RichTextBox RTF问题

Question

我在Win窗体应用程序中有一个RichTextBox，它具有格式化功能，如粗体，斜体，对齐方式等选项，右键单击RTB会打开ContexttoolStripmenu，并带有从数据库插入客户端地址的选项，该选项会在RTB文本中插入字符串"$[ClientAddress]" 。 单击保存按钮后， $[ClientAddress]被替换为数据库中的实际地址（rtf格式，如下所示：

string rtfText = richTextBox.Rtf;
rtfText = rtfText.Replace("$[ClientAddress]", $address);

这里的问题是，当富文本框中的“ $ [ClientAddress]”上完成的所有格式/样式替换为数据库中的实际地址字符串（rtf格式）时，都将丢失。

我们如何将$ [ClientAddress]上携带的样式（格式）传递给替换$ [ClientAddress]的文本。

如果将地址作为纯文本而不是数据库中的rtf文本传递，则格式保持不变，但丢失了不同地址行之间的换行符，并且地址以一条直线打印，例如：

39 East Tamaki Road, Papatoetoe, Auckland, New Zealand instead of the correct way as below as originally entered :
39 East Tamaki Road
Papatoetoe
Auckland
New Zealand

我希望我能够弄清楚我的问题。

Answer 1

您是否考虑过将旧内容从剪贴板中删除？

下面是带有Richtextbox（rtb1）和一个按钮（button1）的winform的概念验证。 抱歉，在VB中...

Public Class Form1

  Private Sub Button1_Click(sender As System.Object, e As System.EventArgs) Handles Button1.Click

    ' This Richtextbox just to create the text that's in the database.

    Dim rtb2 As New RichTextBox

    rtb2.Text = "39 East Tamaki Road" & vbCrLf & "Papatoetoe" & vbCrLf & "Auckland, New Zealand"
    rtb2.SelectAll()
    rtb2.SelectionFont = New Font("Courier", 20)
    rtb2.SelectionColor = Color.Blue


    ' This would be Clipboard.SetData(TextDataFormat.Rtf, $address)

    Clipboard.SetData(TextDataFormat.Rtf, rtb2.SelectedRtf)

    rtb2.DeselectAll()
    rtb2.Clear()


    ' This is adding text to an existing richtextbox and then pasting in the replacement text.
    Dim sPlaceHolder As String = "$[ClientAddress]"

    rtb1.Clear()

    rtb1.Text = "This is some random text plus the whole " & vbCrLf & sPlaceHolder & vbCrLf & "Place holder above."
    rtb1.SelectAll()
    rtb1.SelectionFont = New Font("Arial", 10)
    rtb1.SelectionColor = Color.DarkRed
    rtb1.DeselectAll()

    Dim istart As Integer = rtb1.Find(sPlaceHolder)
    Dim ilength As Integer = sPlaceHolder.Length

    rtb1.SelectionStart = istart
    rtb1.SelectionLength = ilength

    rtb1.SelectedRtf = Clipboard.GetData(TextDataFormat.Rtf)


  End Sub
End Class