调整面板大小以打印整页

Question

我在 tabcontrolpanel 上有一个面板，它大约占据了屏幕的 35%。我正在打印面板，它会打印出屏幕上的确切尺寸。是否可以在 C# 和 winforms 中缩放图像以在 8.5x11 的纸上打印（即使我必须横向打印）？

这是我当前的代码 --

private void btnPrint_Click(object sender, EventArgs e)
{
    PrintDocument doc = new PrintDocument();
    doc.PrintPage += new SPrintPageEventHandler(doc_PrintPage);
    doc.Print();
}

private void doc_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs e)
{
    Bitmap image = new Bitmap(panelToPrint.Width, panelToPrint.Height, panelToPrint.CreateGraphics());
    panelToPrint.DrawToBitmap(image, new Rectangle(0, 0, panelToPrint.Width, panelToPrint.Height));
    RectangleF bounds = e.PageSettings.PrintableArea;
    float factor = ((float)image.Height / (float)image.Width);
    e.Graphics.DrawImage(image, bounds.Left, bounds.Top, bounds.Width, factor * bounds.Width);
}

编辑
我尝试将我的语法修改为默认在横向模式下打印，但我仍然得到与以前相同的输出，只是图像大致打印在页面的前 15%

private void btnPrint_Click(object sender, EventArgs e)
    {
        System.Drawing.Printing.PrintDocument doc = new System.Drawing.Printing.PrintDocument();
        doc.DefaultPageSettings.Landscape = true;
        PrintDialog pdi = new PrintDialog();
        pdi.Document = doc;
        if (pdi.ShowDialog() == DialogResult.OK)
        {
            doc.PrintPage += new System.Drawing.Printing.PrintPageEventHandler(doc_PrintPage);
            doc.Print();
        }
        else
        {
            MessageBox.Show("User cancelled the print job");
        }
    }

    private void doc_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs e)
    {
        Bitmap image = new Bitmap(panelToPrint.Width, panelToPrint.Height, panelToPrint.CreateGraphics());
        panelToPrint.DrawToBitmap(image, new Rectangle(0, 0, panelToPrint.Width, panelToPrint.Height));
        RectangleF bounds = e.PageSettings.PrintableArea;
        float factor = ((float)image.Height / (float)image.Width);
        e.Graphics.DrawImage(image, bounds.Left, bounds.Top, bounds.Width, factor * bounds.Width);
    }

Answer 1

control.DrawToBitmap 正是这样做的。它将 control（如您在屏幕上看到的那样）打印到位图中。如果您想以不同的尺寸打印它，您必须在打印前调整面板的大小。

更好的方法是使用 DrawString 等图形方法将包含在面板中的数据直接绘制到页面中

调整面板大小以打印整页

Resize Panel To Print Full Page

c#

printing

panel

winforms