I have read lots of posts about this error message, but none of them seem to address my problem. I've done this lots of times, but this time it's not working.
In my app I have a DataGridView to edit a data table in a MS Access database. I added the data table in the Dataset Designer. It added all the Select, Insert, Delete, and Update commands. I've inspected the properties and they are all there, properly constructed. The ID field is set as the PrimaryKey in the Access database. There are no other indexes set. In the Designer, I verified that the ID field has AutoIncrement = True, AutoIncrementSeed = 0, AutoIncrementStep = 1.
On my form I added the DataGridView and I dragged the data table to the DataGridView to connect the data table as the DataGridView's DataSource. I verified in the TableAdapterManager properties that the data table was connected. The relevant code looks like this:
Private Sub SelectTab() LstAttendanceEventsTableAdapter.Fill(PeopleDataSet.lstAttendanceEvents) LstAttendanceEventsBindingSource.Sort = "ID" End Sub Private Function SavePeople() As Boolean Cursor = Cursors.WaitCursor Dim Success As Boolean = False Try Validate() LstAttendanceEventsBindingSource.EndEdit() LstMaritalStatusesBindingSource.EndEdit() LstMemberTypesBindingSource.EndEdit() LstRelationshipsBindingSource.EndEdit() PeopleTableAdapterManager.UpdateAll(PeopleDataSet) Success = True Catch ex As Exception MessageBox.Show(ex.Message, My.Application.Info.ProductName, MessageBoxButtons.OK, MessageBoxIcon.Error) Success = False End Try SavePeople = Success Cursor = Cursors.Default End Function
When the UpdateAll command is called, that's when I get the error message "Update requires a valid InsertCommand when passed DataRow collection with new rows."
I put a breakpoint on the UpdateAll command line and used a watch to look at LstAttendanceEventsTableAdapter. There is a Select, Update, and Delete command but the InsertCommand is null.
This makes no sense to me. If the Designer has an Insert command, then why is there no InsertCommand in the form?
I've tried deleting and re-adding the TableAdapter and BindingSource on the form. I've tried deleting and re-adding the data table in the Designer. I've tried a brand new solution and it works perfectly, so it's not the Access database.
What is going on and how do I fix it?