ExtendedAttribute.ValueReadOnly

ExtendedAttribute.ValueReadOnly property

Gets a value indicating whether a value of this ExtendedAttribute instance is read-only. returns true if a formula or rollup is defined in the ExtendedAttributeDefinition for this object.

public bool ValueReadOnly { get; }

Examples

Shows how to add custom field which value is calculated using formula specified by the user.

var project = new Project();

// create new task extended attribute definition
var attribute = ExtendedAttributeDefinition.CreateTaskDefinition(CustomFieldType.Cost, ExtendedAttributeTask.Cost1, "Cost ratio");

// Add a formula to the attribute.
attribute.Formula = "[Cost] / [Actual Cost]";

project.ExtendedAttributes.Add(attribute);

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

// Create extended attribute
var extendedAttribute = attribute.CreateExtendedAttribute();
task.ExtendedAttributes.Add(extendedAttribute);

// We set the Formula for the extended attribute, so it is read only (the value is calculated using formula).
// Output is "Value is read only"
Console.WriteLine(extendedAttribute.ValueReadOnly ? "Value is read only" : "Value is not read only");

// You can try to set value of read only field, but it will not have effect.
extendedAttribute.NumericValue = -1000000M;

Console.WriteLine("Cost is {0}, Actual Cost is {1}, Custom attribute's value is {2}",
    task.Get(Tsk.Cost),
    task.Get(Tsk.ActualCost),
    extendedAttribute.IsErrorValue ? "#Error" : extendedAttribute.NumericValue.ToString());

task.Set(Tsk.Cost, 100m);
task.Set(Tsk.ActualCost, 120m);

Console.WriteLine("Cost is {0}, Actual Cost is {1}, Custom attribute's value is {2}",
    task.Get(Tsk.Cost), 
    task.Get(Tsk.ActualCost),
    extendedAttribute.IsErrorValue ? "#Error" : extendedAttribute.NumericValue.ToString());

ExtendedAttribute.ValueReadOnly

ExtendedAttribute.ValueReadOnly property

Examples

See Also