打印机设置(PrintDialog)、页面设置(PageSetupDialog) 及 RDLC报表如何选择指定打印机

时间:2024-02-25 16:37:59

如果一台电脑同时连接多个打印机,而且每个打印机使用的纸张大小各不相同(比如:票据打印钱用的小票专用张,办公打印机用的是A4标准纸),在处理打印类的需求时,如果不用代码干预,用户必须每次打印时,都必须在弹出窗口里,手动选择打印机(还有可能需要设置纸张类型),这样用起来会比较烦。

幸好,.Net提供了“二”个很有用的类:PrintDialog(打印机设置对话框)、PageSetupDialog(页面设置对话框) (注:之所以给“二”加引号,是因为"打印机设置"其实已经完全包含了“页面设置”的所有功能,而且“ PageSetupDialog”类在实际使用中发现还有一个容易误导的地方)

一、打印机设置(PrintDialog)

示例代码:

using System;
using System.Drawing.Printing;
using System.Windows.Forms;

namespace PrintDemo
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();            
        }       

        private void btnPrintSet_Click(object sender, EventArgs e)
        {
            PrintDialog dlg = new PrintDialog();
            if (dlg.ShowDialog() == DialogResult.OK) {               
                ShowInfo(dlg.PrinterSettings);
            }
        }

        private void ShowInfo(PrinterSettings printSettings) { 

            var pageSettings = printSettings.DefaultPageSettings;
            var pageSize = pageSettings.PaperSize;

            label1.Text = string.Format("打印机:{1}{0}纸张类型:{2}{0}纸张大小:{3}cm * {4}cm{0}纸张布局:{5}",
                Environment.NewLine + Environment.NewLine,
                printSettings.PrinterName,
                pageSize.PaperName,
                InchToCm(pageSize.Width / 100.0M).ToString("F2"),
           InchToCm(pageSize.Height / 100.0M).ToString("F2"),
           pageSettings.Landscape ? "横向" : "纵向");
        
        }

        const decimal K = 2.54M;

        private decimal InchToCm(decimal inch)
        {
            return inch * K;
        }

        private decimal CmToInch(decimal cm) 
        {
            return cm / K;
        }
    }
}

 "打印机设置"对话框的截图如下:

"打印机设置"对话框调用完成后,可以取回一些有用的信息,下面是一些关键信息的展示截图:

可以看到,打印机设置界面里,已经包含了关于纸张尺寸、纸张布局(纵向、横向)的设置,所以在我看来,系统没有必要再单独提供"页面设置(PageSetupDialog)"

二、页面设置(PageSetupDialog)
示例代码:(在刚才的代码基础上加点东西)

using System;
using System.Drawing.Printing;
using System.Windows.Forms;

namespace PrintDemo
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();            
        }       

        /// <summary>
        /// 打印机设置
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnPrintSet_Click(object sender, EventArgs e)
        {
            PrintDialog dlg = new PrintDialog();
            if (dlg.ShowDialog() == DialogResult.OK) {               
                ShowInfo(dlg.PrinterSettings);
            }
        }

        /// <summary>
        /// 页面设置
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnPageSet_Click(object sender, EventArgs e)
        {
            PageSetupDialog dlg = new PageSetupDialog();
            dlg.PageSettings = new PageSettings();
            if (dlg.ShowDialog() == DialogResult.OK)
            {
                ShowInfo(dlg.PageSettings);
            }
        }

        private void ShowInfo(PrinterSettings printSettings) { 

            var pageSettings = printSettings.DefaultPageSettings;
            var pageSize = pageSettings.PaperSize;

            label1.Text = string.Format("打印机:{1}{0}纸张类型:{2}{0}纸张大小:{3}cm * {4}cm{0}纸张布局:{5}",
                Environment.NewLine + Environment.NewLine,
                printSettings.PrinterName,
                pageSize.PaperName,
                HundredthsInchToCM(pageSize.Width).ToString("F1"),
           HundredthsInchToCM(pageSize.Height).ToString("F1"),
           pageSettings.Landscape ? "横向" : "纵向");
        
        }

        private void ShowInfo(PageSettings pageSettings)
        {
            var pageSize = pageSettings.PaperSize;
            label1.Text = string.Format("纸张类型:{1}{0}纸张大小:{2}cm * {3}cm{0}纸张布局:{4}{0}页边距:{5}",
                Environment.NewLine + Environment.NewLine,
                pageSize.PaperName,
                HundredthsInchToCM(pageSize.Width).ToString("F1"),
           HundredthsInchToCM(pageSize.Height).ToString("F1"),
           pageSettings.Landscape ? "横向" : "纵向",
           MarginToString(pageSettings.Margins));
        }

        private string MarginToString(Margins margins) {
            return string.Format("左:{0}mm,上:{1}mm,右:{2}mm,下:{3}mm", HundredthsInchToMM(margins.Left), HundredthsInchToMM(margins.Top), HundredthsInchToMM(margins.Right), HundredthsInchToMM(margins.Bottom));                
        }

        const decimal K = 2.54M;       

        /// <summary>
        /// (百分之一)英寸制,转毫米
        /// </summary>
        /// <returns></returns>
        private int HundredthsInchToMM(decimal d) {
            return  (int)Math.Round((d / 100.00M) * K * 10);
        }

        /// <summary>
        /// (百分之一)英寸制,转厘米
        /// </summary>
        private decimal HundredthsInchToCM(decimal d)
        {
            return (d / 100.00M) * K;
        }


    }
}

 

这里有一个坑爹的地方,不管你如何选择Pager Size,最后返回的PageSettings里,PageSize 始终是A4纸的大小(如下图),这也是我强烈推荐大家尽量避免使用PageSettings的理由

 还有一个问题,如何在弹出这二个对话框时,默认就选中一些特定的值呢?这个容易,参见下面的代码:

        /// <summary>
        /// 打印机设置
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnPrintSet_Click(object sender, EventArgs e)
        {
            PrintDialog dlg = new PrintDialog();
            dlg.PrinterSettings = new PrinterSettings()
            {
                PrinterName = "pdfFactory Pro"                
            };
            if (dlg.ShowDialog() == DialogResult.OK) {               
                ShowInfo(dlg.PrinterSettings);
            }
        }

 这样,在弹出打印机设置界面时,就默认选中了"pdfFactory Pro"打印机(当然,这个名字必须确实是你本机安装的打印机之一,如果这个打印机名字不存在,系统仍将选中默认打印机)

        /// <summary>
        /// 页面设置
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnPageSet_Click(object sender, EventArgs e)
        {
            PageSetupDialog dlg = new PageSetupDialog();
            dlg.PageSettings = new PageSettings()
            {
                PaperSize = new PaperSize()
                {
                    PaperName = "A5",//其实这里不管设置什么名称,都没啥用
                    //一旦设置初始尺寸大小后,在页面设置对话框里,不管选什么纸张Size,
                    //对话框关闭时,返回值的PageSize里,始终就是这个大小,不会随用户选择而改变
                    Height = 827,
                    Width = 583
                },
                Landscape = false,
                Margins = new Margins() { Left = 10, Top = 20, Bottom = 30, Right = 40 }
            };
            if (dlg.ShowDialog() == DialogResult.OK)
            {
                ShowInfo(dlg.PageSettings);
            }
        }

 这样,页面设置对话框弹出时,就默认选中了布局方向为“纵向”,同时设置了边距,而且纸张大小为A5的大小(注意:PageSize的设置,在界面上看不出效果,但是关闭对话框后,返回值的PageSize里会起作用)

三、RDLC报表用代码指定打印机、纸张大小、打印份数

rdlc报表的预览控制ReportViewer里,已经对外暴露了PrinterSettings属性

        //
        // Summary:
        //     Gets or sets a System.Drawing.Printing.PrinterSettings object that contains
        //     the settings for the default printer and print options that are used to initialize
        //     the Print dialog and the printer\'s Preferences dialog.
        //
        // Returns:
        //     A System.Drawing.Printing.PrinterSettings object.
        [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
        [Browsable(false)]
        public PrinterSettings PrinterSettings { get; set; }

 以及PageSettings的set/get方法

        //
        // Summary:
        //     Returns the page settings that are used to print the current report in the
        //     ReportViewer control or display it in print layout mode.
        //
        // Returns:
        //     A System.Drawing.Printing.PageSettings object that contains the page settings
        //     that are used to print the current report in the ReportViewer control or
        //     display it in print layout mode, or null if the ReportViewer control has
        //     not yet processed a report.
        public PageSettings GetPageSettings();

 

        //
        // Summary:
        //     Sets the page settings that are used to print the current report in the ReportViewer
        //     control or display it in print layout mode.
        //
        // Parameters:
        //   pageSettings:
        //     A System.Drawing.Printing.PageSettings object that contains the new page
        //     settings.This parameter must not be null.
        public void SetPageSettings(PageSettings pageSettings);

 利用这些信息,就足够控制RDLC的打印机和纸张大小了,比如要指定某台打印机打印,可以这么做:

            this.reportViewer1.PrinterSettings = new PrinterSettings()
            {
                PrinterName = "pdfFactory Pro"
            };

 要指定RDLC打印时,采用特定的纸张大小,可以参考下面的代码:

            var pageSettings = this.reportViewer1.GetPageSettings();
            pageSettings.PaperSize = new PaperSize()
                {
                    Height = 100,
                    Width = 50
                };
            pageSettings.Landscape = true;
            this.reportViewer1.SetPageSettings(pageSettings);

打印份数的控制很简单:PrinterSettings类有一个Copies属性,直接给它赋值一个short型数字就行了

最后再回到本文最开头提出的问题,知道如何用代码影响打印机、纸张大小后,最后可以将PageSettings以及PrinterSettings中的关键信息,持久化存储起来(比如:用xml或DB),下次再进入该业务界面时,根据存储的配置信息还原相关的设置,这样用户只要设置一次,以后就不用每次手动切换打印机或纸张类型了。