check om int

Try
  Convert.ToInt32( penis )
  Catch ex As Exception
//    "kun bogstaver"
End Try

se også:
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpref/html/frlrfSystemConvertClassToInt32Topic13.asp

jeg har brugt isdigit

kan du så svare på hvordan jeg vælken en der skal være aktiv i en combobox???

SelectedIndex eller SelectedItem 
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpref/html/frlrfsystemwindowsformscomboboxmemberstopic.asp

Det kan jeg sku ikke få til at virke

okay, problemet er:

jeg har en combobox hvor datakommer fra et array...

det array er sorteret forkert... Hvordan sortere jeg i det array, så jeg får det højeste tal først og det højeste tal er valgt?

hvad med IsNumeric(string)?

Ville det ikke være nemmerer at bruge VB.net egen "Sort" ?

Eks. :
Dim a As Integer()  // array af integer
Array.Sort(a)  // sorterer

Nb. du kan soreterer på forskellige måder - se doc. for hjælp

Imports System
Imports Microsoft.VisualBasic

Public Class SamplesArray   
   
    Public Shared Sub Main()
       
        ' Creates and initializes a new Array.
        Dim myArray As Array = Array.CreateInstance(GetType(String), 9)
        myArray.SetValue("The", 0)
        myArray.SetValue("quick", 1)
        myArray.SetValue("brown", 2)
        myArray.SetValue("fox", 3)
        myArray.SetValue("jumped", 4)
        myArray.SetValue("over", 5)
        myArray.SetValue("the", 6)
        myArray.SetValue("lazy", 7)
        myArray.SetValue("dog", 8)
       
        ' Displays the values of the Array.
        Console.WriteLine("The Array initially contains the " _
          + "following values:")
        PrintIndexAndValues(myArray)
       
        ' Sorts the values of the Array.
        Array.Sort(myArray)
       
        ' Displays the values of the Array.
        Console.WriteLine("After sorting:")
        PrintIndexAndValues(myArray)
    End Sub
   
   
    Public Shared Sub PrintIndexAndValues(myArray As Array)
        Dim i As Integer
        For i = myArray.GetLowerBound(0) To myArray.GetUpperBound(0)
            Console.WriteLine(ControlChars.Tab + "[{0}]:" + ControlChars.Tab _
              + "{1}", i, myArray.GetValue(i))
        Next i
    End Sub
End Class

' This code produces the following output.
'
' The Array initially contains the following values:
'    [0]:    The
'    [1]:    quick
'    [2]:    brown
'    [3]:    fox
'    [4]:    jumped
'    [5]:    over
'    [6]:    the
'    [7]:    lazy
'    [8]:    dog
' After sorting:
'    [0]:    brown
'    [1]:    dog
'    [2]:    fox
'    [3]:    jumped
'    [4]:    lazy
'    [5]:    over
'    [6]:    quick
'    [7]:    the
'    [8]:    The
[C#]
using System;
public class SamplesArray  {

  public static void Main()  {

      // Creates and initializes a new Array.
      Array myArray=Array.CreateInstance( typeof(String), 9 );
      myArray.SetValue( "The", 0 );
      myArray.SetValue( "quick", 1 );
      myArray.SetValue( "brown", 2 );
      myArray.SetValue( "fox", 3 );
      myArray.SetValue( "jumped", 4 );
      myArray.SetValue( "over", 5 );
      myArray.SetValue( "the", 6 );
      myArray.SetValue( "lazy", 7 );
      myArray.SetValue( "dog", 8 );

      // Displays the values of the Array.
      Console.WriteLine( "The Array initially contains the following values:" );
      PrintIndexAndValues( myArray );

      // Sorts the values of the Array.
      Array.Sort( myArray );

      // Displays the values of the Array.
      Console.WriteLine( "After sorting:" );
      PrintIndexAndValues( myArray );
  }


  public static void PrintIndexAndValues( Array myArray )  {
      for ( int i = myArray.GetLowerBound(0); i <= myArray.GetUpperBound(0); i++ )
        Console.WriteLine( "\t[{0}]:\t{1}", i, myArray.GetValue( i ) );
  }
}
/*
This code produces the following output.

The Array initially contains the following values:
    [0]:    The
    [1]:    quick
    [2]:    brown
    [3]:    fox
    [4]:    jumped
    [5]:    over
    [6]:    the
    [7]:    lazy
    [8]:    dog
After sorting:
    [0]:    brown
    [1]:    dog
    [2]:    fox
    [3]:    jumped
    [4]:    lazy
    [5]:    over
    [6]:    quick
    [7]:    the
    [8]:    The
*/
[JScript]
import System;

// Creates and initializes a new Array.
var myArray : System.Array= System.Array.CreateInstance( System.String, 9 );
myArray.SetValue( "The", 0 );
myArray.SetValue( "quick", 1 );
myArray.SetValue( "brown", 2 );
myArray.SetValue( "fox", 3 );
myArray.SetValue( "jumped", 4 );
myArray.SetValue( "over", 5 );
myArray.SetValue( "the", 6 );
myArray.SetValue( "lazy", 7 );
myArray.SetValue( "dog", 8 );

// Displays the values of the Array.
Console.WriteLine( "The Array initially contains the following values:" );
PrintIndexAndValues( myArray );

// Sorts the values of the Array.
System.Array.Sort( myArray );

// Displays the values of the Array.
Console.WriteLine( "After sorting:" );
PrintIndexAndValues( myArray );
 
function PrintIndexAndValues( myArray : System.Array )  {
  for ( var i : int = myArray.GetLowerBound(0); i <= myArray.GetUpperBound(0); i++ )
      Console.WriteLine( "\t[{0}]:\t{1}", i, myArray.GetValue( i ) );
}
/*
This code produces the following output.

The Array initially contains the following values:
    [0]:    The
    [1]:    quick
    [2]:    brown
    [3]:    fox
    [4]:    jumped
    [5]:    over
    [6]:    the
    [7]:    lazy
    [8]:    dog
After sorting:
    [0]:    brown
    [1]:    dog
    [2]:    fox
    [3]:    jumped
    [4]:    lazy
    [5]:    over
    [6]:    quick
    [7]:    the
    [8]:    The
*/
[C++] No example is available for C++. To view a Visual Basic, C#, or JScript example, click the Language Filter button  in the upper-left corner of the page.

Hilsen Grasp

odegaard -> har C# et svar på IsNumeric? Jeg kan forstå på doc at IsNumeric er VB specifik right?
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vblr7/html/vafctIsNumeric.asp