我有文本框textbox1,我想更改文本颜色,但在所有文本的部分.例如从/ *到* /喜欢visual studio中的评论？

我怎么能这样做？

解决方法:

试试这个：

TextRange rangeOfText1 = new TextRange(richTextBox.Document.ContentEnd, richTextBox.Document.ContentEnd);
rangeOfText1.Text = "Text1 ";
rangeOfText1.ApplyPropertyValue(TextElement.ForegroundProperty, Brushes.Blue);
rangeOfText1.ApplyPropertyValue(TextElement.FontWeightProperty, FontWeights.Bold);

TextRange rangeOfWord = new TextRange(richTextBox.Document.ContentEnd, richTextBox.Document.ContentEnd);
rangeOfWord.Text = "word ";
rangeOfWord.ApplyPropertyValue(TextElement.ForegroundProperty, Brushes.Red);
rangeOfWord.ApplyPropertyValue(TextElement.FontWeightProperty, FontWeights.Regular);

TextRange rangeOfText2 = new TextRange(richTextBox.Document.ContentEnd, richTextBox.Document.ContentEnd);
rangeOfText2.Text = "Text2 ";
rangeOfText2.ApplyPropertyValue(TextElement.ForegroundProperty, Brushes.Blue);
rangeOfText2.ApplyPropertyValue(TextElement.FontWeightProperty, FontWeights.Bold);

或这个：

public TestWindow()
{
InitializeComponent();

this.paragraph = new Paragraph();
rich1.Document = new FlowDocument(paragraph);

var from = "user1";
var text = "chat message goes here";
paragraph.Inlines.Add(new Bold(new Run(from + ": "))
{
    Foreground = Brushes.Red
});
paragraph.Inlines.Add(text);
paragraph.Inlines.Add(new LineBreak());
this.DataContext = this;
}
private Paragraph paragraph;

资源：

Change color and font for some part of text in WPF C#

和MSDN：

http://msdn.microsoft.com/en-us/library/system.windows.controls.richtextbox.document.aspx