How to make a CheckBox unselectable?

Question

I was wondering how you make a CheckBox unselectable in c#? I thought it would be something like SetSelectable (false) or something but I can\'t seem to see th

Answer 1

You can set AutoCheck property to false.

Answer 2

For disabling all the checkboxes in a CheckedListBox

for (int i = 0; i < checkedListBoxChecks.Items.Count; i++)
{
   checkedListBoxChecks.SetItemChecked(i, true);
   //checkedListBoxChecks.Enabled = false;
   this.checkedListBoxChecks.SetItemCheckState(i, CheckState.Indeterminate);                  
}


private void checkedListBoxChecks_ItemCheck(object sender, ItemCheckEventArgs e)
{
    if (e.CurrentValue == CheckState.Indeterminate)
    {
        e.NewValue = e.CurrentValue;
    }
}

Answer 3

In order to make a more read-only behavior:

• Disable highlight when the cursor is over the CheckBox
• Disable reacting (logically or visibly) to a mouse click
• Have tooltips enabled

We can inherit the CheckBox class (similar to Haris Hasan's answer but with some improvements):

public class ReadOnlyCheckBox : CheckBox
{
    [System.ComponentModel.Category("Behavior")]
    [System.ComponentModel.DefaultValue(false)]
    public bool ReadOnly { get; set; } = false;

    protected override void OnMouseEnter(EventArgs e)
    {
        // Disable highlight when the cursor is over the CheckBox
        if (!ReadOnly) base.OnMouseEnter(e);
    }

    protected override void OnMouseDown(MouseEventArgs e)
    {
        // Disable reacting (logically or visibly) to a mouse click
        if (!ReadOnly) base.OnMouseDown(e);
    }

    protected override void OnKeyDown(KeyEventArgs e)
    {
        // Suppress space key to disable checking/unchecking 
        if (!ReadOnly || e.KeyData != Keys.Space) base.OnKeyDown(e);
    }
}

Answer 4

This code worked for me:

public class CtrlCheckBoxReadOnly : System.Windows.Forms.CheckBox
{
    [Category("Appearance")]
    [Browsable(true), EditorBrowsable(EditorBrowsableState.Always)]
    public bool ReadOnly { get; set; }

    protected override void OnClick(EventArgs e)
    {
        if (!ReadOnly) base.OnClick(e);
    }
}