| Group Function | ||
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Group a range of text fragments into a set of lines.
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Syntax
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[C#]
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Params
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Notes
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Group a range of text fragments into a set of lines. Calling Select will return a list of TextFragments corresponding to the section of text you are interested in. However each TextFragment may only make up a small portion of a word. Calling this function allows you to group connected fragments into continuous sections with a common rectangular area. Strictly speaking this grouping does not always correspond to lines. For example two fragments on the same line, separated by a large distance, will not be considered contiguous. However for most purposes the two broadly correspond.
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Example
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Here we highlight a set of words in a source document by drawing a rectangle around each one.
string src = Server.MapPath("mypics/Acrobat.pdf");
string dst = Server.MapPath("HighlightedText.pdf");
string searchString = "Acrobat";
using var doc = new Doc();
doc.Read(src);
TextOperation op = new TextOperation(doc);
op.PageContents.AddPages();
string text = op.GetText();
int pos = 0;
while (true) {
pos = text.IndexOf(searchString, pos, StringComparison.CurrentCultureIgnoreCase);
if (pos < 0)
break;
var selection = op.Select(pos, searchString.Length);
var groups = op.Group(selection);
foreach (var group in groups) {
doc.Rect.String = group.Rect.String;
doc.FrameRect();
}
pos += searchString.Length;
}
doc.Save(dst);
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