c# generate barcode Populating a ListBox Control with File Names in Font

Maker ANSI/AIM Code 39 in Font Populating a ListBox Control with File Names

Populating a ListBox Control with File Names
Code 3 Of 9 Creator In None
Using Barcode maker for Font Control to generate, create USS Code 39 image in Font applications.
www.OnBarcode.com
Making Code 39 Extended In None
Using Barcode drawer for Font Control to generate, create Code 3 of 9 image in Font applications.
www.OnBarcode.com
Populating ListBox1 with file names is roughly comparable to populating ComboBox1 with path names. However, there are several critical differences. One of these differences is the GetFiles method of the My.Computer.FileSystem object. The GetFiles method returns a read-only Collection object with the full path and file name for each file in a designated directory. Therefore, passing the selected path from ComboBox1 to the GetFiles method returns all the files from the selected path.
EAN13 Drawer In None
Using Barcode generation for Font Control to generate, create European Article Number 13 image in Font applications.
www.OnBarcode.com
Painting Barcode In None
Using Barcode drawer for Font Control to generate, create Barcode image in Font applications.
www.OnBarcode.com
CHAPTER 9 INTRODUCTION TO VISUAL BASIC EXPRESS AND WINDOWS FORMS
Data Matrix Encoder In None
Using Barcode creation for Font Control to generate, create DataMatrix image in Font applications.
www.OnBarcode.com
PDF417 Encoder In None
Using Barcode maker for Font Control to generate, create PDF-417 2d barcode image in Font applications.
www.OnBarcode.com
The next code listing shows the detailed syntax for populating ListBox1 with file names based on the selection of a path from ComboBox1. The code is from the ComboBox1_SelectedIndexChanged procedure, which fires whenever there is a programmatic or manual change to the index for the currently selected item. All the code within the procedure resides within an If...Then...Else statement. The condition for the If statement evaluates whether this is for an initial programmatic selection (initComboBox1 = True) or a manual programmatic selection (initComboBox1 = False). If the procedure runs because of a manual selection, the following actions take place: 1. The procedure clears the Items collection for ListBox1 to remove files from any prior manual selection. 2. Next, the procedure uses a For Each...Next loop to pass successively through the items of the Collection object returned by the GetFiles method of the My.Computer.FileSystem object. 3. The Add method for the Items collection of ListBox1 populates ListBox1 with file names. In order to show just file names without their full path, the procedure uses the Right method from the Microsoft.VisualBasic library. If initComboBox1 = True Then initComboBox1 = False Else Me.ListBox1.Items.Clear() For Each foundFile As String In _ My.Computer.FileSystem.GetFiles(Me.ComboBox1.SelectedItem) Me.ListBox1.Items.Add( _ Microsoft.VisualBasic.Right(foundFile, _ Len(foundFile) - Len(Me.ComboBox1.SelectedItem) - 1)) Next End If
Encoding EAN / UCC - 13 In None
Using Barcode encoder for Font Control to generate, create EAN 128 image in Font applications.
www.OnBarcode.com
GTIN - 12 Encoder In None
Using Barcode maker for Font Control to generate, create UPC-E image in Font applications.
www.OnBarcode.com
Reading a Text File Based on ComboBox and ListBox Selections
Code 3 Of 9 Reader In None
Using Barcode reader for Software Control to read, scan read, scan image in Software applications.
www.OnBarcode.com
Creating Code 39 In Objective-C
Using Barcode maker for iPad Control to generate, create Code39 image in iPad applications.
www.OnBarcode.com
The final task in the sample application is to show the text for a file that a user selects. While the user picks a file to show from ListBox1, that control only contains the names for files, not their full paths. Therefore, this part of the solution must use the currently selected items from both ComboBox1 and ListBox1. ComboBox1 contributes the name of the path, and ListBox1 contributes the name of the file. The process of showing a file is initiated by a user clicking an item in ListBox1 to select a file. Therefore, the code for this part of the solution resides in the ListBox1_SelectedIndexChanged procedure. The code from this procedure appears next. Again, the My.Computer.FileSystem object reduces and simplifies the amount of code needed to perform the task. In addition, the sample takes advantage of the Quick Console window, which is the default window for showing content written to the Console in VBE. Aside from a Dim statement, it takes just three lines of code to read a file based on the selections from the ComboBox and ListBox controls and display the results. The first line creates a full path and file name for the selected file with the help of the CombinePath method for the My.Computer.FileSystem object. The next line returns a String value with the contents of the selected file represented by the output generated in the first line (strPathFile). The ReadAllText method for the My.Computer.FileSystem object returns the contents of a file as a String variable (fileReader).
Barcode Creator In VB.NET
Using Barcode maker for Visual Studio .NET Control to generate, create Barcode image in VS .NET applications.
www.OnBarcode.com
Barcode Decoder In Java
Using Barcode Control SDK for Eclipse BIRT Control to generate, create, read, scan barcode image in BIRT applications.
www.OnBarcode.com
CHAPTER 9 INTRODUCTION TO VISUAL BASIC EXPRESS AND WINDOWS FORMS
UPCA Creation In Java
Using Barcode maker for Android Control to generate, create UPCA image in Android applications.
www.OnBarcode.com
Drawing Code 128 Code Set B In Objective-C
Using Barcode printer for iPad Control to generate, create Code128 image in iPad applications.
www.OnBarcode.com
The last line displays the contents of fileReader in the Quick Console window within VBE. The WriteLine method for the Console object directs its output to this window by default in VBE. If the Quick Console window is not open, VBE automatically opens the Quick Console window as it processes the Console.WriteLine statement. Dim fileReader As String, strPathFile As String strPathFile = My.Computer.FileSystem.CombinePath( _ Me.ComboBox1.SelectedItem, Me.ListBox1.SelectedItem) fileReader = My.Computer.FileSystem.ReadAllText(strPathFile) Console.WriteLine(fileReader)
UCC - 12 Generation In C#.NET
Using Barcode generator for Visual Studio .NET Control to generate, create UPC Code image in Visual Studio .NET applications.
www.OnBarcode.com
Drawing QR Code In .NET
Using Barcode encoder for Reporting Service Control to generate, create QR Code 2d barcode image in Reporting Service applications.
www.OnBarcode.com
Data Matrix Maker In Objective-C
Using Barcode generation for iPhone Control to generate, create Data Matrix image in iPhone applications.
www.OnBarcode.com
PDF417 Creator In Java
Using Barcode maker for BIRT reports Control to generate, create PDF417 image in Eclipse BIRT applications.
www.OnBarcode.com
Recognizing GS1 - 12 In None
Using Barcode decoder for Software Control to read, scan read, scan image in Software applications.
www.OnBarcode.com
Code 128 Code Set C Generator In VS .NET
Using Barcode creator for VS .NET Control to generate, create ANSI/AIM Code 128 image in VS .NET applications.
www.OnBarcode.com
Copyright © OnBarcode.com . All rights reserved.