How can assign a variable from string

Question

1.00/5 (2 votes)

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Hello there,
I have a long code. I give an example that looks like code below. The following example contains the same logic as my code.

How can I call a variable with a string?

So how can I call StrArr2 array from StrArr1 as the variable name in the first step of the loop?

VB

Dim StrArr1 As String() = {"StrArr2"}
Dim StrArr2 As String() = {"StrArr3", "StrArr4"}
Dim StrArr3 As String() = {"-1"}
Dim StrArr4 As String() = {"StrArr5"}
Dim StrArr5 As String() = {"-1"}

Dim StrArr = StrArr1
Dim StrList As New List(Of String)

Start:
For Each s As String In StrArr
    StrList.Add(s)
    If s <> "-1" Then StrArr = s : GoTo Start 
Next

What I have tried:

How can assign to value to StrArr

Posted 19-Feb-17 2:54am

gacar

Updated 19-Feb-17 4:17am

Bryian Tan

v2

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Comments

[no name] 19-Feb-17 9:17am

"call a variable with a string?", you don't. Nothing you wrote here makes any sense at all to me. You don't call variables. You don't call arrays from other arrays. If this is the same "logic" as your real code, you should start over.

Peter Leow 19-Feb-17 9:22am

I think you should tell us what you intend to achieve instead?

gacar 19-Feb-17 9:33am

I would like to invoke many xml files that are bound to one with one. With the above example, I want to construct this structure.

Graeme_Grant 19-Feb-17 9:44am

Show examples of the XML files that you want to work with and explain what you are trying to do with them.

Maciej Los 19-Feb-17 9:40am

Not sure what you want to achieve. Can you explain it?

gacar 19-Feb-17 9:46am

Forget it. Can i create a variable programmatically?

Graeme_Grant 19-Feb-17 9:52am

yes

gacar 19-Feb-17 10:20am

which ways?

Graeme_Grant 19-Feb-17 10:28am

Explain specifically what you are trying to do with examples.

PIEBALDconsult 19-Feb-17 11:13am

Maybe you want a switch/case statement?
Or Reflection?

3 solutions

Solution 5

Maybe this: Calling a Property or Method Using a String Name [^]

Posted 19-Feb-17 4:17am

Graeme_Grant

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Maciej Los · Accepted Answer · 2017-02-19T03:56:00

Not sure i understand you correctly, but there's no way to create variable programmatically from string. You can create a Dictionary(Of String, Object)[^] which can hold variable names and their addresses.

VB

Sub Main
	Dim StrArr1 As String() = {"StrArr2"}
    Dim StrArr2 As String() = {"StrArr3", "StrArr4"}
    Dim StrArr3 As String() = {"-1"}
    Dim StrArr4 As String() = {"StrArr5"}
    Dim StrArr5 As String() = {"-1"}

    Dim StrArr As Object

	Dim ListOfVariables As New Dictionary(Of String, Object)
	
	ListOfVariables.Add("StrArr1", StrArr1)
	ListOfVariables.Add("StrArr2", StrArr2)
	ListOfVariables.Add("StrArr3", StrArr2)
	ListOfVariables.Add("StrArr4", StrArr4)
	ListOfVariables.Add("StrArr5", StrArr5)
	
	StrArr = ListOfVariables("StrArr2")
	For Each s In StrArr
		Console.WriteLine(s)
	Next

End Sub

Returns:

StrArr3
StrArr4

gacar · Accepted Answer · 2017-02-19T04:11:00

I found this solution on here
Like as Maciej Los

 Dim StrArr1 As String() = {"StrArr2"}
        Dim StrArr2 As String() = {"StrArr3", "StrArr4"}
        Dim StrArr3 As String() = {"-1"}
        Dim StrArr4 As String() = {"StrArr5"}
        Dim StrArr5 As String() = {"-1"}

        Dim StrArr = StrArr1
        Dim StrList As New List(Of String)

        
Start:
        For Each s As String In StrArr
            StrList.Add(s)
            Dim variables As New Dictionary(Of String, String())
            variables(s) = {"StrArr2"} ' Set the value of the "variable"
            If s <> "-1" Then StrArr = variables(s) : GoTo Start
    Next

How can assign a variable from string

3 solutions

Solution 2

Solution 5

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