.Theme="Vista"
    IsReadOnly="True"
    ScrollMode="RealTime" />

Is this a known behavior or am I missing something?
Is there a way to fix this?

Thanks,
David

GridView

answered on 06 Jan 2010

5 answers

386 views

Binding to generic lists

I'm trying to bind the gridview to an ObservableCollection<MyListItem>. In my collection I have a mixture of items that inherit from MyListItem e.g. MyAppleItem and MyOrangeItem. Fields bound in the grid are bound to properties exposed in the base MyListItem type. The binding works fine when the colleciton contains a list with a single type in it but as soon as I have a collection with some MyAppleItem and MyOrangeItem I get an argument exception:

{"The value \"MyAppleItem\" is not of type \"MyOrangeItem\" and cannot be used in this generic collection.\r\nParameter name: value"}

I need the items in their original types as I use a converter on one of the columns etc. How do I make use of polymorphism with the grid binding?

GridView

answered on 06 Jan 2010

1 answer

259 views

[Solved] Ignore Columns for Copy to Clipboard

Hi

I have a RadGridView containing some "command"- columns and some information columns.

Like this:

Name Adress IsOnline Edit Delete

John Anystreet 10a Yes [Button] [Button]

When i copy a Column to Clipboard the two "command"-columns are copied too.

How can i change the grid that these columns are ignored when the row is copied?

GridView

answered on 05 Jan 2010

5 answers

241 views

Binding Heterogeneous Data with RADTreeView

Hi,

I am using RADTreeview and I would like to bind the heterogeneous data as the hierarchal structure. For e.g. I want to bind List<A> which has List<B> and List<C> as its children.

Regards,
-Kshama

TreeView

answered on 05 Jan 2010

1 answer

79 views

[Solved] Saving grid data upon form close

What is the best way to handle this situation?

I have a master grid and its child data is accessed through the RowDetailsTemplate which is pointing to a customized UserControl. Inside the UserControl is a tab control with a grid inside each tab. When a child grid is in edit mode and the form is closed, the grid's rowEditEnded event doesn't fire. The rowEditEnded event is where I tell my program to post/save the row's data.

So, how am I suppose to save the data of that row? Should I expose a function of the user control and have the WPF call it when closing?

Thank You.

GridView

answered on 05 Jan 2010

3 answers

175 views

Programmatically Scrolling Grid

Hello,

I was trying to figure out how to programmatically scroll the grid but the documentation on this site and on the Net did not help much. I finally figured it out. I have this code in the TextChanged event of a textbox so when the user types in some text this code is executed and the first line in the grid that contains the text in the textbox is scrolled too.

Here's my solution:

int numRows = gridname.Items.Count;

for (int i = 0; i < numRows; i++)

if (gridname.Items[i].ToString().Contains(<Text to look for goes in here>)

{

this.gridname.ScrollIntoView(gridname.Items[i]);

break;

}

My grid only contains 1 column.

GridView

answered on 04 Jan 2010

3 answers

219 views

[Solved] Use .png files as tree node Icons

I have the following hierarchy structure

Item (object)
- List<Item>Children (property)
- ItemType (property)

ItemType (object)
- ImageSource Icon (property)

My Icons are stored as .png resource files. So, I can't load them directly. Instead, I need to convert them from a Bitmap over to a BitmapSource. They can then be used as the Icon (ImageSource).

Question is, does anyone have a good way in managed code to do this conversion? I currently do this using interop but I would think there is a better way. My current conversion method:

    
                    public static BitmapSource LoadBitmap(Bitmap source)  
        
                    {  
        
                        return System.Windows.Interop.Imaging.CreateBitmapSourceFromHBitmap(  
        
                            source.GetHbitmap(),  
        
                            IntPtr.Zero, Int32Rect.Empty,  
        
                            System.Windows.Media.Imaging.BitmapSizeOptions.FromEmptyOptions());  
        
                    }

TreeView

answered on 04 Jan 2010