I have that show/hide pass feature and it works just fine. One of my views ilustrated below has a security code that effect is also applied on Entry Text that has property 'IsEnabled=False'. Right now when I click on an eye nothing happens.
Is there any way to get it working when text entry is not enabled?
<StackLayout Grid.Row="1" IsVisible="{Binding IsPINSectionVisible}">
<Label
Style="{StaticResource MessageLabelStyle}"
Text="{i18n:Translate Pin_Text}">
</Label>
</StackLayout>
<StackLayout Grid.Row="2" IsVisible="{Binding IsPINSectionVisible}">
<Entry Text="{Binding PIN.Value, Mode=TwoWay}"
IsEnabled="False"
IsPassword="True"
Placeholder="{i18n:Translate Pin_Title}">
<Entry.Style>
<OnPlatform x:TypeArguments="Style"
Android="{StaticResource EntryStyle}" />
</Entry.Style>
<Entry.Behaviors>
<behaviors:EventToCommandBehavior
EventName="TextChanged"
Command="{Binding ValidatePINCommand}" />
</Entry.Behaviors>
<Entry.Effects>
<effects:ShowHidePassEffect />
</Entry.Effects>
<Entry.Triggers>
<DataTrigger
TargetType="Entry"
Binding="{Binding PIN.IsValid}"
Value="False">
<Setter Property="behaviors:LineColorBehavior.LineColor"
Value="{StaticResource ErrorColor}" />
<Setter Property="Entry.PlaceholderColor"
Value="{StaticResource ErrorColor}" />
</DataTrigger>
</Entry.Triggers>
</Entry>
And Android Effect class:
public class ShowHidePassEffect : PlatformEffect
{
protected override void OnAttached()
{
ConfigureControl();
}
protected override void OnDetached()
{
}
private void ConfigureControl()
{
EditText editText = ((EditText)Control);
editText.SetCompoundDrawablesRelativeWithIntrinsicBounds(0, 0, Resource.Drawable.pass_show_24, 0);
editText.SetOnTouchListener(new OnDrawableTouchListener());
}
}
public class OnDrawableTouchListener : Java.Lang.Object, Android.Views.View.IOnTouchListener
{
public bool OnTouch(Android.Views.View v, MotionEvent e)
{
if (v is EditText && e.Action == MotionEventActions.Up)
{
EditText editText = (EditText)v;
if (e.RawX >= (editText.Right - editText.GetCompoundDrawables()[2].Bounds.Width()))
{
if (editText.TransformationMethod == null)
{
editText.TransformationMethod = PasswordTransformationMethod.Instance;
editText.SetCompoundDrawablesRelativeWithIntrinsicBounds(0, 0, Resource.Drawable.pass_show_24, 0);
}
else
{
editText.TransformationMethod = null;
editText.SetCompoundDrawablesRelativeWithIntrinsicBounds(0, 0, Resource.Drawable.pass_hide_24, 0);
}
return true;
}
}
return false;
}
}
And picture to ilustrate the view:
Related
I would like to bind an Entry with a Slider and vice versa. I wrote something like this:
<Entry x:Name="myEntry" Text="{Binding Value, Mode=TwoWay}" BindingContext="{x:Reference slider}"/>
<Slider x:Name="slider" Maximum="100" Minimum="0" BindingContext="{x:Reference myEntry}"/>
When I use the slider, the value in the entry is updated, but when I put manually some value in the Entry, the value append a 0 or change to 0. What can be the problem. I am working on android.
You should bind both your Slider and Entry to string/ integer in a backing View Model.
class MyViewModel
{
private int _sliderValue;
public string EntryText
{
get => _sliderValue.ToString();
set => SetProperty(ref _sliderValue, int.Parse(value) );
}
public int SliderValue
{
get => _sliderValue;
set => (ref _sliderValue, value);
}
}
And in the view
<Entry Text="{Binding EntryText}" />
<Slider Value="{Binding SliderValue}" />
More MVVM Info
Fresh MVVM for Xamarin
Caliburn Micro for Xamarin
please refer the following xaml code
<Frame HorizontalOptions="FillAndExpand" VerticalOptions="StartAndExpand">
<StackLayout>
<Entry Text="{Binding Path=Value}"
FontSize="18"
x:Name="label"
BindingContext="{x:Reference Name=slider}"/>
<Slider x:Name="slider"
Maximum="1500"
VerticalOptions="CenterAndExpand" />
</StackLayout>
</Frame>
The same can be achieved by using the view model please refer the code
Xaml
<Frame HorizontalOptions="FillAndExpand" VerticalOptions="StartAndExpand">
<StackLayout>
<Entry x:Name="NameEntry" Placeholder="Enter Name" Text="{Binding Forename,Mode=TwoWay}" />
<Slider Value="{Binding Forename}" Minimum="0" Maximum="10"/>
</StackLayout>
</Frame>
------------------- now see the model in a c# file-----------------------------------
public partial class MainPage : ContentPage
{
public class DetailsViewModel : INotifyPropertyChanged
{
int forename;
public int Forename
{
get
{
return forename;
}
set
{
if (forename != value)
{
forename = value;
OnPropertyChanged ("Forename");
}
}
}
protected virtual void OnPropertyChanged(string propertyName)
{
var changed = PropertyChanged;
if (changed != null)
{
PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
}
}
public event PropertyChangedEventHandler PropertyChanged;
}
public MainPage()
{
InitializeComponent();
BindingContext = new DetailsViewModel();
}
}
I am new in MVVVM so please forgive me if it is stupid question. I am using this example http://www.codeproject.com/Articles/36848/WPF-Image-Pixel-Color-Picker-Element and included there library to get color of indicated by user pixel of image. it looks nice and dipsalys in rectangle selected color but i neeed to bind the selecteed value to viewmodel.
here is my xaml code:
<Window x:Class="MovieEditor.View.PixelSelector"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:ctrls="clr-namespace:ColorPickerControls;assembly=ColorPickerControls"
xmlns:local="clr-namespace:MovieEditor.MVVMCommon"
Title="FilterDesigner" Height="550" Width="550"
Icon="..\Resources\Images\icon.ico"
xmlns:VM="clr-namespace:MovieEditor.ViewModel">
<Window.DataContext>
<VM:PixelSelectorVM/>
</Window.DataContext>
<Window.Resources>
<local:ColorToBrushConverter x:Key="ColorToBrushConverter"/>
</Window.Resources>
<Grid Background="#FF191919" >
<DockPanel>
<Grid Margin="10,10,10,1">
<Grid.RowDefinitions>
<RowDefinition/>
<RowDefinition Height="Auto" MinHeight="38"/>
</Grid.RowDefinitions>
<Border BorderBrush="White" BorderThickness="5" Margin="0,39,0,11">
<ctrls:ImageColorPicker Binding.XmlNamespaceManager="{Binding p PixelSelectorVM.MyImageColorPicker, UpdateSourceTrigger=PropertyChanged}"
x:Name="image" Source ="{Binding Frame}" Margin="0,36,0,0"
/>
</Border>
<Border Width="77"
HorizontalAlignment="Center"
BorderBrush="White" BorderThickness="1" Margin="263,2,182,435">
<Rectangle Fill="{Binding ElementName=image, Path=SelectedColor,
Converter={StaticResource ColorToBrushConverter}}" RenderTransformOrigin="0.549,0.429" Margin="1"/>
</Border>
<Button Content="Save" Command="{Binding Save}" Margin="165,0,0,4" Grid.Row="1" HorizontalAlignment="Left" Width="60"/>
<Label Content="Selected pixel color:" HorizontalAlignment="Left" Height="18" Margin="140,11,0,0" VerticalAlignment="Top" Width="110"/>
<Button Content="Cancel" Command="{Binding Cancel}" Margin="0,1,165,4" HorizontalAlignment="Right" Width="60" RenderTransformOrigin="0.5,0.5" Grid.Row="1">
</Button>
</Grid>
</DockPanel>
</Grid>
</Window>
</code>
And here is my view model:
public class PixelSelectorVM : ViewModelBase
{
private BitmapImage frame;
public MainWindowVM parentMainWindowVM;
private ImageColorPicker imageColorPicker;
public ImageColorPicker MyImageColorPicker
{
get
{
return this.imageColorPicker;
}
set
{
this.imageColorPicker = value;
OnPropertyChanged("MyImageColorPicker");
}
}
public BitmapImage Frame
{
get
{
return this.frame;
}
set
{
this.frame = value;
OnPropertyChanged("Frame");
}
}
public PixelSelectorVM(BitmapImage image, MainWindowVM mainWindowVM)
{
this.frame = image;
this.parentMainWindowVM = mainWindowVM;
this.imageColorPicker = new ImageColorPicker();
this.imageColorPicker.Source = image;
}
public PixelSelectorVM() { }
public ICommand Save
{
get
{
return new RelayCommand(SaveExecute);
}
}
public ICommand Cancel
{
get
{
return new RelayCommand(CancelExecute);
}
}
private void SaveExecute()
{
}
private void CancelExecute()
{
}
}
Please suggest me solution how can i pass the selected color to view model
You should be able to bind ImageColorPicker's SelectedColor to ViewModel's Property.
So in XAML add the binding:
SelectedColor="{Binding MySelectedColor, Mode=TwoWay}"
And in VM add the MySelectedColor property:
private Color selectedColor;
public Color MySelectedColor
{
get
{
return this.selectedColor;
}
set
{
this.selectedColor = value;
OnPropertyChanged("MySelectedColor");
}
}
When control's SelectedColor changes, it should automatically update the MySelectedColor in your VM.
I am struggling to figure out why a propertychanged event or lostfocus event is not being triggered when I enter text into a textbox and navigate away from the control.
I am building a Universal Windows Platform app.
I know I'm doing something retarded but I just don't see it.
Any suggestions?
XAML:
<Page
x:Class="xxx.Client.FormPage"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:viewModels="using:xxx.xxx.ViewModels"
Background="LightBlue"
mc:Ignorable="d">
<Page.Resources>
<Style x:Key="TextBoxStyle" TargetType="TextBox">
<Setter Property="HorizontalAlignment" Value="Stretch" />
<Setter Property="TextAlignment" Value="Center" />
</Style>
</Page.Resources>
<Page.DataContext>
<viewModels:FormViewModel />
</Page.DataContext>
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="auto" />
<RowDefinition Height="auto" />
<RowDefinition Height="auto" />
<RowDefinition Height="*" />
<RowDefinition Height="auto" />
</Grid.RowDefinitions>
<TextBox Grid.Row="0" Text="{Binding InstructorNameInput}" Style="{StaticResource TextBoxStyle}"
PlaceholderText="Instructor Name" />
<TextBox Grid.Row="1" Text="{Binding InstructorIdInput}" Style="{StaticResource TextBoxStyle}"
PlaceholderText="Instructor Id" />
<TextBox Grid.Row="2" Text="{Binding CourseInput}" Style="{StaticResource TextBoxStyle}"
PlaceholderText="Course" />
<Button Grid.Row="4" Content="Accept" Command="{Binding Submit}"
HorizontalAlignment="Stretch"
Foreground="Black" />
</Grid>
</Page>
ViewModel:
public partial class FormViewModel : ViewModelBase
{
public FormViewModel()
{
InstructorName = new RequiredField("Instructor's Name:");
InstructorId = new RequiredField("Instructor's Employee#:");
Course = new RequiredField("Course:");
var courses = CourseFactory.Produce();
var administration = new Administration(courses, null);
Submit = new DelegateCommand(_=> OnSubmit(), CanSubmit);
}
string _instructorNameInput = null;
public string InstructorNameInput
{
get { return _instructorNameInput; }
set
{
if (_instructorNameInput != value)
{
_instructorNameInput = value;
OnNotifyPropertyChanged();
}
}
}
string instructorIdInput = null;
public string InstructorIdInput
{
get { return instructorIdInput; }
set
{
if (instructorIdInput != value)
{
instructorIdInput = value;
OnNotifyPropertyChanged();
}
}
}
string courseInput = null;
public string CourseInput
{
get { return courseInput; }
set
{
if (courseInput != value)
{
courseInput = value;
OnNotifyPropertyChanged();
}
}
}
public RequiredField InstructorName { get; }
public RequiredField InstructorId { get; }
public RequiredField Course { get; }
public ObservableCollection<RequiredField> RequiredFields { get; } = new ObservableCollection<RequiredField>();
}
ViewModel.internal:
public partial class FormViewModel
{
static void OnSubmit()
{
var adminsistration = new Administration();
}
bool CanSubmit(object obj) => !GetUnsatisfied().Any();
IEnumerable<RequiredField> GetUnsatisfied()
{
if (string.IsNullOrEmpty(InstructorIdInput))
{
RequiredFields.Add(InstructorId);
}
else
{
var result = 0;
var isNumeric = int.TryParse(InstructorIdInput, out result);
if (!isNumeric)
{
RequiredFields.Add(new RequiredField(InstructorId.About, "Instructor ID must be numeric"));
}
}
if (string.IsNullOrEmpty(InstructorNameInput))
{
RequiredFields.Add(InstructorName);
}
if (string.IsNullOrEmpty(CourseInput))
{
RequiredFields.Add(Course);
}
return RequiredFields;
}
}
The default binding mode for UWP as MSDN says:
The default is OneWay.
Set it to TwoWay:
<TextBox Grid.Row="0" Text="{Binding InstructorNameInput, Mode=TwoWay}" .../>
I need to track the Current Column Name and Sort Direction In WPF MVVM DataGrid. I know how to do it in code behind. Plase see the code as follows:
private void columnHeader_Click(object sender, RoutedEventArgs e)
{
var columnHeader = sender as DataGridColumnHeader;
if (columnHeader != null)
{
columnName = ((DataGridColumnHeader)sender).Content.ToString();
ListSortDirection sortDirection = (((DataGridColumnHeader)sender).SortDirection != ListSortDirection.Ascending) ?
ListSortDirection.Ascending : ListSortDirection.Descending;
txb1.Text = columnName;
txb2.Text = sortDirection.ToString();
}
}
However, I am blocked in MVVM. In the View Model, I wrote codes in method sort() in SortCommand, but they did not work. I would appreciate if any one can help. Below are three files.
1) Xaml
<Window x:Class="SortSampleMVVM1.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity"
xmlns:se="clr-namespace:Microsoft.Expression.Interactivity.Core;assembly=Microsoft.Expression.Interactions"
Title="MainWindow" Height="350" Width="525">
<Grid>
<DataGrid x:Name="Test"
ItemsSource="{Binding}"
AutoGenerateColumns="False" >
<DataGrid.ColumnHeaderStyle>
<Style TargetType="{x:Type DataGridColumnHeader}">
<Setter Property="Command"
Value="{Binding SortCommand}"/>
<Setter Property="CommandParameter"
Value="{Binding Path=Content, RelativeSource={RelativeSource Self}}"/>
<Style.Triggers>
<Trigger Property="IsPressed" Value="True">
<Setter Property="Background" Value="Red" />
</Trigger>
</Style.Triggers>
</Style>
</DataGrid.ColumnHeaderStyle>
<DataGrid Name="dataGrid1" AutoGenerateColumns="False" ItemsSource="{Binding ViewSource.View}" >
<DataGrid.Columns>
<DataGridTextColumn Header="ID" Binding="{Binding ID }"
SortDirection="Descending" />
<DataGridTextColumn Header="firstName" Binding="{Binding firstName}"/>
<DataGridTextColumn Header="lastName" Binding="{Binding lastName}"/>
</DataGrid.Columns>
</DataGrid>
<Label Content="Column Name" HorizontalAlignment="Left" Margin="100,166,0,0" VerticalAlignment="Top"/>
<TextBox HorizontalAlignment="Left" Height="23" Margin="250,169,0,0" TextWrapping="Wrap" Name="txb1" Text="{Binding ColumnName}" VerticalAlignment="Top" Width="150" />
<Label Content="Sorting direction" HorizontalAlignment="Left" Margin="100,229,0,0" VerticalAlignment="Top"/>
<TextBox HorizontalAlignment="Left" Height="23" Margin="250,232,0,0" TextWrapping="Wrap" Name="txb2" Text="{Binding SortDirection}" VerticalAlignment="Top" Width="150" />
<Button Content="Refresh" Name="btnRefresh1" HorizontalAlignment="Left" Margin="140,273,0,0" VerticalAlignment="Top" Width="75" Command="{Binding Refresh1Command}" />
<Button Content="Refresh Keep Sort" Name="btnRefresh2" HorizontalAlignment="Left" Margin="282,273,0,0" VerticalAlignment="Top" Width="125" Command="{Binding Refresh2Command}" />
</Grid>
</Window>
2) Code behind
using System.Windows;**strong text**
using System.Collections.ObjectModel;
using System.Collections.Generic;
namespace SortSampleMVVM1
{
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
DataContext = new SortViewModel();
}
}
}
3) View Model
using System;
using System.ComponentModel;
using System.Windows.Input;
using System.Windows.Controls.Primitives;
using System.Windows;
using System.Windows.Data;
using System.Collections.ObjectModel;
namespace SortSampleMVVM1
{
class SortViewModel: INotifyPropertyChanged
{
public CollectionViewSource ViewSource { get; set; }
public ObservableCollection<MyData> Collection {get; set;}
private string _columnName;
private ListSortDirection _sortDirection;
private ICommand _sortCommand;
private ICommand _refresh1Command;
private ICommand _refresh2Command;
public SortViewModel ()
{
this.Collection = new ObservableCollection<MyData>();
Collection.Add(new MyData(1, "David", "Lee"));
Collection.Add(new MyData(2, "John", "kim"));
Collection.Add(new MyData(3, "Michael", "Wadsworth"));
Collection.Add(new MyData(4, "Chris", "Smith"));
Collection.Add(new MyData(5, "Peter", "Chen"));
Collection.Add(new MyData(6, "Jonas", "Zhang"));
this.ViewSource = new CollectionViewSource();
ViewSource.Source = this.Collection;
}
public event PropertyChangedEventHandler PropertyChanged;
public string ColumnName
{
get { return _columnName; }
set
{
_columnName = value;
OnPropertyChanged("ColumnName");
}
}
public ListSortDirection SortDirection
{
get { return _sortDirection; }
set
{
_sortDirection = value;
OnPropertyChanged("SortDirection");
}
}
protected void OnPropertyChanged(string propertyName)
{
if (PropertyChanged != null)
{
PropertyChanged(this,
new PropertyChangedEventArgs(propertyName));
}
}
#region SortCommand
public ICommand SortCommand
{
get
{
if (_sortCommand == null)
{
_sortCommand = new RelayCommand(param => this.sort(),
null);
}
return _sortCommand;
}
}
private void sort()
{
//var columnHeader = (object)sender as DataGridColumnHeader;
//if (columnHeader != null)
//{
// _columnName = ViewSource.GetValuecolumnName ((DataGridColumnHeader)sender).Content.ToString();
// ListSortDirection sortDirection = (((DataGridColumnHeader)sender).SortDirection != ListSortDirection.Ascending) ?
// ListSortDirection.Ascending : ListSortDirection.Descending;
//}
}
#endregion
#region Refresh1Command
public ICommand Refresh1Command
{
get
{
if (_refresh1Command == null)
{
_refresh1Command = new RelayCommand(param => this.Refresh1(),
null);
}
return _refresh1Command;
}
}
private void Refresh1()
{
ViewSource.SortDescriptions.Clear();
_columnName = "firstName";
_sortDirection = ListSortDirection.Descending;
ViewSource.SortDescriptions.Add(new SortDescription(_columnName, _sortDirection));
ViewSource.View.Refresh();
}
#endregion
#region Refresh2Command
public ICommand Refresh2Command
{
get
{
if (_refresh2Command == null)
{
_refresh2Command = new RelayCommand(param => this.Refresh2(),
null);
}
return _refresh2Command;
}
}
private void Refresh2()
{
ViewSource.SortDescriptions.Clear();
ViewSource.SortDescriptions.Add(new SortDescription(_columnName, _sortDirection));
ViewSource.View.Refresh();
}
#endregion
}
}
You can use following styling to get the column header.
<Style TargetType="{x:Type DataGridColumnHeader}">
<Setter Property="Command"
Value="{Binding DataContext.MyCommand}"/>
<Setter Property="CommandParameter"
Value="{Binding Path=Content, RelativeSource={RelativeSource Self}}"/>
<Style.Triggers>
<Trigger Property="IsPressed" Value="True">
</Trigger>
</Style.Triggers>
</Style>
</DataGrid.ColumnHeaderStyle>
You have to create the Command 'MyCommand' in your view model. then as the parameter of your execute method you will get column header name.
I have a DataGrid where each row has a delete button. If I set the Command="Delete" attribute on the Delete button element in XAML, the button is disabled at runtime. Why??
XAML:
<Page x:Class="AxureExport.TargetPage"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:local="clr-namespace:AxureExport"
mc:Ignorable="d"
d:DesignHeight="300" d:DesignWidth="400"
Title="Define Export Targets"
Loaded="Page_Loaded">
<Page.Resources>
<Style TargetType="{x:Type DataGridCell}">
<EventSetter Event="PreviewMouseLeftButtonDown"
Handler="DataGridCell_PreviewMouseLeftButtonDown" />
</Style>
</Page.Resources>
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="7" />
<ColumnDefinition Width="65" />
<ColumnDefinition Width="458*" />
<ColumnDefinition Width="47" />
<ColumnDefinition Width="10" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="7" />
<RowDefinition Height="63*" />
</Grid.RowDefinitions>
<!-- target file -->
<TextBlock Name="textBlock3"
Text="2. Select the location where you want to save the string files:"
Height="23"
HorizontalAlignment="Left"
Margin="5,0,0,0"
VerticalAlignment="Top"
Grid.Row="2"
Grid.Column="1"
Grid.ColumnSpan="4"
Width="441" />
<TextBlock Name="textBlock4"
Text="(Warning: This tool overwrites files in the target folder.)"
Height="16"
HorizontalAlignment="Left"
Margin="54,15,0,0"
VerticalAlignment="Top"
Width="256"
FontStyle="Italic"
FontWeight="Light"
FontSize="10"
Grid.Row="2"
Grid.Column="1"
Grid.ColumnSpan="2" />
<TextBlock Name="textBlock5"
Text="Target:"
Height="23"
HorizontalAlignment="Left"
Margin="22,30,0,238"
VerticalAlignment="Center"
Grid.Row="1"
Grid.Column="1" />
<!-- ExportTargets Datagrid -->
<DataGrid Name="ExportTargets"
AutoGenerateColumns="False"
Grid.Column="2"
Grid.Row="1"
Margin="0,71,0,63"
ItemsSource="{Binding Path=., Mode=TwoWay}"
SelectionUnit="Cell"
GridLinesVisibility="None"
RowDetailsVisibilityMode="Collapsed"
CanUserReorderColumns="False"
CanUserResizeColumns="False"
CanUserResizeRows="False"
RowHeaderWidth="40"
IsSynchronizedWithCurrentItem="True"
HorizontalScrollBarVisibility="Disabled"
CanUserAddRows="True"
CanUserDeleteRows="True">
<DataGrid.Resources>
<SolidColorBrush x:Key="{x:Static SystemColors.HighlightBrushKey}"
Color="Transparent" />
<SolidColorBrush x:Key="{x:Static SystemColors.ControlBrushKey}"
Color="Transparent" />
<SolidColorBrush x:Key="{x:Static SystemColors.HighlightTextBrushKey}"
Color="Black" />
<SolidColorBrush x:Key="{x:Static SystemColors.ControlTextBrushKey}"
Color="Black" />
</DataGrid.Resources>
<DataGrid.Columns>
<DataGridCheckBoxColumn Binding="{Binding IsXML, Mode=TwoWay}"
Header="XML"
CanUserSort="False"
CanUserReorder="False" />
<DataGridCheckBoxColumn Binding="{Binding IsProperty, Mode=TwoWay}"
Header="Property"
CanUserSort="False"
CanUserReorder="False" />
<DataGridTextColumn Binding="{Binding FolderName, Mode=TwoWay}"
Header="Folder"
Width="*"
CanUserReorder="False"
IsReadOnly="False" />
<DataGridTemplateColumn Header="Browse">
<DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<Button Name="Browse"
Command="{Binding BrowseCommand}"
HorizontalAlignment="Center"
Width="20">...</Button>
</DataTemplate>
</DataGridTemplateColumn.CellTemplate>
</DataGridTemplateColumn>
<DataGridTemplateColumn Header="Delete" IsReadOnly="True">
<DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<Button Name="Delete"
Command="{x:Static DataGrid.DeleteCommand}"
HorizontalAlignment="Center"
Width="20"
IsEnabled="True">X</Button>
</DataTemplate>
</DataGridTemplateColumn.CellTemplate>
</DataGridTemplateColumn>
</DataGrid.Columns>
</DataGrid>
<Button Name="NextButton"
Content="Next"
Grid.Column="2"
Grid.ColumnSpan="2"
Grid.Row="1"
Margin="0,0,2,12"
Width="100"
Height="40"
HorizontalAlignment="Right"
VerticalAlignment="Bottom"
Click="NextButton_Click" />
</Grid>
</Page>
Code-behind:
// DataTable
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
namespace AxureExport {
/// <summary>
/// Interaction logic for TargetPage.xaml
/// </summary>
public partial class TargetPage : Page {
FrameWindow _frame;
//ExportTargetInfos _eti;
public TargetPage(FrameWindow frame) {
InitializeComponent();
_frame = frame;
_frame.ExportTargets = new ExportTargetInfos(Properties.Settings.Default.ExportTargetHistory);
this.DataContext = _frame.ExportTargets;
}
//
// enable editing on single-click
private void DataGridCell_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e) {
DataGridCell cell = sender as DataGridCell;
if (!cell.IsEditing) {
if (!cell.IsFocused)
cell.Focus();
if (!cell.IsSelected)
cell.IsSelected = true;
}
}
private void Page_Loaded(object sender, RoutedEventArgs e) {
}
private void NextButton_Click(object sender, RoutedEventArgs e) {
Properties.Settings.Default.ExportTargetHistory = _frame.ExportTargets.GetExportTargets();
_frame.NavigateTo(typeof(ExportPage));
}
}
}
ViewModel:
using System;
using System.Collections.ObjectModel; // ObservibleCollection<>
using System.Collections.Specialized; // StringCollection
using System.ComponentModel; // INotifyPropertyChanged
namespace AxureExport {
public class ExportTargetInfos : ObservableCollection<ExportTargetInfo> {
const char _SEP = '|'; // field seperator character
// default constructor
public ExportTargetInfos() : base() {
}
// copy constructors
public ExportTargetInfos(ExportTargetInfos etis) : base() {
if (etis == null) return;
foreach (ExportTargetInfo eti in etis) {
this.Add(new ExportTargetInfo(eti.FolderName, eti.IsXML, eti.IsProperty));
}
}
public ExportTargetInfos(StringCollection sc) : base() {
if (sc == null) return;
foreach (string s in sc)
Add(ParseExportTarget(s));
}
public StringCollection GetExportTargets() {
StringCollection sc = new StringCollection();
foreach (ExportTargetInfo et in this)
sc.Add(BuildExportTarget(et));
return sc;
}
// create a string from an ExportTarget (for persistance)
private static string BuildExportTarget(ExportTargetInfo et) {
return et.FolderName + _SEP + et.IsXML.ToString() + _SEP + et.IsProperty.ToString();
}
// create an ExportTarget from an unparsed string (for persistance)
private static ExportTargetInfo ParseExportTarget(string s) {
int count = s.Split(_SEP).Length - 1;
string[] items = s.Split(new[] { _SEP }, StringSplitOptions.None);
string name = (count < 1 ? String.Empty : items[0]);
bool isXML = (count > 0 ? Convert.ToBoolean(items[1]) : false);
bool isProp = (count > 1 ? Convert.ToBoolean(items[2]) : false);
return new ExportTargetInfo(name, isXML, isProp);
}
}
//
// represents an export target (folder plus options) in it's parsed form
public class ExportTargetInfo : INotifyPropertyChanged {
public event PropertyChangedEventHandler PropertyChanged;
public IDelegateCommand BrowseCommand { protected set; get; }
// default constructor is needed to enable datagrid to add rows
public ExportTargetInfo() {
_folderName = String.Empty;
_isXML = false;
_isProperty = false;
this.BrowseCommand = new DelegateCommand(ExecuteBrowse, CanExecuteBrowse);
}
public ExportTargetInfo(string targetFolderName, bool isXML, bool isProperties) {
_folderName = targetFolderName;
_isXML = isXML;
_isProperty = isProperties;
this.BrowseCommand = new DelegateCommand(ExecuteBrowse, CanExecuteBrowse);
}
private string _folderName;
public string FolderName {
get { return _folderName; }
set { SetProperty<string>(ref _folderName, value, #"FolderName"); }
}
private bool _isXML;
public bool IsXML {
get { return _isXML; }
set { SetProperty<bool>(ref _isXML, value, #"IsXML"); }
}
private bool _isProperty;
public bool IsProperty {
get { return _isProperty; }
set { SetProperty<bool>(ref _isProperty, value, #"IsProperty"); }
}
// browse button for selected row clicked
void ExecuteBrowse(object param) {
// use WPF-WinForms interop (:-p)
var folderDialog = new System.Windows.Forms.FolderBrowserDialog();
folderDialog.Description = "Please designate the target folder";
folderDialog.SelectedPath = FolderName;
folderDialog.ShowNewFolderButton = true;
if (folderDialog.ShowDialog() == System.Windows.Forms.DialogResult.OK)
FolderName = folderDialog.SelectedPath;
}
bool CanExecuteBrowse(object param) {
return true;
}
protected bool SetProperty<T>(ref T storage, T value, string propertyName = null) {
if (object.Equals(storage, value))
return false;
storage = value;
OnPropertyChanged(propertyName);
return true;
}
protected void OnPropertyChanged(string propertyName) {
if (PropertyChanged != null)
PropertyChanged( this, new PropertyChangedEventArgs(propertyName));
}
}
}
Does anyone have insight as to what's the cause?
This isn't a solution, but through trial & error I discovered the disabled delete button behavior is caused by the SelectionUnit="Cell" setting in the DataGrid. Setting it to FullRow enables the delete row button.
<Button Name="NextButton" isEnable = "true" />