How do I measure the line length of several elements?

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Hello, I try to programmatically measure the length of several lines that are not in the same layer at the same time. After that I want to write the individual distances in the form (there is no problem with that ...). Unfortunately, I don't know how to write a method that would measure individual lines for me.

What I have tried:

namespace ProAppModule1
{


internal class Delka: Button
{
   
    protected override void OnClick()
    {
        Form1 form = new Form1();       
        double length = new double();
        lenght = GeometryEngine.Instance.Length(Polyline);//here line measurement
        form.richTextBox1.Text = length.ToString();
        form.Show();
    }
}
}

I will be happy for any advice or help.

Thank you.

Posted 21-Jul-21 19:31pm

Member 15170612

Updated 21-Jul-21 19:59pm

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OriginalGriff · Answer 1 · 2021-07-21T19:43:00

Don't ask a question that way: make a list of your actual questions, describe what your problem is with each, and explain what you have tired to fix it.
Then post that as your question.
Quick Answers isn't a "discussion forum", it's here for "I got this problem" - "here's how to fix it" question / answer sessions.
We do have forums for discussions - loads of 'em - but you'd probably be better asking such question of the people who created it: GIS Mapping Software, Location Intelligence & Spatial Analytics | Esri[^] - they have a dedicated community forum which is probably a better fit for "general" questions about the basics than a "generic" software development website like this would be: Esri Community | GIS Professional Community[^]