ExtendedAttributeCollection.IndexOf

ExtendedAttributeCollection.IndexOf method

Determines the index of the specified item in this collection.

public int IndexOf(ExtendedAttribute item)
ParameterTypeDescription
itemExtendedAttributethe specified item to locate in this collection.

Return Value

the index of the specified item if found; otherwise, -1.

Examples

Shows how to use extended attribute collections.

var project = new Project(DataDir + "ReadTaskExtendedAttributes.mpp");

// Get zero index task
var task = project.RootTask.Children.GetById(1);

if (!task.ExtendedAttributes.IsReadOnly && task.ExtendedAttributes.Count > 0)
{
    // clear extended attributes
    task.ExtendedAttributes.Clear();
}

// create extended attribute definition for a task
var taskDefinition1 = ExtendedAttributeDefinition.CreateTaskDefinition(CustomFieldType.Start, ExtendedAttributeTask.Start7, "Start 7");
var taskDefinition2 = ExtendedAttributeDefinition.CreateTaskDefinition(CustomFieldType.Finish, ExtendedAttributeTask.Finish7, "Finish 7");
project.ExtendedAttributes.Add(taskDefinition1);
project.ExtendedAttributes.Add(taskDefinition2);

Console.WriteLine("Iterate over task extended attributes of " + task.Get(Tsk.Name) + " task: ");
foreach (var attribute in task.ExtendedAttributes)
{
    Console.WriteLine("Attribute FieldId: " + attribute.FieldId);
    Console.WriteLine("Attribute Value: " + attribute.DateValue);
    Console.WriteLine();
}

// Add extended attribute 1
var extendedAttribute1 = taskDefinition1.CreateExtendedAttribute();
extendedAttribute1.DateValue = new DateTime(2020, 4, 14, 8, 0, 0);
if (task.ExtendedAttributes.IndexOf(extendedAttribute1) < 0)
{
    task.ExtendedAttributes.Insert(0, extendedAttribute1);
}

// Add extended attribute 2
var extendedAttribute2 = taskDefinition2.CreateExtendedAttribute();
extendedAttribute2.DateValue = new DateTime(2020, 4, 14, 17, 0, 0);
task.ExtendedAttributes.Add(extendedAttribute2);

// work with extended attributes...

// remove extended attribute by index
task.ExtendedAttributes.RemoveAt(0);

Console.WriteLine("Count of task's extended attributes: " + task.ExtendedAttributes.Count);

// use collection index access
Console.WriteLine("Attribute 1 Value: " + task.ExtendedAttributes[0].DateValue);

var otherProject = new Project();
var otherTask = otherProject.RootTask.Children.Add("Other task");

// copy attributes to other project
var attributes = new ExtendedAttribute[task.ExtendedAttributes.Count];
task.ExtendedAttributes.CopyTo(attributes, 0);

foreach (var attribute in attributes)
{
    otherTask.ExtendedAttributes.Add(attribute);
}

Console.WriteLine();
Console.WriteLine("Iterate over other task's extended attributes: ");
foreach (var attribute in otherTask.ExtendedAttributes)
{
    Console.WriteLine("Other attribute FieldId: " + attribute.FieldId);
    Console.WriteLine("Other attribute Value: " + attribute.DateValue);
    Console.WriteLine();
}

if (task.ExtendedAttributes.Contains(extendedAttribute2))
{
    task.ExtendedAttributes.Remove(extendedAttribute2);
}

// remove all extended attribute definitions
while (otherTask.ExtendedAttributes.Count > 0)
{
    otherTask.ExtendedAttributes.Remove(otherTask.ExtendedAttributes[0]);
}

See Also

ExtendedAttributeCollection.GetEnumerator ExtendedAttributeCollection.Insert