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Printing in ASP.NET

Posted by Rahul Kumar Saxena Articles | ASP.NET Programming August 27, 2009
One of the most common functionality in any ASP.NET application is to print forms and controls. In this article I am going to show how we can achieve this print functionality in our asp.net application.
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One of the most common functionality in any ASP.NET application is to print forms and controls.

In this article, I am going to show how can we achieve this print functionality in our asp.net application. For this, I created a PrintHelper class. In this class, I made a method 'PrintWebControl'. With this method we can print any server control alike GridView, DataGrid, Panel, TextBox etc.

This is my PrintHelper.cs


using
System;

using System.Data;

using System.Configuration;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Web.UI.HtmlControls;

using System.IO;

using System.Text;

using System.Web.SessionState;

 

/// <summary>

/// Summary description for PrintHelper

/// </summary>

public class PrintHelper

{

    public PrintHelper()

    {

        //

        // TODO: Add constructor logic here

        //

    }

    public static void PrintWebControl(Control ctrl)

    {

        PrintWebControl(ctrl, string.Empty);

    }

 

    public static void PrintWebControl(Control ctrl, string Script)

    {

        StringWriter stringWrite = new StringWriter();

        System.Web.UI.HtmlTextWriter htmlWrite = new System.Web.UI.HtmlTextWriter(stringWrite);

        if (ctrl is WebControl)

        {

            Unit w = new Unit(100, UnitType.Percentage); ((WebControl)ctrl).Width = w;

        }

        Page pg = new Page();

        pg.EnableEventValidation = false;

        if (Script != string.Empty)

        {

            pg.ClientScript.RegisterStartupScript(pg.GetType(), "PrintJavaScript", Script);

        }

        HtmlForm frm = new HtmlForm();

        pg.Controls.Add(frm);

        frm.Attributes.Add("runat", "server");

        frm.Controls.Add(ctrl);

        pg.DesignerInitialize();

        pg.RenderControl(htmlWrite);

        string strHTML = stringWrite.ToString();

        HttpContext.Current.Response.Clear();

        HttpContext.Current.Response.Write(strHTML);

        HttpContext.Current.Response.Write("<script>window.print();</script>");

        HttpContext.Current.Response.End();

    }

}

 

Here, in this application, I created 2 pages. First is the default page of the content that I want to print.On the same page, I set a Print button also. When it will be clicked, it will redirect the user to the second page, named as 'Print.aspx'.


Default.aspx


<%
@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>

 

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head runat="server">

    <title>Pring in ASP.NET</title>

</head>

<body>

    <form id="form1" runat="server">

        <div>

            <asp:Button ID="btnPrint" runat="server" Text="Print" OnClick="btnPrint_Click" /><br />

            <asp:Panel ID="pnl1" runat="server">

                <table cellpadding="4" cellspacing="4" width="50%" align="center">

                    <tr>

                        <td align="center">

                            Fill all information

                        </td>

                    </tr>

                    <tr>

                        <td>

                            <asp:Label ID="Label1" runat="server" Text="Email" Width="130px"></asp:Label>

                            <asp:TextBox runat="server"></asp:TextBox>

                        </td>

                    </tr>

                    <tr>

                        <td>

                            <asp:Label ID="Label2" runat="server" Text="Name" Width="130px"></asp:Label>

                            <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>

                        </td>

                    </tr>

                    <tr>

                        <td>

                            <asp:Label ID="Label6" runat="server" Text="Country" Width="130px"></asp:Label>

                            <asp:TextBox ID="TextBox5" runat="server"></asp:TextBox>

                        </td>

                    </tr>

                    <tr>

                        <td>

                            <asp:Label ID="Label3" runat="server" Text="Mobile" Width="130px"></asp:Label>

                            <asp:TextBox ID="TextBox2" runat="server"></asp:TextBox>

                        </td>

                    </tr>

                </table>

            </asp:Panel>

        </div>

    </form>

</body>

</html>

PrintImage1.JPG

Image 1.

Click event of 'print' button is:


protected
void btnPrint_Click(object sender, EventArgs e)

    {

        Session["ctrl"] = pnl1;

        ClientScript.RegisterStartupScript(this.GetType(), "onclick", "<script language=javascript>window.open('Print.aspx','PrintMe','height=300px,width=300px,scrollbars=1');</script>");

    }

When, the 'Print' button is clicked,screen will be looking as under in the Image 2

PrintImage2.JPG 

Image 2.

Following is the load event of this page, 'Print.aspx':



protected
void Page_Load(object sender, EventArgs e)

    {

        Control ctrl = (Control)Session["ctrl"];

        PrintHelper.PrintWebControl(ctrl);

    }

 

 

 

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