How I can create a loop for all items from a CheckedListBox?

Question

I have a complex problem and all I find don't help me. So I have a WindowsFormApp and in Form2 I have a CheckedListBox who is like this :

|_|Simulink
|_|Aerospace Blockset
|_|Bioinformatics

and many others rows.

private void checkedListBox1_SelectedIndexChanged(object sender, EventArgs e)
{
}

I want, when I check one of this checkBoxes to get the name: Simulink , for exemple, if Simulink is checked or Aer... and verify in a text file instaler.ini who is here :

string installerfilename = Path + "installer.ini";
var link = (Path + "installer.ini").ToString();
var lines = File.ReadAllLines(link);

where I have that name: Simulink after #product= , like this : #product=Simulink and there delete # , and add a # where I have product=all => #product=all (this is for all cases ). You can help me to create a loop for all checkboxes , because all I tried was to make an event for checkboxes but is to complicated, and in that mode I have a lot of code ?

Answer 1

Use Regex.Replace and string.replace to update your product text files.

    private void chklbproduct_SelectedIndexChanged(object sender, EventArgs e)
    {
        string installerfilename = string.Format("{0}{1}", AppDomain.CurrentDomain.BaseDirectory, "Installer.txt");
        IEnumerable<string> inilines = File.ReadAllLines(installerfilename).AsEnumerable();

        string selectedItem = chklbproduct.SelectedItem.ToString();
        bool IsChecked = chklbproduct.CheckedItems.Contains(selectedItem);

        if (IsChecked)
            inilines = inilines.Select(line => line == string.Format("#product={0}", selectedItem) 
                                               ? line.Replace(line, string.Format("#product={0}", selectedItem), string.Format(@"product={0}", selectedItem))
                                               : line);

        else
            inilines = inilines.Select(line => (line == string.Format("#product={0}", selectedItem) || line == string.Format(@"product={0}", selectedItem)) 
                                               ? line.Replace(line, string.Format(@".*product={0}", selectedItem), string.Format(@"#product={0}", selectedItem)) 
                                               : line);


        if (chklbproduct.CheckedItems.Count == 0)
            inilines = inilines.Select(line => Regex.Replace(line, @".*product=all", @"product=all"));
        else
            inilines = inilines.Select(line => Regex.Replace(line, @".*product=all", @"#product=all"));


        string strWrite = string.Join(Environment.NewLine, inilines.ToArray());
        File.WriteAllText(installerfilename, strWrite);

    }

Answer 2

Assign each checkBox a name by clicking on it in the designer and then filling in the name property in the properties pane. You can now easily reference the checkboxes in code behind

Now in code behind you can create a list from all checkboxes yourself. Be sure to do this after calling the InitializeComponent method in the constructor.

public class MyForm
{
    List<CheckBox> checkboxes;

    public MyForm()
    {
        // Call InitializeComponent first
        // or all the checkboxes will be null
        InitializeComponent();

        checkboxes = new List<CheckBox>();
        checkboxes.add(myCheckBox1);
        checkboxes.add(myCheckBox2); 
        // etc...
    }
}

You can now loop over your checkboxes and perform the necessary actions, for example when a button is clicked:

public void Button1_Clicked(...)
{

    // Loop over all checkboxes that are checked
    foreach(var checkbox in checkboxes.Where(x => x.Checked))
    {
        switch(checkbox.Name)
        {
            case "myCheckBox1":
                // MyCheckBox1 is checked, do something
                break;

            case "myCheckBox2":
               // MyCheckBox2 is checked, do something
               break;
        }
    }
}