pdf annotation in c#

iTextSharp - Drawing shapes and Graphics - Mikesdotnetting
17 Nov 2008 ... iTextSharp includes a lot of functionality that covers simple drawing to ... + "/ Graphics. pdf ", FileMode.Create));. doc. Open ();. PdfContentByte cb ...

itextsharp add annotation to existing pdf c#

itextsharp -questions - C# Adding Annotations to PdfCopy, Adding ...
C# Adding Annotations to PdfCopy, Adding /Removing info from Stamper. First I really appreciate this list. I have been working with iText for years, and have recently switch to .Net C# . ... Source pdf has MyInfoToRemove and MoreInfoToRemove ... Add ("MyInfoToRemove", null);// to Remove Existing Info. h2.

Now that you have a query that takes longer to execute, your intention is that when the user clicks on Populate Arraylist, instead of blocking the UI, you instead use the BeginExecuteReader method of the SqlCommand object and pass it a callback method and the command object. The callback method is what will be called when the command execution completes. By doing so, we are telling the BeginExecuteReader method to Go ahead and begin executing the method to get me a data reader, and when you are done, please call my callback, and also please remember to return this command object to me so I can remember what we were talking about. Let s see how this looks in code. You can follow these four steps, or look at Example 5-4 in the associated code download for this chapter. 1. Starting with the code you have written for Example 5.3, replace the call to ExecuteReader with a call to BeginExecuteReader as shown here:

AsyncCallback callback = new AsyncCallback(DataReaderIsReady); IAsyncResult asyncresult = testCommand.BeginExecuteReader(callback, testCommand);

foo.visible(); //-> true foo.toggle(); foo.visible(); //-> false foo.toggle(); foo.visible(); //-> true Element#toggle is a handy abstraction for elements that should have their display

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Dim callback as AsyncCallback = new AsyncCallback(DataReaderIsReady) Dim asyncresult as IAsyncResult = _ testCommand.BeginExecuteReader(callback, testCommand) The biggest advantage of this approach is that since calling BeginExecuteReader is nonblocking (i.e., you ll be given the control of your thread back), you have the ability to continue processing on something else (like repainting your UI) while the command is being executed. 2. Add code for DataReaderIsReady, which is the method specified in the new AsyncCallback call. This is the method that s called when BeginExecuteReader is done processing. This code is shown in Listings 5-9 and 5-10. Listing 5-9. Callback Implementation for BeginExecuteDataReader in C# private void DataReaderIsReady(IAsyncResult result) { MessageBox.Show("Results Load Complete", "I'm Done"); SqlCommand testCommand = (SqlCommand)result.AsyncState; SqlDataReader sqlDr = testCommand.EndExecuteReader(result); if (sqlDr.HasRows) { foreach (DbDataRecord rec in sqlDr) { dbRecordsHolder.Add(rec); } } sqlDr.Close(); cmd.Connection.Dispose(); //Do not forget to at least close, if not dispose } Listing 5-10. Callback Implementation for BeginExecuteDataReader in Visual Basic .NET Private Sub DataReaderIsReady(ByVal result As IAsyncResult) MessageBox.Show("Results Load Complete", "I'm Done") Dim testCommand As SqlCommand = CType(result.AsyncState, SqlCommand) Dim sqlDr As SqlDataReader = testCommand.EndExecuteReader(result) If sqlDr.HasRows Then For Each rec As DbDataRecord In sqlDr dbRecordsHolder.Add(rec) Next End If sqlDr.Close() cmd.Connection.Dispose()'Do not forget to at least close, if not dispose End Sub