Control Multiple Checkbox Arrays

Question

I have two arrays of 16 checkboxes that I want to have gradually checked when a for statement runs. It looks like this:

public void Cycle()
{
   if (host == false)
        {
            CheckBox[] cboxes = relayRow.CheckBoxes;
        }                
        else if (host == true)
        {
            CheckBox[] cboxes = relayRow2.CheckBoxes;
        }
   for (int i = 0; i < 16; i++)
        {            
            cboxes[i].Checked = true;
        }
}

I am getting a red line under the 'cboxes' in the for statement saying "The name 'cboxes' does not exist in the current context." If I only use one at a time, it works perfectly, so there shouldn't be a problem with my arrays. Working one at a time is as follows:

  public void Cycle()
    {            
        CheckBox[] cboxes = relayRow.CheckBoxes;

        for (int i = 0; i < 16; i++)
        {
            cboxes[i].Checked = true;
        }
    }

There should also be not problem with my boolean 'host' since I have used it in other places and it works as intended. I'm just trying to switch between which array of 16 will be checked. Thanks in advance.

D Stanley · Accepted Answer · 2016-07-19 19:31:40Z

2

You just need to declare the variable outside of the if statement:

public void Cycle()
{
    CheckBox[] cboxes = null;
    if (host == false)
    {
        cboxes = relayRow.CheckBoxes;
    }                
    else if (host == true)
    {
        cboxes = relayRow2.CheckBoxes;
    }
    for (int i = 0; i < 16; i++)
    {            
        cboxes[i].Checked = true;
    }
}

or just

public void Cycle()
{
    CheckBox[] cboxes = host ? relayRow2.CheckBoxes : relayRow.CheckBoxes;
    for (int i = 0; i < 16; i++)
    {            
         cboxes[i].Checked = true;
    }
}

answered Jul 19, 2016 at 19:31

D Stanley

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Comments

CodeAlchemist · Accepted Answer · 2016-07-19 19:47:59Z

0

Slight Variation to D Stanley's answer, not sure if you NEED to use arrays and a for loop which forces you to hard code the number of checkboxes but this shoud work as well:

  public void Cycle()
    {
        var cboxes = host ? relayRow2.CheckBoxes : relayRow.CheckBoxes;
        cboxes = (from checkBox in cboxes.ToList()
            select new CheckBox { Checked = true}).ToArray();
    }

P.S. I don't have enough reputation points to comment otherwise I would have just commented your answer D Stanley and upticked (sorry!)

answered Jul 19, 2016 at 19:47

CodeAlchemist

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