[英]How to determine the font color of the active document opened using word office interop in c#?
我有這個代碼
Word.Application WordApp = new Word.Application();
WordApp.Visible = true;
aDoc = WordApp.Documents.Open(fileName, ReadOnly: readOnly, Visible: isVisible);
aDoc.Activate();
我想確定打開的文檔中使用的字體顏色，有沒有辦法做到這一點？ 謝謝！
可能沒有一種顏色用於所有文本。 但是，您可以訪問顏色信息，維護每種顏色的出現次數，然后選擇最大值。
基本思想是，對於每個Range ，獲取Font ，對於每個Font ，使用其Color屬性。 訪問范圍時，似乎選擇是遍歷字符。 也許有更好的方法，但是我找不到。 對我來說，遍歷每個字符范圍以獲取其顏色似乎有點效率低下，而訪問具有相同樣式或顏色格式的連續文本塊的能力似乎有些低效。
此外，interop的Font.Color屬性也不Font.Color直接轉換為System.Drawing.Color 。 我發現.doc表現符合預期。 但是，對於.docx ，在某些情況下ColorTranslator.FromOle(font.Color)不能返回正確的顏色。
經過一番挖掘，我發現了RgbColorConverter ，它是從該線程中的鏈接復制的： Office 2007 [及更高版本] interop：檢索RGB-color
我認為在此處復制將很有用。
public static class WordColorTest {
public static void GetColors() {
Microsoft.Office.Interop.Word.Application app = new Microsoft.Office.Interop.Word.Application();
Documents docs = app.Documents;
Document doc = docs.Open("C:\\temp\\ColorTest3.docx", ReadOnly:true);
StringBuilder sb = new StringBuilder();
sb.AppendLine("<html><body>");
sb.AppendLine("<table border=1 style='font-family:Arial;'>");
sb.AppendLine("<tr><th>Text</th><th>RGB</th><th>Color</th></tr>");
Dictionary<Color,int> counts = new Dictionary<Color,int>();
foreach (Range rng in doc.StoryRanges) {
foreach (Range rngChar in rng.Characters) { // by each character
_Font f = rngChar.Font;
int rgb = (int) f.Color;
//System.Drawing.Color col = System.Drawing.ColorTranslator.FromOle(rgb); // do not use - not 1-to-1
var col = RgbColorRetriever.GetRGBColor(f.Color, doc);
//ColorFormat cf = f.TextColor; // error - exception on ".doc" files
sb.AppendLine(String.Format("<tr><td>{0}</td><td>{1},{2},{3}</td><td bgcolor='{4}'></td></tr>", rngChar.Text, col.R, col.G, col.B, ToHex(col)));
//sb.AppendLine(rngChar.Text + " " + col.R + "/" + col.G + "/" + col.B);
if (f.Color != WdColor.wdColorAutomatic) {
if (counts.ContainsKey(col))
counts[col]++;
else
counts[col] = 1;
}
Marshal.ReleaseComObject(f);
Marshal.ReleaseComObject(rngChar);
}
Marshal.ReleaseComObject(rng);
}
sb.AppendLine(String.Format("<tr><td colspan=3> </td></tr>"));
foreach (Range rng in doc.StoryRanges) {
foreach (Range rngWord in rng.Words) { // by each word
_Font f = rngWord.Font;
int rgb = (int) f.Color;
//System.Drawing.Color col = System.Drawing.ColorTranslator.FromOle(rgb); // do not use - not 1-to-1
var col = RgbColorRetriever.GetRGBColor(f.Color, doc);
sb.AppendLine(String.Format("<tr><td>{0}</td><td>{1},{2},{3}</td><td bgcolor='{4}'></td></tr>", rngWord.Text, col.R, col.G, col.B, ToHex(col)));
//sb.AppendLine(rngWord.Text + " " + col.R + "/" + col.G + "/" + col.B);
Marshal.ReleaseComObject(f);
Marshal.ReleaseComObject(rngWord);
}
Marshal.ReleaseComObject(rng);
}
sb.AppendLine("</table>");
sb.AppendLine("</body></html>");
doc.Close(false);
app.Quit(false);
Marshal.ReleaseComObject(doc);
Marshal.ReleaseComObject(docs);
Marshal.ReleaseComObject(app);
// if there is a tie, then there is the risk that the color will flip back and forth depending on how the dictionary is ordered
Color max = counts.Count == 0 ? Color.Black : counts.Aggregate((i1,i2) => i1.Value > i2.Value ? i1 : i2).Key;
String html = sb.ToString(); // testing only
}
private static String ToHex(System.Drawing.Color c) {
return "#" + c.R.ToString("X2") + c.G.ToString("X2") + c.B.ToString("X2");
}
}
/// <summary>
/// static class with rgb color retrieving logic: Microsoft.Office.Interop.Word.WdColor -> System.Drawing.Color
/// </summary>
public static class RgbColorRetriever {
#region Constants
// first byte of WdColor determines its format type
private static readonly int
RGB = 0x00,
Automatic = 0xFF,
System = 0x80,
ThemeLow = 0xD0,
ThemeHigh = 0xDF;
//structure to store HSL (hue, saturation, lightness) color
private struct HSL {
public double H, S, L;
}
#endregion
/// <summary>
/// Get RGB-color from WdColor
/// </summary>
/// <param name="wdColor">source color</param>
/// <param name="doc">document, where this color from (for appropriate color theme)</param>
public static Color GetRGBColor(WdColor wdColor, Document doc) {
// separate 1st byte (the most significant) and 3 others to different vars
int color = ((int) wdColor) & ((int) 0xFFFFFF);
int colorType = (int) (((uint) wdColor) >> 24);
if (colorType == RGB) {
// simple color in OLE format (it's just a BGR - blue, green, red)
// let's use standard color translator from system.drawing
return ColorTranslator.FromOle(color);
}
else if (colorType == Automatic) {
// standard contrast color. In my case I was needed color. But I don't know the proper way to understand which one (black or white) I need to choose.
return Color.White;
}
else if (colorType == System) {
// In ActiveX controls in documents, and in VBA (for UserForm controls, for example) special values for system colours
// (for some reason lost in the mists of time these are also called OLE Colors) ranging from 0x80000000 to 0x80000018.
// I used system dll function to retrieve system color and then used standard color translator
int sysColor = GetSysColor(color);
return ColorTranslator.FromOle(sysColor);
}
else if (colorType >= ThemeLow && colorType <= ThemeHigh) {
// color based on doc's color theme
return GetThemedColor(colorType, color, doc);
}
throw new Exception("Unknown color type");
}
private static Color GetThemedColor(int colorType, int color, Document doc) {
// color based on theme is base color + tint or shade
double tintAndShade = 0;
// base color index is least siginficant 4 bits from colorType
int colorThemeIndex = colorType & 0xF;
// 2nd most significant byte is always 0
// 3rd byte - shade, 4th - tint. One of them must be 0xFF and shouldn't be used
// it means that always is used one of them and other is 0xFF
int darkness = (color & 0x00FF00) >> 8;
int lightness = color & 0x0000FF;
if (darkness != 0xFF)
tintAndShade = -1 + darkness / 255.0;
else
tintAndShade = 1.0 - lightness / 255.0;
// so:
// tintAndShade < 0 => shade base color by |tintAndShade| * 100%
// tintAndShade > 0 => tint base color |tintAndShade| * 100%
return GetThemedColor(colorThemeIndex, tintAndShade, doc);
}
private static Color GetThemedColor(int colorThemeIndex, double tintAndShade, Document doc) {
// translate from wdThemeColorIndex to MsoThemeColorSchemeIndex
MsoThemeColorSchemeIndex colorSchemeIndex = ThemeIndexToSchemeIndex(colorThemeIndex);
// get color scheme by this index and take its RGB property, but this RGB still OLE RGB - i.e. BGR -> need to convert it to real RGB, i.e. use ColorTranslator.FromOle() and ToArgb after
OfficeTheme theme = doc.DocumentTheme;
ThemeColorScheme scheme = theme.ThemeColorScheme;
ThemeColor color = scheme.Colors(colorSchemeIndex);
int colorSchemeRGB = ColorTranslator.FromOle(color.RGB).ToArgb();
Marshal.ReleaseComObject(color);
Marshal.ReleaseComObject(scheme);
Marshal.ReleaseComObject(theme);
// do RGB -> HSL translation to apply tint/shade
HSL colorSchemeHSL = RGBtoHSL(colorSchemeRGB);
// apply it
if (tintAndShade > 0)
colorSchemeHSL.L += (1 - colorSchemeHSL.L) * tintAndShade;
else
colorSchemeHSL.L *= 1 - Math.Abs(tintAndShade);
// do backward HSL -> RGB translation
int tintedAndShadedRGB = HSLtoRGB(colorSchemeHSL);
return Color.FromArgb(tintedAndShadedRGB);
}
private static int HSLtoRGB(HSL HSL) {
// took from https://stackoverflow.com/questions/2353211/hsl-to-rgb-color-conversion
double red, green, blue;
if (HSL.S == 0)
red = green = blue = HSL.L;
else {
double q = HSL.L < 0.5 ? HSL.L * (1 + HSL.S) : HSL.L + HSL.S - HSL.L * HSL.S;
double p = 2 * HSL.L - q;
red = Hue2RGB(p, q, HSL.H + 1.0 / 3);
green = Hue2RGB(p, q, HSL.H);
blue = Hue2RGB(p, q, HSL.H - 1.0 / 3);
}
int r = (int) (red * 255), g = (int) (green * 255), b = (int) (blue * 255);
return (r << 16) + (g << 8) + b;
}
private static double Hue2RGB(double p, double q, double t) {
// took from https://stackoverflow.com/questions/2353211/hsl-to-rgb-color-conversion
if (t < 0) t += 1;
if (t > 1) t -= 1;
if (t < 1.0 / 6) return p + (q - p) * 6 * t;
if (t < 1.0 / 2) return q;
if (t < 2.0 / 3) return p + (q - p) * (2.0 / 3 - t) * 6;
return p;
}
private static HSL RGBtoHSL(int RGB) {
// took from https://stackoverflow.com/questions/2353211/hsl-to-rgb-color-conversion
double red, green, blue;
double max, min, diff;
red = ((RGB & 0xFF0000) >> 16) / 255.0;
green = ((RGB & 0x00FF00) >> 8) / 255.0;
blue = (RGB & 0x0000FF) / 255.0;
max = Math.Max(red, Math.Max(green, blue));
min = Math.Min(red, Math.Min(green, blue));
diff = max - min;
HSL res;
res.L = res.H = res.S = (max + min) / 2;
if (max == min)
res.S = res.H = 0;
else {
res.S = res.L < 0.5 ? diff / (max + min) : diff / (2 - max - min);
if (red == max)
res.H = (green - blue) / diff - (blue > green ? 6 : 0);
else if (green == max)
res.H = (blue - red) / diff + 2;
else if (blue == max)
res.H = (red - green) / diff + 4;
res.H /= 6;
}
return res;
}
private static MsoThemeColorSchemeIndex ThemeIndexToSchemeIndex(int colorThemeIndex) {
// translation sheet from http://www.wordarticles.com/Articles/Colours/2007.php#UIConsiderations
switch ((WdThemeColorIndex) colorThemeIndex) {
case WdThemeColorIndex.wdThemeColorMainDark1:
return MsoThemeColorSchemeIndex.msoThemeDark1;
case WdThemeColorIndex.wdThemeColorMainLight1:
return MsoThemeColorSchemeIndex.msoThemeLight1;
case WdThemeColorIndex.wdThemeColorMainDark2:
return MsoThemeColorSchemeIndex.msoThemeDark2;
case WdThemeColorIndex.wdThemeColorMainLight2:
return MsoThemeColorSchemeIndex.msoThemeLight2;
case WdThemeColorIndex.wdThemeColorAccent1:
return MsoThemeColorSchemeIndex.msoThemeAccent1;
case WdThemeColorIndex.wdThemeColorAccent2:
return MsoThemeColorSchemeIndex.msoThemeAccent2;
case WdThemeColorIndex.wdThemeColorAccent3:
return MsoThemeColorSchemeIndex.msoThemeAccent3;
case WdThemeColorIndex.wdThemeColorAccent4:
return MsoThemeColorSchemeIndex.msoThemeAccent4;
case WdThemeColorIndex.wdThemeColorAccent5:
return MsoThemeColorSchemeIndex.msoThemeAccent5;
case WdThemeColorIndex.wdThemeColorAccent6:
return MsoThemeColorSchemeIndex.msoThemeAccent6;
case WdThemeColorIndex.wdThemeColorHyperlink:
return MsoThemeColorSchemeIndex.msoThemeHyperlink;
case WdThemeColorIndex.wdThemeColorHyperlinkFollowed:
return MsoThemeColorSchemeIndex.msoThemeFollowedHyperlink;
case WdThemeColorIndex.wdThemeColorBackground1:
return MsoThemeColorSchemeIndex.msoThemeLight1;
case WdThemeColorIndex.wdThemeColorText1:
return MsoThemeColorSchemeIndex.msoThemeDark1;
case WdThemeColorIndex.wdThemeColorBackground2:
return MsoThemeColorSchemeIndex.msoThemeLight2;
case WdThemeColorIndex.wdThemeColorText2:
return MsoThemeColorSchemeIndex.msoThemeDark2;
default:
throw new Exception("Unknown WdThemeColorIndex: " + colorThemeIndex);
}
}
[DllImport("user32.dll", CharSet = CharSet.Auto)]
public static extern int GetSysColor(int nIndex);
}
下圖說明了將interop Font.Color的值直接傳遞給ColorTranslator.FromOle 。 同樣，它表明當按每個單詞Range請求顏色信息時，會發生某種顏色混合。
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