How to use For/Each Technology in VB.NET
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When most of our developers are doing VB.NET development, when they encounter loop operations, they may think of VB.NET For/Next applications for * time. However, in some special cases, you can use VB.NET For/Each to traverse elements in an array or collection.
The VB.NET For/Each statement is written as follows:
For Each item In
Array or Collection
[statements]
Next
Example 2.10 (02-10.aspx) uses VB.NET For/Each to display all the data in an array.
< % Dim arrData(3) Dim stritem as string arrData(0)="Beijing" arrData(1)="Shanghai" arrData(2)="Guangzhou" For Each stritem In arrData Response.Write (stritem & "< br>")
Next
% >
As you can see, the difference between a VB.NET For/Each ring and a For/Next loop is that you need to specify the number of cycles in the For/Next loop, while you don't need to do this in the For/Each loop to iterate through all the contents of an array or collection. It is also important to note that this loop is usually used in collections.
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