My problem is that when I paste text into a rich text box I would like to get rid of all the formatting. Now this basically works:
private void RichTextBox1_Pasting(object sender, DataObjectPastingEventArgs e)
{
if (hasImage(Clipboard.GetDataObject()))
{
e.CancelCommand();
}
RichTextBox rtb = sender as RichTextBox;
if (Clipboard.ContainsText(TextDataFormat.Rtf) || Clipboard.ContainsText())
{
// get rid of formatting
string append = Clipboard.GetText(TextDataFormat.UnicodeText);
Clipboard.SetText(append, TextDataFormat.UnicodeText);
}
}
The problem is: If I previously had formatted text in my rich text box (e.g., bold text) and removed this text, the caret would still be bold (or italic if italic was previously selected - this is easy to spot since the caret would be oblique!). In this case, the text would also be inserted with this formatting. How can I get rid of that?
If you want to clear the entire document of previous formatting, you could do something like:
TextRange wholeDocument = new TextRange(Document.ContentStart, Document.ContentEnd);
wholeDocument.ClearAllProperties();
If you want to keep the previous formatting (i.e. you are appending), it looks like this may be useful: https://msdn.microsoft.com/en-us/library/ms597038(v=vs.110).aspx
Although this only solves part of the problem, it is satisfactory for our purposes:
rtb.Selection.ClearAllProperties();
With this line, the formatting of the selected text is removed. So if you mark some text that is formatted and press CTRL+V, the text from the clipboard is inserted without formattings.
What remains unsolved is how to clear the formattings of the caret if you just remove a couple of characters using backspace.
Related
I have a RichTextBox. I'm working on changing the SelectionBackColor only of the selected text.
Then, I have a ToolStripMenuItem(let's call it 'buttonA' for now) which is responsible to change the SelectionBackColor of the selected text. The problem I'm facing is after I click buttonA, the background color of the selected text in the RichTextBox can be successfully done. However, when I add some other characters or text right after the changed background color text, it doesn't use the default background color. Instead, it continues to use the same background color as assigned from buttonA, which I don't want to happen.
At first, I thought that my start index and end index of the selected text was problematic. But, I don't think there's any problems in its codes. Below shows the code example:
SolidBrush textBgCol; //a variable to keep color
this.richTextBox1.Select = this.richTextBox1.SelectionStart, this.richTextBox1.SelectionLength;
this.richTextBox1.SelectionBackColor = Color.FromArgb(textBgCol.Color.A, textBgCol.Color.R, textBgCol.Color.G, textBgCol.Color.B);
One of my efforts was to change the SelectionBackColor to default in the KeyDown event of richTextBox1. However, the background color of the new or successive characters and text were still the same as assigned from buttonA. Below shows the code example:
private void richTextBox1_KeyDown(object sender, KeyEventArgs e)
{
this.richTextBox1.SelectionBackColor = default;
}
I've also tried to refer to this but, I don't think it helps me to solve my case here.
Other than that, just to confirm that my richTextBox1's SelectionStart and SelectionLength were okay, I've even referred to these: ref1, ref2, and ref3.
May I know any other workarounds for this please? Or, were there anything inside my codes that I've missed?
Based on comment by #Jimi:
I just need to change the codes in my richTextBox1's KeyDown event handler to:
if(richTextBox1.SelectionBackColor != richTextBox1.BackColor)
{
richTextBox1.SelectionBackColor = richTextBox1.BackColor;
}
Below shows the demo:
Thanks!
This is my code for changing the font style to normal. But my problem is that it changes all of the text in the RichTextBox. What I want is that it will change the selected text and change the style of the text I will write.
private void italicToggle_Unchecked(object sender, RoutedEventArgs e)
{
text.Selection.ApplyPropertyValue(FontStyleProperty, FontStyles.Normal);
text.FontStyle = FontStyles.Italic;
}
A textbox contains only "unformatted text." That is, you can set the font or font style, etc for the whole textbox but not for a portion (selection). To be able to change a portion of text you must use a RichTextBox (RichTextBox Class). And see this for an overview (RichTextBox Overview).
after a long search on the net, I hope you can help me.
My Problem:
I want to select the complete text in a TextBox
and will show the caret (blinking cursor) after the last character.
Always I have found information about one problem or information to hide the caret.
The separate things are no problems but the combination of it don't work.
// Set the focus to the TextBox
myTextBox.Focus();
// Select the complete text, but hide the caret (blinking cursor)
myTextBox.SelectAll();
// or
// myTextBox.Select(0, myTextBox.Text.Length);
// Set the caret after the last character, but loss the selection from the text
myTextBox.CaretIndex = myTextBox.Text.Length;
So, I see the caret after the last character, but the text is not selected
myTextBox.Focus();
myTextBox.SelectAll();
myTextBox.CaretIndex = myTextBox.Text.Length;
And so, the text is selected, but no caret is shown.
myTextBox.Focus();
myTextBox.CaretIndex = myTextBox.Text.Length;
myTextBox.SelectAll();
And that's the problem: one of them deactivate the another one, but I need these two things at the same time
I using WPF and .Net 4.0
Thanks for helping :-)
The problem is the strong internal connection in the TextBox between CaretIndex and the Selection.
Whenever you modify the selection with Select() or SelectAll(), the TextBox automatically places the CaretIndex at the beginning of the selection. In reverse, the TextBox clears the selection when you manually modify the CaretIndex. You can make this behavior visible, if you register for SelectionChanged in the TextBox and output the current CaretIndex to Console.
This is for a good reason, as Okuma.Scott already mentioned in his comment.
So if your desired behaviour is really required, you probably need to implement your own CustomTextBox.
This worked for me:
TextBox.Text = _Text;
System.Windows.Input.Keyboard.Focus(TextBox);
TextBox.GotFocus += (sender, e) => {
if (_selectAll)
{
//I think Caret can be set here but I didn't try it
TextBox.SelectAll();
}
};
I'm using a 'Paste' button command in my view Model to copy RTF from the clipboard. PastedText is my string property that a RichTextBox is bound to in my view:
private void FormatPastedTextCommandAction()
{
PastedText += Clipboard.GetText(TextDataFormat.Rtf);
}
This works and the text is pasted on pressing the Paste button. However, I want to lock down the formatting on the paste function and remove all formatting from the pasted RTF string (colour, italics, set to black Arial 12).
I would just use PastedText += Clipboard.GetText();
to get the plain text but it pastes in at a different font size and I need it in RTF format. I've looked at iterating over the RTF string and doing a find/replace on font size, colour etc. but the RTF is very complex even for a couple of words.
Is there any way around this? Thanks
In the end I used code behind in the view to strip formatting from the RichTextBox itself using a 'Format' button:
private void _btnFormat_Click(object sender, RoutedEventArgs e)
{
TextRange rangeOfText = new TextRange(richTextBoxArticleBody.Document.ContentStart, richTextBoxArticleBody.Document.ContentEnd);
rangeOfText.ApplyPropertyValue(TextElement.ForegroundProperty, Brushes.Black);
rangeOfText.ApplyPropertyValue(TextElement.FontSizeProperty, "12");
rangeOfText.ApplyPropertyValue(TextElement.FontFamilyProperty, "Arial");
rangeOfText.ApplyPropertyValue(TextElement.FontStyleProperty, "Normal");
rangeOfText.ApplyPropertyValue(Inline.TextDecorationsProperty, null);
rangeOfText.ApplyPropertyValue(Paragraph.MarginProperty, new Thickness(0));
}
This does a good job and doesn't really break the MVVM pattern as the code is UI logic only.
If I copy some text with different format and paste it to my richtextbox it is not plain I mean its format will be copied as well.
Is there anyway I can copy-paste as a plain text?
By the way my program is on WinForm
thanks for any answer
you must use WinForm RichTextBox (not in UI, just in code), even if you are on WPF, in order to convert RTF to plain text. Use this method in your Copy event.
C# code :
private String ConvertRtfToText()
{
System.Windows.Forms.RichTextBox rtfBox = new System.Windows.Forms.RichTextBox();
rtfBox.Rtf = this.rtfData;
return rtfBox.Text;
}
VB.Net Code :
Private Function ConvertRtfToText() As String
Dim rtfBox As RichTextBox = New RichTextBox()
rtfBox.Rtf = Me.rtfData
Return rtfBox.Text
End Function
source : http://msdn.microsoft.com/en-US/en-en/library/vstudio/cc488002.aspx
I recently had the same issue. I did want to retain some of the formatting, i.e. paragraphs and line feeds, but I required all the addition text format to be removed.
I'm working in WPF but the RichTextBox interface is the same. I have created a button that will allow users to select some text and remove the formatting. It is very simple, you just need to use the ClearAllProperties() method on the TextSelection object.
C# Code (WPF):
private void ClearFormat_Click(object sender, RoutedEventArgs e)
{
rtbText.Selection.ClearAllProperties();
}
This is a super easy solution but perhaps not super elegant...
1) Add a plain textbox to your form and make it hidden
2) Create a button to remove the formatting (or you can do this
automatically when the text is pasted)
3) In the OnClick (or OnPaste) code just copy the text from the rich
textbox control to the plain textbox control then copy the text
from the plain textbox back to the rich textbox control (see example
below)
private void btnRemoveFormatting_Click(object sender, EventArgs e)
{
txtPlainText.Text = txtRTF.Text;
txtRTF.Text = ""; // Required - this makes sure all formatting is gone
txtRTF.Text = txtPlainText.Text;
}