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How to use string.join in method

Scarlett72
Scarlett72 asked
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Last Modified: 2014-11-13
I'm trying to create a method that returns a comma separated list of all Calendar controls on a page, the solutions I've read have suggested using string.join; however, I an confused on how to implement this.  Could this also be an alternative solution?

protected String GetAllCalControls()
    {
        StringBuilder countCal = new StringBuilder();            
        foreach (Control ctrl in Page.Controls)
        {
            foreach (Control childc in ctrl.Controls)
            {
                if (childc is Calendar)
                {
                    countCal.Append(childc.ID+",");
                }
            }
        }
        countCal.Remove(countCal.Length, -1);
        return countCal.ToString();
    }

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it_saigeDeveloper
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Distinguished Expert 2019

Commented:
You might be looking for something like:
private string GetAllControls()
{
	return string.Join(",", (from Control control in Controls where control is Calendar select (control as Calendar).ID).ToArray());
}

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Make sure you add using System.Linq if it is not already there.

-saige-
Developer
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Commented:
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Commented:
Thank you it_saige, this is fantastic.  I really need to play with it some more and read up on the concepts you've used to fully understand your solution.

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