StringNvlExpression

����StringNvlExpression

What it is

StringNvlExpression is used specify how to treat a NULL value in a String property (or field or variable). If the String appears to be NULL, it will be assigned a default value or a specified value.

• See LINQ for details about LINQ and the AI-Framework.
• Go to the category for all LINQ expressions.

Code example

public ReadOnlyStringProperty StringNvlExample
{
	get 
	{ 
		return CalculatedStringProperty(() => 
			Operation.EditItem.Name.Nvl()); 
	}
}

Explanation of the example

The example above works as follows.

• Line 1 defines a ReadOnlyStringProperty with the name StringNvlExample.
• In Line 5 and 6 the content of this property is going to be calculated and assigned.
• In line 6, the String Operation.EditItem.Number is evaluated, by adding .Nvl.
• If the String appears to be NULL, then StringNvlExample will be assigned the value after �Nvl between parentheses. When nothing is specified, the default value will be an empty string ""�.

Article ID: 342
Created: Thu, Dec 5, 2019
Last Updated: Mon, Jan 13, 2020

Online URL: https://wiki-ai-framework.abstract-it.nl/article/stringnvlexpression-342.html