Can I use a String as a Variable Name?

[casManG]

Hello

Is it possible to get a variable from a string?
Example:

myVar = 9

lablel1.text = "myVar"

Debug.WriteLine( SuperCoolParseFunction(label1.text))
//Now i want the debugwindow to say: 9

Is that possible, to write the name of a variable and get its value?

Thanks

casmang

[casManG]

Inside quotation you can put whatever you want, no matter if it's name of control or even if it's reserved word.
But, in your question i found that you are not asking about this but rather to get value of declared variable, and in that case it should be:

lablel1.text = myVar 'without quotation

Happy coding

No No...I really just want to use the value of a string as a variable name...

So, if I had a string like this


myString = "myVar"


I want to be able to say

Debug.Writeline (somefunction(myString))

and get the VALUE of myVar rather than it printing out "myVar" as a string.


Another example would be


myVar = 9

myString = "myVar" //as a text value

now, I want to use the value of myString as the Variable Name in an expression. Is that possible to convert a string value to use as a variable name?

[casManG]

Ok i see but in example to the above your Label would have text 9 ... means value of myVar would be transfered to label. is that what you want?

I really don't want anything to do with the example, I just want to know if it is possible to use the value of a string as a variable name...for example, if I gave every letter in the alphabet a numeric value. Then I had a textbox on my form that I typed in the letter "m" and hit a button, I want to print out what the numeric value of "m" is based upon the value I gave "m" in my code.

for example

Dim a, b, c, d, m as Integers

a = 55
b = 32
c = 2
d = 35
m = 16

After this, I enter "m" into the textbox and hit a button and I want to write the value of my entered letter to the debug console. In this case I would have to assign the text of the textbox to a variable, but now I don't know how to use the text as a variable name to print out the value of "m"

[<ABX]

He means get the value of a Field Dynamicly by the text value of its name.

Yes this is possible thru relflection, but is not very good practice.

Option Explicit On 
 
Imports System.Reflection
 
Public Class Form1
    Inherits System.Windows.Forms.Form
 
    Private MyVariable1 As String = "Value1"
    Private MyVariable2 As String = "Value2"
 
' FORM DESIGNER CODE OMMITED 
 
    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
 
        Dim t As Type = Me.GetType ' Since the values are contained within this form
        Dim Field As FieldInfo = t.GetField(InputBox("Type Variable Name"), BindingFlags.NonPublic Or BindingFlags.Instance)
 
        If Not IsNothing(Field) Then
 
            MsgBox(Field.GetValue(Me))
 
        Else
            MsgBox("Invaild Variable Name, IT IS CASE SENSTIVE!")
 
        End If
 
    End Sub
End Class

[taxes]

Hi,

You could also do this by using a single dimension array and use the element number in the way you want to use the variable name. e.g

Dim arrTest() As Integer = {0, 1, 2, 3, 4, 5}
 TextBox1.Text = "3"
 MessageBox.Show(arrtest(Integer.Parse(TextBox1.Text)).ToString)