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Apr 25, 2013 · How to specify the position of the table in a pdf file using iTextsharp c# - iTextSharp table ...Duration: 14:56 Posted: Apr 25, 2013 The amount of data access code is greatly reduced as compared to standard ADO.NET. When using the ExecuteQuery method, the source of the data is not important. All that is important is that the column names returned by the select statement match the names of the properties in the class. As long as these values match, the pass-through query can return the strongly typed objects that we specify. Since the entire query is weakly typed when working with pass-through queries, special care needs to be taken to validate the user-supplied values. In addition, we also need to check the syntax. In listing 8.9, if the user enters a value for the SearchName that is not a valid field name, the framework will throw an exception. Even worse, a malicious user could easily initiate a SQL injection attack. For example, consider the results that would be returned if the user enters the following string in the textbox: Good' OR ''='. In this case, we would effectively be returning all records where the author last name is Good and any records where an empty string equals an empty string. Since the second clause would always return true, all authors would be returned rather than just the requested author. As an alternative, the pass-through query can be constructed using the same curly notation that is used by the String.Format method. Follow the SQL string with a list of parameters that will be used by the query. In this case, the values are added into the statement as parameters rather than relying on string concatenation. Listing 8.10 extends the previous example with a parameter array replacing the inline concatenation. Rather than performing a direct String.Format how to edit pdf file in asp net c#: How to develop a PDF Editor Windows application in C#/.NET ... itextsharp edit existing pdf c# Create, read, edit, convert PDF files in .NET applications [C#, VB.NET]
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The C# and VB.NET PDF Library. C Sharp ASP .NET PDF Generator / Writer. A DLL in C# asp.net to generate and Edit PDF documents in .Net framework and . method, which would result in a concatenation, the DataContext translates the expression into a parameterized query. In this case, we can thwart users trying to inject commands into the query string. string searchName = "Good' OR ''='"; Ch8DataContext context = new Ch8DataContext(); string sql = @"Select ID, LastName, FirstName, WebSite, TimeStamp " + "From dbo.Author " + "Where LastName = {0}"; ObjectDumper.Write(context.ExecuteQuery<Author>(sql, SearchName)); word to pdf c# itextsharp: C# convert word byte array to pdf byte array - Microsoft Dynamics ... itextsharp edit existing pdf c# Read, Edit and manipulate PDF documents in C# windows application ...
Hello Team,. Am using .Net framework 4.5, VisualStudio 2012,WPF, windows application. I want to open & display PDF and should have the ... itextsharp edit existing pdf c# Create, Read, Fill, Update, Delete Pdf Form Fields in C#.NET - Fill ...
C# demo to guide how to create and insert form fields to pdf, read Pdf form fields data, fill and update form fields data in C# language. To design smart clients to perform efficiently, consider the following: Caching data where appropriate. Data caching can dramatically improve the performance of a smart client application, allowing you to work with data locally rather than having to retrieve it from the network constantly. However, data that is sensitive or changes frequently is not usually appropriate for caching. Optimizing network communications. Communication through chatty interfaces to remote tier services with multiple request/response round trips to perform a single logical operation can consume system and network resources, resulting in poor application performance. Looking at the generated SQL, we can see that the query is now parameterized, which will prevent the dreaded SQL injection attack. Dynamic SQL can be a powerful tool. It can also be dangerous if placed in the hands of the wrong users. Even for users who aren t malicious, the dynamic SQL option can allow them to create queries that cause poor performance due to a lack of proper indexing for the query in question. Many database administrators will object to the overuse of dynamic SQL. While it definitely has its place, try to come up with other options before traversing down this route. c# create editable pdf C# .NET PDF Manipulation API - Aspose
C# ASP.NET VB.NET library to generate edit and parse PDF files. Library converts PDF to multiple formats including DOC, DOCX, XLS, XLSX, PPTX HTML and ... c# edit pdf C# tutorial: add content to an existing PDF document
In this C# tutorial you will learn to modify an existing PDF document by ... iTextSharp libray assists you to accomplish this task through the use of the PdfStamper class. ... (used to add content to the PDF pages) from the PdfStamper class by using the ... The example code below reads two pages from the iTextAction.pdf file. At the opposite end of the spectrum from dynamic SQL lies the precompiled stored procedures that are included with SQL Server. Although standard LINQ to SQL methods can often be fine for simple CRUD operations, often business forces demand the use of stored procedures. The most typical reasons for reliance on stored procedures revolve around security, performance, auditing, or additional functionality. In some cases, LINQ to SQL s use of parameterized queries reduces the concerns from a performance and security perspective. From the performance perspective, the parameterized queries execution plans are evaluated once and cached, just as they are for stored procedures. From the security perspective, parameterized queries eliminate the possibility of SQL injection attacks. LINQ to I normally tell folks that anything in a script will run exactly as if you manually typed it into the shell, or if you copied the script to the clipboard and pasted it into the shell. That s not entirely true, though. Consider this simple script: Using threads efficiently If you use a user interface (UI) thread to perform blocking I/O bound calls, the UI may seem unresponsive to the user Creating a large number of unnecessary threads can result in poor performance because of the overhead of creating and shutting down threads Using transactions efficiently If the client has local data, then using atomic transactions can help you to ensure that that data is consistent Because the data is local, the transaction is also local rather than distributed For smart clients that are working offline, any changes made to the local data are tentative The client needs to synchronize the changes when it goes online again For data that is not local, it is possible to use distributed transactions in some cases (for example when services are in the same physical location with good connectivity and where the service supports it). SQL still requires server permissions at the table level, which some database administrators (DBAs) are reluctant to allow. Also, stored procedures allow the DBA to control the data access and customize itextsharp edit existing pdf c# C# .NET PDF Manipulation API - Aspose
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