Reading multi-rows of data into the same textbox with datareader.

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I can't figure out what I am doing wrong. I am trying to read multiple rows of data into the same textbox. I am using a Datareader. let me explain what I am trying to do.

I am creating a customer notes/comments section in my application. I want to store notes/comments about customer service conversation. I am storing them with the date & time the comment was added. This is stored in a Access database. I want to retrieve the data and display it on a winform. I have choosen a multi-line textbox. I can get the data to display in the textbox but it only displays the last record of a customer that has multiple records.

I'm not sure if it is possible, is there a better way or what am I missing.

What I have tried:

CustomerNotes table:

CusNumber Date/Time Comment
1350 3/29/2019 8:52:42 AM Customer is wanting a refund.
1376 8/23/2018 10:52:42 PM They were not happy with the product.
1350 4/4/2019 2:43:11 PM We issued a refund.

Textbox result that I want:

3/29/2019 8:52:42 AM
Customer is wanting a refund.

4/4/2019 2:43:11 PM
We issued a refund.

My code:

VB

Try
            Dim command = New OleDb.OleDbCommand
            Call connection()
            Dim drCustomerNotes As OleDbDataReader = Nothing

            With cm
                .Connection = con
                .CommandText = "SELECT * FROM tblCusNotes WHERE fldCusNotesAcctNo = @CusAcctNo"
                Try
                    .Parameters.Clear()
                    .Parameters.Add("@CusAcctNo", OleDbType.Integer).Value = tbCusAcctNo.Text
                Catch ex As Exception
                    MsgBox(ex.Message, MsgBoxStyle.Critical)
                End Try
                drCustomerNotes = .ExecuteReader
            End With
            While drCustomerNotes.Read()

                CusNotesTemp = drCustomerNotes("fldCusNotesDateEntered").ToString
                    CusNotesTemp = CusNotesTemp + vbCrLf + drCustomerNotes("fldCusNotesText").ToString + vbCrLf
                tbCusNotes.Text = CusNotesTemp
                CusNotesfound = True
                End While

            'If CusNotesfound = True Then MsgBox("Cus Notes Info Found.", MsgBoxStyle.Information)
            If CusNotesfound = False Then MsgBox("Cus Notes Info Not Found.", MsgBoxStyle.Information)
            drCustomerNotes.Close()

Textbox result that I get with the above code:

4/4/2019 2:43:11 PM
We issued a refund.

Posted 3-May-19 14:57pm

bgcwaterman

Updated 3-May-19 18:36pm

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Comments

[no name] 3-May-19 22:27pm

tbCusNotes.Text = CusNotesTemp

You're not concatenating the textbox Text. Clear it at the start of the rdr loop; concatenate in the inner loop.

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Bryian Tan · Accepted Answer · 2019-05-03T18:37:00

Maybe something like below? Move the textbox outside the loop, concatenating the string inside the loop, then bind it to the textbox

VB

CusNotesTemp = ""
While drCustomerNotes.Read()

       ' CusNotesTemp = drCustomerNotes("fldCusNotesDateEntered").ToString
            CusNotesTemp = CusNotesTemp + drCustomerNotes("fldCusNotesDateEntered").ToString + vbCrLf + drCustomerNotes("fldCusNotesText").ToString + vbCrLf
       ' tbCusNotes.Text = CusNotesTemp
        CusNotesfound = True
        End While

tbCusNotes.Text = CusNotesTemp

You can also try concatenate the string with StringBuilder class.
Using the StringBuilder Class in .NET | Microsoft Docs[^]