我正在尝试“重置”我的RichTextBox(WinForms，而不是WPF)中的格式。我以前在用
richTextBox.Text = richTextBox.Text;
但是，这似乎突然让我失望了。现在，无论我将
richTextBox.Text设置为什么，它都保留了一些rtf格式。我试过了
richTextBox.Rtf = richTextBox.Text;
但是，这提示格式不正确。一定有更好的方法来做到这一点。 (当然，选择整个对象，然后重设背景色，前景色和字体，但是在选择整个对象然后取消选择整个对象时，这会导致闪烁，而且速度较慢，并且需要很多代码。)任何的想法？
编辑:
我已经做到这一点:
string tempTxt = richTextBox.Text;
richTextBox.Clear();
richTextBox.Text = tempTxt;
但是必须有更好的方法，对吗？
编辑2:
为了清楚起见，我希望在保留文本的同时删除所有格式。除非其他人拥有更有效/更好的编码方式，否则看起来第一次编辑中的代码将发布。
编辑3:
richTextBox.Text = richTextBox.Text.ToString();
似乎无法正常工作，因为它仍然无法清除所有格式。我不喜欢上面第一个“编辑”中的方法的原因是，当清除它时，它会使文本框“闪烁”，然后重新输入文本。似乎应该只应该有一个richTextBox.ResetFormatting()方法，或某种访问相同功能的方法，因为Clear()方法很明显(没有双关语)除了简单地清除所有文本外，还进行了某种格式的重置。 。
总结一下:
是否有一种方法(如果可以，它是什么)可以重置RichTextBox中文本的格式，而不必像上面的示例一样清除文本(因为这会产生不希望的闪烁)？
最佳答案
遗憾的是，我已经竭尽全力将其缩减为仅所需的代码。它仍然很大，但是可以工作。 .Net中的RichTextBox api非常有限，它几乎可以完成Win32库中的所有操作。我已经围绕此内容构建了一个完整的库，以便可以切换粗体并确定在选择中是否实际设置了粗体。
用法:
RichTextBox te = ...;
te.ClearAllFormatting(new Font("Microsoft Sans Serif", 8.25f));
大量代码:
static class RichTextExtensions
{
public static void ClearAllFormatting(this RichTextBox te, Font font)
{
CHARFORMAT2 fmt = new CHARFORMAT2();
fmt.cbSize = Marshal.SizeOf(fmt);
fmt.dwMask = CFM_ALL2;
fmt.dwEffects = CFE_AUTOCOLOR | CFE_AUTOBACKCOLOR;
fmt.szFaceName = font.FontFamily.Name;
double size = font.Size;
size /= 72;//logical dpi (pixels per inch)
size *= 1440.0;//twips per inch
fmt.yHeight = (int)size;//165
fmt.yOffset = 0;
fmt.crTextColor = 0;
fmt.bCharSet = 1;// DEFAULT_CHARSET;
fmt.bPitchAndFamily = 0;// DEFAULT_PITCH;
fmt.wWeight = 400;// FW_NORMAL;
fmt.sSpacing = 0;
fmt.crBackColor = 0;
//fmt.lcid = ???
fmt.dwMask &= ~CFM_LCID;//don't know how to get this...
fmt.dwReserved = 0;
fmt.sStyle = 0;
fmt.wKerning = 0;
fmt.bUnderlineType = 0;
fmt.bAnimation = 0;
fmt.bRevAuthor = 0;
fmt.bReserved1 = 0;
SendMessage(te.Handle, EM_SETCHARFORMAT, SCF_ALL, ref fmt);
}
private const UInt32 WM_USER = 0x0400;
private const UInt32 EM_GETCHARFORMAT = (WM_USER + 58);
private const UInt32 EM_SETCHARFORMAT = (WM_USER + 68);
private const UInt32 SCF_ALL = 0x0004;
private const UInt32 SCF_SELECTION = 0x0001;
[DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = false)]
static extern IntPtr SendMessage(IntPtr hWnd, UInt32 Msg, UInt32 wParam, ref CHARFORMAT2 lParam);
[StructLayout(LayoutKind.Sequential, Pack = 4, CharSet = CharSet.Auto)]
struct CHARFORMAT2
{
public int cbSize;
public uint dwMask;
public uint dwEffects;
public int yHeight;
public int yOffset;
public int crTextColor;
public byte bCharSet;
public byte bPitchAndFamily;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 32)]
public string szFaceName;
public short wWeight;
public short sSpacing;
public int crBackColor;
public int lcid;
public int dwReserved;
public short sStyle;
public short wKerning;
public byte bUnderlineType;
public byte bAnimation;
public byte bRevAuthor;
public byte bReserved1;
}
#region CFE_
// CHARFORMAT effects
const UInt32 CFE_BOLD = 0x0001;
const UInt32 CFE_ITALIC = 0x0002;
const UInt32 CFE_UNDERLINE = 0x0004;
const UInt32 CFE_STRIKEOUT = 0x0008;
const UInt32 CFE_PROTECTED = 0x0010;
const UInt32 CFE_LINK = 0x0020;
const UInt32 CFE_AUTOCOLOR = 0x40000000; // NOTE: this corresponds to
// CFM_COLOR, which controls it
// Masks and effects defined for CHARFORMAT2 -- an (*) indicates
// that the data is stored by RichEdit 2.0/3.0, but not displayed
const UInt32 CFE_SMALLCAPS = CFM_SMALLCAPS;
const UInt32 CFE_ALLCAPS = CFM_ALLCAPS;
const UInt32 CFE_HIDDEN = CFM_HIDDEN;
const UInt32 CFE_OUTLINE = CFM_OUTLINE;
const UInt32 CFE_SHADOW = CFM_SHADOW;
const UInt32 CFE_EMBOSS = CFM_EMBOSS;
const UInt32 CFE_IMPRINT = CFM_IMPRINT;
const UInt32 CFE_DISABLED = CFM_DISABLED;
const UInt32 CFE_REVISED = CFM_REVISED;
// CFE_AUTOCOLOR and CFE_AUTOBACKCOLOR correspond to CFM_COLOR and
// CFM_BACKCOLOR, respectively, which control them
const UInt32 CFE_AUTOBACKCOLOR = CFM_BACKCOLOR;
#endregion
#region CFM_
// CHARFORMAT masks
const UInt32 CFM_BOLD = 0x00000001;
const UInt32 CFM_ITALIC = 0x00000002;
const UInt32 CFM_UNDERLINE = 0x00000004;
const UInt32 CFM_STRIKEOUT = 0x00000008;
const UInt32 CFM_PROTECTED = 0x00000010;
const UInt32 CFM_LINK = 0x00000020; // Exchange hyperlink extension
const UInt32 CFM_SIZE = 0x80000000;
const UInt32 CFM_COLOR = 0x40000000;
const UInt32 CFM_FACE = 0x20000000;
const UInt32 CFM_OFFSET = 0x10000000;
const UInt32 CFM_CHARSET = 0x08000000;
const UInt32 CFM_SMALLCAPS = 0x0040; // (*)
const UInt32 CFM_ALLCAPS = 0x0080; // Displayed by 3.0
const UInt32 CFM_HIDDEN = 0x0100; // Hidden by 3.0
const UInt32 CFM_OUTLINE = 0x0200; // (*)
const UInt32 CFM_SHADOW = 0x0400; // (*)
const UInt32 CFM_EMBOSS = 0x0800; // (*)
const UInt32 CFM_IMPRINT = 0x1000; // (*)
const UInt32 CFM_DISABLED = 0x2000;
const UInt32 CFM_REVISED = 0x4000;
const UInt32 CFM_BACKCOLOR = 0x04000000;
const UInt32 CFM_LCID = 0x02000000;
const UInt32 CFM_UNDERLINETYPE = 0x00800000; // Many displayed by 3.0
const UInt32 CFM_WEIGHT = 0x00400000;
const UInt32 CFM_SPACING = 0x00200000; // Displayed by 3.0
const UInt32 CFM_KERNING = 0x00100000; // (*)
const UInt32 CFM_STYLE = 0x00080000; // (*)
const UInt32 CFM_ANIMATION = 0x00040000; // (*)
const UInt32 CFM_REVAUTHOR = 0x00008000;
const UInt32 CFE_SUBSCRIPT = 0x00010000; // Superscript and subscript are
const UInt32 CFE_SUPERSCRIPT = 0x00020000; // mutually exclusive
const UInt32 CFM_SUBSCRIPT = (CFE_SUBSCRIPT | CFE_SUPERSCRIPT);
const UInt32 CFM_SUPERSCRIPT = CFM_SUBSCRIPT;
// CHARFORMAT "ALL" masks
const UInt32 CFM_EFFECTS = (CFM_BOLD | CFM_ITALIC | CFM_UNDERLINE | CFM_COLOR |
CFM_STRIKEOUT | CFE_PROTECTED | CFM_LINK);
const UInt32 CFM_ALL = (CFM_EFFECTS | CFM_SIZE | CFM_FACE | CFM_OFFSET | CFM_CHARSET);
const UInt32 CFM_EFFECTS2 = (CFM_EFFECTS | CFM_DISABLED | CFM_SMALLCAPS | CFM_ALLCAPS
| CFM_HIDDEN | CFM_OUTLINE | CFM_SHADOW | CFM_EMBOSS
| CFM_IMPRINT | CFM_DISABLED | CFM_REVISED
| CFM_SUBSCRIPT | CFM_SUPERSCRIPT | CFM_BACKCOLOR);
const UInt32 CFM_ALL2 = (CFM_ALL | CFM_EFFECTS2 | CFM_BACKCOLOR | CFM_LCID
| CFM_UNDERLINETYPE | CFM_WEIGHT | CFM_REVAUTHOR
| CFM_SPACING | CFM_KERNING | CFM_STYLE | CFM_ANIMATION);
#endregion
}
您还问什么？
我通过一个小的实用程序类来使用大部分内容，该实用程序类将其包装为所有样式和字体更改。这样，您可以更改字体大小，而不更改字体名称，等等。
class RichTextStyle
{
private readonly Control _textEdit;
private readonly CHARFORMAT2 _charFormat;
public RichTextStyle(RichTextBox te)
{
_textEdit = te;
_charFormat = new CHARFORMAT2();
_charFormat.cbSize = Marshal.SizeOf(_charFormat);
SendMessage(te.Handle, EM_GETCHARFORMAT, SCF_SELECTION, ref _charFormat);
}
private void SetEffect(UInt32 mask, UInt32 effect, bool valid)
{
CHARFORMAT2 fmt = new CHARFORMAT2();
fmt.cbSize = Marshal.SizeOf(fmt);
fmt.dwMask = mask;
fmt.dwEffects = valid ? effect : 0;
SendMessage(_textEdit.Handle, EM_SETCHARFORMAT, SCF_SELECTION, ref fmt);
}
private bool GetEffect(UInt32 mask, UInt32 effect)
{
return (0 != (_charFormat.dwMask & mask)) && (0 != (_charFormat.dwEffects & effect));
}
public bool Bold { get { return GetEffect(CFM_BOLD, CFE_BOLD); } set { SetEffect(CFM_BOLD, CFE_BOLD, value); } }
public bool Italic { get { return GetEffect(CFM_ITALIC, CFE_ITALIC); } set { SetEffect(CFM_ITALIC, CFE_ITALIC, value); } }
// ... etc ... etc ... you get the idea.
关于c# - 重置RichTextBox中的RTF？，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/1268009/