Re: How to FindControls in ListView - WPF Discussion Boards

Re: Progress Bar Not Updating [SOLVED (kind of)]

5-Jun-09 12:47

Bindings have to have the right source, path, and target.

Don't know what to tell you....I posted a working example...

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

Raja.Lakshman3-Apr-10 18:08

Raja.Lakshman

3-Apr-10 18:08

Hi
I have posted an article in CodeProject at WPF WAIT PROGRESS BAR USING THREADING[^] - can you please check out and let me know if that helps in your scenario. Smile | :)

Thanks

Raja

Raja Lakshman

Progress Bar and the BackGroundWorker

Etienne_1235-Jun-09 2:25

Etienne_123

5-Jun-09 2:25

Hi
I have a treeview that gets populated with data. This treeview is on a seperate form that opens up when the app loads, from where the user selects something and after clicking okay he/she continues to the main screen. It takes about 20 seconds for the treeview to get filled, and while this is loading I want to display a progressbar. Is there a way to accomplish this with the BackGroundWorker?
Is there perhaps an easier way?

I also had a look at the Circular Progress Bar from one of Sascha Barber's posts on codeproject, if I can get that progress bar animating only when the treeview gets filled, then stopping again, that would also help a lot.

This is just to be fancy, it's not a requirement for the app I'm doing so I don't want to spend too much time with this.

Thanks in advance for any help

Re: Progress Bar and the BackGroundWorker

ABitSmart5-Jun-09 3:36

ABitSmart

5-Jun-09 3:36

Etienne_123 wrote:
s there a way to accomplish this with the BackGroundWorker

Did you have a look at this[^]?

Re: Progress Bar and the BackGroundWorker

Mark Salsbery5-Jun-09 6:15

How to FindControls in ListView

5-Jun-09 6:15

Etienne_123 wrote:
Is there a way to accomplish this with the BackGroundWorker?

Even the BackgroundWorker Class documentation[^] has sample code...

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

Glyn1235-Jun-09 1:25

Glyn123

5-Jun-09 1:25

Hi All,

I have a ListView populated from an Access table, with each ListView item displaying infromation with several TextBlocks.
I have also placed a CheckBox and TextBox in each item, to collect data from the user.

On a buton click, I would like to collect the value of the checkbox and textbox, and insert it into another table.
I have done similar things in the past using DataList in ASP1.1, but I cannot get WPF's ListControl to work in the same mannor.

Can somebody please send me some code snippets or point me to some good expamles?

Thanks,

Glyn

Pete O'Hanlon5-Jun-09 2:00

5-Jun-09 2:00

Change your thinking round so that you aren't considering the problem from how you get the data from the interface, as this is the wrong place to do it. Instead, think about using two-way binding to update your model, and save your changes from this.

What I would do is create a model that included a boolean field for the checkbox, and a string field for the textbox. When you bind your listview, set up these fields as binding targets using the standard Text="{Binding Path=..., Mode=TwoWay}" and IsChecked="{Binding Path=..., Mode=TwoWay}" syntax. You now have a simple mechanism for tackling this problem.

"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.

Glyn1235-Jun-09 4:03

Glyn123

5-Jun-09 4:03

Thanks for your reply Pete.

Could you please explain how to 'wire' this up properly, as I'm struggling!

In the XAML, I set the TextBox text binding to 'TestText'

<TextBox Name="TextBox1" Width="100" Text="{Binding Path=TestText, Mode=TwoWay}"></TextBox>

At the begining of the code behind, I declared and setup TestText:

Private _TestText As String

    Public Property TestText() As String
        Get
            Return _TestText
        End Get
        Set(ByVal value As String)
            _TestText = value
           
        End Set
    End Property

To test it, I used the following code to iterate through the ListView.

Private Sub BtnSubmitValues_Click(ByVal sender As Object, ByVal e As System.Windows.RoutedEventArgs) Handles BtnSubmitValues.Click

        Dim row As System.Data.DataRowView
        For Each row In ListView1.Items

            MsgBox(TestText)
        Next
    End Sub

The test was meant to produce a seperate message box (for each ListView item), containing the value of each TextBox.
The Message boxes were all blank.

What am I doing wrong?

Thanks

Pete O'Hanlon5-Jun-09 4:14

5-Jun-09 4:14

First of all, I'd implement INotifyPropertyChanged on your class if I were you. Raise the property changed notification in your setter.

"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.

Glyn1238-Jun-09 2:23

Glyn123

8-Jun-09 2:23

Hi,

I'm still struggling with this.

I posted the same question in another forum, where it was suggested that I use and ObservableCollection.
Which is the easiest method to implement?

Do you have any code snippets, or know of any similar examples?

Thanks

Pete O'Hanlon8-Jun-09 5:04

8-Jun-09 5:04

An ObservableCollection will only tell you that a collection changed (i.e. that items were added or deleted from it). It won't tell you what changed, and it won't tell you if an individual item changed. That's why you implement INotifyPropertyChanged in your classes.

"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.

Page turn in wpf 3d

AmirHossein.M.Ojvar4-Jun-09 20:50

AmirHossein.M.Ojvar

4-Jun-09 20:50

Hi there
i can't simulate a page turn in wpf and 3d environment..
(look like british library)

please help me to do it! Thumbs Up | :thumbsup:

Re: Page turn in wpf 3d

Pete O'Hanlon4-Jun-09 21:55

4-Jun-09 21:55

You could always use this[^].

"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.

Text and Image in header in listview

krishnan.s4-Jun-09 20:16

krishnan.s

4-Jun-09 20:16

Hi,

I need to display image and text together to the header in the Listview in wpf.Can u please let me know how to implement the same in wpf.

Thanks

Re: Text and Image in header in listview

Mark Salsbery4-Jun-09 21:14

Re: Text and Image in header in listview

4-Jun-09 21:14

krishnan.s wrote:
the header in the Listview

ListView does't have a header.

Are you referring to GridView? If so, you can set the HeaderTemplate on a GridViewColumn.

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

krishnan.s4-Jun-09 21:45

krishnan.s

4-Jun-09 21:45

Ya its the grid view iam referring too . Iam ale to display onlyone at a time , either text or image, Iam not getting how to display both together.Can u please let me know how to display both image and text in the single header cell.

Thanks

Re: Text and Image in header in listview

Mark Salsbery5-Jun-09 6:25

Binding problem: Set a source of a 'Source' property.

5-Jun-09 6:25

krishnan.s wrote:
Iam ale to display onlyone at a time , either text or image, Iam not getting how to display both together

Use a panel that can host more than one element. Here's an example
using a StackPanel:

<ListView x:Name="booksListView" ItemsSource="{Binding Source={StaticResource BooksData}, XPath=*}" >
    <ListView.View>
        <GridView AllowsColumnReorder="False" >
            <GridViewColumn Width="100" DisplayMemberBinding="{Binding XPath=@ISBN}" >
                <code><GridViewColumn.HeaderTemplate>
                    <DataTemplate>
                        <StackPanel Orientation="Horizontal">
                            <TextBlock Text="Header Text" />
                            <Image Source="images/Silverlight_Logo.jpg" />
                        </StackPanel>
                    </DataTemplate>
                </GridViewColumn.HeaderTemplate></code>
            </GridViewColumn>
            <GridViewColumn Header="Title" Width="140" DisplayMemberBinding="{Binding XPath=Title}" />
            <GridViewColumn Header="Summary" Width="140" DisplayMemberBinding="{Binding XPath=Summary}" />
            <GridViewColumn Header="Price" Width="35" DisplayMemberBinding="{Binding XPath=price}" />
            <GridViewColumn Header="Stock" Width="35" DisplayMemberBinding="{Binding XPath=@Stock}" />
        </GridView>
    </ListView.View>
</ListView>

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

Lutosław4-Jun-09 11:09

Re: Binding problem: Set a source of a 'Source' property.

4-Jun-09 11:09

I want to acquire a value for a Source property of XmlDataProvider from application settings.

<settings:Settings x:Key="settings" />
<XmlDataProvider x:Key="srcMenu" Source="{Binding Source={StaticResource settings}, Path = Default.MenuPath, Mode=OneTime}"
                 XPath="KorepetytorMenu/RootNode"/>

Unfortunately, it comes out that Source is not a dependancy property and thus it cannot be bound.

Any suggestions?

Greetings - Jacek Gajek

User 2710098-Jun-09 18:27

User 271009

8-Jun-09 18:27

Jacek,

You can assign it to an {x:Static local:AppSettings.MenuPath}. Then in your call using x:Static resolve the value from the settings file.

local above is a reference to your assembly.
AppSettings.MenuPath points to the below code.

Public Class AppSettings

Public Shared Property MenuPath as String
Get
Return (get the application setting and return it)
End Get

End Class

Cheers, Karl

» CodeProject 2008 MVP, CodeProject 2009 MVP

My Blog | Mole's Home Page |
XAML Power Toys Home Page

Just a grain of sand on the worlds beaches.

modified 27-Feb-21 21:01pm.

Re: Binding problem: Set a source of a 'Source' property.

Lutosław9-Jun-09 10:57

Re: Binding problem: Set a source of a 'Source' property.

9-Jun-09 10:57

Thanks for your reply.

I don't get it. I have created that wrapper AppSettings class you mentioned but I cannot get the XAML working.

<XmlDataProvider x:Key="srcMenu" Source="{x:Static local:AppSettings.MenuPath}" XPath="KorepetytorMenu/RootNode"/>

That doesn't even compile.
Could you explain it more please? Sorry for my newbie-ness.

Thanks in advance.

Greetings - Jacek Gajek

User 27100910-Jun-09 18:08

User 271009

10-Jun-09 18:08

Jacek,

Is the MenuPath property Shared (static in C#)

It must be for this syntax to work.

Cheers, Karl

» CodeProject 2008 MVP, CodeProject 2009 MVP

My Blog | Mole's Home Page |
XAML Power Toys Home Page

Just a grain of sand on the worlds beaches.

modified 27-Feb-21 21:01pm.

Re: Binding problem: Set a source of a 'Source' property.

Lutosław11-Jun-09 3:26

Re: Binding problem: Set a source of a 'Source' property.

11-Jun-09 3:26

I know that. The problem was another: the Source property is of Uri type not String.

public static class AppSettings
{
	public static Uri MenuPath
	{
		get
		{
			return new Uri(Settings.Default.MenuPath, UriKind.Relative);
		}
	}
}

I wonder why it doesn't allow using directly Settings.Default.MenuPath (with a proper String -> Uri converter). The Default property is static as well.

Greetings - Jacek Gajek

User 27100918-Jun-09 18:42

User 271009

18-Jun-09 18:42

I played with this some more and got the same results.

Suggest setting in code, reading the file location from the settings and setting the Source on load.

Cheers, Karl

» CodeProject 2008 MVP, CodeProject 2009 MVP

My Blog | Mole's Home Page |
XAML Power Toys Home Page

Just a grain of sand on the worlds beaches.

modified 27-Feb-21 21:01pm.

Re: Binding problem: Set a source of a 'Source' property.

Lutosław19-Jun-09 4:32