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在RichTextBox中重置RTF?

[英]Reset RTF in RichTextBox?

我正在尝试“重置”我的RichTextBox格式(WinForms,而不是WPF)。 我以前用过

richTextBox.Text = richTextBox.Text;

然而,这似乎突然让我失望了。 现在无论我将richTextBox.Text设置richTextBox.Text ,它都会保留一些rtf格式。

我试过了

richTextBox.Rtf = richTextBox.Text;

但是,抱怨格式不正确。 必须有一个更好的方法来做到这一点。 (当然,选择整个事物,然后重置背面颜色,前颜色和字体工作,但这会导致闪烁,因为选择整个事物然后取消选择,加上它更慢并且需要更多代码。)任何人都有任何想法?

编辑:我已经得到了这个工作:

string tempTxt = richTextBox.Text;
richTextBox.Clear();
richTextBox.Text = tempTxt;

但必须有更好的方法,对吗?

编辑2:要清楚,我希望在保留文本的同时删除所有格式。 看起来第一次编辑中的代码将会发布,除非其他人有更高效/更好的编码方式。

编辑3:

richTextBox.Text = richTextBox.Text.ToString();

似乎没有用,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,当文本框清除它然后重新输入文本时,它会使文本框“闪烁”。 看起来应该只是一个richTextBox.ResetFormatting()方法,或者某种方式来访问相同的功能,因为Clear()方法清楚(没有双关语)除了简单地清除所有文本之外还会进行某种格式化重置。

总结一下:

是否有一种方法(如果是这样,是什么)重置RichTextBox中文本的格式而不清除上面示例中的文本(因为这会产生不希望的闪烁)?

可悲的是,我已尽最大努力将其减少到只需要的代码。 它仍然很大,但它会起作用。 .Net中的RichTextBox api是非常有限的,可以做任何你几乎要进入Win32库的东西。 我已经围绕这个东西构建了一个完整的库,所以我可以切换粗体并确定是否在选择中实际设置了粗体。

用法:

RichTextBox te = ...;
te.ClearAllFormatting(new Font("Microsoft Sans Serif", 8.25f));

大量的代码:

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
}

你问的更多?

我通过一个小的实用程序类来使用大部分内容,该实用程序类包含了所有样式和字体更改。 这样您就可以更改字体大小而不更改字体名称等。

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.

关于什么

richTextBox.Text = richTextBox.Text.ToString();

我用过

var t = richTextBox1.Text;
richTextBox1.Text = t; 

编辑::

一定要插入评论,说明你为什么要做你正在做的事情。 对于不知不觉,它看起来很荒谬。

只是使用:

richTextBox1.Clear();

......应该做的伎俩。 适合我。

有一段时间,我一直在自己的程序中使用这段代码。 它直接设置RichTextBox的RTF,因此应该比通常的方式设置样式快得多。 它接受一个字符串(主文本),并且可选地还采用Color数组,字体大小数组(int)和font-weight数组(bool),每个数组代表每个字符的每个颜色,大小或字体权重。字符串。

或者,您可以简单地保留标题给出的默认大小,重量和斜体数字。

public string text2RTF(string text, Color[] color = null, bool[] bold = null, int[] size = null,
                        string font = "Microsoft Sans Serif", double defaultFontSize = 16,
                        bool defaultFontBold = false, bool defaultFontItalic = false, char align = 'l')
{
    StringBuilder rtf = new StringBuilder();
    rtf.Append(@"{\rtf1\ansi\ansicpg1252\deff0\deflang2057{\fonttbl{\f0\fnil\fcharset0 ");
    rtf.Append(font);
    rtf.Append(@";}}{\colortbl ;");

    if (color != null)
    {
        rtf.Append("\\red" + (color[0].R).ToString() + "\\green" + (color[0].G).ToString() + "\\blue" + (color[0].B).ToString() + ";");
        for (int i = 1; i < text.Length; i++)
        {
            if ((color[i].R != color[i - 1].R || color[i].G != color[i - 1].G || color[i].B != color[i - 1].B))
            {
                rtf.Append("\\red" + (color[i].R).ToString() + "\\green" + (color[i].G).ToString() + "\\blue" + (color[i].B).ToString() + ";");
            }
        }
    }


    rtf.Append("}\n\\viewkind4\\uc1\\pard");
    if (defaultFontBold == true) rtf.Append("\\b");
    if (defaultFontItalic == true) rtf.Append("\\i");

    if (align == 'r')   rtf.Append("\\qr");

    rtf.Append("\\f0\\fs" + (Math.Round(defaultFontSize)).ToString()+" ");
    int startOfActualText = rtf.Length;

    int count = 1;
    for (int i = 0; i < text.Length; i++)
    {
        if (color!=null && (i == 0 || color[i].R != color[i - 1].R || color[i].G != color[i - 1].G || color[i].B != color[i - 1].B))
        {
            rtf.Append("\\cf"); rtf.Append(count.ToString() + " "); count++;
        }
        if (bold!=null && (i == 0 || bold[i] != bold[i - 1]))
        {
            if (bold[i] == true) rtf.Append("\\b1 ");
            else rtf.Append("\\b0 ");
        }
        if (size!=null && (i == 0 || size[i] != size[i - 1]))
        {
            rtf.Append("\\fs"+size[i].ToString()+" " );                 
        }

        if (text[i] == '\\' || text[i] == '}' || text[i] == '{') rtf.Append('\\');

        // GetRtfUnicodeOfChar:
        string st="";
        if (text[i] <= 0x7f) st = text[i].ToString();
        else st = "\\u" + Convert.ToUInt32(text[i]) + "?";


        rtf.Append(st);
    }

    rtf.Append("\n}");
    rtf.Replace("\n", "\\par\n", startOfActualText, rtf.Length - startOfActualText);


    return rtf.ToString();

}

我看到有很多答案,但我认为有更简单易用的方法作为清除所有格式的扩展:

在我的情况下,我需要清除格式并留下一个空的RichTextBox ,因此我做了这个函数:

private void ClearRichTextBox()
{
  this.richTextBox1.ForeColor = Color.Empty;
  this.richTextBox1.BackColor = Color.Empty;
  this.richTextBox1.SelectAll();
  this.richTextBox1.SelectionColor = Color.Empty;
  this.richTextBox1.SelectionBackColor = Color.Empty;
  this.richTextBox1.SelectionFont = this.richTextBox1.Font;
  this.richTextBox1.Clear();
}

然后简单的解决方案是:

string backUp = this.richTextBox1.Text;
ClearRichTextBox();
this.richTextBox1.Text = backUp;

或者只是删除this.richTextBox1.Clear(); 行中的明确功能。 (这可能也有用,但我不保证,因为我只在简单的格式化上测试过。因此可以是,应该添加任何其他行来删除不同的格式。)

当文本不清除时,记得在格式化数据后存储先前的位置/选择和刷新状态。

我发现的另一种方式(以及我已经切换到使用的方式,因为它不闪存)是在应用任何格式之前获取初始rtf字符串:

string initialRtf = richTextBox.Rtf;

然后,当我想重置格式时,我可以这样做:

richTextBox.Rtf = initialRtf;

但是,这并不是很完美,因为它要求文本保持不变等。 好吧,至少它比问题中详述的方法好一点。

“我不喜欢上面第一个编辑中的方法的原因是,当文本框清除它然后重新输入文本时,它会使文本框”闪烁“。

您应该能够实现SuspendLayout()和ResumeLayout()方法。

string tempTxt = richTextBox.Text;
rtbIncludes.SuspendLayout();
richTextBox.Clear();
richTextBox.Text = tempTxt;
rtbIncludes.ResumeLayout();

在操作数据时,SuspendLayout()和ResumeLayout()将停止控件的绘制。 如果操作时间不长,您将能够清除文本并将未格式化的文本分配回来,而不会显示在屏幕上闪烁。

如果确实花了太长时间,控件将显示为黑色矩形,直到调用ResumeLayout()。

RichTextBox rtbTemp = new RichTextBox();
rtbTemp.Text = rtb.Text;
rtb.Rtf = rtbTemp.Rtf;

希望它有效

工作正常 ..

var TempString = richTextBox1.Text;
richTextBox1.Rtf = string.Empty;
richTextBox1.Text = TempString ;

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