Question

I keep getting this error on the second prepopulated… Cannot implicity convert type string to System.Collections.Generic.IEnumerable and I am unsure of what I am doing wrong.

namespace HomeInventory2
{
    public partial class Form1 : Form
    {
        public Form1(string prepopulated)
        {
            InitializeComponent();
            IEnumerable<String> lines = prepopulated;
            textBoxAmount.Text = lines.ElementAtOrDefault(0);
            textBoxCategories.Text = lines.ElementAtOrDefault(1);
            textBoxProperties.Text = lines.ElementAtOrDefault(2);
            textBoxValue.Text = lines.ElementAtOrDefault(3);
        }

        private void label1_Click(object sender, EventArgs e)
        {

        }

        private void submitButton_Click(object sender, EventArgs e)
        {
            CreateInventory create = new CreateInventory();
            create.ItemAmount = textBoxAmount.Text;
            create.ItemCategory = textBoxCategories.Text;
            create.ItemProperties = textBoxValue.Text;
            create.ItemValue = textBoxValue.Text;

            InventoryMngr invtryMngr = new InventoryMngr();
            invtryMngr.Create(create);

        }
    }

Answer 1

You have your constructor taking a single string as a parameter:

public Form1(string prepopulated)

You then are trying to set this to an IEnumerable<string>:

IEnumerable<String> lines = prepopulated;

You need to, instead, pass in an IEnumerable<string>:

public Form1(IEnumerable<string> prepopulated)

If your prepopulated string is a string which can be parsed into multiple strings, you could do that instead. For example, if it’s “prepopulated” with a string with newline separations, you could instead do something like:

IEnumerable<String> lines = prepopulated.Split(new[] {'\n'}, StringSplitOptions.RemoveEmptyEntries); // Split into separate lines