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iText 5-legacy : How to remove text from a PDF ?
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12 Jan 2015 ... Is it possible to remove all text occurrences contained in a specified area (red color rectangle area) of a pdf document? 5th November 2015.
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You can associate each button control in a page (Button, HyperLink, ImageButton, LinkButton, and AdRotator) with an extra layer of code that first tracks the click and then proceeds with the expected behavior. Getting this behavior with controls that entail a postback is not difficult. Take the LinkButton class, for example. You can derive a new control and override the OnClick protected member as follows:

protected virtual void OnClick(EventArgs e) { // Track the event ... // Proceed with the default behavior base.OnClick(e); }

What about the HyperLink control, though The click on the hyperlink is handled directly by the browser and doesn t pass through any ASP.NET code of yours.

The idea is that you force the HyperLink control to adopt a navigation URL that is different from the one set by the programmer. In other words, you divert the HyperLink to a custom page on your site where you first accomplish any custom tasks you need (such as tracking) and then redirect to the originally requested page. The code for such a modified version of the HyperLink control doesn t look particularly scary:

itextsharp remove text from pdf c#

Changing existing text in a PDF using iText – Sampath LK – Medium
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14 Oct 2016 ... Last few days I was trying to modify some PDF file using iText library. ... So my first try was to replace the existing text with dynamic data. I…
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using System; using System.Web.UI.WebControls; namespace Samples { public class Hyperlink : System.Web.UI.WebControls.HyperLink { public string RedirectPage { get { var o = ViewState["RedirectPage"]; if (o == null) return "redir.aspx"; else return (String) o; } set { ViewState["RedirectPage"] = value; } } public new String NavigateUrl { get { return base.NavigateUrl; } set

Return Me.m_owner & "-S" End Get End Property // Visual C# override public string ID { get { return this.m_owner + "-S";

{ var url = "{0} page={1}"; url = String.Format(url, RedirectPage, value); base.NavigateUrl = url; } } } }

If he has tried and failed, he will move on about seventy-five to eighty-five percent of the time Level four is usually left to the Tourists, who are notorious for going to extreme efforts to attain their goals While some Tourists give up after failing at levels one, two, and three, others feel that they must get into your system or "lose the game," so they move on to the more advanced techniques of level four They may resort to researching your system users, or to visiting your computer room to look over shoulders or to read scribbled notes left near terminals Or, they may set up a computer to try every possible password - if that is what's required A hacker working at level four succeeds in getting into a system about ninety percent of the time.

As you can see, the new control has a brand new property RedirectPage and overrides an existing property NavigateUrl. RedirectPage indicates the URL of the intermediate page, where the user is temporarily redirected so that any custom tasks such as click-through tracking can be accomplished. Here s an example of the code file of such a page:

public partial class Redir : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { // Capture the originally requested page var url = String.Empty; var o = Request["Page"]; if (o != null) { url = Server.UrlEncode((String) o); if (String.IsNullOrEmpty(url) return; } // Do something here, such as updating a counter ... // Redirect the user to the originally requested page Response.Redirect(url); } }