MCC - CIS162AD

MCC - CIS162AD
CS11 File Processing - 15 points

Modify CS10 Loops and Printing to load and save the changes to the catalog name combo box to a data file.
Create a new folder (CS11) and copy all of the contents in the CS10 folder to the new folder. Rename the form and project files inside of Visual Studio. Renaming the files from Windows, will cause the project not to open. It is OK to leave the namespace as CS10.
Use a combo box with the DropDownStyle set to DropDown for the catalog names.
Allow users to add catalog names, remove catalog names, clear the catalog list, display a count of the number of catalogs, print preview and print the catalog list.
In addition, include an option to allow the user to Save the Catalogs stored in the combo box back to the file.:
```
         File              Edit                     Help  
           Print Preview     Add Catalog               About
           Print Catalogs    Remove Catalog
           Save Catalogs     Clear Catalog List
           Exit              Display Catalog Count       
```
Create the data file (catalogs.txt) using Notepad and enter the following catalog names on separate lines:
```
Odds and Ends
Solutions
Camping Needs
ToolTime
Spiegel
The Outlet
The Large Size      
```
The file should be saved in the project's Debug folder which is inside the bin folder.
Folder path: CS11 > bin > Debug
Delete the entries in the Items.Collection list of the ComboBox.
Hint: Can cut from Items.Collection and Paste into data file catalogs.txt.
At the top of program before the statement that declares the namespace, add using System.IO; because this is where the FileStream, StreamReader, and StreamWriter are defined.

using System.IO;

namespace CS11
{
public partial class CS11Form : Form
{
Double click on the form to create the form load event, and use it to load the catalog list from the data file (catalog.txt).
If the file does not exist, display a message asking the user if they want to create the file.
Exit the program if the user does not want to create a new file.
In the method to handle the menu Save click event, add the code to save the changes to the file.
Create and code the method that will handle the form closing event.
Use the example (CS11ex) and review pages 302-303 to see the parameters that must be included.
In the form closing event check if there are any unsaved changes. If so, ask the user if they want to save the changes. If the user selects Yes, call the save file method. If the user selects Cancel, cancel the closing event and return them to the form.
After writing the method to handle the FormClosing event, its needs to be assigned as the form's FormClosing event handler by doing the following:
- Switch to Design View
- Click on the form one time to select it.
- In the Properties panel there are some buttons to contol how and what is displayed.
- Switch to the Events view by clicking on the "lighting" - 4th button.
- Scroll to the FormClosing event and in the drop-down list box select the method name (CS11Form_FormClosing).
- Switch back to Properties view by clicking on the 3rd button.
In the method to handle the menu Exit click event, just call this.Close() to trigger the form closing event.
A Boolean variable will need to be added at the class-level (cblnIsDataSaved). The flag should be initialized to true and set to false when a catalog is Added, Removed, or Cleared. It should only be set to false if the action is actually performed, so the command needs to be inside the if statement. For example, the Add is only completed if the description is not blank. The flag should be reset to true in the Save method.
Submit CS11Form.cs, CS11Form.Designer.cs, catalogs.txt

Adopted from Programming in C#.Net, by Bradley and Millspaugh, 2004
Revised: 11/17/2009 - www.mc.maricopa.edu/~marquez/cis162ad/cs11_file_processing.html