c# excel to pdf free library

how to save excel file as pdf using c#

how to save excel file as pdf using c#

pdf convert mac ocr scan, pdf disable option print using, pdf c# example text using, pdf all convert document file, pdf easy free online text,

byte to pdf c#, convert pdf to jpg c# codeproject, convert pdf to tiff c# code, pdf to word c# open source, how to convert pdf to jpg in c# windows application, how to convert pdf to jpg in c# windows application, pdf page to image c# itextsharp, pdf to tiff c# code, pdf annotation in c#, pdf annotation in c#, c# convert pdf to image free library, c# pdf free, pdf to jpg c# open source, extract pdf to excel c#, c# pdf to png

itextsharp aspx to pdf example, asp net mvc 5 pdf viewer, how to read pdf file in asp.net using c#, print mvc view to pdf, how to write pdf file in asp.net c#, print pdf in asp.net c#, asp.net pdf viewer c#, asp.net print pdf directly to printer, dinktopdf asp.net core, display pdf in iframe mvc

c# excel to pdf free library,
utility to convert excel to pdf in c#,
c# convert excel to pdf without office,
convert excel to pdf using c# windows application,
c# excel to pdf free library,
utility to convert excel to pdf in c#,
c# excel to pdf open source,
utility to convert excel to pdf in c#,
c# export excel sheet to pdf,

The first step is to register the methods that perform the asynchronous task. This step is the same in any asynchronous web page: protected void Page_Load(object sender, EventArgs e) { // Register the asynchronous methods for later use. // This method returns immediately. Page.AddOnPreRenderCompleteAsync(BeginTask, EndTask); } When the BeginTask() method is called, you can launch the asynchronous operation: // The ADO.NET objects need to be accessible in several different // event handlers, so they must be declared as member variables. private SqlConnection con; private SqlCommand cmd; private SqlDataReader reader; private IAsyncResult BeginTask(object sender, EventArgs e, AsyncCallback cb, object state) { // Create the command. string connectionString = WebConfigurationManager.ConnectionStrings ["NorthwindAsync"].ConnectionString; con = new SqlConnection(connectionString); cmd = new SqlCommand("SELECT * FROM Employees", con); // Open the connection. // This part is not asynchronous. con.Open(); // Run the query asynchronously. // This method returns immediately and provides ASP.NET // with the IAsyncResult object it needs to track progress. return cmd.BeginExecuteReader(cb, state); } The EndTask() method fires automatically when the IAsyncResult object indicates the BeginExecuteReader() method has finished its work and retrieved all the data: private void EndTask(IAsyncResult ar) { // You can now retrieve the DataReader. reader = cmd.EndExecuteReader(ar); } If you want to perform more page processing, you can handle the Page.PreRenderComplete event. In this example, this is the point where the grid is filled with the retrieved data: protected void Page_PreRenderComplete(object sender, EventArgs e) { grid.DataSource = reader; grid.DataBind(); con.Close(); }

Here s an example of property procedure that maintains a thread-safe global collection of metadata: private static Dictionary<string, string> metadata = new Dictionary<string, string>(); public void AddMetadata(string key, string value) { lock (metadata) { metadata[key] = value; } } public string GetMetadata(string key) { lock (metadata) { return metadata[key]; } } Using static member variables instead of the Application collection has two advantages First, it allows you to write custom code in a property procedure You could use this code to log how many times a value is being accessed, to check if the data is still valid, or to re-create it Here s an example that uses a lazy initialization pattern and creates the global object only when it s first requested: private static string[] fileList; public static string[] FileList { get { if (fileList == null) { fileList = DirectoryGetFiles(.

c# pdf to tiff open source, gencode128.dll c#, convert pdf to image asp.net c#, ssrs pdf 417, pdf to word c# open source, itextsharp pdf to excel c#

<xsl:template match="DVD"> <hr/> <h3><u><xsl:value-of select="Title" /></u></h3> <b>Price: </b> <xsl:value-of select="Price" /><br/> <b>Director: </b> <xsl:value-of select="Director" /><br/> <xsl:apply-templates select="Starring" /> </xsl:template>

Finally, you need to override the Dispose() method of the page to ensure that the connection is closed in the event of an error: public override void Dispose() { if (con != null) con.Close(); base.Dispose(); } Overall, the asynchronous data retrieval makes this page more complex. The actual binding needs to be performed by hand, and it spans several methods. However, the end result is a more scalable web application, assuming the query takes a significant amount of time to execute.

Reading an XML file with an XmlTextReader object is the simplest approach, but it also provides the least flexibility. The file is read in sequential order, and you can t freely move to the parent, child, and sibling nodes as you can with XmlDocument and XPathNavigator. Instead, you read a node at a time from a stream. For this reason, the code is in a single nonrecursive method, which is more straightforward. It also makes it easy to scan through an entire XML document until you find the node that interests you. The following code starts by loading the source file in an XmlTextReader object. It then begins a loop that moves through the document one node at time. To move from one node to the next, you call the XmlTextReader.Read() method. This method returns true until it moves past the last node, at which point it returns false. This is similar to the approach used by the DataReader class, which retrieves query results from a database.

Using this template and the XsCompiledlTransform class (contained in the System.Xml.Xsl namespace), you can transform the DVD list into formatted HTML. Here s the code that performs this transformation and saves the result to a new file: Dim xslFile As String = Server.MapPath("DvdList.xsl") Dim xmlFile As String = Server.MapPath("DvdList.xml") Dim htmlFile As String = Server.MapPath("DvdList.htm") Dim transf As New XslCompiledTransform() transf.Load(xslFile) transf.Transform(xmlFile, htmlFile) Alternatively, you could use an overload of the Transform method to directly write to the Response buffer like this: transf.Transform(xmlFile,Nothing,Response.OutputStream) Figure 12-8 shows the resulting page.

Currently, the asynchronous DataReader page has no error-handling code, which makes it unsuitable for a real-world application Implementing error handling isn t difficult, but because of the multistage nature of asynchronous pages, it may need to be performed in several places The easiest part of error handling is dealing with exceptions that occur during the asynchronous operation By convention, these exceptions are thrown when you call the EndXxx() method In the DataReader example, that means any query problems will cause an exception to be thrown when you call EndExecuteReader() Here s how you catch it: private void EndTask(IAsyncResult ar) { // You can now retrieve the DataReader try { reader = cmdEndExecuteReader(ar); } catch (SqlException err) { lblErrorText = "The query failed"; } } You can test this code by modifying the query to be intentionally incorrect.

birt code 128, asp.net core qr code reader, asp.net core barcode generator, birt ean 128