barcode label printing in vb.net A Label displays the current scope An Image displays an icon which represents the target state in Visual Studio .NET

Printer ECC200 in Visual Studio .NET A Label displays the current scope An Image displays an icon which represents the target state

A Label displays the current scope An Image displays an icon which represents the target state
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<asp:HyperLink id="lnkToggle" runat="server" Text="Show Shared View" /> A HyperLink allows the </div> user to toggle the </asp:PlaceHolder> personalization scope
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The HTML for the PageTasks controls provides a Label that will be used to display the current personalization scope to the user, as well as an Image and a HyperLink to allow the user to toggle the personalization scope. There are a couple things worth noticing here. The HTML DIV element that contains the PageTasks controls is given an ID so that we can refer to it both with client-side JavaScript and CSS. By writing CSS code and placing it in the default.css file for the current theme, we can provide the PageTasks panel with a suitable look and feel. In this case we will simply give it a light-grey background and a solid border at the bottom so that it looks like its own distinct section on the page. Open the default.css file and add the following CSS definition for the PageTasks panel:
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#pagetasks { background-color: #eeeeee; color: #333333; text-align: left ; border-bottom: 1px solid #cccccc; }
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The beauty of having the style definition in the themes folder is that whenever we want to create a new theme, we can also create a look and feel for our PageTasks panel suitable to the surrounding feel of the page. The same can be said of the image we are using alongside the link for toggling the scope. As you can see, this Image control loads its content from an images folder underneath the App_Themes folder. At runtime this image points to the images folder for the current theme of the application in our case that will be the images folder underneath the folder named Blue in the App_Themes folder. Now that we have the visual elements in place for the PageTasks controls, we can write the logic that first determines whether they are visible for the current user. Then we can write the logic for toggling the scope of the page. The best place for the logic that chooses whether the PageTasks panel is displayed is in the PreRender phase for the page. The reason for putting the logic here is that we want it to run as late as possible to ensure it only runs once and we therefore incur the cost of running the code just once. If we put the code for manipulating the PageTasks controls too early in the page s lifecycle, we run the risk of it running twice. This is because when the ToggleScope method is called, a Server.Transfer is invoked, which means the page will run through its initialize and loading events twice. The code displayed in listing 6.8 shows the logic required to manage the controls in the PageTasks panel.
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Listing 6.8 The OnPreRender method is used to conditionally display the PageTasks panel and to manage the state of the controls within the panel.
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protected override void OnPreRender(EventArgs e) { base.OnPreRender(e); this.pnlPageTasks.Visible = _wpm.Personalization.CanEnterSharedScope; if( this.pnlPageTasks.Visible ) { string path = this.Request.Url.AbsolutePath;
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Ascertain whether the user can view the PageTasks panel
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Display controls to toggle into shared scope mode
if (_wpm.Personalization.Scope == PersonalizationScope.User) { lblCurrentScope.Text = "Current Page Scope: Per-User"; imgToggle.ImageUrl = "~/App_Themes/Images/allusr.GIF"; lnkToggle.Text = "Show Shared View"; lnkToggle.NavigateUrl = path + " view=shared"; } else { lblCurrentScope.Text = "Current Page Scope: Shared View"; imgToggle.ImageUrl = "~/App_Themes/Images/perusr.GIF"; lnkToggle.Text = "Show Per-User View"; Display controls to lnkToggle.NavigateUrl = path; toggle into per} user scope mode
Notice how we first check to see whether the user can enter shared scope mode and we set the visibility of the PageTasks panel based on that. We then configure the display text, image URL, and the hyperlink based on the current personalization scope of the page. If the current scope is per-user, the controls are configured to allow the page to be toggled into shared scope mode and vice versa. The logic for toggling the personalization scope is based off of a querystring argument named view. If the view querystring argument is present and its value is shared, the page should be displayed in shared scope mode, or else it should be displayed in per-user mode. The code that performs this check is placed in the OnInit phase of the page so that it is run as early as possible. Listing 6.9 shows the logic for managing the current personalization scope of the page:
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