Go through a checked listbox and check all items C#

Question

I need to loop through a checked listbox, and for each of the items in it, I need to check them (basically like a "select all" function).

Is there a basic example you could give me to help me out please?

Ricard

probably you need to explain more...where do these check boxes reside...in a grid? repeater? List?...please add more detail... – Tamatave

I agree with NiK .. there are many ways depending on location.. if it is on a webpage.. jQuery is the easiest way :D – Cystolith

Answer 1

Use SetSelected and interate through all the Items

// Loop through and set all to selected.
for (int x = 0; x < listBox1.Items.Count; x++)
{
   listBox1.SetSelected(x, true);
}

To check the items, use SetItemChecked

// Loop through and set all to checked.
for (int x = 0; x < listBox1.Items.Count; x++)
{
   listBox1.SetItemChecked(x, true);
}

Fiber

thank you very much, this work but only if the line is changed to: listBox1.SetItemChecked(x, true); as it is a checked listbox – Ricard

Answer 2

You can look through all the items as ListItems:

foreach (ListItem li in CheckBoxList1.Items)
{
    li.Selected = true;
}

Putamen

Anonymous added: (ListItem will require a reference to System.Web.UI.WebControls) – Wendalyn