I have dynamically added some RichTextbox in my Silverlight app.
so, I want to get the actualHeight of these different RichTextBox for set my layout
code like this:
RichTextBox content = new RichTextBox();
content.TextWrapping = TextWrapping.Wrap;
content.Width = 800;
Paragraph paragraph = new Paragraph();
paragraph.Inlines.Add(p.Content);
content.IsReadOnly = true;
content.Blocks.Add(paragraph);
content.FontSize = 14;
content.BorderThickness = new Thickness(0);
content.Name = "content" + i;
height.Add(content.ActualHeight);
But I find that the content.ActualHeight is always 0.0
So, I want to know how to get the actualheight of richtextbox.
Related
I need to recreate a program similar to whatsapp that can send and receive messages, images videos and audio. I have created a WPF form to show messages that looks like this:
I have a stack panel that contains text bubbles on them. Text messages work fine but if I send an image I want the user to be able to click on the image text bubble and it must become full screen. The image text bubble consists of a label that has a frame in it and then within that frame the image is stored. The label was used since we could resize the label.
However, because the image is done like this dynamically, we cannot seem to register an on-click event on this image bubble. If you have any better ways that we can display the image or how to log this event it would be much appreciated. Here is the method used to add the image.
public void AddMessage_Image(string path, string displayName, int role, string date = "")
{
//Create an image from the path
ImageBrush image = new ImageBrush();
image.ImageSource = new BitmapImage(new Uri(path, UriKind.Absolute));
image.Stretch = Stretch.Uniform;
//Create a frame in which to place the image
Frame fr = new Frame();
fr.Background = image;
fr.MinHeight = 120;
fr.MinWidth = 160;
//Ensure scalabilty of the image
Viewbox vb = new Viewbox();
vb.Child = fr;
vb.Stretch = Stretch.Uniform;
//Place the image in a sizable container
Label lbl = new Label();
lbl.MinHeight = 10;
lbl.MinWidth = 10;
lbl.MaxHeight = 300;
lbl.MaxWidth = 400;
lbl.Content = vb;
if (role == (int) Role.Sender)
lbl.HorizontalAlignment = HorizontalAlignment.Right;
else
lbl.HorizontalAlignment = HorizontalAlignment.Left;
lbl.Background = Brushes.Black;
//Place the image in the chat
chatbox.Children.Add(lbl);
}
I have a question about multipage FixedPage. I have a Grid created programmatically and the Grid exceeds one A4 page. Now I want to print the Grid in several FixedPage with print margin. But on my way, I create the Grid repeatedly and offset the LeftTop point in the fixedPage Arrange function. I meet a problem that I cannot set print margin in fixedPage, because I set the print margin to the fixedPage and then the first page will have print margin and the next pages will be blank.
How do print multipage of FixedDocument for a large grid want to print？
PrintDialog pd = new System.Windows.Controls.PrintDialog();
if (pd.ShowDialog() == false)
{
return;
}
var pageSize = new Size(pd.PrintableAreaWidth, pd.PrintableAreaHeight);
var document = new FixedDocument();
document.DocumentPaginator.PageSize = pageSize;
for (int nPage = 0; nPage < MaxPage; nPage++)
{
Grid tempGrid = LoadControlMotherInit();
tempGrid.Width = GridWidth;
tempGrid.Height = GridActualHeight;
Point leftTop = new Point();
leftTop.X = 10;
leftTop.Y = -nPage * pageSize.Height;
// Create FixedPage
var fixedPage = new FixedPage();
fixedPage.Width = pageSize.Width;
fixedPage.Height = pageSize.Height;
fixedPage.Margin = new Thickness(0, 0, 0, 96);
fixedPage.Children.Add((UIElement)tempGrid);
fixedPage.Measure(pageSize);
fixedPage.Arrange(new Rect(leftTop, pageSize));
fixedPage.UpdateLayout();
// Add page to document
var pageContent = new PageContent();
((System.Windows.Markup.IAddChild)pageContent).AddChild(fixedPage);
document.Pages.Add(pageContent);
}
pd.PrintDocument(document.DocumentPaginator, "My Document");
From looking at your example,
PrintDialog.PrintDocument method takes in a DocumentPaginator, which could come from a multitude of source.
that being said, you can inherit from DocumentPaginator and take control of everything from PageSize, PageCount to the actual DocumentPage being returned.
Imagine your DocumentPage as a sliding window over your UIElement; but instead of sliding your DocumentPage, you slide your UIElement using its RenderTransform.
this code underlines all Text in the Textbox, can I underline only specific Text?
Brush brush = Brushes.Blue;
Pen pen = new Pen(brush,2);
TextBox tb1 = new TextBox();
tb1.AcceptsReturn = true;
tb1.Text = "This is a very long Text not?";
TextDecoration textDec = new TextDecoration(TextDecorationLocation.Underline,pen,1,TextDecorationUnit.Pixel,TextDecorationUnit.FontRecommended);
tb1.TextDecorations.Add(textDec);
tb1.Width = 400;
tb1.Height = 30;
this.AddChild(tb1);
The TextBox doesn't provide the ability to alter characteristics for individual characters. It's an all or none control.
The RichTextBox is the control you need.
I am using Silverlight 2 to dynamically add a TextBlock to a Canvas. I set the MaxWidth of the TextBlock but it ignores this value and displays a string longer than the MaxWidth value.
TextBlock label=new TextBlock();
label.SetValue(Canvas.LeftProperty,Convert.ToDouble(x+3));
label.SetValue(Canvas.TopProperty, Convert.ToDouble(y + 1));
label.Width = DisplayWidth - 6;
label.Height = DisplayHeight - 2;
label.TextWrapping = TextWrapping.NoWrap;
label.MaxWidth = DisplayWidth-6;
label.MinWidth = DisplayWidth-6;
label.Text = this.Title;
label.Margin = new Thickness(3.0);
baseCanvas.Children.Add(label);
What do I have to do to get the TextBlock to restrict its width to a specific value? Ideally I'll add conditional ellipses too (i.e. ...).
It would seem that MaxWidth on a TextBlock is ineffectual when the TextBlock is a direct child of a Canvas. I can't quite fathom why that would be so. However the solution would be to place the TextBlock in a Border:-
TextBlock label=new TextBlock();
label.SetValue(Canvas.LeftProperty,Convert.ToDouble(x+3));
label.SetValue(Canvas.TopProperty, Convert.ToDouble(y + 1));
label.Width = DisplayWidth - 6;
label.Height = DisplayHeight - 2;
label.TextWrapping = TextWrapping.NoWrap;
label.MaxWidth = DisplayWidth-6;
label.MinWidth = DisplayWidth-6;
label.Text = this.Title;
label.Margin = new Thickness(3.0);
Border border = new Border();
border.Child = label;
baseCanvas.Children.Add(border);
The Border will honor the MaxWidth of the TextBlock but since it is given no thickness the border itself is invisible.
The problem: I am not getting a textbox setting that will have a horizontally wordwrap and vertically auto grow functionality. I wish to do that by writing a code. I have written following code that creates a text box at mouse dblclick with wordwrap:
TextBox text2 = new TextBox();
text2.Width = 500;
text2.Visibility = Visibility.Visible;
text2.Focus();
text2.Height = 30;
text2.HorizontalAlignment = HorizontalAlignment.Left;
text2.VerticalAlignment = VerticalAlignment.Top;
Point p = e.GetPosition(LayoutRoot);
text2.Margin = new Thickness(p.X, p.Y, 0, 0);
LayoutRoot.Children.Add(text2);
But, textbox does not grow vertically.
Can somebody suggest me a code in C# to do exactly what I desire?
try using this
Grid grid = new Grid();
grid.RowDefinitions.Add(new RowDefinition() { Height = GridLength.Auto });
grid.RowDefinitions.Add(new RowDefinition());
TextBox textBox = new TextBox() { Width = 100, TextWrapping = TextWrapping.Wrap };
textBox.SetValue(Grid.RowProperty, 0);
grid.Children.Add(textBox);
window.Content = grid;
where window is the Name assigned to Window(root).
One way to accomplish the growth you're looking for is to use a string measuring mechanism which you would run any time the text in your text box changes. Simply measure and resize your text box accordingly with any change to the contents.
Have you tried this?
text2.Height = double.NaN; // or don't set the property, but some custom styles might give a default value ..
text2.TextWrapping = TextWrapping.Wrap;
text2.MinHeight = 30; // or not if you want the styles default
instead of
text2.Height = 30;
not setting it or using double.NaN is the same as using 'Auto' in xaml.