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Item cannot be found in the collection corresponding to the requested name or ordinal

Posted on 2008-06-22
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Last Modified: 2008-06-22
Ok guys i cant work out why i keepp getting this message, i have check the debug.print out putin access and it works with no problems, and i have checked to make sure that this information is in the database and all the spelling is correct and it is, i guess  if it wasnt it wouldnt be working in access the out put i am getting in the debug windows is

 select * from [Student_Outcomes] where [OutcomeDate]  = #10/09/2007# And [StudentID] = 60

and then a message

A first chance exception of type 'System.Runtime.InteropServices.COMException' occurred in adodb.dll

Thanks in advance guys

Dim rs As New ADODB.Recordset
        Dim sql As String
        sql = "select * from [Student_Outcomes] where [OutcomeDate]  = #" & ListView2.SelectedItems.Item(0).SubItems(1).Text & "# And [StudentID] = " & TextBox7.Text
        Debug.Print(sql)
        studentnotes.Text = ""
        studentnotes.Text = (rs.Fields("OutcomeNotes").Value)
        rs.Close()

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Question by:awolarczuk
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10 Comments
 
LVL 142

Expert Comment

by:Guy Hengel [angelIII / a3]
ID: 21840017
where is your rs.open statement?
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LVL 24

Expert Comment

by:purplepomegranite
ID: 21840019
Your code snippet is incomplete, so it is difficult to tell what code is elsewhere with regards to the database connection.  However, while you declare the sql string, there is no declaration to actually populate the rs recordset with the result of this query?

Code should be something like attached (I presume the bits I've added at the front you already have).
' Connect to database
Dim ConnectionString As String = "Provider=Microsoft.Jet.OLEDB.4.0; Data Source=c:\\Northwind.mdb"
Dim conn As Connection = New Connection
Dim connMode As Integer = ConnectModeEnum.adModeUnknown
conn.CursorLocation = CursorLocationEnum.adUseServer
conn.Open(ConnectionString, "", "", connMode)
Dim cmdType As Integer = CommandTypeEnum.adCmdText
 
 
Dim sql As String
sql = "select * from [Student_Outcomes] where [OutcomeDate]  = #" & ListView2.SelectedItems.Item(0).SubItems(1).Text & "# And [StudentID] = " & TextBox7.Text
Debug.Print(sql)
' Run query
Dim rs As _Recordset = conn.Execute(sql)
studentnotes.Text = ""
studentnotes.Text = (rs.Fields("OutcomeNotes").Value)
rs.Close()

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Author Comment

by:awolarczuk
ID: 21840093
ok guys i have got it working now thanks so much, how could i have miss that but now i am getting another error that i thought the code i am using should have fixed

{"Either BOF or EOF is True, or the current record has been deleted. Requested operation requires a current record."}

is below
Private Sub ListView2_MouseHover(ByVal sender As Object, ByVal e As System.EventArgs) Handles ListView2.MouseHover
        Dim rs As New ADODB.Recordset
        Dim sql As String
        sql = "select * from [Student_Outcomes] where [OutcomeDate]  = #" & ListView2.SelectedItems.Item(0).SubItems(1).Text & "# And [StudentID] = " & TextBox7.Text
        Debug.Print(sql)
        rs.Open(sql, cnn1, ADODB.CursorTypeEnum.adOpenDynamic, ADODB.LockTypeEnum.adLockPessimistic)
        studentnotes.Text = ""
        If Not DBNull.Value.Equals(rs.Fields("OutcomeNotes").Value) Then
            studentnotes.Text = ""
            studentnotes.Text = rs.Fields("OutcomeNotes").Value
        Else
            studentnotes.Text = "Currently There are no notes to Display for this Student"
            rs.Close()
        End If
 
        rs.Close()
    End Sub

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Author Comment

by:awolarczuk
ID: 21840096
i have also tried it like this
    Private Sub ListView2_MouseHover(ByVal sender As Object, ByVal e As System.EventArgs) Handles ListView2.MouseHover
        Dim rs As New ADODB.Recordset
        Dim sql As String
        sql = "select * from [Student_Outcomes] where [OutcomeDate]  = #" & ListView2.SelectedItems.Item(0).SubItems(1).Text & "# And [StudentID] = " & TextBox7.Text
        Debug.Print(sql)
        rs.Open(sql, cnn1, ADODB.CursorTypeEnum.adOpenDynamic, ADODB.LockTypeEnum.adLockPessimistic)
        studentnotes.Text = ""
        studentnotes.Text = rs.Fields("OutcomeNotes").Value
        rs.Close()
    End Sub
and get a type 'DBNull' to type 'string' is not valid
    Private Sub ListView2_MouseHover(ByVal sender As Object, ByVal e As System.EventArgs) Handles ListView2.MouseHover
        Dim rs As New ADODB.Recordset
        Dim sql As String
        sql = "select * from [Student_Outcomes] where [OutcomeDate]  = #" & ListView2.SelectedItems.Item(0).SubItems(1).Text & "# And [StudentID] = " & TextBox7.Text
        Debug.Print(sql)
        rs.Open(sql, cnn1, ADODB.CursorTypeEnum.adOpenDynamic, ADODB.LockTypeEnum.adLockPessimistic)
        studentnotes.Text = ""
        studentnotes.Text = rs.Fields("OutcomeNotes").Value
        rs.Close()
    End Sub

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LVL 24

Expert Comment

by:purplepomegranite
ID: 21840189
BOF or EOF true basically means that your SQL statement isn't returning any data.

You have a debug statement for the sql.  Please paste the generated SQL here - either there is a problem with your generation of the SQL, or there is actually no data that matches your query.
0
 
LVL 142

Expert Comment

by:Guy Hengel [angelIII / a3]
ID: 21840191
that error means that you got no records back:
  Private Sub ListView2_MouseHover(ByVal sender As Object, ByVal e As System.EventArgs) Handles ListView2.MouseHover
        Dim rs As New ADODB.Recordset
        Dim sql As String
        sql = "select * from [Student_Outcomes] where [OutcomeDate]  = #" & ListView2.SelectedItems.Item(0).SubItems(1).Text & "# And [StudentID] = " & TextBox7.Text
        Debug.Print(sql)
        rs.Open(sql, cnn1, ADODB.CursorTypeEnum.adOpenDynamic, ADODB.LockTypeEnum.adLockReadOnly)
        studentnotes.Text = ""
        if not (rs.eof and rs.bof) then
           studentnotes.Text = rs.Fields("OutcomeNotes").Value
        end if
        rs.Close()
    End Sub

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Author Comment

by:awolarczuk
ID: 21840200
ok mate thanks so much i am more then happy to give you 500 point for the extra help but bnow i am gettting

Conversion from type 'DBNull' to type 'String' is not valid.
on hte same line

any help mate please
0
 
LVL 142

Expert Comment

by:Guy Hengel [angelIII / a3]
ID: 21840209
that means that the value returned could be NULL.
you have 2 options:

* make the NULL value replaced by the query
sql = "select NZ(OutcomeNotes, 'N/A') OutcomeNotes from [Student_Outcomes] where [OutcomeDate]  = #" & ListView2.SelectedItems.Item(0).SubItems(1).Text & "# And [StudentID] = " & TextBox7.Text
 
* handle the NULL value in the .net code
Private Sub ListView2_MouseHover(ByVal sender As Object, ByVal e As System.EventArgs) Handles ListView2.MouseHover
        Dim rs As New ADODB.Recordset
        Dim sql As String
        sql = "select * from [Student_Outcomes] where [OutcomeDate]  = #" & ListView2.SelectedItems.Item(0).SubItems(1).Text & "# And [StudentID] = " & TextBox7.Text
        Debug.Print(sql)
        rs.Open(sql, cnn1, ADODB.CursorTypeEnum.adOpenDynamic, ADODB.LockTypeEnum.adLockReadOnly)
        studentnotes.Text = ""
        if not (rs.eof and rs.bof) then
          if not IsDBNull(rs.Fields("OutcomeNotes").Value)
           studentnotes.Text = rs.Fields("OutcomeNotes").Value
          end if
        end if
        rs.Close()
    End Sub

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Author Comment

by:awolarczuk
ID: 21840253
ok i think the code is working but it is changing all my date back to us format how can i keep them the way they are or state that they are aus format
0
 
LVL 142

Accepted Solution

by:
Guy Hengel [angelIII / a3] earned 500 total points
ID: 21840272
ms access uses the US format for "storing/recognizing" the dates.
for display in another format, you need to format the date value as needed, in access query that could be the Formatdatetime() function:
http://office.microsoft.com/en-us/access/HA012288411033.aspx
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