WPF Discussion Boards

dbrenth13-Sep-10 3:32

13-Sep-10 3:32

KeyUp is essentially identical to KeyDown except for when the event is triggered. There is still no way to tell that the user pressed the period, question mark, etc. keys.

Brent

Re: How to detect the pressed key?

Abhinav S13-Sep-10 5:04

Abhinav S

13-Sep-10 5:04

Can this [^]thread be of any assistance to you?

The funniest thing about this particular signature is that by the time you realise it doesn't say anything it's too late to stop reading it.

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Re: How to detect the pressed key?

dbrenth13-Sep-10 5:19

dbrenth

13-Sep-10 5:19

I read this and all of the side posts before posting my question. I read it again. It seems that Microsoft can't understand why anyone would need to type in something besides letters and numbers - or try to prevent a user from typing any garbage they want. I suppose that is too heavy for a silverlight application.

I was just hoping someone here had come up with a work-around.

Brent

Brent

setting visibility of label in wpf

sumit703410-Sep-10 0:42

sumit7034

10-Sep-10 0:42

hi I am binding label through
<Label Content="{Binding Path=OrderDetails.OrderPaymentId}" FontSize="20">

now i want if the value of OrderDetails.OrderPaymentId=0

then the visibility of label become collapsed

please help how to do this using style or trigger

Re: setting visibility of label in wpf

#realJSOP10-Sep-10 1:33

#realJSOP

10-Sep-10 1:33

You need to create a value converter class, and bind the Visibility property to it in your xaml.

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Re: setting visibility of label in wpf

sumit703410-Sep-10 1:55

sumit7034

10-Sep-10 1:55

<Label.Style>
<Style>
<Style.Triggers>
<DataTrigger
Binding="{Binding Path=OrdeDetails.OrderPaymentId}" Value="0">
<Setter Property="Label.Visibility" Value="Collapsed"></Setter>
</DataTrigger>
</Style.Triggers>
</Style>
</Label.Style>

Re: setting visibility of label in wpf

Ian Shlasko10-Sep-10 2:36

Ian Shlasko

10-Sep-10 2:36

Or, like John said, write a value converter...

1) Create a class that inherits from IValueConverter

2) Implement the Convert function such that it returns Visibility.Collapsed for 0, or Visibility.Visible for anything else.

3) Create an instance of that class in your resources section in the XAML, and give it a key

4) Reference it in the binding:
{Binding OrderDetails.OrderPaymentId,Converter={StaticResource MyConverter}}

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Re: setting visibility of label in wpf

devvvy18-Sep-11 17:27

devvvy

18-Sep-11 17:27

Converter works:

XML

<UserControl.Resources>
        <BooleanToVisibilityConverter x:Key="MyBooleanToVisibilityConverter" />
    </UserControl.Resources>

...

XML

<Button Name="btnSomeButton" HorizontalAlignment="Left" Grid.Row="0" Grid.Column="0" Click="btnSomeButton_Click" Width="40px" Height="40px" Visibility="{Binding Path=bIsVisible, ElementName=SomeControl, Mode=TwoWay}" >
                <Image Source="..\Icons\SomeIcon.jpeg" ToolTip="SomeButton" />
            </Button>

In above example, bIsVisible is a simple CLR property of type Boolean.

But as with any other "Enum", you do NOT need a converter, you could have binded a property of type "System.Windows.Visibility" directly to your control:

XML

<Button Name="btnSomeCmd" HorizontalAlignment="Left" Grid.Row="0" Grid.Column="3" Click="btnSomeCommand_Click" Width="40px" Height="40px" Visibility="{Binding Path=SomeButtonVisibility, ElementName=SomeControl, Mode=TwoWay, diagnostics:PresentationTraceSources.TraceLevel=High}" >
                <Image Source="..\Icons\...; ToolTip="SomeCommand" />
            </Button>

In above example, SomeButtonVisibility is a dependency property of type System.Windows.Visibility. I used a Dependency Property as supposed to a common CLR property only because I want take advantage of "Two Way" notification.

dev

Re: setting visibility of label in wpf

Kunal Chowdhury «IN»10-Sep-10 16:59

Kunal Chowdhury «IN»

10-Sep-10 16:59

You can try both the Solution given above. Both are perfect answer.

Appreciate you for Voting Up my Articles & Forum posts. Mark as Answer if this post Answered your query.

Entery key functionality in WPF textbox

Hema Bairavan9-Sep-10 20:30

Hema Bairavan

9-Sep-10 20:30

Hi All,

I have a wpf text box in which i am unable to press enter key, if i press its not doing anything,, actually i need if the user press enter button a new line should be inserted but its not happening..

do i need to do that in the Keydown event (finding the key pressed is enter)
or is there any other way. Please let me know.

Thanks in advance

Re: Entery key functionality in WPF textbox

Kubajzz9-Sep-10 21:14

Kubajzz

9-Sep-10 21:14

Make sure the AcceptsReturn property of your textbox is set to true.

Re: Entery key functionality in WPF textbox

Hema Bairavan9-Sep-10 21:24

Hema Bairavan

9-Sep-10 21:24

Thanks Mr Kubajzz for your time and for your help.

I didnt set that property when i set that it works fine.
Thanks again

Re: Entery key functionality in WPF textbox

Kubajzz9-Sep-10 21:40

Kubajzz

9-Sep-10 21:40

You are welcome!

Help with building a gantt-like chart for research data

mtproc9-Sep-10 8:57

mtproc

9-Sep-10 8:57

I am trying to build a sideways scrolling chart using SilverLight 3. I want to display multiple pieces of data that span a set of numerical values; however, the values are not parallel as they are in a bar chart that has a standard base value for each piece of data. Think of it as a Gantt chart with the top scale being zipcodes and the data being cities that contain the zipcodes. The data would be represented as a horizontal bar that spans a set of zipcodes. I actually looked into modifying a Gantt chart; however, since its primary function is to display data over a period of time, I am not certain if it will work.

Can anybody point me in a possible direction to solve my problem?

Using C# in SilverLight 3

Thanks for your time.

Re: Help with building a gantt-like chart for research data

mtproc13-Sep-10 8:32

mtproc

13-Sep-10 8:32

Do I need to add more information to make my needs a bit more clear?

How can we add toggle button in silverlight grid column?

amit_839-Sep-10 0:06

amit_83

9-Sep-10 0:06

How can we add toggle button in silverlight grid column?

Re: How can we add toggle button in silverlight grid column?

Abhinav S9-Sep-10 0:29

Abhinav S

9-Sep-10 0:29

How control the location and size of the page when i using wpf navigation ?

Yanshof8-Sep-10 21:06

Yanshof

8-Sep-10 21:06

My application using 'Pages' and i using wpf navigation to navigate between the pages.

I cant to control the page size and the page location on the screen and i don't know how - because i don't see that there is option to setup the page container.

I see that the page himself has the edit option of width and height - but i want that the size will be as 'auto' mode - and i want to have the ability to use 'auto' of the size change ( case the user will change the page container size => the page size will be change automatically also )

Show position of a chartingToolkit:LineDataPoint in a collection

surfluds7-Sep-10 22:02

surfluds

7-Sep-10 22:02

I have set up the following tooltip to show the x and y values of datapoints within a WPF linechart, what I would also like to do is show the index within the collection that the point uses. How do I show this please?

<Style x:Key="ToolTipDataPointStyle" TargetType="chartingToolkit:LineDataPoint">
            <Setter Property="Background" Value="Green"/>
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="chartingToolkit:LineDataPoint">
                        <Grid x:Name="Root" Opacity="1">
                            <ToolTipService.ToolTip>
                                <StackPanel Margin="2,2,2,2">
                                    <ContentControl Content="{Binding HoleSize}"  ContentStringFormat="Hole Size: {0}" />
                                    <ContentControl Content="{Binding PulseWidth}"  ContentStringFormat="Pulse Width: {0}"/>
                                    <!--<ContentControl Content="{Binding Path.[0]}"  ContentStringFormat="Data = {0}"/>-->
                                </StackPanel>
                            </ToolTipService.ToolTip>
                            <Ellipse StrokeThickness="{TemplateBinding BorderThickness}" Stroke="{TemplateBinding BorderBrush}" Fill="{TemplateBinding Background}"/>
                        </Grid>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>

Re: Show position of a chartingToolkit:LineDataPoint in a collection

PumbaPumba27-Sep-10 8:04

PumbaPumba

27-Sep-10 8:04

Hi surfluds,

May be this link could help you.
http://endofstream.com/charts-creating-custom-style-for-linedatapoint/

n00b - pointer please

Dalek Dave7-Sep-10 9:15

Dalek Dave

7-Sep-10 9:15

I fancy expanding my Very Limited knowledge and would appreciate a link to an Idiots Guide in order to have a play around and maybe make a few basic attempts at prettiness.

Recommendations?

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Re: n00b - pointer please

Pete O'Hanlon7-Sep-10 9:22