c# gtin End If End Sub in Visual C#.NET

Creator EAN13 in Visual C#.NET End If End Sub

End If End Sub
European Article Number 13 Creator In C#.NET
Using Barcode generator for VS .NET Control to generate, create EAN / UCC - 13 image in .NET framework applications.
www.OnBarcode.com
Reading EAN-13 In C#.NET
Using Barcode reader for .NET Control to read, scan read, scan image in Visual Studio .NET applications.
www.OnBarcode.com
7
Generate Barcode In C#
Using Barcode creator for Visual Studio .NET Control to generate, create bar code image in .NET framework applications.
www.OnBarcode.com
Read Bar Code In C#
Using Barcode reader for Visual Studio .NET Control to read, scan read, scan image in .NET framework applications.
www.OnBarcode.com
Method Invocations and Event Management with .NET Web Services
EAN-13 Encoder In VS .NET
Using Barcode encoder for ASP.NET Control to generate, create EAN 13 image in ASP.NET applications.
www.OnBarcode.com
EAN 13 Creator In Visual Studio .NET
Using Barcode encoder for Visual Studio .NET Control to generate, create European Article Number 13 image in .NET framework applications.
www.OnBarcode.com
Public Shadows Sub CancelAsync(ByVal userState As Object) MyBase.CancelAsync(userState) End Sub //C# public event GetCompanyNameCompletedEventHandler GetCompanyNameCompleted; [System.Web.Services.Protocols.SoapDocumentMethodAttribute( "http://tempuri.org/GetCompanyName", RequestNamespace="http://tempuri.org/", ResponseNamespace="http://tempuri.org/", Use=System.Web.Services.Description.SoapBindingUse.Literal, ParameterStyle= System.Web.Services.Protocols.SoapParameterStyle.Wrapped)] public string GetCompanyName(string tickerSymbol) { object[] results = this.Invoke("GetCompanyName", new object[] { tickerSymbol}); return ((string)(results[0])); } /// <remarks/> public void GetCompanyNameAsync(string tickerSymbol) { this.GetCompanyNameAsync(tickerSymbol, null); } /// <remarks/> public void GetCompanyNameAsync(string tickerSymbol, object userState) { if ((this.GetCompanyNameOperationCompleted == null)) { this.GetCompanyNameOperationCompleted = new System.Threading.SendOrPostCallback( this.OnGetCompanyNameOperationCompleted); } this.InvokeAsync("GetCompanyName", new object[] { tickerSymbol}, this.GetCompanyNameOperationCompleted, userState); } private void OnGetCompanyNameOperationCompleted(object arg) { if ((this.GetCompanyNameCompleted != null)) { System.Web.Services.Protocols.InvokeCompletedEventArgs invokeArgs = ((System.Web.Services.Protocols.InvokeCompletedEventArgs) (arg)); this.GetCompanyNameCompleted(this, new GetCompanyNameCompletedEventArgs(invokeArgs.Results, invokeArgs.Error, invokeArgs.Cancelled, invokeArgs.UserState)); } } [System.CodeDom.Compiler.GeneratedCodeAttribute("System.Web.Services", "2.0.50727.42")] public delegate void GetCompanyNameCompletedEventHandler( object sender, GetCompanyNameCompletedEventArgs e);
Drawing EAN13 In Visual Basic .NET
Using Barcode creator for Visual Studio .NET Control to generate, create EAN / UCC - 13 image in .NET framework applications.
www.OnBarcode.com
DataMatrix Printer In Visual C#
Using Barcode encoder for .NET Control to generate, create Data Matrix 2d barcode image in .NET framework applications.
www.OnBarcode.com
Lesson 1: Calling Web Methods
Bar Code Printer In C#.NET
Using Barcode generation for Visual Studio .NET Control to generate, create barcode image in .NET applications.
www.OnBarcode.com
QR Code ISO/IEC18004 Encoder In Visual C#.NET
Using Barcode drawer for VS .NET Control to generate, create QR Code JIS X 0510 image in VS .NET applications.
www.OnBarcode.com
[System.CodeDom.Compiler.GeneratedCodeAttribute("System.Web.Services", "2.0.50727.42")] [System.Diagnostics.DebuggerStepThroughAttribute()] [System.ComponentModel.DesignerCategoryAttribute("code")] public partial class GetCompanyNameCompletedEventArgs : System.ComponentModel.AsyncCompletedEventArgs { private object[] results; internal GetCompanyNameCompletedEventArgs(object[] results, Exception exception, bool cancelled, object userState) :
Creating UCC-128 In Visual C#.NET
Using Barcode encoder for .NET Control to generate, create EAN / UCC - 14 image in Visual Studio .NET applications.
www.OnBarcode.com
Delivery Point Barcode (DPBC) Printer In Visual C#.NET
Using Barcode maker for .NET framework Control to generate, create Postnet image in .NET framework applications.
www.OnBarcode.com
base(exception, cancelled, userState) {
Making Data Matrix ECC200 In Java
Using Barcode creation for Java Control to generate, create Data Matrix image in Java applications.
www.OnBarcode.com
Create Barcode In Java
Using Barcode creation for Java Control to generate, create barcode image in Java applications.
www.OnBarcode.com
this.results = results;
Print European Article Number 13 In Java
Using Barcode printer for Eclipse BIRT Control to generate, create GTIN - 13 image in Eclipse BIRT applications.
www.OnBarcode.com
EAN-13 Drawer In Java
Using Barcode creation for Android Control to generate, create EAN-13 image in Android applications.
www.OnBarcode.com
} /// <remarks/>
QR Code JIS X 0510 Creation In VS .NET
Using Barcode generator for ASP.NET Control to generate, create Denso QR Bar Code image in ASP.NET applications.
www.OnBarcode.com
EAN 13 Recognizer In Visual Basic .NET
Using Barcode decoder for .NET framework Control to read, scan read, scan image in .NET framework applications.
www.OnBarcode.com
public string Result {
Making QR Code In None
Using Barcode generator for Online Control to generate, create QR image in Online applications.
www.OnBarcode.com
Generating PDF 417 In None
Using Barcode creation for Software Control to generate, create PDF 417 image in Software applications.
www.OnBarcode.com
get {
this.RaiseExceptionIfNecessary();
return ((string)(this.results[0]));
} } }
If you examine this code closely, you ll probably see the specific code that allows for asynchronous invocation. (Hint: look for async.) Now, change the original code defi nition slightly to call the GetCompanyNameAsync method:
'VB Public Sub GetTickerSymbol() Dim Lookup As New StockLookupService() Console.WriteLine(Lookup.GetCompanyNameAsync("MSFT")) End Sub //C# public static void GetTickerSymbol() { StockLookupService Lookup = new StockLookupService(); Console.WriteLine(Lookup.GetCompanyNameAsync("MSFT")); }
If you try to compile and run this code, it fails, indicating that the return type from the method call isn t valid. Lest there be any confusion, this modified code won t work. That s because calling an asynchronous method is a little more involved. The answer to why the return type from the method call is no longer valid rests in the proxy class, the relevant portions of which are provided here:
'VB Public Overloads Sub GetCompanyNameAsync(ByVal tickerSymbol As String) Me.GetCompanyNameAsync(tickerSymbol, Nothing)
7
Method Invocations and Event Management with .NET Web Services
End Sub Public Overloads Sub GetCompanyNameAsync(ByVal tickerSymbol As String, _
ByVal userState As Object)
If (Me.GetCompanyNameOperationCompleted Is Nothing) Then
Me.GetCompanyNameOperationCompleted = _ AddressOf Me.OnGetCompanyNameOperationCompleted End If Me.InvokeAsync("GetCompanyName", New Object() {tickerSymbol}, _ Me.GetCompanyNameOperationCompleted, userState)
End Sub
//C# public void GetCompanyNameAsync(string tickerSymbol) {
this.GetCompanyNameAsync(tickerSymbol, null);
public void GetCompanyNameAsync(string tickerSymbol, object userState) {
if ((this.GetCompanyNameOperationCompleted == null)) {
this.GetCompanyNameOperationCompleted =
new System.Threading.SendOrPostCallback(
this.OnGetCompanyNameOperationCompleted);
this.InvokeAsync("GetCompanyName", new object[] {
tickerSymbol}, this.GetCompanyNameOperationCompleted,
userState);
The most glaring difference is the return type. Notice that a string is no longer returned. In fact, the Visual Basic .NET method signature now specifies a Sub (which indicates there is no return type) and the C# return type now specifies void (which also indicates lack of a return type). How do you handle this situation and make an asynchronous call
CAUTION
Be careful when introducing changes that break existing code
One adage of object-oriented design is that classes should be closed for modification but open for extension. Although I could write a few chapters on this principle alone, it essentially means that after you create a class, the interface for it shouldn t change. If you have a method named GetStockSymbol that accepts a single string argument and returns a string, you should not change the return type, change the parameter type, or add or remove parameters. People incorrectly assume that this principle means that the actual implementation of the method should never be changed. If this were the case, then every time you fixed a bug you d be violating good object-oriented pro gramming design principles, which clearly isn t the case. For some reason, many developers who are otherwise careful not to change the interface of a tra ditional class have no such compunction when it comes to Web services. Keep in mind that from the client s perspective, there is literally no difference between calling a Web service s method and any other method. Remember that a proxy class is created that matches the Web service, and objects instantiated from this proxy class contain the methods that are invoked. Any changes that
Copyright © OnBarcode.com . All rights reserved.