Object reference not set to an instance of an object

HERE'S MY SCRIPT;

<%@dotnet.itags.org. Page Language="VB" Debug="True" CodePage="28599" %>
<%@dotnet.itags.org. Import NameSpace="System.Data" %>
<script runat="server">
Sub Page_Load(Obj As Object,E As EventArgs)
'DataSet Nesnesini Olustur -------
Dim ds as new DataSet("ornek_dataset")
'Tablo Olustur-----------
Dim musteritable as New DataTable("müsteriler")
'Tabloya Sutunlar Ekle--------
musteritable.Columns.Add ("ad",System.Type.GetType("System.String"))
musteritable.Columns.Add ("soyad",System.Type.GetType("System.String"))
musteritable.Columns.Add ("meslek",System.Type.GetType("System.String"))
musteritable.Columns.Add ("yas",System.Type.GetType("System.Int32"))
'Tabloyu DataSete Ekle --------
ds.Tables.Add(musteritable)
'Satir Olusturup, Veri Gir-------
Dim sira As DataRow = musteritable.NewRow
sira("ad")="Zafer"
sira("soyad")="Demirkol"
sira("meslek")="Web Programcýsý"
sira("yas")="33"
musteritable.rows.Add(sira)

Dim sira1 As DataRow = musteritable.NewRow
sira("ad")="Serdar"
sira("soyad")="Benli"
sira("meslek")="Pazarlamacý"
sira("yas")="32"
musteritable.rows.Add(sira1)

Dim sira2 As DataRow = musteritable.NewRow
sira("ad")="Denizhan"
sira("soyad")="Akkaya"
sira("meslek")="Muhasebeci"
sira("yas")="26"
musteritable.rows.Add(sira2)

Dim sira3 As DataRow = musteritable.NewRow
sira("ad")="Levent"
sira("soyad")="Demirkol"
sira("meslek")="Aþcý"
sira("yas")="28"
musteritable.rows.Add(sira3)
'----~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~-----
Response.Write(ds.Tables("musteriler").rows(2)("ad") & "<br>")

Dim satir_3 As Datarow
satir_3 = ds.Tables("musteriler").rows(2)
Response.Write(satir_3(0) & "<br>")

Dim siralar As DataRowCollection
siralar=ds.Tables("musteriler").rows
Response.Write(siralar(2)("ad") & "<br>")

Dim tablo_degiskenim As DataTable
tablo_degiskenim = ds.Tables("musteriler")
Response.Write(tablo_degiskenim.rows(2)(0) & "<br>")

End sub
</script
AND THE ERROR PAGE;

Object reference not set to an instance of an object.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.

Source Error:

Line 43: musteritable.rows.Add(sira3)
Line 44: '----~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~-----
Line 45: Response.Write(ds.Tables("musteriler").rows(2)("ad") & "<br>")
Line 46:
Line 47: Dim satir_3 As Datarow

Source File: D:\ASP.NET\dataset_olustur2.aspx Line: 45

I COULDN'T SEE THE MISTAKE, CAN YOU HELP ME?
THANX ...When you created the table, you called it "müsteriler".

Then, when you referenced it on Line 45, you called it "musteriler" ... with no accent ...
Oh yeah ! :)
...

I am bad at my native-lang "Turkish" just like I am bad at English ...
ü is a fuckin' letter in our keyboards ...

...

Thanx NewKid2 ...
If you find this happening too often, considerchanging the language of your computer.

Object reference not set to an instance of an object.

Hi All

When using the this code

<%@dotnet.itags.org. Page Language="VB" %>
<%@dotnet.itags.org. import Namespace="System.Data" %>
<%@dotnet.itags.org. import Namespace="System.Data.SqlClient" %>
<script runat="server"
 Sub Button2_Click(sender As Object, e As EventArgs)
 Dim conn As new sqlconnection ("server='sql2.redstation.co.uk'; user id='2128779.150'; password='CLT42876'; database='2128779.150'")
 dim dbcommanda as new sqlcommand("SELECT * from tblReg", conn)
 dim myDataSet as New Dataset()
 dim daprods as new sqldataadapter(dbcommanda)
 daprods.fill(myDataSet,"Tony")
 if myDataSet.Tables("Details").rows.count = 0 then
 response.write("Empty")
 end if
 conn.close()

I get this error

Server Error in '/' Application.
------------------------

Object reference not set to an instance of an object.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.

Source Error:

Can Anyone tell me what i am doing wrong?

rgs

TonyPlease specify what line the error occurs on. That will make it lots easier to diagnose.
At first glance, I think the problem might be that you are trying to reference a datatable in the dataset that doesn't exist - Details. When you filled the dataset...

daprods.fill(myDataSet,"Tony")

.. a datatable was created named Tony. The data would then have been loaded into that table. Next, you try to get info about a datatable named Details...

if myDataSet.Tables("Details").rows.count = 0 then

.. which doesn't exist. Two things you can do in order to test this theory:

1. don't provide any datatable name during fill():
daprods.fill(myDataSet).
Then reference the datatable by its ordinal value:
if myDataSet.Tables(0).rows.count = 0 then

2. Try change Tony to Details: daprods.fill(myDataSet,"Details")

Hopefully this helps or at least points you in the right direction.

Let me know if this works :-]
The problem appears to be that in your Fill call, you're telling it to fill a table called Tony. In your check for an empty return, you're checking against a table called Details. There is no Details table in your dataset, so you're trying to reference an object that doesn't exist, which is why you're getting that error.
JBR thanks

ProgUser....thanks for the tips...worked a treat