如何使用RichTextBox控件将\ line附加到RTF中

使用Microsoft RichTextBox控件时，可以添加这样的新行……

richtextbox.AppendText(System.Environment.NewLine); // appends \r\n 

但是，如果您现在查看生成的rtf，\ r \ n字符将转换为\ par not \ line

如何将\ line控制代码插入生成的RTF中？

什么行不通：

令牌替换

黑客喜欢在字符串的末尾插入一个令牌，然后在事实之后替换它，所以像这样：

 string text = "my text"; text = text.Replace("||" "|"); // replace any '|' chars with a double '||' so they aren't confused in the output. text = text.Replace("\r\n", "_|0|_"); // replace \r\n with a placeholder of |0| richtextbox.AppendText(text); string rtf = richtextbox.Rtf; rtf.Replace("_|0|_", "\\line"); // replace placeholder with \line rtf.Replace("||", "|"); // set back any || chars to | 

这几乎可以工作，如果你必须支持从右到左的文本，它会分解，因为从右到左的控制序列总是在占位符的中间结束。

发送密钥消息

 public void AppendNewLine() { Keys[] keys = new Keys[] {Keys.Shift, Keys.Return}; SendKeys(keys); } private void SendKeys(Keys[] keys) { foreach(Keys key in keys) { SendKeyDown(key); } } private void SendKeyDown(Keys key) { user32.SendMessage(this.Handle, Messages.WM_KEYDOWN, (int)key, 0); } private void SendKeyUp(Keys key) { user32.SendMessage(this.Handle, Messages.WM_KEYUP, (int)key, 0); } 

这也最终被转换为\ par

有没有办法将消息直接发布到msftedit控件以插入控制字符？

我完全难过，任何想法的家伙？ 谢谢你的帮助！

Answer 1

在我的测试中显示，添加Unicode“行分隔符”（U + 2028）确实有效：

 private void Form_Load(object sender, EventArgs e) { richText.AppendText("Hello, World!\u2028"); richText.AppendText("Hello, World!\u2028"); string rtf = richText.Rtf; richText.AppendText(rtf); } 

当我运行程序时，我得到：

 Hello, World! Hello, World! {\rtf1\ansi\ansicpg1252\deff0\deflang1031{\fonttbl{\f0\fnil\fcharset0 Courier New;}} {\colortbl ;\red255\green255\blue255;} \viewkind4\uc1\pard\cf1\f0\fs17 Hello, World!\line Hello, World!\line\par } 

它确实添加了\line而不是\par 。

Answer 2

由于您想使用不同的RTF代码，我认为您可能需要忘记简单的AppendText（）方法并直接操作RichTextBox的.Rtf属性。 这是一个示例（测试）来演示：

 RichTextBox rtb = new RichTextBox(); //this just gets the textbox to populate its Rtf property... may not be necessary in typical usage rtb.AppendText("blah"); rtb.Clear(); string rtf = rtb.Rtf; //exclude the final } and anything after it so we can use Append instead of Insert StringBuilder richText = new StringBuilder(rtf, 0, rtf.LastIndexOf('}'), rtf.Length /* this capacity should be selected for the specific application */); for (int i = 0; i < 5; i++) { string lineText = "example text" + i; richText.Append(lineText); //add a \line and CRLF to separate this line of text from the next one richText.AppendLine(@"\line"); } //Add back the final } and newline richText.AppendLine("}"); System.Diagnostics.Debug.WriteLine("Original RTF data:"); System.Diagnostics.Debug.WriteLine(rtf); System.Diagnostics.Debug.WriteLine("New Data:"); System.Diagnostics.Debug.WriteLine(richText.ToString()); //Write the RTF data back into the RichTextBox. //WARNING - .NET will reformat the data to its liking at this point, removing //any unused colors from the color table and simplifying/standardizing the RTF. rtb.Rtf = richText.ToString(); //Print out the resulting Rtf data after .NET (potentially) reformats it System.Diagnostics.Debug.WriteLine("Resulting Data:"); System.Diagnostics.Debug.WriteLine(rtb.Rtf); 

输出：

原始RTF数据：

 {\ rtf1 \ ansi \ ansicpg1252 \ deff0 \ deflang1033 {\ fonttbl {\ f0 \ fnil \ fcharset0 Microsoft Sans Serif;}}
 \ viewkind4 \ UC1 \ PARD \ F0 \ fs17 \看齐
 }

新的RTF数据：

 {\ rtf1 \ ansi \ ansicpg1252 \ deff0 \ deflang1033 {\ fonttbl {\ f0 \ fnil \ fcharset0 Microsoft Sans Serif;}}
 \ viewkind4 \ UC1 \ PARD \ F0 \ fs17 \看齐
示例text0 \ line
示例text1 \ line
示例text2 \ line
示例text3 \ line
示例text4 \ line
 }

产生的RTF数据：

 {\ rtf1 \ ansi \ ansicpg1252 \ deff0 \ deflang1033 {\ fonttbl {\ f0 \ fnil \ fcharset0 Microsoft Sans Serif;}}
 \ viewkind4 \ UC1 \ PARD \ F0 \ fs17 \看齐
示例text0 \ line示例text1 \ line示例text2 \ line示例text3 \ line示例text4 \ par
 }

Answer 3

如果您使用段落写入richtextbox，您可以使用如下所示的LineBreak（）相同的代码

 Paragraph myParagraph = new Paragraph(); FlowDocument myFlowDocument = new FlowDocument(); // Add some Bold text to the paragraph myParagraph.Inlines.Add(new Bold(new Run(@"Test Description:"))); myParagraph.Inlines.Add(new LineBreak()); // to add a new line use LineBreak() myParagraph.Inlines.Add(new Run("my text")); myFlowDocument.Blocks.Add(myParagraph); myrichtextboxcontrolid.Document = myFlowDocument; 

希望这可以帮助！