highlighting multiple words in a richtextbox WPF
Currently working on a project where I am trying to highlight words in a richtextbox. the problem im currently at is that I can only highlight 1 word well and if more words needs to be highlighted the functions doesn't work well. it has something to do with the pointers but I didn't found a solution for it since its pretty specific
The function currently is
public void HighlightText(RichTextBox richTextBox, int startPoint, int endPoint, Color color)
{
TextPointer pointer = richTextBox.Document.ContentStart;
TextPointer start = null, end = null;
int count = 0;
while (pointer != null)
{
if (pointer.GetPointerContext(LogicalDirection.Forward) == TextPointerContext.Text)
{
if (count == startPoint) start = pointer.GetInsertionPosition(LogicalDirection.Forward);
if (count == endPoint) end = pointer.GetInsertionPosition(LogicalDirection.Forward);
count++;
}
pointer = pointer.GetNextInsertionPosition(LogicalDirection.Forward);
}
if (start == null) start = richTextBox.Document.ContentEnd;
if (end == null) end = richTextBox.Document.ContentEnd;
TextRange range = new TextRange(start, end);
range.ApplyPropertyValue(TextElement.BackgroundProperty, new SolidColorBrush(color));
}
While this function works when i call it one time. It doesn't work the 2nd time i call it.
HighlightText(textToWrite, 0, 5, Color.FromRgb(255, 0, 0));
HighlightText(textToWrite, 6, 11, Color.FromRgb(255, 255, 0));
HighlightText(textToWrite, 12, 17, Color.FromRgb(255, 0, 0));
If i only call one of these methods instead of 3 it works like i want . i think it has something to do with the chars in the highlight but I dont know how to work arround it. If anyone has any workarround/ fix for me please let me know.
c# wpf background richtextbox highlight
asked Nov 20 '18 at 9:15
devdev
33
add a comment |
Currently working on a project where I am trying to highlight words in a richtextbox. the problem im currently at is that I can only highlight 1 word well and if more words needs to be highlighted the functions doesn't work well. it has something to do with the pointers but I didn't found a solution for it since its pretty specific
The function currently is
public void HighlightText(RichTextBox richTextBox, int startPoint, int endPoint, Color color)
{
TextPointer pointer = richTextBox.Document.ContentStart;
TextPointer start = null, end = null;
int count = 0;
while (pointer != null)
{
if (pointer.GetPointerContext(LogicalDirection.Forward) == TextPointerContext.Text)
{
if (count == startPoint) start = pointer.GetInsertionPosition(LogicalDirection.Forward);
if (count == endPoint) end = pointer.GetInsertionPosition(LogicalDirection.Forward);
count++;
}
pointer = pointer.GetNextInsertionPosition(LogicalDirection.Forward);
}
if (start == null) start = richTextBox.Document.ContentEnd;
if (end == null) end = richTextBox.Document.ContentEnd;
TextRange range = new TextRange(start, end);
range.ApplyPropertyValue(TextElement.BackgroundProperty, new SolidColorBrush(color));
}
While this function works when i call it one time. It doesn't work the 2nd time i call it.
HighlightText(textToWrite, 0, 5, Color.FromRgb(255, 0, 0));
HighlightText(textToWrite, 6, 11, Color.FromRgb(255, 255, 0));
HighlightText(textToWrite, 12, 17, Color.FromRgb(255, 0, 0));
If i only call one of these methods instead of 3 it works like i want . i think it has something to do with the chars in the highlight but I dont know how to work arround it. If anyone has any workarround/ fix for me please let me know.
c# wpf background richtextbox highlight
asked Nov 20 '18 at 9:15
devdev
33
add a comment |
Currently working on a project where I am trying to highlight words in a richtextbox. the problem im currently at is that I can only highlight 1 word well and if more words needs to be highlighted the functions doesn't work well. it has something to do with the pointers but I didn't found a solution for it since its pretty specific
The function currently is
public void HighlightText(RichTextBox richTextBox, int startPoint, int endPoint, Color color)
{
TextPointer pointer = richTextBox.Document.ContentStart;
TextPointer start = null, end = null;
int count = 0;
while (pointer != null)
{
if (pointer.GetPointerContext(LogicalDirection.Forward) == TextPointerContext.Text)
{
if (count == startPoint) start = pointer.GetInsertionPosition(LogicalDirection.Forward);
if (count == endPoint) end = pointer.GetInsertionPosition(LogicalDirection.Forward);
count++;
}
pointer = pointer.GetNextInsertionPosition(LogicalDirection.Forward);
}
if (start == null) start = richTextBox.Document.ContentEnd;
if (end == null) end = richTextBox.Document.ContentEnd;
TextRange range = new TextRange(start, end);
range.ApplyPropertyValue(TextElement.BackgroundProperty, new SolidColorBrush(color));
}
While this function works when i call it one time. It doesn't work the 2nd time i call it.
HighlightText(textToWrite, 0, 5, Color.FromRgb(255, 0, 0));
HighlightText(textToWrite, 6, 11, Color.FromRgb(255, 255, 0));
HighlightText(textToWrite, 12, 17, Color.FromRgb(255, 0, 0));
If i only call one of these methods instead of 3 it works like i want . i think it has something to do with the chars in the highlight but I dont know how to work arround it. If anyone has any workarround/ fix for me please let me know.
c# wpf background richtextbox highlight
asked Nov 20 '18 at 9:15
devdev
33
Currently working on a project where I am trying to highlight words in a richtextbox. the problem im currently at is that I can only highlight 1 word well and if more words needs to be highlighted the functions doesn't work well. it has something to do with the pointers but I didn't found a solution for it since its pretty specific
The function currently is
public void HighlightText(RichTextBox richTextBox, int startPoint, int endPoint, Color color)
{
TextPointer pointer = richTextBox.Document.ContentStart;
TextPointer start = null, end = null;
int count = 0;
while (pointer != null)
{
if (pointer.GetPointerContext(LogicalDirection.Forward) == TextPointerContext.Text)
{
if (count == startPoint) start = pointer.GetInsertionPosition(LogicalDirection.Forward);
if (count == endPoint) end = pointer.GetInsertionPosition(LogicalDirection.Forward);
count++;
}
pointer = pointer.GetNextInsertionPosition(LogicalDirection.Forward);
}
if (start == null) start = richTextBox.Document.ContentEnd;
if (end == null) end = richTextBox.Document.ContentEnd;
TextRange range = new TextRange(start, end);
range.ApplyPropertyValue(TextElement.BackgroundProperty, new SolidColorBrush(color));
}
While this function works when i call it one time. It doesn't work the 2nd time i call it.
HighlightText(textToWrite, 0, 5, Color.FromRgb(255, 0, 0));
HighlightText(textToWrite, 6, 11, Color.FromRgb(255, 255, 0));
HighlightText(textToWrite, 12, 17, Color.FromRgb(255, 0, 0));
If i only call one of these methods instead of 3 it works like i want . i think it has something to do with the chars in the highlight but I dont know how to work arround it. If anyone has any workarround/ fix for me please let me know.
c# wpf background richtextbox highlight
c# wpf background richtextbox highlight
asked Nov 20 '18 at 9:15
devdev
33
asked Nov 20 '18 at 9:15
devdev
33
edited Nov 20 '18 at 9:25
dev
asked Nov 20 '18 at 9:15
devdev
33
asked Nov 20 '18 at 9:15
devdev
33
asked Nov 20 '18 at 9:15
devdev
33
33
add a comment |
add a comment |
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