trouble with scope in C#

[daJunkCollector]

Hey,

My code is posted below. I am working on a small webform. I have tinkered around with the 'totalPrice' variable a few different ways now. Obviously, I am new to C#. As is, I receive the following error "An object reference is required for the nonstatic field, method, or property 'polo.totalPrice' " Polo.aspx is the name of the webform page.

To save you time: The error msg refers to line 67 of the below code. Furthermore, I believe that only the following lines should be under scrutiny: 17, 19, 67, 154, 155.

Thank you for your time.

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.OleDb;
 
using System.Collections.Generic;
 
public partial class polo : System.Web.UI.Page
{
    string totalPrice;
 
    static string calculatePrice(string quantity, string size)
    {
        const double avgSizePrice = 20.40;
        const double firstLrgSizePrice = 23.90;
        const double secondLrgSizePrice = 27.40;
        const double thirdLrgSizePrice = 30.90;
        string usersQuantity = quantity;
        string usersSize = size;
        double pricePerUnit = 0;
 
        switch (usersSize)
        {
            case "XS":
                pricePerUnit = avgSizePrice;
                break;
 
            case "S":
                pricePerUnit = avgSizePrice;
                break;
 
            case "M":
                pricePerUnit = avgSizePrice;
                break;
 
            case "L":
                pricePerUnit = avgSizePrice;
                break;
 
            case "XL":
                pricePerUnit = avgSizePrice;
                break;
 
            case "XXL":
                pricePerUnit = firstLrgSizePrice;
                break;
 
            case "3XL":
                pricePerUnit = secondLrgSizePrice;
                break;
 
            case "4XL":
                pricePerUnit = thirdLrgSizePrice;
                break;
        }
 
        double quantityTotal = double.Parse(usersQuantity);
        double basePrice = quantityTotal * pricePerUnit;
 
        totalPrice = basePrice.ToString("#######0.00");
    }
 
 
    public String nameVar
    {
        get{ return nameTextBox.Text; }
    }
    public String branchVar
    {
        get{ return branchDropdown.SelectedValue; }
    }
    public String productVar
    {
        get{ return productTextBox.Text; }
    }
    public String genderVar
    {
        get { return genderDropdown.SelectedValue; }
    }
    public String sizeVar
    {
        get { return sizeDropdown.SelectedValue; }
    }
    public String colorVar
    {
        get { return colorDropdown.SelectedValue; }
    }
    public String quanVar
    {
        get { return quanTextBox.Text; }
    }
 
    private Dictionary<string, ListItem[]> genderData;
 
    protected override void OnInit(EventArgs e)
    {
        base.OnInit(e);
 
        genderData = new Dictionary<string, ListItem[]>();
 
        genderData["Male"] = new ListItem[] {
            new ListItem("XS"),
            new ListItem("S"),
            new ListItem("M"),
            new ListItem("L"),
            new ListItem("XL"),
            new ListItem("XXL"),
            new ListItem("3XL"),
            new ListItem("4XL")
        };
 
        genderData["Female"] = new ListItem[] {
            new ListItem("XS"),
            new ListItem("S"),
            new ListItem("M"),
            new ListItem("L"),
            new ListItem("XL"),
            new ListItem("XXL"),
            new ListItem("3XL")
        };
    }
 
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            genderDropdown.Items.Add("--Please Select--");
            foreach (string gender in genderData.Keys)
            {
                genderDropdown.Items.Add(gender);
            }
 
            sizeDropdown.Items.Add("--Please Select--");
        }
    }
    protected void genderDropdown_SelectedIndexChanged(object sender, EventArgs e)
    {
        string gender = genderDropdown.SelectedValue;
 
        sizeDropdown.Items.Clear();
        sizeDropdown.Items.Add("--Please Select--");
        sizeDropdown.Items.AddRange(genderData[gender]);
    }
 
    protected void priceRefresh_Click(object sender, EventArgs e)
    {
        calculatePrice(quanTextBox.Text, sizeDropdown.SelectedValue);
        price.Text = totalPrice;
    }
    protected void submitBtn_Click(object sender, EventArgs e)
    {
        if (Page.IsValid == true)
        {
            Server.Transfer("Confirmation_Polo.aspx");
        }
 
    }
}

[daJunkCollector]

Holy Hannah! I figured it out.......

Line 19: public string calculatePrice(string quantity, string size)

after line 67 I added:

return totalPrice;





BOOOOYAKASHA!

[Dan Beanweed]

"totalprice" is declared a (by default) non-static string, but the only place in the code you posted where the value is assigned is inside a method declared to be static. I suggest a review of the concept of static fields (e.g. http://msdn2.microsoft.com/en-us/library/98f28cdx(VS.71).aspx) .

Your choice is to delcare totalprice static, the method non-static or create a instance of polo and then call that object's totalprice property.

[daJunkCollector]

Hrm...Thanks Dan. I will review that site you posted. Furthermore, I will try to make both the var and the method static and see if it still works. I believe I would prefer them static.

Thanks