CODEWITHSUNDEEP
c#windowswinformsprinting
Anyname Donotcare
Anyname Donotcare

Reputation: 11393

How to print WebBrowser control content without showing print dialog?

I want to Print my HTML document directly to a specific network printer without printer dialog window when the end user click on PRINT button. I do search and follow this but this opens a dialog window to save the document as pdf.

Based On The Comments:

 public static class PrinterClass
    {
        [DllImport("winspool.drv", CharSet = CharSet.Auto, SetLastError = true)]
        public static extern bool SetDefaultPrinter(string Printer);
    }


    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            //List<string> st = new List<string>();

            //foreach (string strPrinter in PrinterSettings.InstalledPrinters)
            //{
            //    if (strPrinter.Contains("My Printer"))
            //    {
            //        PrinterClass.SetDefaultPrinter(strPrinter);
            //    }
            //    st.Add(strPrinter);
            //}

            SetDefaultPrinter("Send To OneNote 2016");
        }

        WebBrowser webBrowser = new WebBrowser();
        void Print(string str)
        {
            webBrowser.DocumentText = str;

            webBrowser.DocumentCompleted += webBrowser_DocumentCompleted;
        }
        void webBrowser_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
        {
            IHTMLDocument2 d2;
            d2 = (IHTMLDocument2)((WebBrowser)sender).Document.DomDocument;

            d2.execCommand("Print", false, null);
        }

        private void btn_print_Click(object sender, EventArgs e)
        {
            Print("<html><body>..some html code..</body></html>");
        }

        public static bool SetDefaultPrinter(string defaultPrinter)
        {
            using (ManagementObjectSearcher objectSearcher = new ManagementObjectSearcher("SELECT * FROM Win32_Printer"))
            {
                using (ManagementObjectCollection objectCollection = objectSearcher.Get())
                {
                    foreach (ManagementObject mo in objectCollection)
                    {
                        if (string.Compare(mo["Name"].ToString(), defaultPrinter, true) == 0)
                        {
                             mo.InvokeMethod("SetDefaultPrinter", null, null);
                            return true;
                        }
                    }
                }
            }
            return false;
        }
    }

Upvotes: 1

Views: 5547

Answers (1)

Reza Aghaei
Reza Aghaei

Reputation: 125197

In the recent versions of the WebBroswer control, Print() prints to the default printer without showing any dialog:

webBrowser1.Print();

It's equivalent to getting an instance of IWebBrowser2 from the WebBrowser.ActiveXInstance property and then call its ExecWB method by passing OLECMDID_PRINT as command and OLECMDEXECOPT_DONTPROMPTUSER to specify not showing the prompt:

int OLECMDID_PRINT = 6;
int OLECMDEXECOPT_DONTPROMPTUSER = 2;
dynamic iwb2 = webBrowser1.ActiveXInstance;
iwb2.ExecWB(OLECMDID_PRINT, OLECMDEXECOPT_DONTPROMPTUSER, null, null);

Or in a single line of code:

((dynamic)webBrowser1.ActiveXInstance).ExecWB(6, 2, null, null);

Upvotes: 2

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