CODEWITHSUNDEEP
c#winformschartsmschart
Mich
Mich

Reputation: 3594

How can I check in C# if a Chart's annotations contain an annotation with a specific name using Linq

The Annotations object in Chart in C# is derived from a Collection<>, but I cannot use .Any() or .Find() methods on it for some reason.

So this does not work:

using System.Windows.Forms.DataVisualization.Charting;

Chart chart = new Chart();

// Your annotation name to search for
string annotationNameToFind = "YourAnnotationName";

// Check if the annotation exists with the given name
bool annotationExists = chart.Annotations.Any(annotation => annotation.Name == annotationNameToFind);

It has a method .Contains(), but I cannot use Linq with it.

How do I check if the annotations in a chart contain a specific annotation by name with Linq or something similar without using a for or foreach loop

Upvotes: 1

Views: 134

Answers (1)

Ibram Reda
Ibram Reda

Reputation: 2820

Look at documentation there is FindByName Method.

Returns An Annotation object, or null if the object does not exist

var annotaion = chart.Annotations.FindByName(annotationNameToFind);
bool annotationExists = annotaion is not null;

Also, you can iterate over them With LINQ

bool annotationExists = chart.Annotations.GetEnumerator().Any(annotation => annotation.Name == annotationNameToFind);

Upvotes: 0

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