print barcode labels using vb.net CHA PTE R 8 in C#.NET

Paint Data Matrix 2d barcode in C#.NET CHA PTE R 8

CHA PTE R 8
Encoding DataMatrix In C#
Using Barcode creation for .NET Control to generate, create DataMatrix image in .NET framework applications.
www.OnBarcode.com
Reading DataMatrix In Visual C#
Using Barcode scanner for .NET framework Control to read, scan read, scan image in Visual Studio .NET applications.
www.OnBarcode.com
DIALOG BOXES
Data Matrix 2d Barcode Maker In C#
Using Barcode generation for .NET framework Control to generate, create Data Matrix 2d barcode image in VS .NET applications.
www.OnBarcode.com
Make Barcode In C#
Using Barcode encoder for Visual Studio .NET Control to generate, create Barcode image in Visual Studio .NET applications.
www.OnBarcode.com
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13); this.ClientSize = new System.Drawing.Size(344, 125); this.ControlBox = false; this.Controls.AddRange(new System.Windows.Forms.Control[] { this.txtCaption, this.lblImage, this.label2, this.label1, this.btnCancel, this.btnOK}); this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedDialog; this.MaximizeBox = false; this.MinimizeBox = false; this.Name = "CaptionDlg"; this.ShowInTaskbar = false; this.StartPosition = System.Windows.Forms.FormStartPosition.CenterParent; this.Text = "CaptionDlg"; this.ResumeLayout(false); } #endregion
2D Creator In C#.NET
Using Barcode generator for .NET framework Control to generate, create 2D image in .NET applications.
www.OnBarcode.com
Making EAN 128 In Visual C#.NET
Using Barcode drawer for VS .NET Control to generate, create GTIN - 128 image in .NET applications.
www.OnBarcode.com
Our dialog box is now ready from a display perspective. There is still the matter of making sure our main form can make use of it to edit a caption for an image. For this, we will need to add some properties to our CaptionDlg class. 8.3.4 ADDING PROPERTIES TO THE CAPTIONDLG FORM So far we have modified our data layer to understand photograph captions, and created a dialog to use for editing this caption. To integrate this dialog with the rest of our application, we need to ensure that the MainForm class can set the text to appear in the Label and TextBox controls of a CaptionDlg instance before the dialog is displayed, and retrieve the modified TextBox value after the dialog is finished. We must also ensure that the result of the dialog, whether the user pressed OK or Cancel, can be detected by the caller. If we were programming in C++, we might create SetImage, SetCaption, and GetCaption methods to allow the lblImage and txtCaption values to be modified. In C#, the property construct provides a slightly more elegant solution.
Encode UPC-A Supplement 5 In C#.NET
Using Barcode creation for .NET Control to generate, create GS1 - 12 image in Visual Studio .NET applications.
www.OnBarcode.com
Make USD - 8 In C#.NET
Using Barcode encoder for .NET framework Control to generate, create USD8 image in .NET framework applications.
www.OnBarcode.com
ADD IMAGELABEL AND CAPTION PROPERTIES TO OUR DIALOG Action 1 Add an ImageLabel property to the CaptionDlg.cs source window. Result
Drawing ECC200 In Java
Using Barcode maker for Java Control to generate, create Data Matrix ECC200 image in Java applications.
www.OnBarcode.com
Making DataMatrix In .NET Framework
Using Barcode creator for .NET Control to generate, create Data Matrix 2d barcode image in .NET applications.
www.OnBarcode.com
public string ImageLabel {
Print ANSI/AIM Code 39 In Java
Using Barcode maker for Android Control to generate, create ANSI/AIM Code 39 image in Android applications.
www.OnBarcode.com
Barcode Drawer In None
Using Barcode generator for Software Control to generate, create Barcode image in Software applications.
www.OnBarcode.com
MODAL DIALOG BOXES
DataMatrix Drawer In None
Using Barcode creation for Software Control to generate, create Data Matrix 2d barcode image in Software applications.
www.OnBarcode.com
Paint Barcode In Java
Using Barcode creation for Java Control to generate, create Barcode image in Java applications.
www.OnBarcode.com
ADD IMAGELABEL AND CAPTION PROPERTIES TO OUR DIALOG (continued) Action 2 Implement set for this property to modify the text for the lblImage label.
Scan UCC-128 In Visual Basic .NET
Using Barcode scanner for .NET Control to read, scan read, scan image in .NET applications.
www.OnBarcode.com
Code-128 Drawer In None
Using Barcode creation for Online Control to generate, create Code 128 Code Set B image in Online applications.
www.OnBarcode.com
Result
Barcode Printer In .NET Framework
Using Barcode creator for ASP.NET Control to generate, create Barcode image in ASP.NET applications.
www.OnBarcode.com
Read USS Code 128 In VS .NET
Using Barcode recognizer for .NET Control to read, scan read, scan image in .NET framework applications.
www.OnBarcode.com
set { lblImage.Text = value; }
USS Code 128 Creation In None
Using Barcode generator for Word Control to generate, create Code 128 image in Word applications.
www.OnBarcode.com
USS Code 128 Scanner In VB.NET
Using Barcode reader for .NET framework Control to read, scan read, scan image in Visual Studio .NET applications.
www.OnBarcode.com
Note: This code relies on the .NET Framework to display this value in the control and deal with an empty or null string.
public string Caption { set { txtCaption.Text = value; }
Add a Caption property. Implement set for this property to modify the text for the txtCaption text box. Implement get to return this text value.
get { return txtCaption.Text; } }
These properties will allow the values in the dialog to be set and retrieved as appropriate. Our last task is to return the appropriate value based on which button the user selects. We have already seen how the DialogResult enumeration encapsulates the possible values returned by the MessageBox.Show method. For Form objects, the ShowDialog method returns this enumeration for a similar purpose. Here, we would like this method to return DialogResult.OK if the user clicks the OK button or presses the Enter key, and DialogResult.Cancel if the user clicks the Cancel button or presses the Esc key. The Form class handles the keyboard values, namely the Enter and Esc keys, directly via the AcceptButton and CancelButton properties. We will look at returning the proper value from the ShowDialog method in a moment.
ALLOW THE DIALOG TO BE CLOSED VIA THE KEYBOARD Action 6 From the CaptionDlg.cs [Design] window, assign the OK button as the accept button for the form, to be activated when the user presses the Enter key.
How-to
Result
a. Display the properties for the form. b. Click the down arrow to the right of the AcceptButton entry in the list. c. Select btnOK.
CHA PTE R 8
DIALOG BOXES
ALLOW THE DIALOG TO BE CLOSED VIA THE KEYBOARD (continued) Action 7 Similarly, set the
CancelButton property to the btnCancel button.
Result These settings assign each property to the selected button object in the InitializeComponent method of the CaptionDlg.cs source file.
this.AcceptButton = this.btnOK; this.CancelButton = this.btnCancel;
The Form now invokes the OK or Cancel button when the user presses the Enter or Esc key, respectively. We also need to ensure that the ShowDialog method returns the proper result when one of these buttons is clicked or invoked via the keyboard. The Button class provides a DialogResult property for this purpose. When this property is set, clicking the corresponding button will automatically hide the parent form and return the selected result.3 We already set these properties to the appropriate values while creating the buttons, so the InitializeComponent method already defines these settings.
btnOK.DialogResult = System.Windows.Forms.DialogResult.OK; btnCancel.DialogResult = System.Windows.Forms.DialogResult.Cancel;
We will see how the settings interact with the ShowDialog method when we display the dialog from our MainForm class. This is our next topic. 8.3.5 DISPLAYING THE DIALOG IN THE MAINFORM CLASS We can now turn to our MainForm class in order to invoke the dialog and edit a photo s caption. We do this via our menu bar, of course. Since we are editing an aspect of the photo, we will place a Caption menu item under the Edit menu. This section defines our new menu and creates a Click handler for this menu to display the CaptionDlg form to the user. We will begin by adding a new menu item to our main form.
ADD A CAPTION ITEM TO THE EDIT MENU Action 1 Click the Edit menu in the MainForm.cs [Design] window. Add a menu separator after the Remove menu item. Result
The term hide here is intentional. Pursuant to our earlier discussion on the equivalence of Close and Dispose, modal dialog boxes must be disposed of manually to allow their members to be accessed after ShowDialog returns. As a result, the framework only hides our dialog by calling the Hide method when the OK or Cancel button is clicked.
Copyright © OnBarcode.com . All rights reserved.