barcode printing vb.net Part IV in C#

Creator PDF417 in C# Part IV

Part IV
PDF-417 2d Barcode Encoder In Visual C#
Using Barcode generator for Visual Studio .NET Control to generate, create PDF417 image in Visual Studio .NET applications.
www.OnBarcode.com
PDF417 Recognizer In Visual C#.NET
Using Barcode decoder for .NET Control to read, scan read, scan image in VS .NET applications.
www.OnBarcode.com
Core Facilities
Bar Code Maker In Visual C#
Using Barcode drawer for .NET Control to generate, create barcode image in VS .NET applications.
www.OnBarcode.com
Barcode Decoder In C#
Using Barcode reader for Visual Studio .NET Control to read, scan read, scan image in .NET framework applications.
www.OnBarcode.com
When calling any of these methods, the Binder-derived object is used to perform type conversions on the supplied method parameters, such as converting an Int32 argument to an Int64, so that the already selected method can be called . As for the BindingFlags parameter, the only flag that can be passed here is BindingFlags.SuppressChangeType . However, binders are free to ignore this flag . Fortunately, the DefaultBinder class heeds this flag . When DefaultBinder sees this flag, it won t convert any arguments . If you use this flag and the arguments passed don t match the arguments expected by the method, an ArgumentException will be thrown . Usually when you use the BindingFlags.ExactBinding flag to bind to a member, you ll specify the BindingFlags.SuppressChangeType flag to invoke the member . If you don t use these two flags in tandem, it s unlikely that invoking the member will be successful unless the arguments you pass happen to be exactly what the method expects . By the way, if you call MemberInfo s InvokeMethod to bind and invoke a member, you ll probably want to specify both or neither of the two binding flags . The following sample application demonstrates the various ways to use reflection to access a type s members . The SomeType class represents a type that has various members: a private field (m_someField), a public constructor (SomeType) that takes an Int32 argument passed by reference, a public method (ToString), a public property (SomeProp), and a public event (SomeEvent) . Having defined the SomeType type, I offer three different methods that use reflection to access SomeType s members . Each method uses reflection in a different way to accomplish the same thing:
Painting PDF 417 In Visual Studio .NET
Using Barcode maker for ASP.NET Control to generate, create PDF-417 2d barcode image in ASP.NET applications.
www.OnBarcode.com
Painting PDF 417 In Visual Studio .NET
Using Barcode generator for VS .NET Control to generate, create PDF 417 image in Visual Studio .NET applications.
www.OnBarcode.com
The UseInvokeMemberToBindAndInvokeTheMember method demonstrates how to use Type s InvokeMember to both bind and invoke a member . The BindToMemberThenInvokeTheMember method demonstrates how to bind to a member and invoke it later . This technique yields faster-performing code if you intend to invoke the same member on different objects multiple times . The BindToMemberCreateDelegateToMemberThenInvokeTheMember method demonstrates how to bind to an object or member, and then it creates a delegate that refers to that object or member . Calling through the delegate is very fast, and this technique yields even faster performance if you intend to invoke the same member on the same object multiple times . The UseDynamicToBindAndInvokeTheMember method demonstrates how to use C# dynamic primitive type (discussed at the end of 5, Primitive, Reference, and Value Types ) to simplify the syntax for accessing members . In addition, this technique can give reasonably good performance if you intend to invoke the same member on different objects that are all of the same type because the binding will happen once per type and be cached so that it can be invoked multiple times quickly . You can also use this technique to invoke a member on objects of different types .
PDF-417 2d Barcode Creation In VB.NET
Using Barcode drawer for VS .NET Control to generate, create PDF417 image in .NET framework applications.
www.OnBarcode.com
Printing Bar Code In C#
Using Barcode creator for VS .NET Control to generate, create barcode image in VS .NET applications.
www.OnBarcode.com
23 Assembly Loading and Reflection
UCC - 12 Encoder In Visual C#.NET
Using Barcode maker for .NET Control to generate, create UCC.EAN - 128 image in Visual Studio .NET applications.
www.OnBarcode.com
Painting EAN13 In Visual C#
Using Barcode generator for .NET Control to generate, create GS1 - 13 image in VS .NET applications.
www.OnBarcode.com
using System; using System.Reflection; using Microsoft.CSharp.RuntimeBinder;
ANSI/AIM Code 39 Printer In Visual C#
Using Barcode maker for VS .NET Control to generate, create Code-39 image in Visual Studio .NET applications.
www.OnBarcode.com
Draw GS1 - 12 In C#
Using Barcode generator for .NET framework Control to generate, create GS1 - 12 image in VS .NET applications.
www.OnBarcode.com
// This class is used to demonstrate reflection // It has a field, constructor, method, property, and an event internal sealed class SomeType { private Int32 m_someField; public SomeType(ref Int32 x) { x *= 2; } public override String ToString() { return m_someField.ToString(); } public Int32 SomeProp { get { return m_someField; } set { if (value < 1) throw new ArgumentOutOfRangeException("value"); m_someField = value; } public event EventHandler SomeEvent; private void NoCompilerWarnings() { SomeEvent.ToString();} } public static class Program { private const BindingFlags c_bf = BindingFlags.DeclaredOnly | BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance; public static void Main() { Type t = typeof(SomeType); UseInvokeMemberToBindAndInvokeTheMember(t); Console.WriteLine(); BindToMemberThenInvokeTheMember(t); Console.WriteLine(); BindToMemberCreateDelegateToMemberThenInvokeTheMember(t); Console.WriteLine(); UseDynamicToBindAndInvokeTheMember(t); Console.WriteLine(); }
Barcode Printer In Java
Using Barcode printer for Eclipse BIRT Control to generate, create barcode image in BIRT reports applications.
www.OnBarcode.com
UPC-A Scanner In C#.NET
Using Barcode scanner for .NET Control to read, scan read, scan image in Visual Studio .NET applications.
www.OnBarcode.com
private static void UseInvokeMemberToBindAndInvokeTheMember(Type t) { Console.WriteLine("UseInvokeMemberToBindAndInvokeTheMember"); // Construct an instance of the Type Object[] args = new Object[] { 12 }; // Constructor arguments Console.WriteLine("x before constructor called: " + args[0]); Object obj = t.InvokeMember(null, c_bf | BindingFlags.CreateInstance, null, null, args); Console.WriteLine("Type: " + obj.GetType().ToString()); Console.WriteLine("x after constructor returns: " + args[0]);
Encoding UPCA In Java
Using Barcode encoder for Java Control to generate, create GS1 - 12 image in Java applications.
www.OnBarcode.com
Barcode Encoder In Visual Studio .NET
Using Barcode maker for .NET Control to generate, create barcode image in Visual Studio .NET applications.
www.OnBarcode.com
Barcode Maker In Java
Using Barcode printer for Eclipse BIRT Control to generate, create barcode image in BIRT applications.
www.OnBarcode.com
ANSI/AIM Code 39 Creator In Visual Studio .NET
Using Barcode creation for Reporting Service Control to generate, create Code 39 image in Reporting Service applications.
www.OnBarcode.com
Painting PDF417 In None
Using Barcode encoder for Font Control to generate, create PDF417 image in Font applications.
www.OnBarcode.com
Draw Bar Code In .NET
Using Barcode generation for Reporting Service Control to generate, create barcode image in Reporting Service applications.
www.OnBarcode.com
Copyright © OnBarcode.com . All rights reserved.