Vb sample files

The program will also show the input box repeatedly so that the user can enter data continuously until he or she enters the word "finish". The program also introduces the error handler to handle errors while reading the file or deleting the file because the program cannot read or delete the file when the file has not been created.

The syntax for error handler is On Error Goto Label where the label is an error handling sub procedure. Download Microsoft Edge More info. Contents Exit focus mode. Is this page helpful? Please rate your experience Yes No. Any additional feedback?

Submit and view feedback for This product This page. OK Then ' Do something. When you execute this program, you will get a Windows Forms window with a Button on it.

You can click the button and an OpenFileDialog, similar to the screenshot at the top, will appear. Read file. Next, we read a file the user selects in the OpenFileDialog. We detect the DialogResult. OK value—this occurs when the OK button is pressed. The FileMode enumerator defines various methods for opening files. The preceding example provides simple file operations in VB. However, to utilize the immense powers of System.

IO classes, you need to know the commonly used properties and methods of these classes. We will discuss these classes and the operations they perform in the following sections. Reading from and Writing into Text files. It involves reading from and writing into text files. The StreamReader and StreamWriter classes help to accomplish it. Reading from and Writing into Binary files. It involves reading from and writing into binary files.