C#使用PrintDocument实现打印预览


  1. 添加PrintPreviewControl控件,并做如下设置,绑定printDocument控件:

在这里插入图片描述

  1. 初始化printdocument并绑定打印触发事件
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this.printDocument1.PrintController = null;
//设置打印用的纸张,当设置为Custom的时候,可以自定义纸张的大小
printDocument1.DefaultPageSettings.PaperSize = new PaperSize("Custom", 800, 1150);
//注册PrintPage事件,打印每一页时会触发该事件
printDocument1.PrintPage += new PrintPageEventHandler(this.PrintDocument_PrintPage);
  1. 在画布上写内容:
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private void PrintDocument_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs e)
{
    //添加字符串
    e.Graphics.DrawString("Hello World!", new Font(new FontFamily("宋体"), 10.5f), System.Drawing.Brushes.Black, x, y);
    //添加图片
    e.Graphics.DrawImage(Image.FromFile(imgPath), x, y, imgwid,imgheg);
    //画线
    Pen pen = new Pen(Color.Red, 2);
    e.Graphics.DrawLine(pen, x1, y1, x2, y2);
    //画矩形
    e.Graphics.DrawRectangle(pen, x, y, wid, heg);
}
  1. 放大倍数设置,调整Zoom属性,值为1时放大倍数为100%,可设置成带小数的参数(0.75、1.2等)
    在这里插入图片描述
  2. 分页:
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e.HasMorePages = true;
printControl.Rows += 1;

分页具体实现,如下:

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int page=0;
private void PrintDocument_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs e)
{
    if(page=0)
    {
     page++;
     //添加字符串
     e.Graphics.DrawString("第一页", new Font(new FontFamily("宋体"), 10.5f), System.Drawing.Brushes.Black, x, y);
     e.HasMorePages = true;
     printControl.Rows += 1;
    }
    else
    {
     e.Graphics.DrawString("第二页", new Font(new FontFamily("宋体"), 10.5f), System.Drawing.Brushes.Black, x, y);
    }
}