.NET Framework：如何使RichTextBox成为真正的只读？

将RichTextBox设置为“ReadOnly”不会阻止双击嵌入对象（如方程）进行编辑。我可以禁用控件，但是有一个灰色的背景（不能只是改变背景色），无法滚动。我试图在派生类中重写OnDoubleClick，但没有成功。

嗯。。。只需在双击时尝试将Sellength设置为0。没有只读/锁定属性吗？

嗯。。。只需在双击时尝试将Sellength设置为0。难道没有只读/锁定属性吗？

我找到了一个解决方案！：）在派生类中：

protected override void WndProc(ref Message m)
    {
        if (m.Msg == 0x0203) // WM_LBUTTONDBLCLK
        {
            // Do nothing
        }
        else
        {
            base.WndProc(ref m);
        }
    }

我找到了解决办法！：）在派生类中：

protected override void WndProc(ref Message m)
    {
        if (m.Msg == 0x0203) // WM_LBUTTONDBLCLK
        {
            // Do nothing
        }
        else
        {
            base.WndProc(ref m);
        }
    }

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这可以按如下方式进行

1） 将RichTextBox属性ReadOnly设置为true

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2） 转到属性->外观->背景色并将颜色设置为窗口

这可以按如下方式完成

1） 将RichTextBox属性ReadOnly设置为true

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2） 转到属性->外观->背景色并将颜色设置为窗口

我遇到了类似的问题，来自Entrase的答案是一个良好的开始。不幸的是，控件仍然允许选择文本并将其删除。我最终使用了以下代码：

Public Class ReadOnlyRichTextBox : Inherits Windows.Forms.RichTextBox

    Protected mOkayKeys As Windows.Forms.Keys() = {Windows.Forms.Keys.Up, Windows.Forms.Keys.Down, Windows.Forms.Keys.PageUp, Windows.Forms.Keys.PageDown}

    Private Sub ReadOnlyRichTextBox_KeyDown(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles Me.KeyDown
        If e.Control And (e.KeyCode = Windows.Forms.Keys.C) Then
            Exit Sub
        End If
        If Not mOkayKeys.Contains(e.KeyCode) Then e.Handled = True
    End Sub

    Private Sub ReadOnlyRichTextBox_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles Me.KeyPress
        e.Handled = True
    End Sub

    Private Sub ReadOnlyRichTextBox_KeyUp(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles Me.KeyUp
        If e.Control And (e.KeyCode = Windows.Forms.Keys.C) Then
            Exit Sub
        End If
        If Not mOkayKeys.Contains(e.KeyCode) Then e.Handled = True
    End Sub

    Protected Overrides Sub WndProc(ByRef m As Windows.Forms.Message)
        If (m.Msg = &H203) Then ' WM_LBUTTONDBLCLK=0x0203
            ' Do nothing
        Else
            MyBase.WndProc(m)
        End If
    End Sub

End Class

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我有一个类似的问题，恩特雷斯的回答是一个好的开始。不幸的是，控件仍然允许选择文本并将其删除。我最终使用了以下代码：

Public Class ReadOnlyRichTextBox : Inherits Windows.Forms.RichTextBox

    Protected mOkayKeys As Windows.Forms.Keys() = {Windows.Forms.Keys.Up, Windows.Forms.Keys.Down, Windows.Forms.Keys.PageUp, Windows.Forms.Keys.PageDown}

    Private Sub ReadOnlyRichTextBox_KeyDown(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles Me.KeyDown
        If e.Control And (e.KeyCode = Windows.Forms.Keys.C) Then
            Exit Sub
        End If
        If Not mOkayKeys.Contains(e.KeyCode) Then e.Handled = True
    End Sub

    Private Sub ReadOnlyRichTextBox_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles Me.KeyPress
        e.Handled = True
    End Sub

    Private Sub ReadOnlyRichTextBox_KeyUp(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles Me.KeyUp
        If e.Control And (e.KeyCode = Windows.Forms.Keys.C) Then
            Exit Sub
        End If
        If Not mOkayKeys.Contains(e.KeyCode) Then e.Handled = True
    End Sub

    Protected Overrides Sub WndProc(ByRef m As Windows.Forms.Message)
        If (m.Msg = &H203) Then ' WM_LBUTTONDBLCLK=0x0203
            ' Do nothing
        Else
            MyBase.WndProc(m)
        End If
    End Sub

End Class

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不。它将处理双击而不提及选择。正如我所说，“只读”属性没有帮助。它将处理双击而不提及选择。正如我所说的，“ReadOnly”属性没有帮助，或者只是将locked属性设置为true，或者只是将locked属性设置为true