ListView (with GridView) - Bound to Observable Collection [modified] - WPF Discussion Boards

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Re: UserControl Databinding

mikla5213-May-09 10:25

mikla521

3-May-09 10:25

I will try again Smile | :)

A listbox where I can select product, nothing strange here.
Then a Tab with 6 radiobuttons to select Coupler and in that same Tab I have my UserControls.
So when I change selectedItem in my listbox OR change radiobutton, I need to update my UserControls with new data.
ONE of the UserControls in my XAML looks like:

<AttBox:MyAttBox Header="GSM 850" x:Name="AttBox_GSM850"/>

In my code I have (don't care about the private members now, let's say they are public Smile | :)

public CouplerDB myDB = new CouplerDB

When I want to change in the UC I get the values from:

Product p = (Product)productListbox.SelectedItem;
myDB.m_products[p.ProductName].m_attenuations["Cable"].Values[Band.GSM850][0]
myDB.m_products[p.ProductName].m_attenuations["Cable"].Values[Band.GSM850][1]...

so I can set

AttBox_GSM850.LowChRX = myDB.m_products[p.ProductName].m_attenuations["Cable"].Values[Band.GSM850][0];

But to simplify things here... If I have ONE and only ONE UC. I want a Dictionary where each KEY selects, i.e a List<String> to populate the UC listboxes, also want TwoWayBinding. Ehh..I have a testproject, where can I post it? Smile | :)

Re: UserControl Databinding

mikla5213-May-09 21:04

mikla521

3-May-09 21:04

Been trying around a little...
If my data object looks like:

public class MyData : INotifyPropertyChanged
{
   private String m_LowChRX;
   private String m_LowChTX;

   public String LowChRX
   {
       get { return m_LowChRX; }
       set { m_LowChRX = value; OnPropertyChanged("LowChRX"); }
   }
   public String LowChTX
   {
       get { return m_LowChTX; }
       set { m_LowChTX = value; OnPropertyChanged("LowChTX"); }
   }...

In my code I can set the data values in

MyData myData1;

And use binding like this

binding = new Binding("LowChRX");
binding.Source = myData1;
myBox.tbLowChRX.SetBinding(TextBox.TextProperty, binding);

where myBox is my UC. And, again, I have 6 textboxes in myBox. Then I have to repeat that binding for each textbox. And here is the point where I change from myData1 to other data objects.
If I have a List<String> in my UC, how do I bind it? When then TextBox is a Control, maybe I have to make a custom control inside which hold my List? So I can bind like:

myBox.CustomControl.SetBinding(Property, binding)

Am I on the right track now? Smile | :)

Re: UserControl Databinding

Kunal Chowdhury «IN»13-May-09 20:42

Kunal Chowdhury «IN»

13-May-09 20:42

You can use Binding with the DependencyProperty.
You can get information on how to implement the DependencyProperty in this blog:
How to Implement a DependencyProperty?

Try with that. It will work.

Re: UserControl Databinding

Gideon Engelberth4-May-09 3:24

Gideon Engelberth

4-May-09 3:24

WPF gives you a couple options here. I'll just show them in XAML and let you decide what you want and translate to code-behind if you want. All of these examples assume you have an object of type ABC as the DataContext.

Option A - Bind to a specific list with a known key:

<ListBox ItemsSource="{Binding Values[KeyToGetItems]}" />

Option B - Bind to the entire list with another set of controls for the current item:

<Grid>
    <Grid.RowDefinitions>
        <RowDefinition Height="*" />
        <RowDefinition Height="*" />
    </Grid.RowDefinitions>
    
    <ListBox Name="lstValues" ItemsSource="{Binding Values}">
        <ListBox.ItemTemplate>
            <DataTemplate>
                <TextBlock Text="{Binding Key}" />
            </DataTemplate>
        </ListBox.ItemTemplate>
    </ListBox>

    <StackPanel Grid.Row="1" ItemsSource="{Binding SelectedItem.Value, ElementName=lstValues}">
        <!-- other controls here -->            
    </StackPanel>
</Grid>

How to read images in a single image file (.png format)

seshu4code2-May-09 23:58

seshu4code

2-May-09 23:58

Hi All,

I have seen an application which will change the non client area of any windows using in my system. and the application is cristalxp theme.

Now my doubt is along with the application he gave few images which are in png format, Here I would like to expain on image

He has close button image which is simmilar to Vista Close button and in the same image it self he has five more images i.e
one for maximised mouse over,
one for maximised mouse leave,
one for minimized mouse over,
one for minimized mouse leave,

when ever i do some event on the cloe button rexpective image is getting loaded.

I felt that is wow single image with multiple images and loading respectivly.

If some know this logic will you please let me know.

Thanks and Regards
Seshu

Re: How to read images in a single image file (.png format)

Mark Salsbery3-May-09 8:47

Mark Salsbery

3-May-09 8:47

I'm not sure what you're asking here, but AFAIK, there's no support
in PNG for multiple frames in a single image.

The BitmapFrame class can be used as an ImageSource for individual frames
in a multi-frame image if the format supports it (TIFF and GIF in WPF).

So....what are you asking?

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Re: How to read images in a single image file (.png format)

seshu4code6-May-09 23:49

seshu4code

6-May-09 23:49

Hi Mark,

Even I read the same in many forums but Recently i have downloaded an application as such and just as i could upload those images i couldnt show you here.

Any how thanks for your reply and i will get back on this once after having any idea in this regards

<b>Thanks </b>
Seshu

ListView (with GridView) - Bound to Observable Collection [modified]

b4ip2-May-09 19:56

b4ip

2-May-09 19:56

Overview
WPF Project (VS 2008)

I'm using a ListView (with GridView) bound to an ObservableCollection. The collection includes a DateTime field.
When I populate the collection, the DateNR field is often null, but then the ListView displays a date of "01-Jan-01"!!

How do I stop this as I don't want the user to see a date when there shouldn't be one. I need the DateNR field in the collection to be a DateTime value not a string because this column is used for sorting.

Any ideas would be welcome. thanks

<br />
        public class RecordData<br />
        {<br />
            public int ID { get; set; }<br />
            public DateTime DateNR { get; set; }<br />
        }<br />

The GridView column for 'DateNR' is specified as follows:

<br />
        GridViewColumnHeader gvch = new GridViewColumnHeader();<br />
        GridViewColumn gvc = new GridViewColumn();<br />
        Binding bind = new Binding("DateNR");<br />
        bind.Converter = new FormattingConverter();<br />
        bind.ConverterParameter = @"{0:dd-MMM-yy}";<br />
        gvc.Width = 80;<br />
        gvc.DisplayMemberBinding = bind;<br />
        gvch.Content = "NR Date";<br />
        gvc.Header = gvch;<br />
        myGridView.Columns.Add(gvc);<br />

<br />
        SqlConnection sqlConn = new SqlConnection(myConnectionString);<br />
        SqlCommand sqlComm = new SqlCommand("...", sqlConn);<br />
        SqlDataReader sqlDR = sqlComm.ExecuteReader();<br />
        // ...<br />
        RecordData rd = new RecordData();<br />
        rd.ID = sqlDR.GetInt32(0);<br />
        if (sqlDR.IsDBNull(1) == false)<br />
            rd.DateNR = sqlDR.GetDateTime(1);<br />
        // ...<br />
       _MyCollection.Add(rd);<br />

modified on Saturday, September 19, 2009 5:46 AM

WPF and XNA physic engines !

Mohammad Dayyan2-May-09 12:06

Mohammad Dayyan

2-May-09 12:06

Hi all.

Can we use XNA physic engines in WPF (2D) ? Is it possible ?

Thanks.

VS2008's inability to update service references [modified]

Ravi Bhavnani2-May-09 9:30

Ravi Bhavnani

2-May-09 9:30

I almost never write strongly worded posts, but I feel this one is warranted. So I'll go out on a limb and say:

VS2008's ability to reliably update service references in a Silverlight class library project is little more than a crap shoot. The feature is hopelessly broken and has all the appeal of a steaming pile of horse manure. It's a waste of my time to have to exit Visual Studio, reboot, pray or do all of the above in the hope that the reference will actually be imported correctly this time.

Microsoft, if you want developers to seriously consider using Silverlight, I urge you to release a hotfix that addesses this problem. It would be faster to rearchitect our enterprise application's front end in Flash than continue wasting valuable time trying (in vain) to get this to work.

Mad | :mad:

/ravi

Update: Bug 439157[^] filed.

My new year resolution: 2048 x 1536
Home | Articles | My .NET bits | Freeware
ravib(at)ravib(dot)com

modified on Saturday, May 2, 2009 5:01 PM

Re: VS2008's inability to update service references

Mark Salsbery4-May-09 9:59

Mark Salsbery

4-May-09 9:59

Thanks for filing a bug on Connect!!

I was going to recommend you do that Smile | :)

Also, this is a Visual Studio issue, not a Silverlight issue, so this was
the wrong board to post on Poke tongue | ;-P

Cheers,
Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Re: VS2008's inability to update service references

Ravi Bhavnani4-May-09 10:01

Ravi Bhavnani

4-May-09 10:01

Mark Salsbery wrote:
Also, this is a Visual Studio issue, not a Silverlight issue,

OK, but it only affects adding a service reference to a Silverlight assembly.

/ravi

My new year resolution: 2048 x 1536
Home | Articles | My .NET bits | Freeware
ravib(at)ravib(dot)com

Re: VS2008's inability to update service references

Ravi Bhavnani4-May-09 18:17

Ravi Bhavnani

4-May-09 18:17

FYI, I've managed to repro the badness and have tracked down what I believe is the offending situation. I'll update the bug report when I have cycles.

/ravi

My new year resolution: 2048 x 1536
Home | Articles | My .NET bits | Freeware
ravib(at)ravib(dot)com

Reading items into a TreeView from an ACCESS database

Etienne_1232-May-09 3:35

Etienne_123

2-May-09 3:35

Can anyone tell me how to fill a TreeView with items from an Access database in WPF? I've already added my data source; Data >> Add New Data Source in Visual Studio 2008. So my dataset and table adapters are all set up already, just need to get the data into the TreeView. Here's an example of what my tree structure looks like:

>Parts
>Tables
>Top
>Leg
>Chairs
>Seat
>Leg
>Backrest

Table Top, Leg, etc are stored in a 'Parts' table, from which I want to read data.

Re: Reading items into a TreeView from an ACCESS database

Pete O'Hanlon2-May-09 9:57

Pete O'Hanlon

2-May-09 9:57

This[^] should help.

"WPF has many lovers. It's a veritable porn star!" - Josh Smith

As Braveheart once said, "You can take our freedom but you'll never take our Hobnobs!" - Martin Hughes.

My blog | My articles | MoXAML PowerToys | Onyx

UserControl question

RugbyLeague1-May-09 4:54

RugbyLeague

1-May-09 4:54

How do I create a UserControl which can host other controls? For example, say I wanted to create a UserControl which showed an orange border but could have other controls hosted inside it so:

<my:OrangeBorderThing>
<TextBlock>hello</TextBlock>
</my:OrangeBorderThing>

would show the word "hello" surrounded by an orange border - currentlly I just get the word hello - I have spent a couple of hours reading the usual conflicting things google brings up, messed about with ControlTemplate and ContentPresenter etc but have gotten nowhere.

Re: UserControl question

AghaKhan1-May-09 5:32

AghaKhan

1-May-09 5:32

<Window x:Class="Wpf2.Window1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:Wpf2"
Title="Window1" Height="300" Width="300">
<Grid>
<local:UserControl1 />
</Grid>
</Window>

<UserControl x:Class="Wpf2.UserControl1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Height="100" Width="200">
<Grid>
<Border BorderBrush="red" BorderThickness="2">
<TextBlock Text="Hello" />
</Border>
</Grid>
</UserControl>

It woks for me. Poke tongue | ;-P

Best regards
Agha Khan

Re: UserControl question

#realJSOP1-May-09 5:34

#realJSOP

1-May-09 5:34

That's not the way it works. What you want is a Style that has your border settings in it, like this:

<Style TargetType="{x:Type Border}" x:Key="MyBorder">
        <Setter Property="Background" Value="#E7E3ED" />
        <Setter Property="BorderBrush" Value="Black" />
        <Setter Property="BorderThickness" Value="1" />
        <Setter Property="CornerRadius" Value="8,8,8,8" />
    </Style>

and then do this in your UserControl:

<Border Margin="0,31,0,0" Width="222" Height="32" HorizontalAlignment="Left"
           VerticalAlignment="Top" Style="{DynamicResource UDPBorder}">
    <TextBlock>Hello</TextBlock>
</Border>

"Why don't you tie a kerosene-soaked rag around your ankles so the ants won't climb up and eat your candy ass..." - Dale Earnhardt, 1997
-----
"...the staggering layers of obscenity in your statement make it a work of art on so many levels." - Jason Jystad, 10/26/2001

Re: UserControl question

RugbyLeague1-May-09 5:38

RugbyLeague

1-May-09 5:38

The TextBlock with the content=Hello is just as an example - it could be a grid with lots of other controls inside it. Basicaly I want to write a control that can host other controls. Maybe I am not explaining myself very well - having spent a while on this, tapping random stuff into Google, any sense of what it is I wanted and how to express it has probably been lost.

I think a lot of the problem with this stuff is years ago if you wanted to know what a keyword did in a programming language and how to use it you would look it up in the manual. These days programming language keywords are of little consequence, it's all about the libraries but if you don't know what to look for where exactly do you look?

Re: UserControl question

AghaKhan1-May-09 6:01

AghaKhan

1-May-09 6:01

Dear John Simmons / outlaw programmer:
Would you please kind enough to look a problem which I posted? All necessary code is there to build the application.
Is this bug is in animation?
Best regards
Agha Big Grin | :-D

Re: UserControl question

Gideon Engelberth1-May-09 6:03

Gideon Engelberth

1-May-09 6:03

A better question would be if you even need to make a UserControl. The built in Border control is capable of holding a control as is. If all you are trying to do is have a way to make orange borders, you should just define a style like John suggested and apply it to any borders you want to be orange.

<StackPanel>
  <Border Style="{StaticResource OrangeBorderStyle}">
    <TextBlock>Hello</TextBlock>
  </Border>
  <Border Style="{StaticResource OrangeBorderStyle}">
    <Grid>
      <!-- your controls here -->
    </Grid>
  </Border>
</StackPanel>