NameValuePair Class in VB.NET

Maker PDF-417 2d barcode in VB.NET NameValuePair Class

NameValuePair Class
Create PDF417 In Visual Basic .NET
Using Barcode creator for VS .NET Control to generate, create PDF 417 image in .NET framework applications.
www.OnBarcode.com
Recognizing PDF417 In Visual Basic .NET
Using Barcode recognizer for .NET framework Control to read, scan read, scan image in Visual Studio .NET applications.
www.OnBarcode.com
The NameValuePair class defines the child objects to be contained in the collection: each of which contains a name (key) and value. It is defined as a nested class inside the NameValueListBase class: <Serializable()> _ Public Class NameValuePair Private mKey As K Private mValue As V Public ReadOnly Property Key() As K Get Return mKey End Get End Property
Painting UPC-A Supplement 2 In Visual Basic .NET
Using Barcode generator for Visual Studio .NET Control to generate, create Universal Product Code version A image in VS .NET applications.
www.OnBarcode.com
Generate Code128 In VB.NET
Using Barcode maker for Visual Studio .NET Control to generate, create Code 128C image in .NET framework applications.
www.OnBarcode.com
CHAPTER 5 s COMPLETING THE FRAMEWORK
Matrix Generator In VB.NET
Using Barcode encoder for .NET framework Control to generate, create 2D image in VS .NET applications.
www.OnBarcode.com
USS Code 39 Creator In VB.NET
Using Barcode drawer for .NET Control to generate, create Code 3/9 image in .NET framework applications.
www.OnBarcode.com
Public Property Value() As V Get Return mValue End Get Set(ByVal value As V) mValue = value End Set End Property Public Sub New(ByVal key As K, ByVal value As V) mKey = key mValue = value End Sub End Class Because it is nested inside NameValueListBase, it has access to the K and V generic type parameters. These type parameters are used to define the types of the key and value items stored in each child object. Thanks to the code in the Csla.Core.ReadOnlyBindingList and in the .NET BindingList base classes, all the hard work is already done. The NameValueListBase is now a fully functioning read-only collection of name/value data. It even supports data binding to Windows Forms and Web Forms.
GS1 - 13 Creator In Visual Basic .NET
Using Barcode generator for .NET Control to generate, create EAN13 image in .NET framework applications.
www.OnBarcode.com
International Standard Book Number Printer In VB.NET
Using Barcode maker for VS .NET Control to generate, create Bookland EAN image in .NET framework applications.
www.OnBarcode.com
Key and Value Properties and Methods
Paint PDF-417 2d Barcode In Visual C#
Using Barcode maker for .NET Control to generate, create PDF 417 image in VS .NET applications.
www.OnBarcode.com
Painting PDF 417 In Visual Studio .NET
Using Barcode generation for ASP.NET Control to generate, create PDF 417 image in ASP.NET applications.
www.OnBarcode.com
However, it is relatively hard to use for validating data. There s no easy way to find a value given a key, or a key given a value. To simplify these common tasks, the class includes Key and Value properties: Public Function Value(ByVal key As K) As V For Each item As NameValuePair In Me If item.Key.Equals(key) Then Return item.Value End If Next Return Nothing End Function Public Function Key(ByVal value As V) As K For Each item As NameValuePair In Me If item.Value.Equals(value) Then Return item.Key End If Next Return Nothing End Function The Value property accepts a key (name) and returns the value corresponding to that key. The Key property does the reverse, accepting a value and returning the first matching key value. In either case, if the value is not found, then the default value of the generic type is returned. If the generic type is a reference type, this will be Nothing; otherwise, it is typically 0 or False. Similarly, there are ContainsKey() and ContainsValue() methods: Public Function ContainsKey(ByVal key As K) As Boolean For Each item As NameValuePair In Me If item.Key.Equals(key) Then Return True End If Next
EAN13 Creation In Java
Using Barcode printer for Java Control to generate, create GTIN - 13 image in Java applications.
www.OnBarcode.com
Barcode Generator In Java
Using Barcode encoder for Android Control to generate, create Barcode image in Android applications.
www.OnBarcode.com
CHAPTER 5 s COMPLETING THE FRAMEWORK
Recognize Barcode In VS .NET
Using Barcode scanner for VS .NET Control to read, scan read, scan image in Visual Studio .NET applications.
www.OnBarcode.com
Generating UPC - 13 In Objective-C
Using Barcode generation for iPhone Control to generate, create EAN 13 image in iPhone applications.
www.OnBarcode.com
Return False End Function Public Function ContainsValue(ByVal value As V) As Boolean For Each item As NameValuePair In Me If item.Value.Equals(value) Then Return True End If Next Return False End Function Collectively, these properties and methods make it easy for a UI or business developer to use the name/value list to validate values and to translate between keys and values.
Create PDF-417 2d Barcode In .NET Framework
Using Barcode creator for ASP.NET Control to generate, create PDF 417 image in ASP.NET applications.
www.OnBarcode.com
Barcode Reader In None
Using Barcode reader for Software Control to read, scan read, scan image in Software applications.
www.OnBarcode.com
ICloneable Implementation
UCC - 12 Decoder In C#
Using Barcode recognizer for .NET framework Control to read, scan read, scan image in VS .NET applications.
www.OnBarcode.com
ANSI/AIM Code 39 Encoder In None
Using Barcode drawer for Online Control to generate, create Code 3 of 9 image in Online applications.
www.OnBarcode.com
As with the framework base classes from 3, the ICloneable interface is implemented. This is done using the Csla.ObjectCloner class: Private Function ICloneable_Clone() As Object Implements ICloneable.Clone Return GetClone() End Function <EditorBrowsable(EditorBrowsableState.Advanced)> _ Protected Overridable Function GetClone() As Object Return ObjectCloner.Clone(Me) End Function Public Overloads Function Clone() As NameValueListBase(Of K, V) Return DirectCast(GetClone(), NameValueListBase(Of K, V)) End Function The strongly typed Clone() method is Public, while the loosely typed implementation can only be accessed through the ICloneable interface.
Make Barcode In .NET Framework
Using Barcode generator for Reporting Service Control to generate, create Barcode image in Reporting Service applications.
www.OnBarcode.com
Code 39 Scanner In C#.NET
Using Barcode recognizer for Visual Studio .NET Control to read, scan read, scan image in VS .NET applications.
www.OnBarcode.com
Data Access
The final functionality required is support for data access. As with all business objects, the data portal will be used to invoke an appropriate DataPortal_XYZ method. Since this base class only supports read-only lists, only the DataPortal_Fetch() method is marked as Protected: Protected Overridable Sub DataPortal_Fetch(ByVal criteria As Object) Throw New NotSupportedException(My.Resources.FetchNotSupportedException) End Sub This is comparable to the functionality added to BusinessBase or ReadOnlyBase in 4. The business developer must override or overload this method to implement the data access code that loads the name/value data from the database. As with the other CSLA .NET base classes, the DataPortal_OnDataPortalInvoke(), DataPortal_ OnDataPortalInvokeComplete(), and DataPortal_OnDataPortalException() methods are also declared as Protected and Overridable. The primary difference from the base class code added in 4 is that NameValueListBase also includes a Protected criteria class:
Copyright © OnBarcode.com . All rights reserved.