gui app In Form$1($MISY $2313$ Project$)$

$-$ Change the title to $($MISY$2313-$Project$)$ and select appropriate icon.

$-$ Add PMU picture in a picture box control that covers most of the form except a narrow strip at the top.

$-$ Add MenuStrip control to the form.

$-$ Define a menu for the following items $($File$,$ Sale, Team, and Instructions$),$ where File has a submenu of $($New$,$ Open, and Select$)$ and Team has a submenu for the members of the group.

$-$ Add OpenFileDialog control.

$-$ File New is used to create new text file, Open is used to view and modify an existing file, and select is to select existing file to be used in Form$3.$

$-$ Following is a possible sample of Form$1$

Create Form$2($Manipulate Items$)$

$-$ Make its title as $($Manipulate Items$)$

$-$ Add a big scrollable multi$-$line textbox control.

$-$ Add OpenFileDialog and SaveFileDialog controls.

$-$ Add Save File button control.

$-$ Following is a possible sample of Form$2$

Create Form$3($Process Sale$)$

$-$ Make its title as $($Process Sale$)$

$-$ This form contains a label and textbox to enter an item ID$,$ another label and textbox to enter the quantity, a button to enter the Item details, a simple multiline textbox with labels or dataGridView control for better formatting, and lables to display the grand total.

$-$ Form$3$ also uses a combo box to display the names of several Saudi cities. Set the names of the cities in a combobox in the design mode. When the user selects a city from the combox, the city map is displayed. To give you a startup, I will guide you through the important steps of development.

Programming Form$1$ controls

$-$ Double click on File$>>$New submenu. Program it to create object for Form$2$ and show it$.$

$-$ Program File$>>$Open to create Form$2$ object, show its OpenFileDialog, read the contents of the selected file and display it in the textbox of Form$2,$ then show form$2.$ Be sure that both openFileDialog and textbox of Form$2$ modifiers set to Public to be able to access them from Form$1.$ The code needed her is:

Form$2$ f$2=$ new Form$2()$;

f$2.$openFileDialog$1.$ShowDialog$()$;

string content $=$ File.ReadAllText$($f$2.$openFileDialog$1.$FileName$)$;

f$2.$txtFileContents.Text $=$ content;

f$2.$Show$()$;

$-$ Program File$>>$Select to show its fileDialog. Store the file name selected in a global String variable $($I called it ItemsFile and initialized it to $).$ You make it global to be able to use it later from another method. Create Form$3$ object and populate the selected name file in a hidden labels $($named as lblFileUsed$).$

$-$ Program Sale menu using the following code:

Form$3$ f$3=$ new Form$3()$;

f$3.$lblFileUsed.Text $=$ ItemsFile;

if $($f$3.$lblFileUsed.Text $!="")$

f$3.$Show$()$;

else

MessageBox.Show$("$Please select a file through File$>$select"$)$;

$-$ Instructions menu item will simply show a message telling you how to use the application. However, you can create another form for the purpose if you wish.

Programming Form$2$ controls

Form$2$ has only one button to program. To help you in this, following is the code needed:

var saveFileDialog$1=$ new SaveFileDialog

$\{$

InitialDirectory $=$ Environment.GetFolderPath$($Environment$.$SpecialFolder.Personal$),$

Filter $=$ string.Format$("\{0\}$Text files $(*.$txt$)|*.$txt$|$All files $(*.*)|*.*",$ "ARG$0"),$

RestoreDirectory $=$ true,

ShowHelp $=$ true,

CheckFileExists $=$ false

$\}$;

if $($saveFileDialog$1.$ShowDialog$()==$ DialogResult.OK$)$

File.WriteAllText$($saveFileDialog$1.$FileName, txtFileContents.Text$)$;

this.Close$()$;

Programming Form$3$ controls

$1-$ Declare a global parallel arrays for $($itemId:string, description:string, price:double$).$ Set their sizes to a value higher than the possible number of items. I used $20.$

$2-$ Load the text file found in lblFileUsed $($selected through select submenu in Form$1)$ into the arrays when the form is loaded. Split the text by comas as in the following:

$111,$Cola,$1\mathrm{.}5$

$222,$Marker,$4\mathrm{.}5$

$333,$Glasses,$260$

$444,$Mouse,$25\mathrm{.}99$

$555,$Keyboard,$15$

$-----$

$-----$

Load the arrays with the values found in the selected file. See the following code:

try $\{$

TextReader tr $=$ File.OpenText$("$d:$...\backslash$Items$.$txt$")$;

string strLine $=$ string.Empty; $//$or use $=$;

string$[]$ arrColumns $=$ null;

while $(($strLine $=$ tr$.$ReadLine$())!=$ null$)$

$\{$

arrColumns $=$ strLine.Split$(\text{'},\text{'})$;$//$coma delimited

itemId$[$count$]=$ arrColumns$[0]$;

description$[$count$]=$ arrColumns$[1]$;

price $[$count$++]=.....$

$\}$

tr$.$Close$()$;

$\}$

catch

$\{$

MessageBox.Show$("$Cannot open the file"$)$;

$\}$

The above code should triggered from the form load method.

$3-$ Program the Enter Item button to add a line based on the entered itemId and the quantity. Subtotals and grand total are calculated.

$4-$ Program the cboCities $($contains few Saudi cities entered during the design phase$)$ to display the map of the selected city. Make cboCities Text property showing $$Select a City..$$

Use a code similar to the followi