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Updating access database in vb net

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Message) End Try End Sub Arithmetic Operators in Visual Basic . NETConditional and Logical Operators in Visual Basic . NETLogin Tutorial Using Access Database - Visual Basic . NET to My Sql Database Read (Lookup) records from Access Database - Visual Basic . NET Placing Controls on Form Hangman Tutorial - Page 1 - Visual Basic . NETVisual Basic Tutorials Simple Login Tutorial - Visual Basic .In this tutorial, we will update records in Access Database. In this tutorial I create a table with the following fields: I created the following form: Add the following code before the (Public Class Form1) line: Private Sub Save Button_Click(By Val sender As System. Text = asd Dim username As String = "jianda" Dim pwd As String = "jiandapass" Dim SID As String = "tester" Username And Pwd Are Valid(username, pwd, SID) Response. ") End Sub Private Sub Username And Pwd Are Valid(By Val username As String, By Val pwd As String, By Val SID As String) Dim sql Str As String = "SELECT COUNT(*) AS NUMBEROFROWS FROM Credential WHERE [Username] = '" username "' AND [Password] = '" pwd "'" Dim cmd As New Ole Db Command(sql Str, cnn) Dim data Reader As Ole Db Data Reader Trace. Close() Dim online As String = "online" sql Str = "UPDATE Credential SET [Login Flag]='" online "', [Session ID]='" SID "' WHERE [Username]='" username "'" Trace. Execute Non Query() End If Catch ex As Exception Finally If Not cnn Is Nothing Then cnn. Dispose() End If End Try End Sub End Class If this comes from a book, I strongly advice you to buy another one....

NETDisplaying Data in a Chart / Graph - Visual Basic . NETVisual Basic Tutorials Allow Numbers only in a Text Box - Visual Basic . Dim changes As Data Table Try Dim cmdbuilder As Ole Db Command Builder = New Ole Db Command Builder(Data Adapter) cmdbuilder. Update(Data Table) ' use your update statement or the following two statements changes = Data Table. Get Changes() If changes Is Not Nothing Then Data Adapter. I need to do all of this, before save it into the data base. " id="ctl00_m_m_i_ctl00_gr_ctl13_bestanswerbody" class="textarea-bestanswerhidden" name="bestanswerbody" answerbody Id="5368086" / Hmm, so what other choices I have? I am doing all these steps at the same time, but when I try to update my database, it is not happening. When the click event on the button save happens, I do this. Update(Data Table) and I know that I am missing something. Try this with your Data Table and Data Adapter: (untested) Dim changes As Data Table Try Dim cmdbuilder As Ole Db Command Builder = New Ole Db Command Builder(Data Adapter) cmdbuilder. Update(Data Table) ' use your update statement or the following two statements changes = Data Table. In this case I added, deleted, and modified a list of books wrote on a paper. Simply use Execute Scalar (see an example in the link above) And the darareader is obly close when counter is 1. By concatenating the SQL string, your code is vulnarable to SQL injections. NET-with-MS-Access Also, to get one value of one record in a select statement, it is an overkill to use a datareader. Ole Db Public Class Authentication Inherits System. the code is intended for authenticate and authorize users. Perhaps this: Hi, 1) Get rid of the empty catch clause: if an exception happens you are ignoring it which make basically impossible to debug your app.