help

[nero29]

So you say you are a Newbie and you managed to create that application
anyways let me write you a better explanation after i come from work,if that is ok with you

by the way post the code / the place only where its not working ,a line or 2 above and line or 2 below the error causing statement.[Dont post the whole code ]

hahaha i mean i am just a first year IT student
so i am not that good hahaha anyways could you tell me how to put the price in my items cause i dont know how they will automatically appear if i choose the items in the artist combobox my prof told me to use geters and setters but everytime i use this code
:
get { return value; }
set
{
if (value == 0)
{
price = 0;
}
else
{
price = value;
}
}


i get an error like ;expected thing

[abdul.gafur]

Please visit this tutorial to see how to create setter and getter Ted Kolovos - Amazing ASP.NET Class properties - accessor Methods - getters and setters

if (value == 0) {
   price = 0;
}
else {
   price = value;
}

//why don't you just make like this :
price = value;

// Although value==0, but price = 0 or price = value;

Weird algorithm

[gokuajmes]

the way Set , Get Accessors work are like the code below

private string _myname;
public string myName
{
 get {return _myname ; }
 set { _myname = value ;}
}

the highlighted code in red ,that's missing in your code.

WorkFlow :

1.Add a combobox in your Windows form by double clicking it in toolbox or drag and drop it.

2.Add items to the combobox using the Gui , Items.Add ( ) method or better the Items.AddRange ( ) method of the ComboBox class.

3.Now double click the combobox to go into the code ,automatically a event is created for the 'Selected Index changed '

4.In that this is what you have to do

myPriceTextBox.Text = ComboBox1.SelectedIndex.Value.ToString() ;
or
myPriceTextBox.Text = ComboBox1.SelectedValue.ToString();
//always make sure that selected index is "not out of range " ie..  [ ! = -1]

[nero29]

@jokujames thank you @abdul thank you
could someone telll me how to use isort, icomparable and iequitable???

[gokuajmes]

ooh by the way that's not jokujames but Gokujames
i am sure i have seen the Icomparable as a Interface ,but ISort & IEquitable . Anyway have a look at what IComparable interface is

[nero29]

sorry bout that gokujames haha **** i need to include the Icomparable to my windows app

[nero29]

my bad it was Iequatable not equitable lol please someone help me

[gokuajmes]

I don't want to give you the solution but here take this and move along from here,,

IEquatable(T) Interface (System)

How to use the IComparable and IComparer interfaces in Visual C#

Learn Interfaces ,as they are key to making good programs

[nero29]

bro could you tell me wats wrong with my code how come when i delete the item on the list box the price doesnt subract correctly from the total amount

int index = listBox1.SelectedIndex;
int i = -1;

listBox1.Items.RemoveAt(index);
totalAmount = totalAmount -= priceTab[i];
textBox6.Text = string.Format("{0:#.##}", totalAmount);

[gokuajmes]

I guess this is what you are trying to do ;

// you have a button that Invokes the event to decrease the Price.So under the Button click event write the code

//Decrease the current deleted products Price from the textbox that has the total price and then update the value

//get the value of the price from the ListBox
string priceToDelete = ListBox1.SelectedItem.Value ;

//get the Total price from the TextBox
string total = txtTotalPrice.Text ;

//deduct the product ammount and then update
total -= priceToDelete;
txtTotalPrice.Text = total;

in short this the code that you all need to write ,in a straight forward manner.

txtTotalPrice.Text -= ListBox1.SelectedValue;