簡體   English   中英

在RichTextBox中重置RTF?

[英]Reset RTF in RichTextBox?

我正在嘗試“重置”我的RichTextBox格式(WinForms,而不是WPF)。 我以前用過

richTextBox.Text = richTextBox.Text;

然而,這似乎突然讓我失望了。 現在無論我將richTextBox.Text設置richTextBox.Text ,它都會保留一些rtf格式。

我試過了

richTextBox.Rtf = richTextBox.Text;

但是,抱怨格式不正確。 必須有一個更好的方法來做到這一點。 (當然,選擇整個事物,然后重置背面顏色,前顏色和字體工作,但這會導致閃爍,因為選擇整個事物然后取消選擇,加上它更慢並且需要更多代碼。)任何人都有任何想法?

編輯:我已經得到了這個工作:

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

但必須有更好的方法,對嗎?

編輯2:要清楚,我希望在保留文本的同時刪除所有格式。 看起來第一次編輯中的代碼將會發布,除非其他人有更高效/更好的編碼方式。

編輯3:

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

似乎沒有用,因為它仍然無法清除所有格式。 我不喜歡上面第一個編輯中的方法的原因是,當文本框清除它然后重新輸入文本時,它會使文本框“閃爍”。 看起來應該只是一個richTextBox.ResetFormatting()方法,或者某種方式來訪問相同的功能,因為Clear()方法清楚(沒有雙關語)除了簡單地清除所有文本之外還會進行某種格式化重置。

總結一下:

是否有一種方法(如果是這樣,是什么)重置RichTextBox中文本的格式而不清除上面示例中的文本(因為這會產生不希望的閃爍)?

可悲的是,我已盡最大努力將其減少到只需要的代碼。 它仍然很大,但它會起作用。 .Net中的RichTextBox api是非常有限的,可以做任何你幾乎要進入Win32庫的東西。 我已經圍繞這個東西構建了一個完整的庫,所以我可以切換粗體並確定是否在選擇中實際設置了粗體。

用法:

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

大量的代碼:

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
}

你問的更多?

我通過一個小的實用程序類來使用大部分內容,該實用程序類包含了所有樣式和字體更改。 這樣您就可以更改字體大小而不更改字體名稱等。

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.

關於什么

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

我用過

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

編輯::

一定要插入評論,說明你為什么要做你正在做的事情。 對於不知不覺,它看起來很荒謬。

只是使用:

richTextBox1.Clear();

......應該做的伎倆。 適合我。

有一段時間,我一直在自己的程序中使用這段代碼。 它直接設置RichTextBox的RTF,因此應該比通常的方式設置樣式快得多。 它接受一個字符串(主文本),並且可選地還采用Color數組,字體大小數組(int)和font-weight數組(bool),每個數組代表每個字符的每個顏色,大小或字體權重。字符串。

或者,您可以簡單地保留標題給出的默認大小,重量和斜體數字。

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,但我認為有更簡單易用的方法作為清除所有格式的擴展:

在我的情況下,我需要清除格式並留下一個空的RichTextBox ,因此我做了這個函數:

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();
}

然后簡單的解決方案是:

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

或者只是刪除this.richTextBox1.Clear(); 行中的明確功能。 (這可能也有用,但我不保證,因為我只在簡單的格式化上測試過。因此可以是,應該添加任何其他行來刪除不同的格式。)

當文本不清除時,記得在格式化數據后存儲先前的位置/選擇和刷新狀態。

我發現的另一種方式(以及我已經切換到使用的方式,因為它不閃存)是在應用任何格式之前獲取初始rtf字符串:

string initialRtf = richTextBox.Rtf;

然后,當我想重置格式時,我可以這樣做:

richTextBox.Rtf = initialRtf;

但是,這並不是很完美,因為它要求文本保持不變等。 好吧,至少它比問題中詳述的方法好一點。

“我不喜歡上面第一個編輯中的方法的原因是,當文本框清除它然后重新輸入文本時,它會使文本框”閃爍“。

您應該能夠實現SuspendLayout()和ResumeLayout()方法。

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

在操作數據時,SuspendLayout()和ResumeLayout()將停止控件的繪制。 如果操作時間不長,您將能夠清除文本並將未格式化的文本分配回來,而不會顯示在屏幕上閃爍。

如果確實花了太長時間,控件將顯示為黑色矩形,直到調用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 ;

暫無
暫無

聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.

 
粵ICP備18138465號  © 2020-2024 STACKOOM.COM