For Each node As SiteMapNode In SiteMap.CurrentNode.ChildNodes in VS .NET

Generate QR Code 2d barcode in VS .NET For Each node As SiteMapNode In SiteMap.CurrentNode.ChildNodes

For Each node As SiteMapNode In SiteMap.CurrentNode.ChildNodes
Paint QR Code In .NET Framework
Using Barcode encoder for ASP.NET Control to generate, create QR-Code image in ASP.NET applications.
www.OnBarcode.com
Create 2D In .NET
Using Barcode printer for ASP.NET Control to generate, create Matrix image in ASP.NET applications.
www.OnBarcode.com
You start with the For Each statement, and then you define a variable, node, which is of type SiteMapNode. Like all variables, node is a placeholder; in this case, you re using node to indicate the node I m looking at right now. You use As to indicate that node is of the type SideMapNode, because that s the kind of objects that ChildNodes contains. Then you use In to indicate where the loop should find the SiteMapNode objects to use, which in this case is inside SiteMap.CurrentNode.ChildNodes. When the loop starts, the first node from the ChildNodes collection gets loaded into node. You take an action on node, in this case extracting the title and adding it to the label:
Barcode Printer In .NET
Using Barcode generation for ASP.NET Control to generate, create Barcode image in ASP.NET applications.
www.OnBarcode.com
PDF-417 2d Barcode Drawer In .NET
Using Barcode drawer for ASP.NET Control to generate, create PDF 417 image in ASP.NET applications.
www.OnBarcode.com
Me.lblChildNodes.Text += node.Title + "<br />"
Printing Linear Barcode In VS .NET
Using Barcode generator for ASP.NET Control to generate, create Linear Barcode image in ASP.NET applications.
www.OnBarcode.com
Barcode Generation In .NET
Using Barcode generation for ASP.NET Control to generate, create Barcode image in ASP.NET applications.
www.OnBarcode.com
You could take more than one action, of course, assuming you want that action to be repeated multiple times. The loop ends with Next. When the loop reaches that point, it dumps the current content of node, and repeats the loop on the next SiteMapNode object from ChildNodes. When the loop has gone through each item in the collection, it stops, and execution of the code continues from after the loop.
Encoding UPC A In Visual Studio .NET
Using Barcode creator for ASP.NET Control to generate, create UCC - 12 image in ASP.NET applications.
www.OnBarcode.com
Painting Leitcode In VS .NET
Using Barcode encoder for ASP.NET Control to generate, create Leitcode image in ASP.NET applications.
www.OnBarcode.com
In this code, you are setting the Text property of lblCurrentNode to reflect the Title property of the SiteMap s CurrentNode. The SiteMap is an in-memory representation of a site s navigational structure. The SiteMap object itself is created by the site map provider (in this case, by the SiteMapDataSource).
QR Creator In None
Using Barcode drawer for Online Control to generate, create Denso QR Bar Code image in Online applications.
www.OnBarcode.com
Read QR Code ISO/IEC18004 In C#
Using Barcode decoder for .NET Control to read, scan read, scan image in .NET applications.
www.OnBarcode.com
Navigation |
DataMatrix Creation In Java
Using Barcode generation for Java Control to generate, create ECC200 image in Java applications.
www.OnBarcode.com
Generating Universal Product Code Version A In Objective-C
Using Barcode encoder for iPad Control to generate, create UCC - 12 image in iPad applications.
www.OnBarcode.com
VB CHEAT SHEET
EAN-13 Supplement 5 Maker In None
Using Barcode encoder for Software Control to generate, create GS1 - 13 image in Software applications.
www.OnBarcode.com
Make Barcode In Java
Using Barcode encoder for Java Control to generate, create Barcode image in Java applications.
www.OnBarcode.com
Catching Errors
Recognize Universal Product Code Version A In None
Using Barcode reader for Software Control to read, scan read, scan image in Software applications.
www.OnBarcode.com
Scan Barcode In Visual Studio .NET
Using Barcode recognizer for .NET Control to read, scan read, scan image in Visual Studio .NET applications.
www.OnBarcode.com
In Example 6-17, you can see the code that sets the text of your labels is contained within a block named Try. This is how VB accounts for unexpected errors. If an error occurs inside the Try block (known as throwing an exception), you can take action specific to the error by putting that error-handling code in a Catch block. In this case, there are two Catch blocks: the first one occurs if an error is thrown of type System. NullReferenceException, meaning that the page doesn t have a valid reference to the XML file that stores the site map. If that happens, lblCurrentNode outputs an error message specific to the problem. The second Catch block is a general case, specific to any error of type System.Exception. In this case, lblCurrentNode displays a general error message, and adds the Message property of the captured error, which is automatically generated by ASP.NET. Neither message fixes the problem, but at least the user will know what happened if an exception is thrown. Notice that the Try block ends with an End Try statement, which comes after all the
Read USS Code 39 In Java
Using Barcode recognizer for Java Control to read, scan read, scan image in Java applications.
www.OnBarcode.com
Paint ANSI/AIM Code 39 In Java
Using Barcode creation for Java Control to generate, create Code 39 image in Java applications.
www.OnBarcode.com
Catch blocks.
Paint ECC200 In Java
Using Barcode creation for Android Control to generate, create Data Matrix 2d barcode image in Android applications.
www.OnBarcode.com
Scanning Code 39 Full ASCII In VB.NET
Using Barcode decoder for Visual Studio .NET Control to read, scan read, scan image in .NET applications.
www.OnBarcode.com
The CurrentNode property returns an object of type SiteMapNode, and the Title property of that SiteMapNode returns the title of that SiteMapNode. The SiteMapNode s property HasChildNodes returns a Boolean, which is True if there are subnodes to the SiteMapNode. If this is the case, you can iterate through the SiteMapNodeCollection returned by the ChildNodes property. If there are no child nodes, this code does nothing. When you view this page, the labels display the name of the current node and all its child nodes, as shown in Figure 6-24.
Bread Crumbs
The final thing to add to our example is bread crumbs. Recall from the earlier discussion, bread crumbs are an indicator of where you are in the page hierarchy and how you got there. This is done using the ASP.NET SiteMapPath control. To see this, go back to MasterPage.master in Design view. From the Navigation section of the Toolbox, drag a SiteMapPath control onto the page between the AdventureWorks heading and the horizontal rule, as shown in Figure 6-25. That s all there is to it! Run the site and you ll see how the breadcrumbs tell you where you are at all times.
|
Copyright © OnBarcode.com . All rights reserved.