我在C＃应用程序中使用Rich Text对象。我遇到的唯一问题是，当用户从另一个应用程序粘贴格式化文本时，它仍然是我不能拥有的格式。有没有办法如何只粘贴字符串并忽略格式？谢谢！
假设WinForms：尝试这个：使用KeyDown事件处理程序定义一个RichTextBox，如下所示：
仅附加示例：
private void richTextBox1_KeyDown(object sender, KeyEventArgs e)
{
if (e.Control && e.KeyCode == Keys.V)
{
richTextBox1.Text += (string)Clipboard.GetData("Text");
e.Handled = true;
}
}
[编辑]
在当前插入点（选择开始）示例中将剪贴板RTF添加到RichTextBox：
private void richTextBox1_KeyDown(object sender, KeyEventArgs e)
{
if (e.Control && e.KeyCode == Keys.V)
{
// suspend layout to avoid blinking
richTextBox2.SuspendLayout();
// get insertion point
int insPt = richTextBox2.SelectionStart;
// preserve text from after insertion pont to end of RTF content
string postRTFContent = richTextBox2.Text.Substring(insPt);
// remove the content after the insertion point
richTextBox2.Text = richTextBox2.Text.Substring(0, insPt);
// add the clipboard content and then the preserved postRTF content
richTextBox2.Text += (string)Clipboard.GetData("Text") + postRTFContent;
// adjust the insertion point to just after the inserted text
richTextBox2.SelectionStart = richTextBox2.TextLength - postRTFContent.Length;
// restore layout
richTextBox2.ResumeLayout();
// cancel the paste
e.Handled = true;
}
}
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注意0：粘贴的文本将假设当前样式设置对RichTextBox有效：如果您将'ForeGround颜色设置为'蓝色：粘贴的文本将为蓝色。
注1：这是我快速拼凑的东西，并且通过使用写字板为剪贴板创建一些多色和奇怪格式的RTF进行了几次测试：然后在运行时粘贴到RichTextBox1中：它确实剥离了所有的颜色，缩进等
由于未经过全面测试，请谨慎使用。
注2：显然，这不会处理“插入”或“通过上下文菜单粘贴”的情况。
欢迎对这个答案的所有批评，如果它不是“标记”，将立即将其删除。
向KeyDown事件添加处理程序以拦截标准粘贴并手动仅插入纯文本：
private void rtb_KeyDown(object sender, KeyEventArgs e)
{
if (e.Control && e.KeyCode == Keys.V)
{
((RichTextBox)sender).Paste(DataFormats.GetFormat("Text"));
e.Handled = true;
}
}
我正在寻找一个纯文本richtextbox但没有在网上找到解决方案。
为什么纯文本只有RichTextBox而不是TextBox？例如，因为RichTextBox具有可用的撤消/重做功能等等。
最后我通过挖掘richedit控件的C头文件找到了一个完美的解决方案：一个RichTextBox可以切换到明文模式，之后它不接受格式化的文本和图像以及来自剪贴板的类似的东西，行为就像一个普通的TextBox formattingwise。无法粘贴图像等奇特的东西，并通过删除格式来粘贴格式化文本。
class PlainRichTextBox : RichTextBox
{
const int WM_USER = 0x400;
const int EM_SETTEXTMODE = WM_USER + 89;
const int EM_GETTEXTMODE = WM_USER + 90;
// EM_SETTEXTMODE/EM_GETTEXTMODE flags
const int TM_PLAINTEXT = 1;
const int TM_RICHTEXT = 2; // Default behavior
const int TM_SINGLELEVELUNDO = 4;
const int TM_MULTILEVELUNDO = 8; // Default behavior
const int TM_SINGLECODEPAGE = 16;
const int TM_MULTICODEPAGE = 32; // Default behavior
[DllImport("user32.dll")]
static extern IntPtr SendMessage(IntPtr hWnd, int wMsg, IntPtr wParam, IntPtr lParam);
bool m_PlainTextMode;
// If this property doesn't work for you from the designer for some reason
// (for example framework version...) then set this property from outside
// the designer then uncomment the Browsable and DesignerSerializationVisibility
// attributes and set the Property from your component initializer code
// that runs after the designer's code.
[DefaultValue(false)]
//[Browsable(false)]
//[DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
public bool PlainTextMode
{
get
{
return m_PlainTextMode;
}
set
{
m_PlainTextMode = value;
if (IsHandleCreated)
{
IntPtr mode = value ? (IntPtr)TM_PLAINTEXT : (IntPtr)TM_RICHTEXT;
SendMessage(Handle, EM_SETTEXTMODE, mode, IntPtr.Zero);
}
}
}
protected override void OnHandleCreated(EventArgs e)
{
// For some reason it worked for me only if I manipulated the created
// handle before calling the base method.
PlainTextMode = m_PlainTextMode;
base.OnHandleCreated(e);
}
}
pasztorpisti的答案对我来说就像一个魅力。由于我正在使用vb.net，我以为我会为其他人发布我的翻译代码：
Imports System.Runtime.InteropServices
Imports System.ComponentModel
Public Class MyRichTextBox
Inherits Windows.Forms.RichTextBox
Public Const WM_USER As Integer = &H400
Public Const EM_SETTEXTMODE As Integer = WM_USER + 89
Public Const EM_GETTEXTMODE As Integer = WM_USER + 90
'EM_SETTEXTMODE/EM_GETTEXTMODE flags
Public Const TM_PLAINTEXT As Integer = 1
Public Const TM_RICHTEXT As Integer = 2 ' Default behavior
Public Const TM_SINGLELEVELUNDO As Integer = 4
Public Const TM_MULTILEVELUNDO As Integer = 8 ' Default behavior
Public Const TM_SINGLECODEPAGE As Integer = 16
Public Const TM_MULTICODEPAGE As Integer = 32 ' Default behavior
<DllImport("user32.dll", SetLastError:=True, CharSet:=CharSet.Auto)> _
Private Shared Function SendMessage(ByVal hWnd As IntPtr, ByVal Msg As UInteger, ByVal wParam As IntPtr, ByVal lParam As IntPtr) As IntPtr
End Function
Private _plainTextMode As Boolean = False
<DefaultValue(False),
Browsable(True)>
Public Property PlainTextMode As Boolean
Get
Return _plainTextMode
End Get
Set(value As Boolean)
_plainTextMode = value
If (Me.IsHandleCreated) Then
Dim mode As IntPtr = If(value, TM_PLAINTEXT, TM_RICHTEXT)
SendMessage(Handle, EM_SETTEXTMODE, mode, IntPtr.Zero)
End If
End Set
End Property
Protected Overrides Sub OnHandleCreated(e As EventArgs)
'For some reason it worked for me only if I manipulated the created
'handle before calling the base method.
Me.PlainTextMode = _plainTextMode
MyBase.OnHandleCreated(e)
End Sub
End Class
那么RichTextBox有一个SelectionFont属性，所以你可以做以下事情：
Font courier;
courier = new Font("Courier new", 10f, FontStyle.Regular);
myRtb.SelectionFont = courier;
myRtb.Font = courier; //So the typed text is also the same font
如果文本被粘贴，它将自动格式化。
你也可以使用
private void richTextBox1_KeyDown(object sender, KeyEventArgs e)
{
if (e.Control && e.KeyCode == Keys.V)
{
richTextBox1.SelectedText = (string)Clipboard.GetData("Text");
e.Handled = true;
}
}
我通过在更改内容时修改整个RTB的字体和颜色来实现这一点。这对我来说很好，因为输入框不需要处理大量的文本。
public FormMain()
{
InitializeComponent();
txtRtb.TextChanged += txtRtb_TextChanged;
}
void txtRtb_TextChanged(object sender, EventArgs e)
{
RichTextBox rtb = (RichTextBox)sender;
rtb.SelectAll();
rtb.SelectionFont = rtb.Font;
rtb.SelectionColor = System.Drawing.SystemColors.WindowText;
rtb.Select(rtb.TextLength,0);
}
我的解决方案
private void OnCommandExecuting(object sender, Telerik.Windows.Documents.RichTextBoxCommands.CommandExecutingEventArgs e)
{
if (e.Command is PasteCommand)
{
//override paste when clipboard comes from out of RichTextBox (plain text)
var documentFromClipboard = ClipboardEx.GetDocumentFromClipboard("RadDocumentGUID");
if (documentFromClipboard == null)
{
(sender as RichTextBox).Insert(Clipboard.GetText());
e.Cancel = true;
}
}
}
很简单，但是当应用程序打开时，剪贴板中的所有内容都是纯文本。
private void timer2_Tick(object sender, EventArgs e)
{
string paste = Clipboard.GetText();
Clipboard.SetText(paste);
}