crystal report barcode font free StringRequired in VB.NET

Painting Quick Response Code in VB.NET StringRequired

StringRequired
Denso QR Bar Code Generator In Visual Basic .NET
Using Barcode drawer for .NET Control to generate, create Quick Response Code image in .NET framework applications.
www.OnBarcode.com
Scanning Quick Response Code In VB.NET
Using Barcode scanner for Visual Studio .NET Control to read, scan read, scan image in VS .NET applications.
www.OnBarcode.com
The simplest type of rule method is one that doesn t require any information beyond that provided by the basic RuleArgs parameter. For instance, the StringRequired() rule method only needs a reference to the object containing the value and the name of the property to be validated: Public Function StringRequired(ByVal target As Object, _ ByVal e As RuleArgs) As Boolean Dim value = DirectCast(CallByName(target, _ e.PropertyName, CallType.[Get]), String) If String.IsNullOrEmpty(value) Then e.Description = String.Format( _ My.Resources.StringRequiredRule, RuleArgs.GetPropertyName(e)) Return False End If Return True End Function The VB CallByName function is used to retrieve the property value. If the property value is Nothing or is an empty string, then the rule is broken, so the Description property of the RuleArgs object is set to describe the nature of the broken rule. Then False is returned from the rule method to indicate that the rule is broken. Otherwise, the rule method simply returns True to indicate that the rule is not broken. Notice the use of the GetPropertyName() method on the RuleArgs class to retrieve the property name. Although you can get the property name itself through e.PropertyName, the GetPropertyName() helper method will return the friendly name associated with the property if one exists, or the property
Generating UPC Symbol In Visual Basic .NET
Using Barcode creator for Visual Studio .NET Control to generate, create UPC Symbol image in .NET applications.
www.OnBarcode.com
Create PDF 417 In Visual Basic .NET
Using Barcode maker for .NET framework Control to generate, create PDF-417 2d barcode image in Visual Studio .NET applications.
www.OnBarcode.com
CHAPTER 11 BUS IN ESS AN D V ALIDA TION RULES
Paint EAN / UCC - 13 In Visual Basic .NET
Using Barcode printer for .NET Control to generate, create EAN / UCC - 13 image in Visual Studio .NET applications.
www.OnBarcode.com
Encoding Code39 In VB.NET
Using Barcode encoder for .NET framework Control to generate, create Code 3 of 9 image in VS .NET applications.
www.OnBarcode.com
name if there is no friendly name. In many cases, a friendly name such as Product name is a better value to show the user than the actual property name (like ProductName). This rule is used within a business object by associating it with a property. A business object does this by overriding the AddBusinessRules() method defined by BusinessBase. Such code would look like this (assuming the developer adds an Imports statement for Csla.Validation to the top of the code): <Serializable()> _ Public Class Customer Inherits BusinessBase(Of Customer) Protected Overrides Sub AddBusinessRules() ValidationRules.AddRule(CommonRules.StringRequired, NameProperty) End Sub ' rest of class... End Class This associates the rule method with the property defined by the NameProperty field (a PropertyInfo(Of String) value) so that the SetProperty() call within the property s Set block will invoke the rule automatically. You ll see this and other rule methods used in 17 within the sample application s business objects.
Matrix 2D Barcode Encoder In Visual Basic .NET
Using Barcode drawer for VS .NET Control to generate, create 2D image in .NET applications.
www.OnBarcode.com
Print Universal Product Code Version E In VB.NET
Using Barcode creation for Visual Studio .NET Control to generate, create GTIN - 12 image in Visual Studio .NET applications.
www.OnBarcode.com
StringMaxLength
Encoding QR Code JIS X 0510 In .NET
Using Barcode generator for Visual Studio .NET Control to generate, create QR Code image in VS .NET applications.
www.OnBarcode.com
QR Code ISO/IEC18004 Creation In Visual C#.NET
Using Barcode drawer for .NET framework Control to generate, create QR image in .NET framework applications.
www.OnBarcode.com
A slightly more complex variation is where the rule method needs extra information beyond that provided by the basic RuleArgs parameter. In these cases, the RuleArgs class must be subclassed to create a new object that adds the extra information. A rule method to enforce a maximum length on a string, for instance, requires the maximum length value.
Create Barcode In Objective-C
Using Barcode generator for iPhone Control to generate, create Barcode image in iPhone applications.
www.OnBarcode.com
Encoding Barcode In None
Using Barcode generation for Online Control to generate, create Barcode image in Online applications.
www.OnBarcode.com
Custom RuleArgs Class
GTIN - 128 Reader In C#
Using Barcode reader for .NET framework Control to read, scan read, scan image in VS .NET applications.
www.OnBarcode.com
Barcode Decoder In Visual Studio .NET
Using Barcode reader for .NET framework Control to read, scan read, scan image in .NET framework applications.
www.OnBarcode.com
I recommend using DecoratedRuleArgs, which is a subclass of RuleArgs. I say this because DecoratedRuleArgs stores the custom argument values in a Dictionary and thus provides a standardized way by which the code in AddBusinessRules() can create the RuleArgs parameter. This is particularly useful if you use code generation for your business classes, because standardization is critical when building code generation templates. The custom RuleArgs classes in CommonRules are a hybrid approach. I do implement custom classes, but they subclass DecoratedRuleArgs. This means that the code in AddBusinessRules() can use either the strongly typed custom class or DecoratedRuleArgs. Either approach works, so you can use StringMaxLength like this: ValidationRules.AddRule( _ Csla.Validation.CommonRules.StringMaxLength, _ New Csla.Validation.CommonRules.MaxLengthRuleArgs(NameProperty, 5)) or like this: Dim args = New Csla.Validation.DecoratedRuleArgs(NameProperty) args("MaxLength") = 5 ValidationRules.AddRule(Csla.Validation.CommonRules.StringMaxLength, args) You get the same end result. The first approach is better for hand-coding, because it is strongly typed. The second approach is better for code generation, because it is a standard approach that works with any rule method that accepts a DecoratedRuleArgs parameter. By implementing a custom subclass of DecoratedRuleArgs in CommonRules, I enable both scenarios.
QR Code ISO/IEC18004 Generator In Java
Using Barcode generator for Java Control to generate, create QR-Code image in Java applications.
www.OnBarcode.com
QR Code ISO/IEC18004 Printer In None
Using Barcode drawer for Font Control to generate, create QR-Code image in Font applications.
www.OnBarcode.com
UPC - 13 Encoder In Java
Using Barcode creation for Java Control to generate, create GS1 - 13 image in Java applications.
www.OnBarcode.com
Code39 Generation In Objective-C
Using Barcode maker for iPhone Control to generate, create Code 39 Extended image in iPhone applications.
www.OnBarcode.com
PDF-417 2d Barcode Generator In None
Using Barcode encoder for Online Control to generate, create PDF417 image in Online applications.
www.OnBarcode.com
UPC - 13 Creator In Java
Using Barcode creator for Android Control to generate, create EAN13 image in Android applications.
www.OnBarcode.com
Copyright © OnBarcode.com . All rights reserved.