print barcode vb.net LIST CONTROLS in C#.NET

Draw Data Matrix ECC200 in C#.NET LIST CONTROLS

LIST CONTROLS
Drawing ECC200 In C#.NET
Using Barcode printer for VS .NET Control to generate, create DataMatrix image in Visual Studio .NET applications.
www.OnBarcode.com
Recognizing ECC200 In Visual C#.NET
Using Barcode decoder for Visual Studio .NET Control to read, scan read, scan image in VS .NET applications.
www.OnBarcode.com
CREATE THE CONTROLS FOR OUR NEW APPLICATION (continued) Action 8 Set the properties for the MainForm form.
Drawing Code 128 Code Set C In Visual C#.NET
Using Barcode drawer for .NET Control to generate, create Code 128 Code Set B image in VS .NET applications.
www.OnBarcode.com
Draw QR Code In C#.NET
Using Barcode maker for VS .NET Control to generate, create QR Code image in Visual Studio .NET applications.
www.OnBarcode.com
Settings Property AcceptButton Size Text Value btnClose 400, 300 MyAlbumEditor
Barcode Encoder In C#.NET
Using Barcode creation for VS .NET Control to generate, create Barcode image in .NET framework applications.
www.OnBarcode.com
USS-128 Generator In C#
Using Barcode generator for .NET framework Control to generate, create GS1-128 image in VS .NET applications.
www.OnBarcode.com
Result
Universal Product Code Version A Generator In Visual C#.NET
Using Barcode generation for VS .NET Control to generate, create GTIN - 12 image in VS .NET applications.
www.OnBarcode.com
Encode USPS Confirm Service Barcode In Visual C#
Using Barcode creation for .NET Control to generate, create USPS Confirm Service Barcode image in .NET framework applications.
www.OnBarcode.com
Note: When you enter the new Size setting, note how the controls automatically resize within the form based on the assigned Anchor settings.
Creating Data Matrix In Java
Using Barcode encoder for Java Control to generate, create Data Matrix ECC200 image in Java applications.
www.OnBarcode.com
DataMatrix Printer In None
Using Barcode maker for Online Control to generate, create Data Matrix 2d barcode image in Online applications.
www.OnBarcode.com
Our form is now ready. You can compile and run if you like. Before we talk about this in any detail, we will add some code to make our new ListBox display the photographs in an album. Some of the new code added by the following steps mimics code we provided for our MyPhotos application. This is to be expected, since both interfaces operate on photo album collections.
Make Code 3/9 In Java
Using Barcode encoder for Android Control to generate, create Code 3/9 image in Android applications.
www.OnBarcode.com
EAN / UCC - 13 Printer In None
Using Barcode encoder for Excel Control to generate, create European Article Number 13 image in Excel applications.
www.OnBarcode.com
DISPLAY THE CONTENTS OF AN ALBUM IN THE LISTBOX CONTROL Action 9 In the MainForm.cs file, indicate we are using the Manning.MyPhotoAlbum namespace. Add some member variables to track the current album and whether it has changed. Override the OnLoad method to initialize the album. Note: The OnLoad method is called a single time after the form has been created and before the form is initially displayed. This method is a good place to perform one-time initialization for a form. 12 Add a Click handler for the Close button to exit the application. Result
2D Generation In VB.NET
Using Barcode creation for VS .NET Control to generate, create Matrix image in .NET applications.
www.OnBarcode.com
Reading Barcode In Visual Studio .NET
Using Barcode reader for .NET Control to read, scan read, scan image in VS .NET applications.
www.OnBarcode.com
. . . using Manning.MyPhotoAlbum;
DataMatrix Reader In .NET Framework
Using Barcode reader for .NET Control to read, scan read, scan image in .NET framework applications.
www.OnBarcode.com
Scan PDF417 In Java
Using Barcode reader for Java Control to read, scan read, scan image in Java applications.
www.OnBarcode.com
private PhotoAlbum _album; private bool _bAlbumChanged = false;
Encoding UPC-A Supplement 2 In None
Using Barcode creation for Microsoft Word Control to generate, create UPCA image in Office Word applications.
www.OnBarcode.com
Data Matrix 2d Barcode Printer In VS .NET
Using Barcode printer for Reporting Service Control to generate, create ECC200 image in Reporting Service applications.
www.OnBarcode.com
protected override void OnLoad (EventArgs e) { // Initialize the album _album = new PhotoAlbum(); base.OnLoad(e); }
Make Barcode In Java
Using Barcode drawer for BIRT reports Control to generate, create Barcode image in BIRT reports applications.
www.OnBarcode.com
USS Code 39 Generation In None
Using Barcode printer for Online Control to generate, create Code39 image in Online applications.
www.OnBarcode.com
private void btnClose_Click (object sender, System.EventArgs e) { Close(); }
LIST BOXES
DISPLAY THE CONTENTS OF AN ALBUM IN THE LISTBOX CONTROL (continued) Action 13 Add a CloseAlbum method to close a previously opened album.
How-to
Result
private void CloseAlbum() { if (_bAlbumChanged) { _bAlbumChanged = false; DialogResult result = MessageBox.Show("Do you want " + "to save your changes to " + _album.FileName + ' ', "Save Changes ", MessageBoxButtons.YesNo, MessageBoxIcon.Question); if (result == DialogResult.Yes) { _album.Save(); } } _album.Clear(); }
Display a dialog to ask if the user wants to save any changes they have made.
Override the OnClosing method to ensure the album is closed on exit.
protected override void OnClosing (CancelEventArgs e) { CloseAlbum(); } private void btnOpen_Click (object sender, System.EventArgs e) { CloseAlbum(); using (OpenFileDialog dlg = new OpenFileDialog()) { dlg.Title = "Open Album"; dlg.Filter = "abm files (*.abm)" + "|*.abm|All Files (*.*)|*.*"; dlg.InitialDirectory = PhotoAlbum.DefaultDir; try { if (dlg.ShowDialog() == DialogResult.OK) { _album.Open(dlg.FileName); this.Text = _album.FileName; UpdateList(); } } catch (Exception) { MessageBox.Show("Unable to open " + "album\n" + dlg.FileName, "Open Album Error", MessageBoxButtons.OK, MessageBoxIcon.Error); } } }
Add a Click handler for the Open button to open an album and assign it to the ListBox.
How-to
a. Close any previously open album. b. Use the OpenFileDialog class to allow the user to select an album. c. Use the PhotoAlbum.Open method to open the file. d. Assign the album s file name to the title bar of the form. e. Use a separate method for updating the contents of the list box.
LIST CONTROLS
DISPLAY THE CONTENTS OF AN ALBUM IN THE LISTBOX CONTROL (continued) Action 16 Implement a protected UpdateList method to initialize the ListBox control. Result
protected void UpdateList() { lstPhotos.DataSource = _album; }
That s it! No need to add individual photographs one by one or perform other complicated steps to fill in the list box. Much of the code is similar to code we saw in previous chapters. The one exception, the UpdateList method, simply assigns the DataSource property of the ListBox control to the current photo album.
protected void UpdateList() { lstPhotos.DataSource = _album; }
The DataSource property is part of the data binding support in Windows Forms. Data binding refers to the idea of assigning one or more values from some source of data to the settings for one or more controls. A data source is basically any array of objects, and in particular any class that supports the IList interface.1 Since the PhotoAlbum class is based on IList, each item in the list, in this case each Photograph, is displayed by the control. By default, the ToString property for each contained item is used as the display string. If you recall, we implemented this method for the Photograph class in chapter 5 to return the file name associated with the photo. Compile and run your code to display your own album. An example of the output is shown in figure 10.2. In the figure, an album called colors.abm is displayed, with each photograph in the album named after a well-known color. Note how the GroupBox controls display their keyboard access keys, namely Alt+A and Alt+P. When activated, the focus is set to the first control in the group box, based on the assigned tab order.
Copyright © OnBarcode.com . All rights reserved.