Graphics.DrawString打印页面上的中心文本

Question

我正在使用以下命令从C＃WPF应用程序中打印出一些文本：

    private void Button_Click(object sender, RoutedEventArgs e)
    {
        PrintDocument printDocument = new PrintDocument();
        printDocument.PrinterSettings.PrinterName = "\\\\servername\\printername";

        printDocument.PrintPage += new PrintPageEventHandler(this.pd_PrintPage);
        if (printDocument.PrinterSettings.IsValid)
        {
            printDocument.Print();
        }
    }

    // The PrintPage event is raised for each page to be printed. 
    private void pd_PrintPage(object sender, PrintPageEventArgs ev)
    {
        string stringToPrint = "SOME TEXT TO PRINT";

        // Create font and brush.
        Font drawFont = new Font("Arial", 16);
        SolidBrush drawBrush = new SolidBrush(System.Drawing.Color.Black);

        System.Drawing.Point pos = new System.Drawing.Point(100, 100);

        ev.Graphics.DrawString(stringToPrint, drawFont, drawBrush, pos);

        ev.HasMorePages = false;
    }

上面的示例使用固定位置，但是我需要打印出所有不同长度的几行文本，并且希望将它们全部居中在页面上（x位置）。

我怎样才能做到这一点？

Answer 1

Graphics.DrawString的重载使用StringFormat参数，可用于设置矩形中文本的水平和垂直对齐方式。 我过去曾使用过类似的方法。

string stringToPrint = "SOME TEXT TO PRINT";
StringFormat sf = new StringFormat();
sf.Alignment = StringAlignment.Center;

// Create font and brush.
Font drawFont = new Font("Arial", 16);
SolidBrush drawBrush = new SolidBrush(System.Drawing.Color.Black);

//Starting point of left margin,Width of page, Height of Text
System.Drawing.RectangleF rect = new System.Drawing.RectangleF(0, 100, 100, 50); 

ev.Graphics.DrawString(stringToPrint, drawFont, drawBrush, rect, sf);

ev.HasMorePages = false;