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public partial class Print : Form
    {

       // 定義dgSetPage托付進(jìn)行打印時(shí)的選項(xiàng)設(shè)置
        public delegate void dgSetPage();   

       //定義dgFiledelete 托付進(jìn)行打印完畢后。刪除填充后的模板文件
        public delegate void dgFiledelete();

        [DllImport("User32.dll", EntryPoint = "FindWindow")]
        private static extern IntPtr FindWindow(string lpClassName, string lpWindowName);
        [DllImport("User32.dll", EntryPoint = "FindWindowEx")]
        private static extern IntPtr FindWindowEx(IntPtr hwndParent, IntPtr hwndChildAfter, string lpClassName, string lpWindowName);
 
        [DllImport("User32.dll", EntryPoint = "SendMessage")]
        public static extern int SendMessage(IntPtr hWnd, int msg, int wParam, int lParam);

        //定義SendMessage方法內(nèi)使用的鼠標(biāo)單擊 常量

        const int BM_CLICK = 0xF5;

        private void btnPrint_Click(object sender, EventArgs e)
        {
            btnPrint.Enabled = false;

           //由于是使用WebBrowser對象進(jìn)行打印HTML文件，所以無法控制頁面設(shè)置，須要使用注冊表改動(dòng)一些內(nèi)容

           //方法 ChangePageSettingByRegist 。改動(dòng)注冊表，取消頁眉、頁角項(xiàng)目
            ChangePageSettingByRegist();

           //讀取數(shù)據(jù)填充HTML模板
            string sFillDataResult=FillDataToNewFile();

            if (sFillDataResult.IndexOf("NG") >= 0)
            {
                MessageBox.Show(sFillDataResult);
                return;
            }

            pd_PrintPage(); 
            btnPrint.Enabled = true;
        }

        private void pd_PrintPage()
        {
            //創(chuàng)建一個(gè)WebBrowser對象，然后用它在后臺打開并解釋HTML文件
            WebBrowser webBrowserForPrinting = new WebBrowser();

           //  lblNewFile.Text  保存是填充后的模板文件名稱 
            webBrowserForPrinting.Url = new Uri(Application.StartupPath.ToString() + "\\" +  lblNewFile.Text);

            //當(dāng)載入文件完畢后激發(fā)手動(dòng)追加的事件
            webBrowserForPrinting.DocumentCompleted +=   new WebBrowserDocumentCompletedEventHandler(PrintDocument);
            webBrowserForPrinting.Focus();
        }

        private void PrintDocument(object sender,WebBrowserDocumentCompletedEventArgs e)
        { 
            //創(chuàng)建一個(gè)新的線程，用于當(dāng)彈出頁面設(shè)置對話框時(shí)發(fā)送設(shè)置為橫向的指令
            Thread th = new Thread(new ThreadStart(new dgSetPage(SetPage)));
            th.Start(); 

            //彈出頁面設(shè)置對話框-----即上方定義的新進(jìn)程須要處理的窗體
            ((WebBrowser)sender).ShowPageSetupDialog();

            //打印
            ((WebBrowser)sender).Print();
           
            //釋放資源
            ((WebBrowser)sender).Dispose();

            //刪除填充后的模板文件，防止反復(fù)打印
            System.IO.File.delete(lblNewFile.Text);
            lblNewFile.Text = "";
        }

        //  此處方式被凝視掉了，由于假設(shè)須要改動(dòng)主窗體內(nèi)控件的內(nèi)容或者狀況里須要使用托付調(diào)用改動(dòng)方法

       //  須要時(shí)，把SetPage與SetPage2名稱互換就可以在變更后的名稱為SetPage2內(nèi)加入改動(dòng)主窗體內(nèi)容的代碼
        //private void SetPage2()
        //{
        //    //新建托付對象
        //    MethodInvoker In = new MethodInvoker(SetPage2);
        //    this.BeginInvoke(In);
        //}

        private void SetPage()
        {
            int i = 0;

          //      此處須要設(shè)置循環(huán)查找時(shí)間。眼下為超過10秒未找到結(jié)束查找
          while (true)
            {
                IntPtr WindownHand = FindWindow("#32770", "頁面設(shè)置");
                if (WindownHand != IntPtr.Zero)
                {

                    //找到窗體內(nèi)子項(xiàng)目的名柄，然后模擬鼠標(biāo)左鍵單擊事件
                    IntPtr Wk = FindWindowEx(WindownHand, IntPtr.Zero, null, "橫向(&A)");
                    SendMessage(Wk, BM_CLICK, 0, 0);

                    IntPtr Wk1 = FindWindowEx(WindownHand, IntPtr.Zero, null, "確定");
                    SendMessage(Wk1, BM_CLICK, 0, 0);

                    break;
                }
                else
                {
                    if (i > 20)
                        break;
                    Thread.Sleep(500);
                    i++;
                }
            }

        }

        //改動(dòng)注冊表，把頁眉頁腳拿掉。然后設(shè)置為縮放至一頁
        private void ChangePageSettingByRegist()
        {
            RegistryKey hklm = Registry.CurrentUser;
            RegistryKey software = hklm.OpenSubKey(@"Software\Microsoft\Internet Explorer\PageSetup".ToUpper(), true);
            object A = (object)"";
            object B = (object)"0.5";
            object C = (object)"0";
            software.SetValue("header", A);
            software.SetValue("footer", A);
            software.SetValue("margin_bottom", B);
            software.SetValue("margin_left", C);
            software.SetValue("margin_right", C);
            software.SetValue("margin_top", C);
            software.SetValue("Shrink_To_Fit","yes");          

        }

HTML模板內(nèi)容片段

     <%A%>  占位符，用于替換

    <table cellpadding="0" cellspacing="0" border="0px">
        <tr><td colspan="8"  class="EachPartSpace"></td></tr>
        <tr><td class="LayOutFieldTitle" colspan="8">Machine Protocol</td></tr>       
        <tr>
            <td class="FieldNameHorizontal Column1With">Purchase Order No:</td>
            <td class="FieldValueHorizontal Column2With"><%OrderNo%></td>
            <td class="FieldNameHorizontal Column1With">Unit No:</td>
            <td class="FieldValueHorizontal Column2With"><%UnitNo%></td>
            <td class="FieldNameHorizontal Column1With">Region:</td>
            <td class="FieldValueHorizontal Column6With"><%Region%></td>
            <td class="FieldNameHorizontal Column2With">Assembly date:</td>
            <td class="FieldValueHorizontal Column2With"><%AssemblyDate%></td>
        </tr>
    </table>