How to fill ComboBox with Text File
Fill a ComboBox quickly by importing data from a Text File
Text files are the simplest way to store data. It requires minimum knowledge to use them. Knowing how to read them make it possible to help you fill data in a control like in a ComboBox. Here is a very simple example. It uses an OpenFileDialog to get a Text File the user is requesting. The program validates the file and if everything is fair, it loads each line and put them in the ComboBox1. When the cursor reaches the end of the file, the property EndOfStream will be true. This will make your program quit the loop and safely close the function. Remember to close the Stream File after you finish.
SQL Server Developer Edition 2012
and Microsoft Visual Studio Pro 2012
are very cheap on Amazon ! Free Delivery. Check here: Private Sub Button3_Click(sender As System.Object, e As System.EventArgs) Handles Button3.Click Dim oStream As IO.StreamReader Dim oOpenFileDialog As OpenFileDialog oOpenFileDialog = New OpenFileDialog oOpenFileDialog.SupportMultiDottedExtensions = False If oOpenFileDialog.ShowDialog = Windows.Forms.DialogResult.OK Then If IO.File.Exists(oOpenFileDialog.FileName) Then oStream = New IO.StreamReader(oOpenFileDialog.FileName) 'Read all lines and add them into the ComboBox1 Do Until oStream.EndOfStream = True ComboBox1.Items.Add(oStream.ReadLine) Loop oStream.Close() 'very important to close the file End If End If End Sub |
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