Re: UserControl Databinding - WPF Discussion Boards

3-May-09 3:14

I give up, can't find any good information about this anywhere Frown | :(

I have a UserControl with 6 textboxes. I have a quite complex datastructure from where I want to fill these textboxes. The datastructure contains several sets of "String[6]" but I can't figure out how to bind it Frown | :(

public partial class MyAttBox : UserControl
{
        // 6 of these with different names
        public static DependencyProperty LowChRXProperty = DependencyProperty.Register("LowChRX", typeof(String), typeof(MyAttBox));
        public String LowChRX
        {
            get { return (String)GetValue(LowChRXProperty); }
            set { SetValue(LowChRXProperty, value); }
        }
}

"main" XAML:

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

my data is stored like:

public class ABC
    {
        private Dictionary<String, List<String>> m_values = new Dictionary<String, List<String>>();

        public Dictionary<String, List<String>> Values
        {
            get { return m_values; }
            set { m_values = value; }
        }

What I want to is to select a Key in my code and connect the Values to the texboxes in my UC. How?

Mark Salsbery3-May-09 8:31

3-May-09 8:31

I'm confused...

mikla521 wrote:
The datastructure contains several sets of "String[6]" but I can't figure out how to bind it

Then why didn't you show these "sets of "String[6]""?? Smile | :)

The 6 textboxes....you want to bind those by index to 6 strings in a collection, right?

And that collection of 6 strings - where is that? Is that the List<> in each dictionary entry?

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

mikla5213-May-09 9:08

3-May-09 9:08

Ok, will try refine myself here Smile | :)

public class CouplerDB
    {
        private Dictionary<String, Coupler> m_products;
        ....
    }

public class Coupler
    {
        private Dictionary<String, Attenuation> m_attenuations
        ....
     }

public class Attenuation
   {
       private Dictionary<Band, List<String>> m_values = new Dictionary<Band, List<String>>();

I want my user control textboxes to display the values from the List<String>
but it's not absolute necessary to have that list, just a place to store 6 different value.

Scenario: In a listbox I can select a product. Radiobuttons to select Coupler. Then I have a UserControl for each Band which I want to display the corresponding Strings. Clear? Big Grin | :-D

*Sigh*
If I change Coupler I need to change the binding.
Another way to do it is to hardcode everything, but then I need almost 60 UserControls with a total of 360 Textboxes! My way I "only" need maximum 10 UserControls...

Mark Salsbery3-May-09 9:40

3-May-09 9:40

mikla521 wrote:
Clear?

No.

mikla521 wrote:
Radiobuttons to select Coupler

Select a coupler from where? You only show one coupler per product in the m_products dictionary.

How do you know how many radiobuttons there should be?

Are any of these dictionaries fixed count? Which ones?

It loks on the outside like a (relatively) simple 3-level master-detatil scenario.
I just want to try to put together a sample for you and it would be easiest
if I know and understand the data you're working with Smile | :)

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

mikla5213-May-09 10:25

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 | :)

mikla5213-May-09 21:04

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 | :)

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.

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

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>

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

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

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]

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