In My project i have a Text Block
<TextBlock Name="MyDisplay" TextAlignment="Center"
Style="{StaticResource HeaderTextBlockStyle}"/>
And Set Of Buttons in a canvas
<Canvas Name="ButtonPanel">
<Button Style="{StaticResource MyButtonStyle}" Content="1" Canvas.Left="0" Canvas.Top="0"/>
<Button Style="{StaticResource MyButtonStyle}" Content="2" Canvas.Left="100" Canvas.Top="0"/>
<Button Style="{StaticResource MyButtonStyle}" Content="3" Canvas.Left="200" Canvas.Top="0"/>
<Button Style="{StaticResource MyButtonStyle}" Content="4" Canvas.Top="86" Canvas.Left="0"/>
<Button Style="{StaticResource MyButtonStyle}" Content="5" Canvas.Top="86" Canvas.Left="100"/> </Canvas>
I want to write button content in a text block
My code is
public DisplayPad()
{
this.InitializeComponent();
ButtonPanel.AddHandler(PointerPressedEvent, new PointerEventHandler(ScreenMarkup_PointerPressed), true);
UpdateDisplay();
}
public void ScreenMarkup_PointerPressed(object sender, RoutedEventArgs e)
{
Button button = e.OriginalSource as Button;
if (button == null)
return;
string content = button.Content.ToString();
double digit;
if (double.TryParse(content, out digit))
{
if(content == "1")
{
//codes
MyDisplay.Text = "1";
}
}
UpdateDisplay();
}
void UpdateDisplay()
{
try
{
MyDisplay.Foreground = Application.Current.Resources["ApplicationForegroundThemeBrush"] as Brush;
// Update the display
MyDisplay.Text = String.Format("{0:##.##}");
}
catch
{
//Exception
}
}
But this code is not working it is not update number in TextBlock.
But same thing is used in windows phone 8 which was working fine but only difference in code is (Windows phone 8 code)
public DisplayPad()
{
this.InitializeComponent();
ButtonPanel.AddHandler(Button.MouseLeftButtonUpEvent, new MouseButtonEventHandler(ScreenMarkupButton_MouseLeftButtonUp), true);
UpdateDisplay();
}
public void ScreenMarkupButton_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
{
Button button = e.OriginalSource as Button;
if (button == null)
return;
string content = button.Content.ToString();
double digit;
if (double.TryParse(content, out digit))
{
//My Codes
}
UpdateDisplay();
}
The OriginalSource object is not a Button but rather the inner TextBlock within the Button, so you need to change your code to
var textBlock = e.OriginalSource as TextBlock;
if (textBlock == null)
return;
string content = textBlock.Text;
Related
I have a problem, i have 5 buttons that load txt files from system and show it as string on textblocks but i dont know how to do it without 5 event handlers
private void OnClick1(object sender, RoutedEventArgs e)
{
OpenFileDialog openFileDialog = new OpenFileDialog();
if (openFileDialog.ShowDialog() == true)
numbers1.Text = File.ReadAllText(openFileDialog.FileName);
}
OnClick1 is button1, numbers1 is a textblock1
now i have 5 codes like this (with numbers2.Text, numbers3.Text etc) how can i do it shorter
I may be misunderstanding what you are asking. However, if you want the different buttons to use the same click event. Then the click event is going to have to be able to distinguish “which” button was clicked in order to know which text box to use.
In this case, I recommend you give each button a name and then in the click event, cast the sender as a Button, then check its name to determine which text box to use. All buttons are wired up to this ONE (1) event. Example something like…
private void btn_Click(object sender, RoutedEventArgs e) {
Button btnSender = (Button)sender;
TextBox tb = null;
switch (btnSender.Name) {
case "btn1":
tb = txt1;
break;
case "btn2":
tb = txt2;
break;
case "btn3":
tb = txt3;
break;
case "btn4":
tb = txt4;
break;
}
if (tb != null) {
OpenFileDialog openFileDialog = new OpenFileDialog();
if (openFileDialog.ShowDialog() == true)
tb.Text = File.ReadAllText(openFileDialog.FileName);
}
}
This should get you started I think
private void btnLoad_Click(object sender, RoutedEventArgs e)
{
OpenFileDialog openFileDialog = new OpenFileDialog();
openFileDialog.Multiselect = true;
List<TextBlock> textBlocks = new List<TextBlock>();
textBlocks.Add(txt1);
textBlocks.Add(txt2);
textBlocks.Add(txt3);
textBlocks.Add(txt4);
textBlocks.Add(txt5);
int count = 0;
if (openFileDialog.ShowDialog() == System.Windows.Forms.DialogResult.OK)
{
foreach (String files in openFileDialog.FileNames)
{
var currentText = textBlocks[count];
currentText.Text = File.ReadAllText(files);
count++;
}
}
}
Here is the xaml code
<StackPanel Orientation="Vertical" HorizontalAlignment="Center" Margin="5">
<Button Name="btnLoad" Content="Load All" Click="btnLoad_Click" ></Button>
<TextBlock x:Name="txt1" HorizontalAlignment="Left" Margin="5" TextWrapping="Wrap" Text="TextBlock" VerticalAlignment="Top" Width="118"/>
<TextBlock x:Name="txt2" HorizontalAlignment="Left" Margin="5" TextWrapping="Wrap" Text="TextBlock" VerticalAlignment="Top" Width="118"/>
<TextBlock x:Name="txt3" HorizontalAlignment="Left" Margin="5" TextWrapping="Wrap" Text="TextBlock" VerticalAlignment="Top" Width="118"/>
<TextBlock x:Name="txt4" HorizontalAlignment="Left" Margin="5" TextWrapping="Wrap" Text="TextBlock" VerticalAlignment="Top" Width="118"/>
<TextBlock x:Name="txt5" HorizontalAlignment="Left" Margin="5" TextWrapping="Wrap" Text="TextBlock" VerticalAlignment="Top" Width="118"/>
</StackPanel>
i want to get in my codebehind the Content of an button that has a grid in it with multiple textboxes.
i had this before Code and this works:
XAML:
<Button Click="btnClick_upload_Data">
<Button.Content>
<StackPanel Orientation="Horizontal">
<TextBlock Text="test1" ></TextBlock>
<TextBlock Text="test2" ></TextBlock>
</StackPanel>
</Button.Content>
</Button>
codebehind:
private void btnClick_upload_Data(object sender, RoutedEventArgs e)
{
string s = ((((sender as Button).Content) as StackPanel).Children[1] as TextBlock).Text;
//…
and this way i got the "test2" im my string variable.
now my XAML has changed a bit
my Question is how do i have to Change my function so i still get "test2" in my string variable 's'
new XAML:
<Button Click="btnClick_upload_Data" >
<Button.Content>
<StackPanel Orientation="Horizontal">
<Grid>
<Grid.RowDefinitions>
<RowDefinition></RowDefinition>
<RowDefinition></RowDefinition>
</Grid.RowDefinitions>
<TextBlock Text="test1" Grid.Row="0"></TextBlock>
<TextBlock Text="test2" Grid.Row="1"></TextBlock>
</Grid>
</StackPanel>
</Button.Content>
</Button>
new XAML:
private void btnClick_upload_Data(object sender, RoutedEventArgs e)
{
//????
thanks in advance
Try this:
private void btnClick_upload_Data(object sender, RoutedEventArgs e)
{
string s = null;
Button btn = (Button)sender;
StackPanel sp = btn.Content as StackPanel;
if (sp != null && sp.Children.Count > 0)
{
Grid grid = sp.Children[0] as Grid;
if (grid != null && grid.Children.Count > 1)
{
TextBlock textBlock = grid.Children[1] as TextBlock;
if (textBlock != null)
s = textBlock.Text;
}
}
MessageBox.Show(s);
}
I have a method which draws lines in a canvas like this:
public void drawoncanvas(double[] coord, string fullkey)
{
myLine = new Line();
myLine.X1 = coord[0];
myLine.X2 = coord[2];
myLine.Y1 = coord[1];
myLine.Y2 = coord[3];
MainWindow.mycanvas.Children.Add(myLine);
myLine.MouseEnter += mymouse; //add MousEnter Event
myLine.MouseLeave += mymouseleave; //add MouseLeave Event
}
The MouseEnter Event then adds a DropShadowEffect to the line that triggers the event:
public void mymouse(object sender, MouseEventArgs e)
{
Line thisline = sender as Line;
thisline.Effect = new DropShadowEffect{Color = new Color { A = 255, R = 255, G = 255, B = 0 }, Direction = 320,ShadowDepth = 0, Opacity = 1};
}
This works fine. But now I want to remove this effect as soon as the mouse cursor is not anymore over the line:
public void mymouseleave(object sender, MouseEventArgs e)
{
Line thisline = sender as Line;
thisline.Effect = null; //this doesn't do anything
}
I know this is a is probably a really simple question but I couldn't find any solution so far.
EDIT:
Ok I found what causes the problem, still don't know a solution though: I don't only create the dropshadow in the MouseEnter event but also display a tootltip, so my full Code is actually:
public void drawoncanvas(double[] coord, string fullkey)
{
myLine = new Line();
myLine.Stroke = Brushes.Red;
myLine.X1 = coord[0];
myLine.X2 = coord[2];
myLine.Y1 = coord[1];
myLine.Y2 = coord[3];
myLine.Tag = fullkey;
MainWindow.mycanvas.Children.Add(myLine);
myLine.MouseEnter += mymouse;
myLine.MouseLeave += mymouseleave;
}
ToolTip tt = new ToolTip();
public void mymouse(object sender, MouseEventArgs e)
{
Line thisline = sender as Line;
string data = Convert.ToString(thisline.Tag);
string[] splitdata = data.Split('/');
tt.Content = String.Concat(splitdata[0], " -> ", splitdata[3] ,"kt -> ", splitdata[1]);
tt.StaysOpen = false;
tt.IsOpen = true; //the removing of the shadow on MouseLeave works when I comment this line out
thisline.Effect = new DropShadowEffect{Color = new Color { A = 255, R = 255, G = 255, B = 0 }, Direction = 320,ShadowDepth = 0, Opacity = 1};
}
public void mymouseleave(object sender, MouseEventArgs e)
{
Line thisline = sender as Line;
tt.IsOpen = false;
thisline.Effect = null;
}
If I simply comment out the tt.IsOpen = true; and do not display the tooltip it all works fine.....I'm really confused.
EDIT 2:
Here the XAML:
<Window x:Class="mapO1.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:mapO1"
Title="mapO1" Height="600" Width="750" WindowStartupLocation="CenterScreen" SizeChanged="MainWindow_SizeChanged">
<Grid>
<Grid x:Name="mygrid">
<local:ZoomBorder x:Name="border" ClipToBounds="True" Background="Black">
<Grid Name="maingrid">
<Image Name="image1" />
<Canvas Name="mycanvas" HorizontalAlignment="Left" VerticalAlignment="Top" ClipToBounds="False"/>
</Grid>
</local:ZoomBorder>
<Button x:Name="button1" Content="Fullscreen on/off" HorizontalAlignment="Right" Height="18" Margin="0,20,50,0" VerticalAlignment="Top" Opacity="0.5" Width="108" FontWeight="Bold" Click="button1_Click"/>
<ComboBox x:Name="comboBox1" Height="24" HorizontalAlignment="Left" VerticalAlignment="Top" Width="150" Margin="10,20,0,0" Opacity="0.5" FontWeight="Bold" Text="Select Period" SelectionChanged="comboBox1_SelectionChanged"/>
<ComboBox x:Name="comboBox2" Height="24" HorizontalAlignment="Left" VerticalAlignment="Top" Width="150" Margin="10,60,0,0" FontWeight="Bold" Opacity="0.5" Text="Select Stream" DropDownClosed="comboBox2_DropDownClosed"/>
</Grid>
</Grid>
</Window>
Cropping the image is not working properly. Where I'm wrong?
My Xaml :
<Grid x:Name="Gridimage1">
<Image Name="image1" Grid.Column="0" Height="317" HorizontalAlignment="Left" Margin="20,67,0,0" Stretch="Fill" VerticalAlignment="Top" Width="331"></Image>
<Canvas x:Name="BackPanel">
<Rectangle x:Name="selectionRectangle" Stroke="LightBlue" Fill="#220000FF" Visibility="Collapsed" />
</Canvas>
</Grid>
<Button Content=">>" Height="23" HorizontalAlignment="Left" Margin="357,201,0,0" Name="Go" VerticalAlignment="Top" Width="41" Click="Go_Click" FontWeight="Bold" Visibility="Hidden" />
<Image Grid.Column="1" Height="317" HorizontalAlignment="Left" Margin="408,67,0,0" Name="image2" Stretch="Fill" VerticalAlignment="Top" Width="331" />
C# :
private bool isDragging = false;
private Point anchorPoint = new Point();
public MainWindow()
{
InitializeComponent();
Gridimage1.MouseLeftButtonDown += new MouseButtonEventHandler(image1_MouseLeftButtonDown);
Gridimage1.MouseMove += new MouseEventHandler(image1_MouseMove);
Gridimage1.MouseLeftButtonUp += new MouseButtonEventHandler(image1_MouseLeftButtonUp);
Go.IsEnabled = false;
image2.Source = null;
}
private void Go_Click(object sender, RoutedEventArgs e)
{
if (image1.Source != null)
{
Rect rect1 = new Rect(Canvas.GetLeft(selectionRectangle), Canvas.GetTop(selectionRectangle), selectionRectangle.Width, selectionRectangle.Height);
System.Windows.Int32Rect rcFrom = new System.Windows.Int32Rect();
rcFrom.X = (int)((rect1.X) * (image1.Source.Width) /(image1.Width));
rcFrom.Y = (int)((rect1.Y) *(image1.Source.Height) / (image1.Height));
rcFrom.Width = (int)((rect1.Width) * (image1.Source.Width) /(image1.Width));
rcFrom.Height = (int)((rect1.Height) * (image1.Source.Height) /(image1.Height));
BitmapSource bs = new CroppedBitmap(image1.Source as BitmapSource, rcFrom);
image2.Source = bs;
}
}
#region "Mouse events"
private void image1_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
if (isDragging == false)
{
anchorPoint.X = e.GetPosition(BackPanel).X;
anchorPoint.Y = e.GetPosition(BackPanel).Y;
isDragging = true;
}
}
private void image1_MouseMove(object sender, MouseEventArgs e)
{
if (isDragging)
{
double x = e.GetPosition(BackPanel).X;
double y = e.GetPosition(BackPanel).Y;
selectionRectangle.SetValue(Canvas.LeftProperty, Math.Min(x, anchorPoint.X));
selectionRectangle.SetValue(Canvas.TopProperty, Math.Min(y, anchorPoint.Y));
selectionRectangle.Width = Math.Abs(x - anchorPoint.X);
selectionRectangle.Height = Math.Abs(y - anchorPoint.Y);
if (selectionRectangle.Visibility != Visibility.Visible)
selectionRectangle.Visibility = Visibility.Visible;
}
}
private void image1_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
{
if (isDragging)
{
isDragging = false;
if(selectionRectangle.Width >0)
{
Go.Visibility = System.Windows.Visibility.Visible;
Go.IsEnabled = true;
}
if (selectionRectangle.Visibility != Visibility.Visible)
selectionRectangle.Visibility = Visibility.Visible;
}
}
private void RestRect()
{
selectionRectangle.Visibility = Visibility.Collapsed;
isDragging = false;
}
#endregion
It is cropping the wrong part.
The Margin property was not set properly to the Canvas control. It should be the same as Image control's margin properly value. If we don't set Margin to Canvas, It will take the full window size.
Xaml
<Grid x:Name="Gridimage1" Margin="0,0,411,100">
<Image Name="image1" Grid.Column="0" Height="317" HorizontalAlignment="Left" Margin="20,67,0,0" Stretch="Fill" VerticalAlignment="Top" Width="331">
</Image>
<Canvas x:Name="BackPanel" Margin="20,67,0,0">
<Rectangle x:Name="selectionRectangle" Stroke="LightBlue" Fill="#220000FF" Visibility="Collapsed" />
</Canvas>
</Grid>
<Grid x:Name="other">
<Button Content=">>" Height="23" HorizontalAlignment="Left" Margin="341,152,0,0" Name="Go" VerticalAlignment="Top" Width="41" Click="Go_Click" FontWeight="Bold" />
<Image Height="317" HorizontalAlignment="Left" Margin="403,10,-217,-7" Name="image2" Stretch="Fill" VerticalAlignment="Top" Width="331" />
</Grid>
</Grid>
I have some problems finding the right TextBlock control inside a StackPanel.
My markup:
<ListBox Name="lstTimeline" ItemContainerStyle="{StaticResource TwItemStyle}"
MouseDoubleClick="lstTimeline_MouseDoubleClick">
<ListBox.ItemTemplate>
<DataTemplate>
<DockPanel MaxWidth="{Binding ElementName=lstTimeline, Path=ActualWidth}">
<Border Margin="10" DockPanel.Dock="Left" BorderBrush="White"
BorderThickness="1" Height="48" Width="48" HorizontalAlignment="Center">
<Image Source="{Binding ThumbNail, IsAsync=True}" Height="48" Width="48" />
</Border>
<StackPanel Name="stkPanel" Margin="10" DockPanel.Dock="Right">
<TextBlock Text="{Binding UserName}" FontWeight="Bold" FontSize="18" />
<TextBlock Text="{Binding Text}" Margin="0,4,0,0" FontSize="14"
Foreground="#c6de96" TextWrapping="WrapWithOverflow" />
<TextBlock Text="{Binding ApproximateTime}" FontSize="14"
FontFamily="Georgia" FontStyle="Italic" Foreground="#BBB" />
<TextBlock Text="{Binding ScreenName}" Name="lblScreenName" FontSize="14"
FontFamily="Georgia" FontStyle="Italic" Foreground="#BBB"
Loaded="lblScreenName_Loaded" />
</StackPanel>
</DockPanel>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
My double click code:
private void lstTimeline_MouseDoubleClick(object sender, MouseButtonEventArgs e)
{
ListBoxItem lbi = (lstTimeline.SelectedItem as ListBoxItem);
StackPanel item = lbi.FindName("stkPanel") as StackPanel;
if (item != null)
MessageBox.Show("StackPanel null");
TextBlock textBox = item.FindName("lblScreenName") as TextBlock;
if (textBox != null)
MessageBox.Show("TextBlock null");
MessageBox.Show(textBox.Text);
}
But the StackPanel is null. How do find the right TextBlock in SelectedItem?
Thanks for your help.
ListBoxItem myListBoxItem = (ListBoxItem)(lstUniqueIds.ItemContainerGenerator.ContainerFromIndex(lstUniqueIds.SelectedIndex));
ContentPresenter myContentPresenter = FindVisualChild<ContentPresenter>(myListBoxItem);
DataTemplate myDataTemplate = myContentPresenter.ContentTemplate;
CheckBox target = (CheckBox)myDataTemplate.FindName("chkUniqueId", myContentPresenter);
if (target.IsChecked)
{
target.IsChecked = false;
}
else
{
target.IsChecked = true;
}
Function FindVisualChild can be found on the MSDN page FrameworkTemplate.FindName Method:
private childItem FindVisualChild<childItem>(DependencyObject obj)
where childItem : DependencyObject
{
for (int i = 0; i < VisualTreeHelper.GetChildrenCount(obj); i++)
{
DependencyObject child = VisualTreeHelper.GetChild(obj, i);
if (child != null && child is childItem)
return (childItem)child;
else
{
childItem childOfChild = FindVisualChild<childItem>(child);
if (childOfChild != null)
return childOfChild;
}
}
return null;
}
There's a specific function to use when you're looking for something whose name is defined in a template. Try it like this:
private void lstTimeline_MouseDoubleClick(object sender, MouseButtonEventArgs e)
{
ListBoxItem lbi = (lstTimeline.SelectedItem as ListBoxItem);
StackPanel item = Template.FindName("stkPanel",lbi) as StackPanel;
if (item != null)
MessageBox.Show("StackPanel null");
TextBlock textBox = Template.FindName("lblScreenName",item) as TextBlock;
if (textBox != null)
MessageBox.Show("TextBlock null");
MessageBox.Show(textBox.Text);
}
Linq to xml with a get and set model.
var item = ...
lstTimeline.SelectedIndex = -1;
lstTimeline.ItemsSource = item;