Question

我是C＃的新手，但我终于启动并运行了我的第一个程序，我需要打印它。它是一个窗口形式，在不同的选项卡控件上有信息和计算，有点像Excel。当前正在查看的页面使用copyfromscreen方法打印正常，但我无法正确打印其他页面。我有大约20个标签，我希望能够一次打印。我找到了一种方法将控件的内容打印到文本文件中，但我更希望能够打印表单的样子。谢谢。

    Bitmap memoryImage;
    Bitmap memoryImage2;
    private void CaptureScreen()
    {

        Graphics myGraphics = this.CreateGraphics();
        Size s = tabControlMain.Size;
        s.Width = s.Width + 20;
        memoryImage = new Bitmap(s.Width, s.Height, myGraphics);
        Graphics memoryGraphics = Graphics.FromImage(memoryImage);
        memoryGraphics.CopyFromScreen(this.Location.X+15, this.Location.Y+80, 0, 0, s);

        tabControlMain.SelectedIndex = 1;
        memoryImage2 = new Bitmap(s.Width, s.Height, myGraphics);
        Graphics memoryGraphics2 = Graphics.FromImage(memoryImage2);
        memoryGraphics2.CopyFromScreen(this.Location.X + 15, this.Location.Y + 80, 0, 0, s);


    }
    private void printDocumentReal_PrintPage(System.Object sender, System.Drawing.Printing.PrintPageEventArgs e)
    {
        e.Graphics.DrawImage(memoryImage, 0, 0);
        e.Graphics.DrawImage(memoryImage2, 0, 550);

    }
    private void printToolStripButton_Click(object sender, EventArgs e)
    {
        CaptureScreen();
        printDocumentReal.Print();
    }

Answer 1

首先，您应该使用PrintDocument和PrintPreviewDialog对象进行打印相关任务，并使用事件处理程序进行打印。第二，您需要为代码执行一些优化，这是解决方案：

private void printToolStripButton_Click(object sender, EventArgs e)
    {
        PrintDocument document = new PrintDocument();
        document.PrintPage += new PrintPageEventHandler(document_PrintPage);
        PrintPreviewDialog preview = new PrintPreviewDialog() { Document = document };
        // you will be able to preview all pages before print it ;)
        try
        {
            preview.ShowDialog();
        }
        catch (Exception ex)
        {
            MessageBox.Show(ex.Message + "\nYou need to install a printer to preform print-related tasks!", "Print Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
        }
    }

    Boolean firstPage = true;
    private void document_PrintPage(object sender, PrintPageEventArgs e)
    {
        if (firstPage)
        {
            tabControlMain.SelectTab(0);
            firstPage = false;
        }
        Graphics g = e.Graphics;
        TabPage tab = tabControlMain.SelectedTab;
        using (Bitmap img = new Bitmap(tab.Width, tab.Height))
        {
            tab.DrawToBitmap(img, tab.ClientRectangle);
            g.DrawImage(img, new Point(e.MarginBounds.X, e.MarginBounds.Y)); // MarginBounds means the margins of the page 
        }
        if (tabControlMain.SelectedIndex + 1 < tabControlMain.TabCount)
        {
            tabControlMain.SelectedIndex++;
            e.HasMorePages = true;//If you set e.HasMorePages to true, the Document object will call this event handler again to print the next page.
        }
        else
        { 
            e.HasMorePages = false;
            firstPage = true;
        } 
    }

我希望它能和你一起工作如果你需要将所有标签保存为硬盘上的图像集，那么这里还有一个：

    public void RenderAllTabs()
    {
        foreach (TabPage tab in tabControlMain.TabPages)
        {
            tabControlMain.SelectTab(tab);
            using (Bitmap img = new Bitmap(tab.Width, tab.Height))
            {
                tab.DrawToBitmap(img, tab.ClientRectangle);
                img.Save(string.Format(@"C:\Tabs\{0}.png", tab.Text));
            }
        }
    }

Answer 2

尝试使用DrawToBitmap的{{1}}方法代替：

TabPage

要获取private void CaptureScreen() { memoryImage = new Bitmap(tabControlMain.SelectedTab.Width, tabControlMain.SelectedTab.Height); tabControlMain.SelectedTab.DrawToBitmap(memoryImage, tabControlMain.SelectedTab.ClientRectangle); tabControlMain.SelectedIndex = 1; memoryImage2 = new Bitmap(tabControlMain.SelectedTab.Width, tabControlMain.SelectedTab.Height); tabControlMain.SelectedTab.DrawToBitmap(memoryImage2, tabControlMain.SelectedTab.ClientRectangle); }的所有图片，您可以制作如下循环：

TabPages

如何使用copyfromscreen捕获的多个屏幕截图进行打印

2 个答案: