Load text in Array and display on other webpage

[asmx126453]

Hey Guys i need help with this last thing i cant get to work

The error i get with it is:
NullReferenceEx ception was unhandled by user code

Object reference not set to an instance of an object.

        #region adding textfields from database 
        public void Filling_Textfields(string[] OfferteArray, bool nieuw)
        {
            txtNoteID.Text = txtNoteID.Text;
            txtBTW.Text = "19";
            txtOfferteNr.Text = txtOfferteNr.Text;
            txtDatum.Text = Functions.DateToNL(txtDatum.Text);
            txtDebNr.Text = txtDebNr.Text;
            txtKlantNaam.Text = OfferteArray[4];
            txtContactpersoon.Text = txtContactpersoon.Text;
            txtOmschrijving.Text = txtOmschrijving.Text;
            txtOrderNr.Text = txtOrderNr.Text;

Now i get an error on the rule: txtKlantNaam.Te xt = OfferteArray[4];

what i whanne get done is that it loads some values from my previos page to this 1
The only thing that he loads in the page now is 19 from the BTW

it first worked with the OfferteArray but now something is wrong but i dont now what if yuo have onther way how i can load some values from the previos page in this one i am all ear

[r035198x]

In txtKlantNaam.Te xt = OfferteArray[4];, either txtKlantNaam is null or the array OfferteArray itself is null. You can find out which one it is by a simple if test.

[asmx126453]

Okey i cheked if it whas null like this

    txtNoteID.Text = txtNoteID.Text;
            if (txtNoteID.Text == null)
            {
                txtBTW.Text = "20";
            }

and now BTW is not being fild in so it looks like the txtbox is not null if i am right

i cudent use the code OfferteArray becase than i get an error before he executes the code

[r035198x]

Don't test the Text property for null. Test the objects themselves for null, i.e the text boxes or labels themselves.

[asmx126453]

Srry but i dont realy understand what you mean cud you give some more information about what to do

[r035198x]

if you do if(xtNoteID.Tex t == null) you are checking if xtNoteID's Text is null or not. if you do if(xtNoteID == null), you are testing if xtNoteID itself is null or not. The null reference exception is caused by dereferencing an object which is null(i.e using . on an object which is null). In your code, you never called dot on the Text, you called dot (.) on the xtNoteID itself (e.g in xtNoteID.Text). So you need to test whether xtNoteID is null or not. Don't forget to check the array also.

[asmx126453]

Well i did i like that way now when i check my txtbox it is not null

but my OfferteArray i cant check becase i get the error again what i have posted here i just dont now wy it wont work becase i have more codes like that and and that 1 i dont get an error

            if (nieuw == false)
            {
                txtReferentieNr.Text = OfferteArray[8];
                txtSubTotaal.Text = OfferteArray[9].Replace(",", ".");
                txtBTW.Text = OfferteArray[11];

at these i dont get an error but there is no differene in the code

[r035198x]

To check if the array itself is null or not, then you can use if(OfferteArray == null).

P.S This really should be starting to be clear to you by now.

[asmx126453]

Yep i know but i am not an expert yet and about the error

OfferteArray is null your right

[Frinavale]

Yep i know but i am not an expert yet and about the error

OfferteArray is null your right

Just so you know, NullReferenceEx ceptions occur when you attempt to use an Object that is null (hasn't been instantiated yet).

[asmx126453]

hey

i dont realy now what you mean with instantiated ??

i am from holland and i dont realy now what you mean with that can u give me some more information on it

[r035198x]

object o;
The reference o has been created but it is pointing to nothing (null).
o = new object();
Now the reference is pointing to an object which has been instantiated (created/initialized).
Better read a C# tutorial/textbook.