pdf editor online free remove pages

convert pdf to pages document online

annotate pdf online, convert pdf to outlines online, insert image in pdf online, how to edit and delete text in pdf file online free, convert pdf to excel mac free online, convert pdf to scanned image online, convert pdf to jpg windows 10 online free, pdf to powerpoint converter online free, free online convert pdf to editable word document, generate pdf from html online, excel to pdf converter download online, image to pdf converter free online, jpg to pdf converter online free mac, tiff to pdf converter free download online, adobe convert word to pdf online, pdf text editor free online, pdf size reducer software online, pdf merge mac free online, crack pdf password online, sharepoint online search pdf preview, pdf split online, pdf thumbnail generator online, pdf editor without watermark online, convert pdf to text online free ocr, pdf page delete software online, online pdf printing service, extract images from pdf online, extract text from pdf online, get coordinates of text in pdf online, open pdf url online, convert pdf to wps writer online, add image to pdf online, how to add text to pdf file online, remove text watermark from pdf online, replace text in pdf file online free

In the following code, the catch clause of a previous example has been modified to specifically handle exceptions of the DivideByZeroException class. While in the other example, the catch clause would handle any exception raised in the try block, the current example will only handle those of the DivideByZeroException class. int x = 10; try { int y = 0; x /= y; // Raises an exception } Exception type catch ( DivideByZeroException ) { ... Console.WriteLine("Handling an exception."); } For example, you could further modify the catch clause to use an exception variable. This allows you to access the exception object inside the catch block. int x = 10; try { int y = 0; x /= y; // Raises an exception } Exception type Exception variable catch ( DivideByZeroException e ) { Accessing the exception variable Console.WriteLine("Message: {0}", e.Message ); Console.WriteLine("Source: {0}", e.Source ); Console.WriteLine("Stack: {0}", e.StackTrace ); } This produces the following output: Message: Attempted to divide by zero. Source: Exceptions 1 Stack: at Exceptions_1.Program.Main() in C:\Progs\Exceptions 1\Exceptions 1\ Program.cs:line 14

function onPropertyChanged(sender, e) { if(e.get_propertyName() == 'fullName') { alert('New value for the fullName property: ' + sender.get_fullName()); } } //--> </script>

In fact, it has revealed a small problem: the tempuri.org that appears in the URL indicates something temporary that we re supposed to fill in the ServiceContract attribute on the original service definition has a Namespace attribute, and we re supposed to pick a URI that is unique to our service. It s not mandatory in this particular scenario because everything works with the default, but a temporary-looking URI doesn t look entirely professional. It could be worse. See http://www.neopoleon.com/home/blogs/neo/archive/2003/09/29/5458 .aspx.

doesn t make this problem any easier to solve, of course, but it makes it less likely for changes to creep in by accident and go undetected. A complete solution to the problem of service evolution is beyond the scope of this book, so for now, just be aware that changing a contract should not be undertaken lightly.

Looking further through the Reference.cs file generated by adding the service reference, the next most interesting feature after the contract is a class called ChatServiceClient. This implements IChatService, because it acts as a proxy for the service. If we want to communicate with the service, all we need to do is create an instance of this proxy and invoke the method representing the operation we d like to perform. So if we add a using ChatClient.ChatService; directive to the top of Program.cs in ChatClient, we can then modify its Main method as shown in Example 13-5.

static void Main(string[] args) { using (ChatServiceClient chatProxy = new ChatServiceClient()) { } chatProxy.PostNote("Ian", "Hello again, world");

The catch clauses section can contain multiple catch clauses. Figure 11-4 shows a summary of the catch clauses section.

}

Notice the using statement it s important to ensure that you dispose of WCF proxies when you have finished using them. When the client calls this method on the proxy, WCF builds a message containing the inputs, and it sends that to the service. Over in the service (which is running in a separate process, perhaps on a different machine) WCF will receive that message, unpack the inputs, and pass them to the PostNote method in the ChatService class. To try this out, we re going to need to run both the client and the server simultaneously. This means configuring the solution in Visual Studio a little differently. If you rightclick on the WcfChat solution in the Solution Explorer and select Set Startup Projects, the dialog that opens offers three radio buttons. If you select the Multiple Startup Projects radio button, you can choose which of your projects you d like to run when debugging. In this case, we want to change the Action for both the ChatClient and ChatHost projects from None to Start. (We leave the ChatServerLibrary Action as None we don t need to run that project, because our ChatHost project hosts the server library.) Also, we want to give the service a head start so that it s running before the

client tries to use it, so select ChatHost and click the up arrow next to the list, to tell Visual Studio to run it first. (In theory, this is not a reliable technique, because there s no guarantee that the server will get enough of a head start. In practice, it appears to work well enough for this sort of debugging exercise.) Figure 13-8 shows how these settings should look.

If we run the program by pressing F5, two console windows will open, one for the client and one for the service.

Figure 11-4. Structure of the catch clauses section of a try statement When an exception is raised, the list of catch clauses is searched in order, and the first catch clause that matches the type of the exception object is executed. Because of this, there are two important rules in ordering the catch clauses. They are the following: The specific catch clauses must be ordered with the most specific exception types first, progressing to the most general. For example, if you declare an exception class derived from NullReferenceException, the catch clause for your derived exception type should be listed before the catch clause for NullReferenceException. If there is a general catch clause, it must be the last clause after all specific catch clauses.

java pdf to jpg, javascript code to convert pdf to word, write image to pdf in java, create pdf in java