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27 Oct 2017 ... NET PDF Viewer for WebForms is a FREE ASP .N. ... User Rating: Unrated. Compatibility: C# , VB.NET, ASP . NET . Views: 16061 ... Figure 20-4. SQL injection caused by not using placeholders in db_query() Whoops! We were able to enter SQL into the URL and have it executed! How did this happen Recall that earlier I mentioned that %20 was the encoded version of a space We simply entered the encoded version of the following text: page' OR type = 'story Remember our insecure assignment of SQL to the $sql variable Look what happens when the encoded text we entered gets unencoded and becomes part of the statement. Here s the code before: SELECT title FROM {node} WHERE type = '$type' Substituting in $type, which is now set to page' OR type = 'story, we now have SELECT title from {node} WHERE type = 'page' OR type = 'story' Once a user is able to change the SQL you re sending to your database, your site is easy to compromise (see http://xkcd.com/327/). Here s an improvement: function insecure_code($type = 'story') { // SQL now protected by using a quoted placeholder. $sql = "SELECT title FROM {node} WHERE type = '%s'"; $result = db_query($sql, $type); $titles = array(); while ($data = db_fetch_object($result)) { $titles[] = $data->title; } // For debugging, output the SQL statement to the screen. $output = $sql; $output .= theme('item_list', $titles); return $output; } c# pdf viewer open source: C# PDF : PDF Document Viewer & Reader SDK for Windows Forms ... c# .net pdf reader How to Launch PDF Reader using C# - CodeProject
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the PDFs working for my web page which has a GridView in it. what i did is: I stored all the PDF ... I am using VB.NET not C# ... I want to list out and open doc files from my asp.net application on hyperlink click, language is C# . As mentioned, an action is a named piece of functionality on a controller. The MVC Framework s usual convention is that the name of the action is taken from the name of the method that defines and implements that functionality. You can override this convention using ActionNameAttribute for example: [ActionName("products-list")] public ActionResult DisplayProductsList() { // ... } Under the default routing configuration, you would not find this action on the usual URL, /controllername/DisplayProductsList. Instead, its URL would be /controllername/products-list. This is useful for two main reasons: It creates the possibility of using action names that aren t legal as C# method names, such as in the preceding example. You can use any string as long as it s legal as a URL segment. It allows you to have multiple C# methods that correspond to the same action name, and then use a method selector attribute (e.g., [HttpPost], described later in this chapter) to choose which one a given request should map to. This is a workaround for C# s limitation of only allowing multiple methods to have the same name if they take a different set of parameters. You ll see an example of this shortly. c# remove text from pdf: How to replace specific word in pdf using itextsharp C# .net ... asp net pdf viewer user control c# The C# PDF Viewer - .Net Pdf Viewer for WinForms Applications
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20 May 2019 ... Net . If we want to show a PDF file in a . Net form then we can use many approaches such as we can ... It is a free Adobe Acrobat PDF Reader. Now when we try to manipulate the URL by going to http://examplecom/ q=insecure/ page'%20OR%20type%20=%20'story, the db_query() function sanitizes the value by escaping the embedded single quotes The query becomes the following: SELECT title FROM node WHERE type = 'page\' OR type = \'story' This query will clearly fail because we have no node type named "page\' OR type = \'story" The situation can still be improved, however In this case, the URL should contain only members of a finite set; that is, the node types on our site We know what those are, so we should always confirm that the user-supplied value is in our list of known values For example, if we have only the page and story node types enabled, we should only attempt to proceed if we have been given those types in the URL. Note Now you can appreciate why the MVC Futures generic URL-generating helpers (such as Html.ActionLink<T>()), which generate URLs based purely on .NET method names, don t entirely make sense and don t always work. This is why they are not included in the core MVC Framework. how to open pdf file on button click in c# Display PDF file and upload to Database using C# in ASP . Net ...
In ASP . NET , After selecting the PDF file using file upload control i want to see the preview of selected PDF file and i need to upload the selected PDF file to Database using separate upload button. Refer below link to view pdf file after selecting from FileUpload. how to open pdf file in c# Free Spire. PDFViewer - Visual Studio Marketplace
7 May 2019 ... This free PDF Viewer API supports multiple printing orientations ... NET application without Adobe Reader or any other 3rd party software/library installed on system. ... Developed entirely in C# , being 100% managed code. Let s add some code to check for that: function insecure_code($type = 'story') { // Check to make sure $type is in our list of known content types $types = node_get_types(); if (!isset($types[$type])) { watchdog('security', 'Possible SQL injection attempt!', array(), WATCHDOG_ALERT); return t('Unable to process request'); } // SQL now protected by using a placeholder $sql = "SELECT title FROM {node} WHERE type = '%s'"; $result = db_query($sql, $type); $titles = array(); while ($data = db_fetch_object($result)) { $titles[] = $data->title; } // For debugging, output the SQL statement to the screen $output = $sql; $output = theme('item_list', $titles); return $output; } Here we ve added a check to make sure that $type is one of our existing node types, and if the check fails, a handy warning will be recorded for system administrators There are more problems, though. It s entirely possible for there to be multiple C# methods that are candidates to handle a single action name. Perhaps you have multiple methods with the same name (taking different parameters), or perhaps you are using [ActionName] so that multiple methods are mapped to the same action name. In this scenario, the MVC Framework needs a mechanism to choose between them. This mechanism is called action method selection, and is implemented using an attribute class called ActionMethodSelectorAttribute. You ve already used one of the subclasses of that attribute, HttpPostAttribute, which prevents action methods from handling requests other than POST requests for example: [HttpPost] public ActionResult DoSomething() { ... } how to open pdf file using c# asp . net open pdf file in web browser using c# vb.net : Acrobat ...
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For windows applications we have to provide the rdlc path using the ... Render(" PDF ", null, out mimeType, out encoding, out extension, out ... how to add image in pdf using c#: Add Water mark image to PDF using iTextsharp, C# and VB.Net in ASP ...
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