WPF Discussion Boards

16-Sep-09 11:51

abiemann wrote:
I don't want to split up the hex value into single bytes. I feel that I shouldn't have to.

Sometimes, a programmer has to actually program. Sometimes, they have to do some basic things like conversion of numbers. Sometimes, they have to look up stuff like the Colors enum. Your two colors here are Color.Black and Color.Transparent ( as it's ARGB ).

Christian Graus

Driven to the arms of OSX by Vista.

Read my blog to find out how I've worked around bugs in Microsoft tools and frameworks.

Re: [Message Deleted]

abiemann16-Sep-09 14:00

abiemann

16-Sep-09 14:00

"Value of type 'System.Drawing.Brush' cannot be converted to 'System.Windows.Media.Brush'"

BAH!!

Re: [Message Deleted]

Christian Graus16-Sep-09 14:48

Re: how can I programmatically set control colors using hex values ?

16-Sep-09 14:48

Well, you need to explicitly scope it. I think if you want to use the build in ones, it's Brushes, not Brush, too. My bad.

I would agree that MS having objects of the same name in different namespaces is a PITA.

Christian Graus

Driven to the arms of OSX by Vista.

Read my blog to find out how I've worked around bugs in Microsoft tools and frameworks.

SOLUTION !

abiemann16-Sep-09 14:55

abiemann

16-Sep-09 14:55

I think I saw people doing this back in the VB6 days, here is the VB.Net version Poke tongue | ;-P

    Private Function ConvertHexToColor(ByVal strInput As String) As Color<br />
<br />
        strInput = strInput.Replace("#", "")<br />
<br />
        Dim alph As Integer = 0<br />
        Dim red As Integer = 0<br />
        Dim green As Integer = 0<br />
        Dim blue As Integer = 0<br />
        Dim colToReturn As Color = Color.FromRgb(red, green, blue) 'default if input is invalid<br />
<br />
        If (strInput.Length = 6) Then<br />
            'RRGGBB<br />
            red = Convert.ToInt32(strInput.Substring(0, 2), 16)<br />
            green = Convert.ToInt32(strInput.Substring(2, 2), 16)<br />
            blue = Convert.ToInt32(strInput.Substring(4, 2), 16)<br />
            colToReturn = Color.FromRgb(red, green, blue)<br />
        ElseIf (strInput.Length = 8) Then<br />
            'AARRGGBB<br />
            alph = Convert.ToInt32(strInput.Substring(0, 2), 16)<br />
            red = Convert.ToInt32(strInput.Substring(2, 2), 16)<br />
            green = Convert.ToInt32(strInput.Substring(4, 2), 16)<br />
            blue = Convert.ToInt32(strInput.Substring(6, 2), 16)<br />
            colToReturn = Color.FromArgb(alph, red, green, blue)<br />
        End If<br />
<br />
        Return colToReturn<br />
<br />
    End Function

to use:

<br />
Public MainMenu_Background As Brush<br />
MainMenu_Background = New SolidColorBrush(ConvertHexToColor("#FF000000")) 'Black<br />
myControl.Background = MainMenu_Background<br />

hopefully .Net 4.0 will see an improvement like this

Insincere Dave16-Sep-09 16:40

Insincere Dave

16-Sep-09 16:40

There is ColorConverter, which is the TypeConverter WPF uses.
this.Background = new SolidColorBrush((Color)ColorConverter.ConvertFromString("#00FF00"));

how to uncheck the select all checkbox if anyother checkboxes in unchecked...in WPF??

Krishna Aditya16-Sep-09 4:34

Krishna Aditya

16-Sep-09 4:34

Hi,
I have 3 check boxes.. 1.select all 2. team1, 3. team2.

If i check Select all , then all the 3 check boxes should be checked.

If I unselect team1 or team2 after i have checked selectall, then selectall should be unchecked and team1 and team2 still be checked.

--> on select all, all 3 should be checked..
--> on unchecking either team1 or team2 after checking select all, then select all shuld be unchecked.
--> individual checking is allowed.
I am able to do for the select all but not successful in the second half.

Please help me.
Thanks
Ramm

WPF Datagrid: How to change the DatagridColumnHeadersPresenter's Background property

Jacobus0115-Sep-09 22:22

Jacobus01

15-Sep-09 22:22

Hi,

Is there any way in which I can change this property without overwriting the entire control template. I've seen this done in some examples but I can't set the template for the DatagridColumnHeadersPresenter in my xaml file. I can access the headers and style them. I'm a bit new to control templates in wpf. Any help would be appreciated.

WPF Applications not running in various machines [URGENT - HELP]

Kunal Chowdhury «IN»15-Sep-09 18:46

Re: WPF Applications not running in various machines [URGENT - HELP]

15-Sep-09 18:46

Hi,

I am working on WPF 3.5 SP1 using Visual Studio 2008. My developed applications are not running on various machines which also has .Net 3.5 SP1. In some machines they are working fine & in others they failed to load.

I checked everything including code, but didn't find anything to resolve. Can anyone please help me asap to resolve the same issue? Your kind help is highly appreciated.

Regards,
- Kunal

Arun Jacob15-Sep-09 19:20

15-Sep-09 19:20

Try 2 log exception details or just check vats the exception.Otherwise how can u fix that?
Smile | :)

Re: WPF Applications not running in various machines [URGENT - HELP]

Christian Graus15-Sep-09 20:12

Re: WPF Applications not running in various machines [URGENT - HELP]

15-Sep-09 20:12

Not sure what specific help you expect here, except to point out the obvious - check the specs of the machines in question, check their video card drivers, tell us what error you get when they fail to load, etc.

Christian Graus

Driven to the arms of OSX by Vista.

Read my blog to find out how I've worked around bugs in Microsoft tools and frameworks.

Kunal Chowdhury «IN»15-Sep-09 23:22

Re: WPF Applications not running in various machines [URGENT - HELP]

15-Sep-09 23:22

Hi Chris,

After doing a deep debug, I came to know that, it is throwing "FileFormatException" for image: "The image format is unrecognized".

I am using gif/jpg/png formats. I also tried replacing the gif image with a new png image. In that case also, it is throwing the same exception & refuses to run. The image source is specified in the XAML in the following syntax: "images\myLogo.png"

FYI, it is working fine in my development PC & other PCs having Windows 7, but, it is refusing to run on Windows XP & Vista machines.

What could be the reason? Any idea???? Please HELP...

Regards,
- Kunal

Kunal Chowdhury «IN»16-Sep-09 1:38

Re: WPF Applications not running in various machines [URGENT - HELP]

16-Sep-09 1:38

I removed all the references to the images in my solution...
Still it is throwing the same error...

Any other way to check it???? Pls. help...

Regards,
- Kunal Chowdhury (My Blog)

Christian Graus16-Sep-09 11:54

Re: WPF Applications not running in various machines [URGENT - HELP]

16-Sep-09 11:54

All you can really do, is catch any exceptions at the top level. and write them to a log. You seem to have already worked out that it relates to what OS is being used, so the question becomes, what's present in one OS and not the other, and can you install it. Might updating an IE version help ? Might updating WMP help ? ( WPF apps will just crash in XP if you have not updated the version of Windows Media Player, with a pretty meaningless error message )

Christian Graus

Driven to the arms of OSX by Vista.

Read my blog to find out how I've worked around bugs in Microsoft tools and frameworks.

Kunal Chowdhury «IN»16-Sep-09 18:42

Re: WPF Applications not running in various machines [URGENT - HELP]

16-Sep-09 18:42

I checked the exception log but it is meaningless. It is only throwing bad image format exception.
I removed all the images & also the reference to the images from the xaml. Still it is there.
As the exception message is not proper, it is really very difficult to find the issue from that.

Is there any other way to find & resolve the same issue? I didn't find anything... Frown | :(

Regards,
- Kunal

Kunal Chowdhury «IN»16-Sep-09 19:16

Re: WPF Applications not running in various machines [SOLVED]

16-Sep-09 19:16

But Cris.... My other WPF programs are running fine on those machines. Only the said code is not running. To resolve it I created another project in VS2K8 & copied my code. That is also not working. I have not used any Windows7 reference, FYI. Please guide me....

Regards,
- Kunal

Kunal Chowdhury «IN»21-Sep-09 23:11

How to access UIElements attributes in a column of a datagrid [modified]

21-Sep-09 23:11

Chris,

That was due to different icon format. I changed the format from 4 bit to 8 bit BMP & now it is working fine...

Regards,
- Kunal Chowdhury (My Blog)

rizwan.saddal15-Sep-09 5:24

rizwan.saddal

15-Sep-09 5:24

Hi All,

I want to access a UIELEMENT timepicker's (which is in a datagrid column), IsEnabled attribute through C# code not the XAML.

for eaxmple a timepicker control is in the 8th column,

how can I do this

dataGrid1.Columns[8].timepicker.IsEnabled=false;

Any suugesstions?

modified on Wednesday, September 16, 2009 3:51 AM

WPF ListBox focus stupidity

Gary Wheeler15-Sep-09 4:23

Gary Wheeler

15-Sep-09 4:23

I've just discovered a bit of WPF ListBox stupidity. If you have a data-bound ListBox, and you set the SelectedItem programmatically, the item you picked is indeed the selected item when the control is displayed. If you use the keyboard to move the selection, however, you find out that the focus item is the first item in the control. On your keypress, the ListBox moves the selection to the first item in the control, rather than the item before/after the previously selected item. Dumb.

Fortunately, the fix is easy. In the Loaded() handler for the container of your ListBox, add the following:

private void _Loaded(object sender, RoutedEventArgs e)
{
    if (List.SelectedIndex >= 0)
    {
        ListBoxItem item = 
            (ListBoxItem)
            List.ItemContainerGenerator.ContainerFromIndex(List.SelectedIndex);
        item.Focus();
    }
    else
    {
        List.Focus();
    }
}

Note that the ListBox instance is named List in this example, and this code assumes that the ListBox has the focus when the window is loaded.

Software Zen: delete this;

How to fix components in a Drag & Drop canvas

Nekkantidivya14-Sep-09 22:09

Nekkantidivya

14-Sep-09 22:09

Hi,

I am working on a silver light application. In this I have a canvas on which I will drag and drop some components (which are usercontrols and displayed beside the canvas). After placing them on the canvas if I drag them they will move to desired location on the canvas. Here my problem is that if I drag them out of this canvas they are even moving out of the canvas. But I want these components to move only inside the canvas and they should not move out of this canvas.

If anyone have any idea to fix the components to move inside the canvas please reply me.

Thanks in advance.

Re: How to fix components in a Drag & Drop canvas

Arun Jacob15-Sep-09 2:01

15-Sep-09 2:01

If you are using Silverlight 3 use built in MouseDragElementBehavior for Dragging a control and set ConstrainToParentBounds to true.This is more easier than manual adjustment of left and top attributes inside a canvas. Smile | :)

Re: How to fix components in a Drag & Drop canvas

Nekkantidivya22-Sep-09 20:53

Nekkantidivya

22-Sep-09 20:53

Hi Arun Jacob,

Thanks for your reply.

I tried to implement this in my solution. I tried to set ConstrainToParentBounds to true for my usercontrols such that these usercontrols will not move out of the canvas when I place them on the canvas in the MainPage.xaml. But I am unable to get this property for my user control.

Please reply me how I have to set this property for a usercontrol.

Thanks in advance.

Silverlight SDK

CrazyCoder2614-Sep-09 19:43

CrazyCoder26

14-Sep-09 19:43

Hi I have Visual Studio Team System 2008..I want to develop Silverlight applications.Is it possible to install silverlight controls?If not what to do?

CC26

Re: Silverlight SDK

Arun Jacob14-Sep-09 20:28

14-Sep-09 20:28

CrazyCoder26 wrote:
Is it possible to install silverlight

Why not?
http://www.microsoft.com/Downloads/details.aspx?familyid=9442B0F2-7465-417A-88F3-5E7B5409E9DD&displaylang=en[^]
Smile | :)

Re: Silverlight SDK

CrazyCoder2614-Sep-09 20:40

CrazyCoder26

14-Sep-09 20:40

First of all Thank you so much for your reply..
I tried to install the same,but it asks for Visual Studio .Net 2008 SP1.While I have Visual Studio Team System 2008.

CC26

Re: Silverlight SDK

Arun Jacob14-Sep-09 20:48

14-Sep-09 20:48

Install Sp1.

http://www.microsoft.com/downloads/details.aspx?FamilyId=FBEE1648-7106-44A7-9649-6D9F6D58056E&displaylang=en[^]