Column 'a' does not allow null values.

Hello There,
I have a simple table in Sql and a dataset in c#. In order to get the delete and update and save commands I had to make one of the columns a primary key and I made its type int.

I know a primary key cannot allow nulls, so I am not sure how to get around this error

 when I go to send data to the dataset I get the following error:

NoNullAllowedException was unahndled.



Column 'a' does not allow nulls.

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            this.tasksTableAdapter.Fill(this.RTDB.tasks);
            RescueTechDBDataSet.tasksRow newtasksrow = RTDB.tasks.NewtasksRow();

            newtasksrow.trackingnumber = trackingnumber.Text;
           
            RTDB.tasks.Rows.Add(newtasksrow);
            tasksTableAdapter.Update(RTDB);
            this.tasksTableAdapter.Fill(this.rescueTechDBDataSet.tasks);
            RefreshDataset();
LVL 3
JasonWinnAsked:
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landerdCommented:
Have you made the primary key field an Identity field as well (to automatically insert and increment values) ?
JasonWinnAuthor Commented:
Yes I made it identity field with the following:
(is identity) : yes
Identity increment: 1
identity seed: 1
landerdCommented:
...and you are not implicitly attmpting to insert a null value to the identity field?
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JasonWinnAuthor Commented:
Not that I am aware of. I just have 4 textboxes trying to put data into 4 columns, the 5th column is the primary key column.

Thanks!
landerdCommented:

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rbrogan_eeCommented:
You can also just use a dummy value.  When the datadapter does the update, the identity column will generate the new primary key and when you refresh your dataset it will have the new value.
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