在 C# 中显示打印预览

Showing Print Preview in C#

提问by Nathan

Right now, I'm trying to build my form on a PrintDocument, but the only way for me to see where stuff is actually appearing on the page is to print a paper. It works, but I have a lot of stuff I need to add, and I'd rather not waste tons of paper. Right now I have a print dialogue come up, but theres no print preview button. Is there a way I can make one appear? Thanks!

现在，我正在尝试在 PrintDocument 上构建我的表单，但是让我查看内容实际出现在页面上的位置的唯一方法是打印一张纸。它有效，但我有很多东西需要添加，我宁愿不浪费大量的纸张。现在我有一个打印对话框出现，但没有打印预览按钮。有没有办法让一个人出现？谢谢！

public partial class Form4 : System.Windows.Forms.Form
    {
        private System.ComponentModel.Container components;
        private System.Windows.Forms.Button printButton;

        public Form4()
        {
            // The Windows Forms Designer requires the following call.
            InitializeComponent();
        }

        // The Click event is raised when the user clicks the Print button. 
        private void printButton_Click(object sender, EventArgs e)
        {
            PrintDocument pd = new PrintDocument();
            pd.PrintPage += new PrintPageEventHandler(this.pd_PrintPage);
            PrintDialog pdi = new PrintDialog();
            pdi.Document = pd;
            if (pdi.ShowDialog() == DialogResult.OK)
            {
                pd.Print();
            }

        }

        // The PrintPage event is raised for each page to be printed. 
        private void pd_PrintPage(object sender, PrintPageEventArgs e)
        {
            Single yPos = 0;
            Single leftMargin = e.MarginBounds.Left;
            Single topMargin = e.MarginBounds.Top;
            Image img = Image.FromFile("logo.bmp");
            Rectangle logo = new Rectangle(40, 40, 50, 50);
            using (Font printFont = new Font("Arial", 20.0f))
            {
                e.Graphics.DrawImage(img, logo);
                e.Graphics.DrawString("Header", printFont, Brushes.Black, leftMargin, yPos, new StringFormat());
            }
            using (SolidBrush blueBrush = new SolidBrush(Color.Black))
            {
                Rectangle rect = new Rectangle(100, 100, 500, 120);
                e.Graphics.FillRectangle(blueBrush, rect);
            }
        }


        // The Windows Forms Designer requires the following procedure. 
        private void InitializeComponent()
        {
            this.components = new System.ComponentModel.Container();
            this.printButton = new System.Windows.Forms.Button();

            this.ClientSize = new System.Drawing.Size(504, 381);
            this.Text = "Print Example";

            printButton.ImageAlign =
               System.Drawing.ContentAlignment.MiddleLeft;
            printButton.Location = new System.Drawing.Point(32, 110);
            printButton.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
            printButton.TabIndex = 0;
            printButton.Text = "Print the file.";
            printButton.Size = new System.Drawing.Size(136, 40);
            printButton.Click += new System.EventHandler(printButton_Click);

            this.Controls.Add(printButton);
        }

    }

采纳答案by LarsTech

You can use a PrintPreviewDialogfor this:

您可以PrintPreviewDialog为此使用 a ：

private void printButton_Click(object sender, EventArgs e)
{
    PrintDocument pd = new PrintDocument();
    pd.PrintPage += new PrintPageEventHandler(this.pd_PrintPage);

    PrintDialog printdlg = new PrintDialog();
    PrintPreviewDialog printPrvDlg = new PrintPreviewDialog();

    // preview the assigned document or you can create a different previewButton for it
    printPrvDlg.Document = pd;
    printPrvDlg.ShowDialog(); // this shows the preview and then show the Printer Dlg below

    printdlg.Document = pd;

    if (printdlg.ShowDialog() == DialogResult.OK)
    {
        pd.Print();
    }
}