Get value of dynamically generated checkbox in form panel - windows application c#

Question

I am dynamically generating Checkboxes on button click which I am adding to a panel in TableLayoutPanel.

Panel panel1=new panel();
CheckBox box = new CheckBox();
box.Name = "cb_" + count;
box.AutoSize = true;
panel1.Controls.Add(box);
tableLayoutPanel1.Controls.Add(panel1);
count++;

I need to check if these checkboxes are checked on Save button click. But when i try to retrieve the Checkbox it returns null. (But if I add the checkbox directly to the form instead of TablelayoutPanel I am able to retrieve it.)

for (int i = 0; i >= count; i++)
{
    CheckBox cb =  this.Controls["cb_" + i] as CheckBox;// Returns Null
    if (cb.Checked)
    {
       //Add code
    }
}

How can I get the checbox state?

It is because this.Controls["cb_" + i] returns null or is not of type CheckBox. — Neijwiert
– Neijwiert, Commented Mar 2, 2016 at 9:35

Alex Suleap · Accepted Answer · 2016-03-02 09:36:19Z

1

You are looking in the form controls and not in the tableLayoutPanel1

change the code like this

for (int i = 0; i >= count; i++)
{
    CheckBox cb =  tableLayoutPanel1.Controls["cb_" + i] as CheckBox;
    if (cb.Checked)
        {
           //Add code
        }
}

answered Mar 2, 2016 at 9:36

Alex Suleap

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Comments

Pikoh · Accepted Answer · 2016-03-02 09:34:31Z

0

Change your loop to this:

foreach(Control c in panel1.Controls)
{
     CheckBox cb = c as CheckBox;
     if (cb!=null)
     {
          if (cb.Checked)
          {
               //Add code
          }
     }
}

answered Mar 2, 2016 at 9:34

Pikoh

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