Page 135 - DCAP408_WEB_PROGRAMMING

Unit 8: File I/O

Self Assessment Notes

Fill in the blanks:
1. fopen opens a file and associates a ………………… with it.
2. Path is a string specifying the name of the file, while ………………….. is a string indicating
how the file is to be opened.
3. fscanf is the analogue of scanf for use with ……………………. streams.
4. ………………………… option is provided as a simple method for loading any file into the
buffer.
5. Load sequential hex string option allows you to load a sequential string of hex characters
into the……………………..

8.2 Creating File Selection Dialog Box

In this section, we’ll write code so that your menu items actually do something other than
displaying message boxes. In other words, the Edit > Cut menu will really cut text, and the Edit
> Paste menu will really paste text.
So open up the project you completed for the previous section. Comment out or delete any
message box code.
We’ll start with the File > Open menu.

The Open File Dialogue Box

In most programmes, if you click the File menu, and select the Open item, a dialogue box is
displayed. From the dialogue box, you can click on a file to select it, then click the Open button.
The file you clicked on is then opened up. We’ll see how to do that from our menu.

!
Caution Except, the file won’t open yet - only the dialogue box will display, and then name
of the chosen file.
First, place two textboxes on your form. In the properties box, locate the MultiLine property.
Type some default text for the Text Property of textbox1. Change the Font size to 14 points.
Your form should now look something like this one:

LOVELY PROFESSIONAL UNIVERSITY 129