Topic: Working with files.
Example-1: To delete a file.
Result: This example will do the similar thing: it will delete a file, but not a folder.
Example-2: To copy a file to a different location
Result: It will copy a file to the location “D:\\” and renames file as “test.txt”.
Example-3: Or you can use move method instead of copy method
Result: It will move a file to the location “D:\\” and renames file as “test1.txt”.
Example-4:
Result: you can see a path of selected file.
Example-5:
Result: you can see an extension of selected file.
Example-6:
Result: you will get a file name of a selected file with its extension.
Example-7:
Result: you will get a file name of a selected file without its extension.
Topic: Process class
It is possible not just to select, but to open a file.
Example-1:
Result: it will open a file which you will select.
Example-2:
Result: this will open a notepad.
Example-3:
Result: this will open comand prompt.
Example-4:
Result: this will show you a name of program on which you are working now.
Example-5:
Result: this will show you a name of programs which are active now.
Example-6:
Result: do not do this.
Lab assignment:
to develop a notepad application
It should have the following menus:
File:
New
Open
Save
Exit
Edit:
Undo
Redo
Copy
Paste
Cut
Select All
Date/Time
Format:
Font
Colour
Topic: DateTime
Example-1:
Result: it will show you today’s date.
Example-2:
Result: It is same like previous, but this includes time also.
Example-3:
Result will be “True”, because it is a leap year.
Exaample-4:
Result will be “29”, because there are 29 days in February 2012.
Topic:DateTimePicker
Example-1:
Result: whatever date user selects it will display that date.
Topic: Picture Box and Image Class
Example-1:
Result:
Example-2:
Result: this is same as previous example.
Example-3: if you know URL of a picture then you can do as below.
Example-4:
Result:
Topic: ColorDialog
Example-1:
Result:
Example-2:
Result:
Example-3:
Result:
Topic: FontDialog
Example-1:
Result:
Example-2:
Result:
Example-3:
Result:
Example-4:
Result:
Example-5: in order to write a text in selected color we need to add one more method as given below:
Result:
Topic: Timer
Example-1:
Result: You will get infinite messages.
Example-2: in order to stop those messages we use stop method.
Result: you will get one Hello message after one second of delay.
Example-3:
Result:
Topic: SoundPlayer.
To play wav sounds we have to call library as “using System.Media;”.
Example-1:
Result: It will play your selected wav sound file.
Example-2: alternate way to play a wav sound file.
Example-3:
Result: this will play a selected sound file continuously.
Example-4:
Result: this will play system’s sound.
Topic: Masked Text Box