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I have a requirement to crop an image in oval shape and save the cropped image.Can anyone provide some useful links or a working solution.Appreciate an early response.Enviornment is VS 2010 & Silverlight 4 or above.
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While this[^] project just uses a cropped rectangle, it should be easy enough to translate it to include a cropped oval.
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I have an Address entity:
public class AddressEntity : _EntityBase
{
public AddressTypeEntity AddressType { get; set; }
public string Street1 { get; set; }
public string Street2 { get; set; }
public string City { get; set; }
public string State { get; set; }
public string ZipCode { get; set; }
public bool IsPrimary { get; set; }
public string DisplayValue { get; set; }
}
On the Address Edit dialod I have a combo box of AddressTypes. It's bound to an ObservableCollection of AddressTypeEntity. I can see the address types when I drop down the list.
Here's the AddressTypeEntity
public class AddressTypeEntity : _EntityBase
{
public string Caption { get; set; }
}
Pretty simple so far.
The problem is that the Caption is not showing in the drop down. Here's the XAML for the combobox:
<ComboBox x:Name="Types"
Grid.Row="2"
Grid.Column="1"
ItemsSource="{Binding AddressTypes}"
SelectedItem="{Binding SelectedAddressType, Mode=TwoWay}"
Margin="5,0,0,0"
VerticalAlignment="Center"
HorizontalAlignment="Left"
FontFamily="Segoe UI"
FontSize="14"
Foreground="DarkSlateGray"
Width="140">
<ComboBox.ItemTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal">
<TextBlock Text="{Binding Address.AddressType.Caption}"/>
</StackPanel>
</DataTemplate>
</ComboBox.ItemTemplate>
</ComboBox>
I'm pretty sure that the problem is in the template, I just can't see what I'm doing wrong.
Anyone?
If it's not broken, fix it until it is
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Your collection is of AddressTypeEntity? If it is, you don't need to bind to Address (this entity has no idean what these properties are). Just bind to AddressType.Caption.
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I'm trying to sync the combobox's selected item to the address type on the address entity.
AddressType is not a property on the ViewModel. It's on the AddressEntity.
If it's not broken, fix it until it is
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If you are going to post code classes, then throw us a bone and at least post the right code classes. How on earth could we guess this based on your original posting?
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I figured it out.
1) Set the bindng to just Caption.
2) In the VM I did:
private void loadAddress()
{
Street1 = Address.Street1;
Street2 = Address.Street2;
City = Address.City;
State = Address.State;
ZipCode = Address.ZipCode;
var addressType = (from at in AddressTypes
where at.Id == Address.AddressType.Id
select at).FirstOrDefault();
SelectedAddressType = addressType;
}
I was hoping to do it just with bindings, but this works.
If it's not broken, fix it until it is
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I have a TreeView Control populated by a Public Property in a ViewModel:
<TreeView HorizontalAlignment="Stretch" Margin="5" Name="TreeView1"
VerticalAlignment="Stretch" Grid.Row="2"
ItemsSource="{Binding Path=AssetTree.FirstGen}">
<TreeView.ItemContainerStyle>
<Style TargetType="{x:Type TreeViewItem}">
<Setter Property="IsExpanded" Value="{Binding IsExpanded., Mode=TwoWay}"/>
<Setter Property="IsSelected" Value="{Binding IsSelected, Mode=TwoWay}"/>
<Setter Property="FontWeight" Value="Normal"/>
<Style.Triggers>
<Trigger Property="IsSelected" Value="True">
<Setter Property="FontWeight" Value="Bold"/>
</Trigger>
</Style.Triggers>
</Style>
</TreeView.ItemContainerStyle>
<TreeView.ItemTemplate>
<HierarchicalDataTemplate ItemsSource="{Binding Children}">
<StackPanel Orientation="Horizontal">
<Image Source="/MMS.Modules.Maintenance;component/Images/Tooling.png" Height="20"/>
<TextBlock Text="{Binding Code}"/>
</StackPanel>
</HierarchicalDataTemplate>
</TreeView.ItemTemplate>
</TreeView>
How do I bind the Image control to a property of the child collection? e.g. the Category property?
Do I use a converter for this?
I don't speak Idiot - please talk slowly and clearly
"I have sexdaily. I mean dyslexia. Fcuk!"
Driven to the arms of Heineken by the wife
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Same way you are with Code. You don't need a converter, just return the ImageSource from the VM.
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I need to change my groupbox visibility and I should be able to get those controls in the groupbox1 ,when I change my combobox value in the combobox selectionchange event groupbox2 and its controls should be shown..
line by line execution shows the result i was looking but finally am not able to get the output .
This is what I have tried but didn't work for me. Need ur help.
if(stringgp1=="group1")
{
groupbox1.Visibility=Visibility.Visible;
groupbox2.visibility=visibility.hidden;
}
else(something...){}
karthik
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Try this sample, its not working in the code behind like your example code, but insted relys on styles bindings and triggers to achieve what you are after.
<StackPanel>
<ComboBox Name="Options">
<sys:String>One</sys:String>
<sys:String>Two</sys:String>
</ComboBox>
<GroupBox Header="One">
<GroupBox.Style>
<Style TargetType="GroupBox">
<Setter Property="Visibility" Value="Collapsed"/>
<Style.Triggers>
<DataTrigger Binding="{Binding ElementName=Options, Path=SelectedItem}" Value="One">
<Setter Property="Visibility" Value="Visible"/>
</DataTrigger>
</Style.Triggers>
</Style>
</GroupBox.Style>
</GroupBox>
<GroupBox Header="Two">
<GroupBox.Style>
<Style TargetType="GroupBox">
<Setter Property="Visibility" Value="Collapsed"/>
<Style.Triggers>
<DataTrigger Binding="{Binding ElementName=Options, Path=SelectedItem}" Value="Two">
<Setter Property="Visibility" Value="Visible"/>
</DataTrigger>
</Style.Triggers>
</Style>
</GroupBox.Style>
</GroupBox>
</StackPanel>
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Thanks for ur reply but i have so many items in combobox by which groupbox visibily will depend.. nearly 10 items in combobox
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Same sample but with three optins in the combo box working on visibility of two group boxes.
<StackPanel>
<ComboBox Name="Options">
<sys:String>One</sys:String>
<sys:String>Two</sys:String>
<sys:String>Three</sys:String>
</ComboBox>
<GroupBox Header="OneOrThree">
<GroupBox.Style>
<Style TargetType="GroupBox">
<Setter Property="Visibility" Value="Collapsed"/>
<Style.Triggers>
<DataTrigger Binding="{Binding ElementName=Options, Path=SelectedItem}" Value="One">
<Setter Property="Visibility" Value="Visible"/>
</DataTrigger>
<DataTrigger Binding="{Binding ElementName=Options, Path=SelectedItem}" Value="Three">
<Setter Property="Visibility" Value="Visible"/>
</DataTrigger>
</Style.Triggers>
</Style>
</GroupBox.Style>
</GroupBox>
<GroupBox Header="Two">
<GroupBox.Style>
<Style TargetType="GroupBox">
<Setter Property="Visibility" Value="Collapsed"/>
<Style.Triggers>
<DataTrigger Binding="{Binding ElementName=Options, Path=SelectedItem}" Value="Two">
<Setter Property="Visibility" Value="Visible"/>
</DataTrigger>
</Style.Triggers>
</Style>
</GroupBox.Style>
</GroupBox>
</StackPanel>
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ok Thank you but my form contains so many groupboxes which will be changed as per selecting the combo items.. I appreciate your help. 
Any other method of writing it in codebehind by using a switch case will be helpful.
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It is worth noting that the resources can be placed in different places, and the are in scope in any elements below where they are created, also they can be kept out of the way in resource dictionarys. Hopefully one of these solutions will work for you even if it is the code behind one.
<StackPanel>
<StackPanel.Resources>
<Style TargetType="GroupBox" x:Key="OneAndThree">
<Setter Property="Visibility" Value="Collapsed"/>
<Style.Triggers>
<DataTrigger Binding="{Binding ElementName=Options, Path=SelectedItem}" Value="One">
<Setter Property="Visibility" Value="Visible"/>
</DataTrigger>
<DataTrigger Binding="{Binding ElementName=Options, Path=SelectedItem}" Value="Three">
<Setter Property="Visibility" Value="Visible"/>
</DataTrigger>
</Style.Triggers>
</Style>
<Style TargetType="GroupBox" x:Key="Two">
<Setter Property="Visibility" Value="Collapsed"/>
<Style.Triggers>
<DataTrigger Binding="{Binding ElementName=Options, Path=SelectedItem}" Value="Two">
<Setter Property="Visibility" Value="Visible"/>
</DataTrigger>
</Style.Triggers>
</Style>
</StackPanel.Resources>
<ComboBox Name="Options">
<sys:String>One</sys:String>
<sys:String>Two</sys:String>
<sys:String>Three</sys:String>
</ComboBox>
<GroupBox Name="group1" Header="OneOrThree" Style="{StaticResource OneAndThree}">
</GroupBox>
<GroupBox Name="group2" Header="Two" Style="{StaticResource Two}">
</GroupBox>
</StackPanel>
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if you are set on doing this in the code behind then i think i will need a better sample or your code to help you. The following is working for me:
<StackPanel>
<ComboBox Name="Options" SelectionChanged="SelectionChanged">
<sys:String>One</sys:String>
<sys:String>Two</sys:String>
<sys:String>Three</sys:String>
</ComboBox>
<GroupBox Name="group1" Header="OneOrThree">
</GroupBox>
<GroupBox Name="group2" Header="Two">
</GroupBox>
</StackPanel>
private void SelectionChanged(object sender, SelectionChangedEventArgs e)
{
var selected = (sender as ComboBox).SelectedItem as String;
switch (selected)
{
case "One":
group1.Visibility = Visibility.Visible;
group2.Visibility = Visibility.Collapsed;
break;
case "Two":
group1.Visibility = Visibility.Collapsed;
group2.Visibility = Visibility.Visible;
break;
case "Three":
group1.Visibility = Visibility.Visible;
group2.Visibility = Visibility.Collapsed;
break;
default:
group1.Visibility = Visibility.Collapsed;
group2.Visibility = Visibility.Collapsed;
break;
}
}
It would be worth throwing some checks in on the (sender as ComboBox) etc incase you call the event from the wrong place but i'll leave that to you to sort out
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thank u .. i will try and reply u
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should I set all the groupboxes visible or hidden in pageload ?
I have taken grid inside the groupboxes and arranged my controls like textboxes..
If I make groupboxes visible in pageload then while debugging it is showing all the controls in Groupboxes but combo selection change event not working.
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have you put a break point in to check that the SelectionChanged Event is being triggered and passed through to the event handler?
If you don't set the vivibility explicitly in the PageLoad is the combo box working as expected?
I'm not able to reproduce your problem here at all from the information you have provided, so include the WPF where you decalre your combo box, page load event and at least one group box. also include the code for your selection chanage event handler and page load event handler.
Or send me your project via email(my profile > right click homepage >copy link location) email address is there for a short while.
modified 9-Aug-12 8:32am.
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Hi everyone,
This is Sunil here. I am trying to find a job in WPF field having 1 Years of experience. But, i have some basic knowledge of WPF, actually my field was in Win-forms. But, nowadays WPF is future oriented technology, so i want to build carrier in WPF. I have some basic knowledge in Data-binding, animation, styles and templates etc. I have to know which framework is more required by software companies in MVVM among Prism, MVVM Light, Cliburn. I have basic practical knowledge in MVVM light framework. It's very simple to implement as compare to Prism. So, friends, Please guide me which framework should i read regarding Job in a S/W company? Any other link for that?
Thanks and Regards:
Sunil Paul,
9718629366
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I already answered this question here[^]. Please post your question in one forum only.
One of these days I'm going to think of a really clever signature.
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When I change an item in an ObservableCollection, how do I update the UI?
I have an ObservableCollection of AddressEntity.
When I change an street on an item in the collection, the UI doesn't reflect it.
If it's not broken, fix it until it is
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The ObservableCollection effectively just updates the UI when items are added, removed, moved, etc. If you want to update the UI based on a change to the property then you have to raise the change notification on that property (via INotifyPropertyChanged).
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You mean implement INotifyPropertyChanged in the AdressEntity?
If it's not broken, fix it until it is
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Yes. That's how WPF receives information that only a particular property has changed (don't forget that the BindingMode has to be considered here as well). The BindingMode tells WPF which direction change notification goes.
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