logo
down
shadow

WPF MVVM Databinding with parameters?


WPF MVVM Databinding with parameters?

By : Samiksha Pande
Date : November 22 2020, 12:01 PM
hope this fix your issue It calls out for a converter, no? So your binding would look like this:
code :
<DataGridTextColumn.Foreground>
    <SolidColorBrush Color="{Binding Converter={StaticResource hasChangedConverter}, ConverterParameter='ShipmentID'}"/>
</DataGridTextColumn.Foreground>
class HasChangedConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
    {
        var shipment = value as Shipment;
        var property = parameter as string;

        return shipment.HasChanged(property);
    }
}
<SolidColorBrush.Color>
    <Binding Converter="{StaticResource hasChangedConverter}" ConverterParameter="ShipmentID"/>
</SolidColorBrush.Color>
<DataGridTemplateColumn Header="ShipmentID">
    <DataGridTemplateColumn.CellTemplate>
        <DataTemplate>
            <TextBlock Text="{Binding ShipmentID}">
                <TextBlock.Background> 
                    <SolidColorBrush Color="{Binding Path=ShipmentID, Converter={StaticResource HasChangedConv}}"/>
                </TextBlock.Background>
            </TextBlock>
        </DataTemplate>
    </DataGridTemplateColumn.CellTemplate>
</DataGridTemplateColumn>


Share : facebook icon twitter icon
WPF Databinding and Styles with MVVM

WPF Databinding and Styles with MVVM


By : farjad
Date : March 29 2020, 07:55 AM
Any of those help I have a problem with databinding on a style in WPF. , I don't know why I didn't think of this earlier:
code :
<Style x:Key="{x:Type eo:Player}" TargetType="{x:Type eo:Player}">
        <Style.Triggers>
                <DataTrigger Binding="{Binding RelativeSource={RelativeSource Self}, Path=Team}" Value="A">
                        <Setter Property="Template" Value="{StaticResource TeamATemplate}"></Setter>
                </DataTrigger>
        </Style.Triggers>
</Style>
MVVM DataBinding

MVVM DataBinding


By : Shravani
Date : March 29 2020, 07:55 AM
should help you out EDIT: Binding the data against multiple textboxes
After reading your comment, I will elaborate my example for textboxes.
code :
<TextBox Text="{Binding ID, Mode=TwoWay}" />
<TextBox Text="{Binding SomeOtherData, Mode=TwoWay}" />
public class TestUserControlViewModel : BaseViewModel {
    private string id;
    private string someOtherData;

    public TestUserControlViewModel() {
        DataItem firstItem = new DataRepository().GetData().First();
        this.ID = firstItem.ID;
        this.SomeOtherData = firstItem.SomeOtherData;
    }

    public string ID {
        get {
            return this.id;
        }
        set {
            if (this.id == value) return;
            this.id = value;
            this.OnPropertyChangedEvent("ID");
        }
    }

    public string SomeOtherData {
        get {
            return this.someOtherData;
        }
        set {
            if (this.someOtherData == value) return;
            this.someOtherData = value;
            this.OnPropertyChangedEvent("SomeOtherData");
        }
    }
}
<ListView ... ItemsSource="{Binding GetAllData}" ... />
public class TestUserControlViewModel : BaseViewModel
    private ObservableCollection<DataItem> allData;

    public TestUserControlViewModel() {
         IGetTheData src = new DataRepository();
         this.allData = new ObservableCollection<DataItem>(src.GetData());
    }

    public ObservableCollection<DataItem> AllData {
        get {
            return this.allData;
        }
    }

    public void AddDataItem(DataItem item) {
        this.allData.Add(item);
    }
}
MVVM DataBinding

MVVM DataBinding


By : Chris
Date : March 29 2020, 07:55 AM
may help you . I have a ComboBox with the DataContext defined at application start to the appropriate ViewModel. I want to grab items from a XML file but have user selections bind to the ViewModel, and ultimately the model. , You are using;
code :
SelectionChanged="{Binding Path=DataContext.cbConnection_SelectionChanged}" 
<ComboBox x:Name="cbConnection"
          ItemsSource="{Binding Source={StaticResource XmlConnectionList}, XPath=//ComboItem}"
          DisplayMemberPath="Key"
          SelectedValuePath="Value"
          SelectedItem="{Binding Path=DataContext.cbConnectionSelectedItem}"
/>
Private _cbConnectionSelectedItem As XmlElement

Public Property cbConnectionSelectedItem As XmlElement
     Get
         Return _cbConnectionSelectedItem
     End Get
     Set(value As XmlElement)
         If value.Equals(_cbConnectionSelectedItem) = False Then
             _cbConnectionSelectedItem = value
             OnPropertyChanged("cbConnectionSelectedItem")
            End If
     End Set
End Property
<ComboBox x:Name="cbConnection"
              ItemsSource="{Binding Source={StaticResource XmlConnectionList}, XPath=//ComboItem}"
              DisplayMemberPath="Key"
              SelectedValuePath="Value"
              Text="{Binding Path=DataContext.cbConnectionText}"
    />
Private _cbConnectionText As String

Public Property cbConnectionText As String
     Get
         Return _cbConnectionText
     End Get
     Set(value As String)
         If value.Equals(_cbConnectionText) = False Then
             _cbConnectionText = value
             OnPropertyChanged("cbConnectionText")
            End If
     End Set
End Property
<ComboBox x:Name="cbConnection" 
    ItemsSource="{Binding Source={StaticResource XmlConnectionList}, XPath=//ComboItem}"
    DisplayMemberPath="@Key" 
    SelectedValuePath="@Value" 
    SelectedValue="{Binding Path=DataContext.cbConnectionValue}" />
Private _cbConnectionValue As String

Public Property cbConnectionValue As String
     Get
         Return _cbConnectionValue
     End Get
     Set(value As String)
         If value.Equals(_cbConnectionText) = False Then
             _cbConnectionValue = value
             OnPropertyChanged("cbConnectionValue")
            End If
     End Set
End Property
MVVM + Databinding

MVVM + Databinding


By : user1389069
Date : March 29 2020, 07:55 AM
help you fix your problem This is an interesting question and can have different possible answers but I will throw my opinion on the matter.
One way to look at ViewModels is to think of it as the 'model' of the view. In this way, you can be sure that your view would be very lean and dummy, which is ideal since they can be difficult, if not impossible, to test. And since VMs are also the layer between the view and the model, it is a perfect place to do data and type conversions. Benefits include testability (as I said, it is difficult to validate conversion logic in XML) and better maintainability (if for some reason you have to change your view in the future).
MVVM without DataBinding

MVVM without DataBinding


By : AlexoFalco
Date : March 29 2020, 07:55 AM
wish of those help I started learning Kotlin to develop Android applications and for my first project I have to use MVVM as pattern to separate the presentation layer from the logic. All the articles I've found about MVVM use DataBinding library to bind the data of the models directly to the xml views. I worked a little with DataBinding in Java but I doesn't like it because it is very difficult to find errors when binding is wrong. My questions is if there is another way to use MVVM without DataBinding? , Sure it is. Just abstract example: imagine ViewModel:
code :
class SomeViewModel : ViewModel() {

    private lateinit var roadmap: RoleScreenRoadmap
    private lateinit var uiScope: CoroutineScope

    private val _nameRequired = MutableLiveData<Boolean>()
    private val _userName = MutableLiveData<String>()

    val nameRequired: LiveData<Boolean>
        get() = _nameRequired
    val userName: LiveData<String>
        get() = _userName

    ...
}
class AbstractActivity : AppCompatActivity() {

    private lateinit var viewModel: RoleScreenViewModel

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_some)
        initializeDependencies()
        performBindings()
    }

    private fun initializeDependencies() {
        viewModel = ViewModelProviders.of(this).get(AbstractViewModel::class.java)
    }



    private fun performBindings() {
        val lifecycle = ::getLifecycle
        viewModel.nameRequired.observe(lifecycle) { nameRequired: Boolean? ->
            if (nameRequired!!) {
                showNameInputWindow()
            }
        }
        viewModel.userName.observe(lifecycle, ::setTitle)
    }

    ...
}
Related Posts Related Posts :
  • Replace a # character with a space and a # character
  • DataGrid SelectedItem and CurrentItem on row change and on loosing focus
  • Parse Json to class with C#
  • Publish .exe with Visual Studio Mac
  • c# out causing a no overload for method error?
  • Which Thread resume the method execution after await in Asp.net Web application
  • How to open Asp.Net project in another computer
  • Azure app registrations - SQL Server permission for C# App
  • How to Submit String with 536000 Characters to API
  • Server side TcpClient's stream.read gets no data when a different client (connected to the same port) sends data
  • Add combo-box in windows form grid view by using LINQ query
  • Remove XLL addin when multiple XLL addins are installed
  • Deserialize dynamic json into generic .NET object
  • How to search node in Jobject
  • Iron Webscraper connects to host but doesn't scrape?
  • Change values from textbox at the touch of a button
  • Data access structure with Entity Framework
  • Link Assemblys failed unexpectedly (Xamarin.ios.dll)
  • ASP.NET Core Razor pages - not binding on POST Request
  • How to update appsettings.json from wix custom actions with the values passed as parameter during command line installat
  • Load undefined images from folders
  • How to add a new button in title bar next the minimize button in UWP?
  • Missing DLL in docker image after copying published tree inside
  • One of the identified items was in an invalid format
  • TLS1.2 does not exist with .NET v4.7
  • How do I parse a XML document into object models?
  • Why is a conditional style being set on a html element by Razor is always html encoded incorrectly
  • Counting the amount of repetitions a letter has in a string
  • How to get the encoding of a file in a repository git via C#?
  • Communication between an Azure web application and a windows form app on Azure VM
  • WCF Service - Client receiving CommunicationException after many requests to localhost
  • How to correctly view pdf in browser using DotVVM?
  • Reading part of json into c# object
  • YoutubeAPI v3 - Setting thumbnail returns Completed status, but no thumbnail is set on video
  • Using the SimpleInjector, is it possible to get a singleton by its implementation type?
  • Why the LogLevel rule is not set for my NLog?
  • Converting short? to TimeSpan
  • Publish build artifact through build.cake instead of Azure Devops
  • Unable to get new token using JWT method (C#)
  • Running HttpRequest synchronously C#
  • How to avoid format in "XDocument.Parse(strHtml)"
  • How to update naviation property with new values in EF Core?
  • Queued function not executing with dequeue
  • How to Control Sequence of columns automatically Generated in DataGrid
  • Getting error when try to add a file from library to main project?
  • Aggregate Roots DDD/UoW/Repo/Service
  • How to change the horizontal movement direction of the player in Unity2D?
  • Getting a two dimensional array of all possible unique combination of numbers lower than a mixmum for each cell starting
  • How to get LDAP nested groups from attribute
  • Get array consisting of first values of a list of tuples
  • How do I pass information from my View to my Controller as a Parameter
  • UWP BarcodeScanner Preview: CaptureElement doesn't show any Preview
  • How to register open generic with custom factory method?
  • Change image via in scriptable object in Unity
  • Decreasing value of one float when other go up
  • Xceed CheckComboBox not properly showing selected values from items hardcoded in XAML
  • Why does char array display contents on console while string and int arrays dont in c#?
  • How to prevent custom filters twice calls?
  • c#: remove brackets of certain size if existing including its content
  • Is there a simple way of handling nested Dictionary<string, object> types where object is either string or another
  • shadow
    Privacy Policy - Terms - Contact Us © festivalmusicasacra.org