pdf417 c# source Deleting an Object in C#

Generate PDF-417 2d barcode in C# Deleting an Object

Deleting an Object
PDF 417 Generator In C#.NET
Using Barcode creator for .NET Control to generate, create PDF417 image in .NET framework applications.
www.OnBarcode.com
PDF417 Scanner In Visual C#
Using Barcode scanner for Visual Studio .NET Control to read, scan read, scan image in VS .NET applications.
www.OnBarcode.com
Deleting a project or resource is a similar process. The user is prompted to select the item to delete. Then they are asked if they are sure they want to delete the item, and finally the item is deleted. The code to delete projects and resources is quite comparable; here s the code to delete a Resource object: private void DeleteResourceToolStripMenuItem_Click( object sender, EventArgs e) { ResourceSelect dlg = new ResourceSelect(); dlg.Text = "Delete Resource"; if (dlg.ShowDialog() == DialogResult.OK) { // get the resource id int resourceId = dlg.ResourceId; if (MessageBox.Show("Are you sure ", "Delete resource", MessageBoxButtons.YesNo, MessageBoxIcon.Question, MessageBoxDefaultButton.Button2) == DialogResult.Yes) { using (StatusBusy busy = new StatusBusy("Deleting resource...")) { try { Resource.DeleteResource(resourceId); } catch (Csla.DataPortalException ex) { MessageBox.Show(ex.BusinessException.ToString(), "Error deleting", MessageBoxButtons.OK, MessageBoxIcon.Exclamation); } catch (Exception ex) { MessageBox.Show(ex.ToString(), "Error deleting", MessageBoxButtons.OK, MessageBoxIcon.Exclamation); } } } } }
Matrix Maker In C#
Using Barcode printer for .NET Control to generate, create 2D image in .NET applications.
www.OnBarcode.com
Printing Barcode In C#.NET
Using Barcode generation for .NET framework Control to generate, create Barcode image in Visual Studio .NET applications.
www.OnBarcode.com
CHAPTER 9 s WINDOWS FORMS UI
Paint ECC200 In C#
Using Barcode creator for .NET framework Control to generate, create Data Matrix image in .NET framework applications.
www.OnBarcode.com
Make Barcode In Visual C#
Using Barcode maker for Visual Studio .NET Control to generate, create Barcode image in .NET applications.
www.OnBarcode.com
Though this looks like a lot of code, there are really only a couple lines of importance the rest provide the user with feedback during the process or implement exception handling. To start with, the user is prompted for the Resource to delete: ResourceSelect dlg = new ResourceSelect(); dlg.Text = "Delete Resource"; if (dlg.ShowDialog() == DialogResult.OK) If the user clicks the OK button, the ResourceId value is retrieved from the ResourceSelect dialog form, and the user is asked if they are sure they want to delete the object. Assuming they confirm the deletion, the Resource class is used to delete the object: Resource.DeleteResource(resourceId); Because the business classes implement all the data access, the code in the UI is entirely focused on the user experience not on adding, retrieving, or deleting data.
UPCA Maker In C#
Using Barcode generation for VS .NET Control to generate, create UPC A image in VS .NET applications.
www.OnBarcode.com
Painting MSI Plessey In C#.NET
Using Barcode maker for Visual Studio .NET Control to generate, create MSI Plessey image in .NET framework applications.
www.OnBarcode.com
RolesEdit
PDF417 Encoder In Java
Using Barcode generator for BIRT reports Control to generate, create PDF 417 image in BIRT reports applications.
www.OnBarcode.com
PDF417 Scanner In C#
Using Barcode recognizer for .NET Control to read, scan read, scan image in .NET applications.
www.OnBarcode.com
The RolesEdit user control allows an authorized user to edit the roles a resource can hold when assigned to a project. The simplest way to create such data maintenance forms is with the DataGridView control, because it can be directly bound to an editable root collection object such as ProjectTracker.Library.Roles.
Code 128 Code Set B Generation In Java
Using Barcode printer for Java Control to generate, create Code 128 Code Set B image in Java applications.
www.OnBarcode.com
QR Code JIS X 0510 Creator In None
Using Barcode printer for Software Control to generate, create QR Code ISO/IEC18004 image in Software applications.
www.OnBarcode.com
Using a Business Class as a Data Source
Read Code 128 In Visual Basic .NET
Using Barcode decoder for VS .NET Control to read, scan read, scan image in Visual Studio .NET applications.
www.OnBarcode.com
Recognizing Barcode In Java
Using Barcode Control SDK for Java Control to generate, create, read, scan barcode image in Java applications.
www.OnBarcode.com
To bind controls to an object, choose the Data Add New Data Source menu option in Visual Studio to bring up the Data Source Configuration Wizard. Choose the Object option in the first step, as shown in Figure 9-6.
Encoding QR Code 2d Barcode In Java
Using Barcode creation for Android Control to generate, create QR Code image in Android applications.
www.OnBarcode.com
Generate PDF417 In VS .NET
Using Barcode encoder for ASP.NET Control to generate, create PDF417 image in ASP.NET applications.
www.OnBarcode.com
Figure 9-6. Choosing an object data source
Encode EAN 13 In Java
Using Barcode encoder for Android Control to generate, create EAN / UCC - 13 image in Android applications.
www.OnBarcode.com
Code 39 Full ASCII Creator In None
Using Barcode generation for Font Control to generate, create USS Code 39 image in Font applications.
www.OnBarcode.com
CHAPTER 9 s WINDOWS FORMS UI
Painting Barcode In Java
Using Barcode generation for Android Control to generate, create Barcode image in Android applications.
www.OnBarcode.com
ANSI/AIM Code 128 Generator In None
Using Barcode printer for Word Control to generate, create USS Code 128 image in Microsoft Word applications.
www.OnBarcode.com
The next step in the wizard is to select the business class that will be the data source. All types in the current project and any referenced projects are listed. As shown in Figure 9-7, they are grouped by namespace.
Figure 9-7. Selecting the data source business class
s Tip
This wizard uses reflection to get this list, so the assemblies must be compiled before the classes will show up in this list. Make sure to build your solution before running the Data Source Configuration Wizard.
At this point, you can finish the wizard to add the class as a data source. The data sources appear in the Data Sources window. If this window isn t available, you can open it by using the Data Show Data Sources menu item in Visual Studio. Figure 9-8 shows the Data Sources window after all the root classes from 8 have been added as data sources. Notice how the classes are grouped by namespace to help you find them more easily. The illustration in Figure 9-8 shows the Roles class expanded to show its properties. When doing drag-and-drop data binding, you can drag entire classes or individual properties onto the form. In the case of the RolesEdit user control, the entire class was dragged onto the form, causing Visual Studio to create a DataGridView control. This control is bound to a rolesBindingSource object, which was also automatically added by Visual Studio. The resulting display is shown in Figure 9-9.
s Tip
The BindingSource controls appear in the component tray at the bottom of the designer in Visual Studio.
The new data binding in Windows Forms uses BindingSource controls. These controls sit between all the data bound controls in the UI and the actual data source object in this case, Roles.
Copyright © OnBarcode.com . All rights reserved.