c# - 使用 PrintDocument 打印表单

Question

我正在尝试使用 PrintDocument 进行打印的 MSDN 示例，但效果并不理想。我已经完成了所有编译工作，但是当我点击打印时，会弹出一个“传真发送设置”窗口。这应该发生吗？我正在尝试打印，而不是发送传真!

我需要更改什么才能直接将其打印到默认打印机？

谢谢!

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.IO;
using System.Drawing.Printing;

namespace WindowsFormsApplication1
{
public partial class Form4 : System.Windows.Forms.Form
{
    private System.ComponentModel.Container components;
    private System.Windows.Forms.Button printButton;
    private Font printFont;
    private StreamReader streamToPrint;

    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);
         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", 10.0f))
        {
            e.Graphics.DrawImage(img, logo);
            e.Graphics.DrawString("Testing!", printFont, Brushes.Black, leftMargin, yPos, new StringFormat());
        }
    }


    // 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);
    }

}
}

Answer 1

似乎传真机是您的默认打印机，最简单的补救方法是在打印页面之前添加打印对话框

PrintDialog printDialog = new PrintDialog();
printDialog.Document = printDocument;
//Show Print Dialog
if (printDialog.ShowDialog() == DialogResult.OK)
{
//Print the page
printDocument.Print();
}

这将让用户在打印前选择他们想要的打印机