C#•9mo ago

Inventory Maintence Project Issue

I have two forms, one that lets you enter data for a new item. Once you hit Save, it should create a new InvItem object and add it to a list of inventory items and display it in the list. I can't seem to figure out how to get it to add the item. Any suggestions?

13 Replies

Angius•9mo ago

someListOfItems.Add(newItem)

u41c•9mo ago

There's a helper class called InvItemDB.cs and I'm somehow supposed to use a method from it to add the item and save it.

u41c•9mo ago

https://pastebin.com/k533HUCx

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u41c•9mo ago

Here's the new item form

using System;
using System.Windows.Forms;

namespace InventoryMaintenance
{
    public partial class frmNewItem : Form
    {
        public frmNewItem()
        {
            InitializeComponent();
        }

        InvItem invItem = null;

        public InvItem GetNewItem()
        {
            if (IsValidData())
            {
                int newItemNumber = int.Parse(txtItemNo.Text);
                string newDescription = txtDescription.Text;
                decimal newPrice = decimal.Parse(txtPrice.Text);

                return new InvItem(newItemNumber, newDescription, newPrice);
            }

            return null;
        }

        private bool IsValidData()
        {
            return Validator.IsPresent(txtItemNo) &&
                   Validator.IsInt32(txtItemNo) &&
                   Validator.IsPresent(txtDescription) &&
                   Validator.IsPresent(txtPrice) &&
                   Validator.IsDecimal(txtPrice);
        }

        private void btnSave_Click(object sender, EventArgs e)
        {
            if (IsValidData())
            {
                invItem = GetNewItem();
                InvItemDB.GetItems();
                this.Close();
            }
        }

        private void btnCancel_Click(object sender, EventArgs e)
        {
            this.Close();
        }
    }
}

using System;
using System.Windows.Forms;

namespace InventoryMaintenance
{
    public partial class frmNewItem : Form
    {
        public frmNewItem()
        {
            InitializeComponent();
        }

        InvItem invItem = null;

        public InvItem GetNewItem()
        {
            if (IsValidData())
            {
                int newItemNumber = int.Parse(txtItemNo.Text);
                string newDescription = txtDescription.Text;
                decimal newPrice = decimal.Parse(txtPrice.Text);

                return new InvItem(newItemNumber, newDescription, newPrice);
            }

            return null;
        }

        private bool IsValidData()
        {
            return Validator.IsPresent(txtItemNo) &&
                   Validator.IsInt32(txtItemNo) &&
                   Validator.IsPresent(txtDescription) &&
                   Validator.IsPresent(txtPrice) &&
                   Validator.IsDecimal(txtPrice);
        }

        private void btnSave_Click(object sender, EventArgs e)
        {
            if (IsValidData())
            {
                invItem = GetNewItem();
                InvItemDB.GetItems();
                this.Close();
            }
        }

        private void btnCancel_Click(object sender, EventArgs e)
        {
            this.Close();
        }
    }
}

u41c•9mo ago

Angius•9mo ago

That helper class lets you save a list of items to a file, yes

u41c•9mo ago

Angius•9mo ago

So you need to read items from that file, add the new item, then save items to that file again

u41c•9mo ago

Yeah but the list isn't updating once I save and load the items back.

Angius•9mo ago

On btnSave click you get the items from file I don't see you saving them

u41c•9mo ago

I've taken a long break from coding and this is very frustrating that I can't figure this out

        private void btnAdd_Click(object sender, EventArgs e)
        {
            // Add code here that creates an instance of the New Item form
            // and then gets a new item from that form.
            // Create an instance of the frmNewItem form
            frmNewItem newItemForm = new frmNewItem();

            DialogResult result = newItemForm.ShowDialog();

            if (result == DialogResult.OK)
            {
                InvItem newItem = newItemForm.GetNewItem();

                if (newItem != null)
                {
                    newItemForm.Close();
                    FillItemListBox();
                    lstItems.Items.Add(newItem);
                }
            }
            else
            {
            }

            newItemForm.Dispose();
        }

        private void btnAdd_Click(object sender, EventArgs e)
        {
            // Add code here that creates an instance of the New Item form
            // and then gets a new item from that form.
            // Create an instance of the frmNewItem form
            frmNewItem newItemForm = new frmNewItem();

            DialogResult result = newItemForm.ShowDialog();

            if (result == DialogResult.OK)
            {
                InvItem newItem = newItemForm.GetNewItem();

                if (newItem != null)
                {
                    newItemForm.Close();
                    FillItemListBox();
                    lstItems.Items.Add(newItem);
                }
            }
            else
            {
            }

            newItemForm.Dispose();
        }

FillItemListBox(); should do it, right?

Angius•9mo ago

Where do you call InvItemDB.SaveItems(items)? Because that is what saves items to a file

u41c•9mo ago

🤦‍♂️ oh lemme try that

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Inventory Maintence Project Issue