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我正在尝试计算要打印的字符串的最大长度。我已经通过使用等距字体来做到这一点，但是这些在页面上占据了太多的水平空间。我真的需要每行打印更多字符而不将字体大小减小到几乎不可见的水平，所以我想改用无衬线字体。这是我当前的打印功能：

    public static void printPage(ref PrintPageEventArgs e, List<ReportLine> CompanyLetterhead, Queue<ReportLine> reportData)
    {
        int xPosition = e.MarginBounds.X;
        int yPosition = e.MarginBounds.Y;

        int maxCharacters = 0;

        foreach (ReportLine line in CompanyLetterhead)
        {
            maxCharacters = e.MarginBounds.Width / (int)line.selectedFont.Size;

            int position = 0;

            while (line.text.Length - position > maxCharacters)
            {
                e.Graphics.DrawString(line.text.Substring(position, position + maxCharacters), line.selectedFont, Brushes.Black, xPosition, yPosition);
                yPosition += line.selectedFont.Height;
                position += maxCharacters;
            }
            if (line.text.Length - position > 0)
            {
                e.Graphics.DrawString(line.text.Substring(position), line.selectedFont, Brushes.Black, xPosition, yPosition);
                yPosition += line.selectedFont.Height;
            }
        }

        while (reportData.Count > 0 && checkLine(yPosition, e.MarginBounds.Bottom, reportData.Peek().selectedFont.Height))
        {
            ReportLine currentLine = reportData.Peek();

            maxCharacters = e.MarginBounds.Width / (int)currentLine.selectedFont.Size;

            if (currentLine.text.Length > maxCharacters)
            {
                string[] words = currentLine.text.Split(new char[] { ' ' , '\t' });
                string printString = "";

                bool endsInSpace = true;

                foreach (string word in words)
                {
                    if (word.Length + printString.Length < maxCharacters)
                    {
                        if (printString.Length > 0)
                        {
                            printString += " ";
                        }
                        printString += word;
                    }
                    else if (printString.Length == 0)
                    {
                        printString += word.Substring(0, maxCharacters);
                        endsInSpace = false;
                    }
                    else
                    {
                        break;
                    }
                }

                e.Graphics.DrawString(printString, currentLine.selectedFont, Brushes.Black, xPosition, yPosition);
                yPosition += currentLine.selectedFont.Height;
                if (endsInSpace)
                {
                    currentLine.text = currentLine.text.Remove(0, printString.Length + 1);
                }
                else
                {
                    currentLine.text = currentLine.text.Remove(0, printString.Length);
                }
            }
            else
            {
                e.Graphics.DrawString(currentLine.text, currentLine.selectedFont, Brushes.Black, xPosition, yPosition);
                yPosition += currentLine.selectedFont.Height;
                reportData.Dequeue();
            }
        }

        e.HasMorePages = reportData.Count > 0;
    }

该函数使用 ReportLine 类对象，定义如下：

public class ReportLine
{
    public string text;
    public Font selectedFont;

    public ReportLine()
    {
        text = "";
        selectedFont = null;
    }

    public ReportLine(string txt, Font font)
    {
        text = txt;
        selectedFont = font;
    }
}

现在，我如何才能使用针对不同字符具有不同宽度的字体进行这项工作？我知道有一个名为 Graphics.MeasureString 的函数，但这只会告诉我所选字体的字符串的总宽度，所以这意味着如果它确实超出了页面的边缘，它只会告诉我如何它会跑多远，而不是跑过多少个字符。

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1 回答 1

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也许您正在寻找Graphics.MeasureCharacterRanges。您可以通过将字符串拆分为单词来确定要传递给该方法的范围。这样你就可以知道每个单词有多宽，可以随意包装。

于 2012-05-24T20:25:54.860 回答