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The following code is my attempt to dynamically set the size of an array and then to dynamically assign values to it. However it is incomplete and I could do with some assistance.

Posted on 2004-08-30
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Last Modified: 2012-05-05
The following code is my attempt to dynamically set the size of an array and then to dynamically assign values to it. However it is incomplete and I could do with some assistance.

Any feedback would be appreciated.

If someone could complete the missing links in the code I would be very thankful.

Dim MyArray() As Integer
Dim nCountOfRecords As Integer
Dim I As Integer

Dim cnn As String = (ConfigurationSettings.AppSettings("SomeWebSite"))
    Dim objConnection as new sqlConnection(cnn)
     Dim objCommand as new SqlCommand("procThatCountsTheIDs", ObjConnection)
    objCommand.CommandType = CommandType.StoredProcedure
     
     Dim ObjCountRecords as new SqlParameter("@ObjCountRecords",SqlDbType.int)
     ObjCommand.Parameters.Add(ObjCountRecords)
     ObjCountRecords.Direction=ParameterDirection.Output 'Gets the value that will be the array size

Try
     objConnection.Open()
     ObjCommand.ExecuteNonQuery()
     objConnection.Close()
     Catch ex as Exception
     Response.Write("Error:" & ex.Message & "<br/>")
     End Try

' Assign the number of records to the 'nCountOfRecords' variable

nCountOfRecords =(ObjCommand.Parameters("@ObjCountRecords").Value)   'Should this be... (ObjCommand.Parameters("@ObjCountRecords").Value)-1.....?
    ReDim MyArray(nCountOfRecords)   ' re-dimension as needed

'It seems to me, the following code dynamically sets the size of the array so do I need to do another DbQuery and then assign the actual IDs to the  array?
    ' Assignment
    For I = 1 To nCountOfRecords
    MyArray(I) = I '<- this will a assign I to MyArray
    Next

'So now I need some code that assigns the ID to the newly created array

'So code here.............


'Now display ....say....MyArray(4) and MyArray(22)
'Just use a couple of labels or something.

Cheers

PG
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Comment
Question by:pgilfeather
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10 Comments
 
LVL 2

Expert Comment

by:dimitry_dimitry
ID: 11930456
Use array.createinstance to create an array of specified type and length.
use array.copy to copy elements from array 1 to array 2, specifying starting and ending bounds.
these routines can be used to implement array resizing.
You can also use ReDim statement
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Author Comment

by:pgilfeather
ID: 11930492
dimitry_dimitry

No point using English....Im using VB.NET

Cheers

PG
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LVL 2

Expert Comment

by:dimitry_dimitry
ID: 11930564
And what?
VB.NET does not allow dynamic array creation methods that I posted?
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Author Comment

by:pgilfeather
ID: 11930810
dimitry_dimitry,

Please dont mistake my short response as sarcasm, because I genuinly wasnt trying to be sarcastic.

The reason for such a short response was simply to convey that I was looking for some actual VB.NET code. It clearly says this in my question.

Sorry if I offended you, it was never my intention.

Thanks for trying to help, I really do appreciate it.

Kind Regards

PG
0
 
LVL 3

Expert Comment

by:IceColdas
ID: 11930823
try this one
Dim MyArray() As Integer
...
ReDim Preserve  MyArray(nCountOfRecords)
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Author Comment

by:pgilfeather
ID: 11930846
IceColdas

So how does this fit into my question.

Cheers

PG
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LVL 3

Accepted Solution

by:
IceColdas earned 500 total points
ID: 11930883
declare at first MyArray as an array of 50 elements (or whatever u want)
read every value in MyArray when u execute the DBquerry, and if the size of the array must grow, then allocate another 50 elements to it. And so on.
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Author Comment

by:pgilfeather
ID: 11930919
Thanks
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