Hey, I'm trying to make a foreach with two lists

But how do I do what, I tryed here, and I'm aware of this error:
en_flaske.PropertyFlaskeID == temp_flasker because temp_flasker are a list

private void button2_Click(object sender, EventArgs e)
{
    //makes temporary list
    List<string> temp_flasker = new List<string>();
    foreach (object i in checkedListBox12.CheckedItems) temp_flasker.Add(i.ToString());

    //makes a reservation
    Reservering ny = new Reservering((label12.Text), (dt));


    //The reservations are added to the "Flaske" which are "true" and where the ID match the ID from the temporary list
        foreach (Flaske en_flaske in Flaskeliste)

            if ((en_flaske._flaskeledig(dt)) == true && en_flaske.PropertyFlaskeID == temp_flasker/*here are the error*/);
            {
              en_flaske.Add(ny) ;

            }
}

temp_flasker is a List, and you are trying to compare it to what I assume is a string?

I assume you want to know if the list Contains the Flaske ID?

temp_flasker.Contains(en_flaske.PropertyFlaskeID) will return true if this is the case.

/- Sam Judson : Wrox Technical Editor -/

Hallo

I want to add a reservation to the right "flaske" in the Flaskelist

So there are two conditions which should be true, for me to add the "flaske"

1. It should be free

2. It shall be on the temp_list

But surely temp_flasker is a List, and could contain more than 1 'flaske'.

If it only contains 1 value then the above will still work however.

/- Sam Judson : Wrox Technical Editor -/

ok, so do you know how I can code it, so the code will work when I want to find en_flaske.PropertyFlaskeID which have the same ID as a string in the temp_flasker?

I got this error:
Error 4 Operator '==' cannot be applied to operands of type 'string' and 'System.Collections.Generic.List<string>'

Yes, I wrote it in my previous post.

/- Sam Judson : Wrox Technical Editor -/

ok, but the list contains more than one "flaske".. so do you know what I could I do instead?

If your 'checked list' contains more than 1 'flaske' then I don't know how you are meant to know which one to use.

/- Sam Judson : Wrox Technical Editor -/