ExtendedAttributeDefinition Class

public class ExtendedAttributeDefinition

Public Class ExtendedAttributeDefinition

public ref class ExtendedAttributeDefinition

type ExtendedAttributeDefinition =  class end

public static void EvaluateChoose()
{
    var project = CreateTestProjectWithCustomField();

    // Set Formula
    project.ExtendedAttributes[0].Formula = "Choose(3, \"This is a\", \"right\", \"choice\")";

    // Print extended attribute value
    var task = project.RootTask.Children.GetById(1);
    Console.WriteLine(task.ExtendedAttributes[0].TextValue);
}

public static void EvaluateIsNumeric()
{
    string[] numericFormulas =
        {
            "IsNumeric('AAA')", @"IsNUmeric(1)", "IsNumeric(1<0)", "IsNumeric(\"1.1\")", "IsNumeric(Choose((2 + Sgn(2^-3)), 123, \"one two three\"))"
        };

    var project = CreateTestProjectWithCustomField();

    foreach (var numericFormula in numericFormulas)
    {
        // Set Formula
        project.ExtendedAttributes[0].Formula = numericFormula;

        // Print extended attribute value
        var task = project.RootTask.Children.GetById(1);
        Console.WriteLine(task.ExtendedAttributes[0].TextValue);
    }
}

public static void EvaluateSwitch()
{
    var project = CreateTestProjectWithCustomField();

    // Set Formula
    project.ExtendedAttributes[0].Formula = "Switch( 0 < 1, \"0 is lesser than 1\", 0 > 1, \"0 is greater than 1\")";

    // Print extended attribute value
    var task = project.RootTask.Children.GetById(1);
    Console.WriteLine(task.ExtendedAttributes[0].TextValue);
}

public static Project CreateTestProjectWithCustomField()
{
    var project = new Project();
    var definition = ExtendedAttributeDefinition.CreateTaskDefinition(CustomFieldType.Text, ExtendedAttributeTask.Text1, "Custom Field");
    project.ExtendedAttributes.Add(definition);

    var task = project.RootTask.Children.Add("Task");

    var attribute = definition.CreateExtendedAttribute();
    task.ExtendedAttributes.Add(attribute);
    return project;
}