大家好，我正在做的窗口表单应用程序是1.）将数据与文本文件连接起来，然后当用户从列表框中选择文本框中数量类型的项目时，它将计算成本。
2。）当用户单击确认btn后，用户订购的商品将存储在文本文件中并进行错误检查，检查用户订购的商品是否有空。
3。）我现在遇到的问题是他们需要使用摘要按钮，当单击它时它将在txtbox中显示用户订购的当前成本金额和项目金额，并以另一种形式显示用户订购的名称，数量项目 与3.）任何人有任何想法，请建议我解决这个问题，
这是我到目前为止完成的代码
public partial class Form1 : Form
{
//All public variables
double dblRetail;
int intchoice;
public static int intSaleCount = 0;
public double dblTotalCost = 0;
double dblCost;
public static int Stock;
public static int quantity;
public static int price;
public static int intQuantity;
public static int retailPrice;
public static int total;
int selectedItem;
public Form1()
{
InitializeComponent();
}
public struct Products
{
public string strCode;
public string strName;
public int intStock;
public double dblPrice;
public string strImage;
};
List<Products> lstProducts = new List<Products>();
private void TextBox1_TextChanged(object sender, EventArgs e)
{
}
private void ListBox1_SelectedIndexChanged(object sender, EventArgs e)
{
//To select items in listbox and output to Picturebox and textbox
selectedItem = listBox1.SelectedIndex;
if (listBox1.SelectedIndex == -1)
{
txtRetailPrice.Clear();
}
else
{
txtRetailPrice.Text = (lstProducts[selectedItem].dblPrice*1.5).ToString("c");
}
if(listBox1.SelectedIndex == -1)
{
pictureBox1.Image = null;
}
else
{
pictureBox1.Image = Image.FromFile(lstProducts[selectedItem].strImage);
}
}
private void Button1_Click(object sender, EventArgs e)
{
//Calculate item order
if (!int.TryParse(txt_quantity.Text, out quantity))
{
MessageBox.Show("This is not a number – please enter it again");
txt_quantity.Clear();
txt_quantity.Focus();
btn_confirm.Visible = false;
btn_cancel.Visible = false;
}
if (listBox1.SelectedIndex == -1)
{
MessageBox.Show("You not order - please select item you want");
txt_quantity.Clear();
txt_quantity.Focus();
btn_confirm.Visible = false;
btn_cancel.Visible = false;
}
if (quantity == 0)
{
MessageBox.Show("You didn't order – please enter it again");
txt_quantity.Clear();
txt_quantity.Focus();
btn_confirm.Visible = false;
btn_cancel.Visible = false;
}
else
{
txt_cost.Text = ((lstProducts[selectedItem].dblPrice * 1.5) * quantity).ToString("c");
btn_confirm.Visible = true;
btn_cancel.Visible = true;
}
}
private void PictureBox1_Click(object sender, EventArgs e)
{
}
private void Form1_Load(object sender, EventArgs e)
{
StreamReader inFile;
inFile = File.OpenText("products.txt");
string strRead;
while ((strRead = inFile.ReadLine()) != null)
{
Products PrdObj;
string[] strTempArr = new string[5];
strTempArr = strRead.Split(',');
PrdObj.strCode = strTempArr[0];
PrdObj.strName = strTempArr[1];
PrdObj.intStock = int.Parse(strTempArr[2]);
PrdObj.dblPrice = double.Parse(strTempArr[3]);
PrdObj.strImage = strTempArr[4];
lstProducts.Add(PrdObj);
}
foreach (Products PrdObj in lstProducts)
{
listBox1.Items.Add(PrdObj.strName);
txt_quantity.SelectAll();
txt_quantity.Focus();
btn_confirm.Visible = false;
btn_cancel.Visible = false;
txt_quantity.Text = "0";
this.pictureBox1.SizeMode = PictureBoxSizeMode.Zoom;
}
inFile.Close();
}
private void Btn_confirm_Click(object sender, EventArgs e)
{
//Store items order
Stock = lstProducts[selectedItem].intStock;
//Check availebale in stock
if (Stock < quantity)
{
MessageBox.Show("Item you ordered is not enough in stock " + "This item availeble with: " + lstProducts[selectedItem].intStock);
txt_quantity.Clear();
txt_cost.Clear();
txt_quantity.Focus();
btn_confirm.Visible = false;
btn_cancel.Visible = false;
}
else
{
//Edit stock in txt file
Products now = new Products();
now.strCode = lstProducts[selectedItem].strCode;
now.strName = lstProducts[selectedItem].strName;
now.intStock = lstProducts[selectedItem].intStock - quantity;
now.dblPrice = lstProducts[selectedItem].dblPrice;
now.strImage = lstProducts[selectedItem].strImage;
lstProducts.Add(now);
//
lstProducts.Remove(lstProducts[selectedItem]);
listBox1.Items.RemoveAt(selectedItem);
listBox1.Items.Add(now.strName);
//Return to origin
listBox1.ClearSelected();
txt_quantity.Clear();
txt_cost.Clear();
btn_confirm.Visible = false;
btn_cancel.Visible = false;
}
}
private void Btn_cancel_Click(object sender, EventArgs e)
{
txtRetailPrice.Clear();
txt_quantity.Clear();
txt_cost.Clear();
btn_confirm.Visible = false;
btn_cancel.Visible = false;
}
private void Btn_salesummary_Click(object sender, EventArgs e)
{
// Declare the new display form variable and create the form object
Form2 frm_show_data = new Form2();
// Display the form
frm_show_data.ShowDialog();
}
}
}