<div>
The problem is that you are making an indirect reference to a Value-type (your structure) which results in it being classed as an expression.<br />
You will have to declare a variable to hold a direct reference to the item and assign through that:<br />
<br />
<br />

<pre><code id="code-938756">For index As Int16 = 0 To _cache_List.Count - 1
   Dim item As _cache = _cache_list(index)
   item.loading = false
Next
</code></pre>
</div>


The problem is that you are making an indirect reference to a Value-type (your structure) which results in it being classed as an expression.
You will have to declare a variable to hold a direct reference to the item and assign through that:




For index As Int16 = 0 To _cache_List.Count - 1
   Dim item As _cache = _cache_list(index)
   item.loading = false
Next


<div>
Hi there<br />
So I change the Structure into Class and it works.<br />
I didnt know using structure will have different from class.<br />
<br />
Do you think i am doing the right thing.
</div>


Hi there
So I change the Structure into Class and it works.
I didnt know using structure will have different from class.

Do you think i am doing the right thing.

<div>
I will need to use class as I need to modify its values.
</div>


I will need to use class as I need to modify its values.

<div>
<div class="content wysiwyg-content">
Public Structure _cache<br />
&nbsp; &nbsp; Public loading As Boolean<br />
End Structure<br />
<br />
<br />
Public Class Server<br />
&nbsp; &nbsp; Public _cache_List As New List(Of _cache)()<br />
...<br />
<br />
For index As Int16 = 0 To _cache_List.Count - 1<br />
_cache_List(index).loading<wbr /> = false '--&gt; error<br />
Next<br />
<br />
&quot;Expression is a value and therefore cannot be the target of an assignment &quot;<br />
<br />
what was wrong in the code above?
</div>
</div>


Public Structure _cache
    Public loading As Boolean
End Structure


Public Class Server
    Public _cache_List As New List(Of _cache)()
...

For index As Int16 = 0 To _cache_List.Count - 1
_cache_List(index).loading = false '--> error
Next

"Expression is a value and therefore cannot be the target of an assignment "

what was wrong in the code above?

Expression is a value and therefore cannot be the target of an assignment  vb.net

The .NET Framework is not specific to any one programming language; rather, it includes a library of functions that allows developers to rapidly build applications. Several supported languages include C#, VB.NET, C++ or ASP.NET.

.NET Programming

Visual Basic .NET (VB.NET) is an object-oriented programming language implemented on the .NET framework, but also supported on other platforms such as Mono and Silverlight. Microsoft launched VB.NET as the successor to the Visual Basic language. Though it is similar in syntax to  Visual Basic pre-2002, it is not the same technology,