WPF RichTextBox的常用方法和属性（内容的读取/导入等）

1. 取得已被选中的内容：

(1)使用 RichTextBox.Document.Selection属性

(2)访问RichTextBox.Document.Blocks属性的“blocks”中的Text

2. 在XAML中增加内容给RichTextBox:

<RichTextBox IsSpellCheckEnabled="True">

<FlowDocument>

<Paragraph>

<!-- 这里加上你的内容 -->

This is a richTextBox. I can <Bold>Bold</Bold>读取richtextbox, <Italic>Italicize</Italic>, <Hyperlink>Hyperlink stuff</Hyperlink> right in my document.

</Paragraph>

</FlowDocument>

</RichTextBox>

3. 缩短段间距,类似<BR>,而不是<P>

方法是使用Style定义段间距:

<RichTextBox>

<RichTextBox.Resources>

<Style TargetType="{x:Type Paragraph}">

<Setter Property="Margin" Value="0"/>

</Style>

</RichTextBox.Resources>

<FlowDocument>

<Paragraph>

This is my first paragraph... see how there is...

</Paragraph>

<Paragraph>

a no space anymore between it and the second paragraph?

</Paragraph>

</FlowDocument>

</RichTextBox>

4. 从文件中读出纯文本文件后放进RichTextBox或直接将文本放进RichTextBox中:

private void LoadTextFile(RichTextBox richTextBox, string filename)

{

richTextBox.Document.Blocks.Clear();

using (StreamReader streamReader = File.OpenText(filename)) {

Paragraph paragraph = new Paragraph();

paragraph.Text = streamReader.ReadToEnd();

richTextBox.Document.Blocks.Add(paragraph);

}

}

private void LoadText(RichTextBox richTextBox, string txtContent)

{

richTextBox.Document.Blocks.Clear();

Paragraph paragraph = new Paragraph();

paragraph.Text = txtContent;

richTextBox.Document.Blocks.Add(paragraph);

}

5. 取得指定RichTextBox的内容：

private string GetText(RichTextBox richTextBox)

{

TextRange textRange = new TextRange(richTextBox.Document.ContentStart, richTextBox.Document.ContentEnd);

return textRange.Text;

}

6. 将RTF (rich text format)放到RichTextBox中：

private static void mergeindex(string sourcepath, string targetpath) 。 private static void delindex(string dirpath, string key) { 。 private static void delindex(string dirpath, string key) 。

{

if (string.IsNullOrEmpty(rtf)) {

throw new ArgumentNullException();

}

textrange textrange = new textrange(richtextbox.document.contentstart, richtextbox.document.contentend)。9.i have got a computer at home.it helps me a lot.now i often write my homework on the computer.first,i open a new document.next读取richtextbox,i write my homework in the new document.then,i save the document.finally,i print the document.at the weekends i sometimes use the internet to get information for my lessons,send emails to my friends and check the train timetables,but i never play games on it.。//called by the framework as part of the file new command. the default implementation of this function calls the deletecontents member function to ensure that the document is empty and then marks the new document as clean. override this function to initialize the data structure for a new document. you should call the base class version of this function from your override.。

using (MemoryStream rtfMemoryStream = new MemoryStream()) {

using (StreamWriter rtfStreamWriter = new StreamWriter(rtfMemoryStream)) {

rtfStreamWriter.Write(rtf);

rtfStreamWriter.Flush();

rtfMemoryStream.Seek(0, SeekOrigin.Begin);

//Load the MemoryStream into TextRange ranging from start to end of RichTextBox.

textRange.Load(rtfMemoryStream, DataFormats.Rtf);

}

}

}

7. 将文件中的内容加载为RichTextBox的内容

private static void LoadFile(string filename, RichTextBox richTextBox)

{

if (string.IsNullOrEmpty(filename)) {

throw new ArgumentNullException();

}

if (!File.Exists(filename)) {

throw new FileNotFoundException();

}

using (FileStream stream = File.OpenRead(filename)) {

TextRange documentTextRange = new TextRange(richTextBox.Document.ContentStart, richTextBox.Document.ContentEnd);

string dataFormat = DataFormats.Text;

string imagetype = path.getextension(fileimg.postedfile.filename).tolower()。string filename = system.io.path.getfilename(theentry.name)。 string fileext = path.getextension(filename).substring(1)。

if (String.Compare(ext, ".xaml",true) == 0) {

dataFormat = DataFormats.Xaml;

}

else if (String.Compare(ext, ".rtf", true) == 0) {

dataFormat = DataFormats.Rtf;

}

documentTextRange.Load(stream, dataFormat);

}

}

8. 将RichTextBox的内容保存为文件：

private static void SaveFile(string filename, RichTextBox richTextBox)

{

if (string.IsNullOrEmpty(filename)) {

throw new ArgumentNullException();

}

using (FileStream stream = File.OpenWrite(filename)) {

TextRange documentTextRange = new TextRange(richTextBox.Document.ContentStart, richTextBox.Document.ContentEnd);

string dataFormat = DataFormats.Text;

string imagetype = path.getextension(fileimg.postedfile.filename).tolower()。string filename = system.io.path.getfilename(theentry.name)。 string fileext = path.getextension(filename).substring(1)。

if (String.Compare(ext, ".xaml", true) == 0) {

dataFormat = DataFormats.Xaml;

}

else if (String.Compare(ext, ".rtf", true) == 0) {

dataFormat = DataFormats.Rtf;

}

documentTextRange.Save(stream, dataFormat);

}

}

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