Updating row in database using vb.net - vb.net

Question

I am trying to update and save a row of a database table. I have used a version of this code to just populate a GridView and it works, so I am assuming it has something to do with my SQL statment; I do not get an error, the table just does not update. On the page load event I have the textboxes being populated by the information of the row, and I have a global variable, named 'temp', that will save the title of the row so I can use it in the button's click event. The error I am getting states that I have not given a value for one of my required parameters. My Locals tab on the debugger shows that every variable has a value, though the one I try to update is not the new data but still the old data.
I have looked at several examples and I cannot find the problem though. Thank you for any assistance.
Protected Sub btnSave_Click(sender As Object, e As EventArgs)
Dim strTitle As String = txtTitle.Text
Dim strConsole As String = txtConsole.Text
Dim strYear As String= txtYear.Text
Dim strPurchase As String = calDate.SelectedDate.ToString
Using con As OleDbConnection = New OleDbConnection("PROVIDER=Microsoft.ACE.OLEDB.12.0;" + "DATA SOURCE=" + Path.Combine(AppDomain.CurrentDomain.BaseDirectory + "App_Data", "db1.accdb"))
Dim cmd As OleDbCommand = New OleDbCommand()
cmd.CommandText = Convert.ToString("UPDATE Video_Games SET Title = #title, Console = #Console, Year_Released = #Year_Released, Purchase = #Purchase WHERE Title=" & temp)
cmd.Connection = con
cmd.Parameters.AddWithValue("#Title", strTitle)
cmd.Parameters.AddWithValue("#Console", strConsole)
cmd.Parameters.AddWithValue("#Year_Released", strYear)
cmd.Parameters.AddWithValue("#Purchase", strPurchase)
con.Open()
cmd.ExecuteNonQuery()
con.Close()
End Using
Server.Transfer("Form.aspx", True)
End Sub
I have also tried the have my where statement as: WHERE Title='" & temp & "'") Though this does not work either.
This is the details of the Error message

Answer 1

I changed you commandText as seen below and created a blank database with a table named just like yours and the update worked
cmd.CommandText = "UPDATE Video_Games SET Title = #title, Console = #Console, Year_Released = #Year_Released, Purchase = #Purchase WHERE Title='" & temp & "'"
I set my variable for Title = Super Mario Bros and then the temp variable to Wario World. I had a record in my database with the title of Wario World, and running the update changed the title to Super Mario Bros.
Check if you temp variable is different from your #title variable. Also check that you have the record int the table for your temp variable title

Answer 2

Thank you all for your assistance, This is such a wonderful community.
The problem, I found out, does not even have to do with the button's click event, it had to do with the page load event. Since on page load the row's information is loaded and populated into the textboxes, when the button is clicked to update the fields, the page load event triggers again and reloads the old information into fields, essentially saving the old information instead of the new. My fix was to create an If Not IsPostBack Then statement that encapsulates my on page load code. Therefore the code does not get saved when the button is pressed. Another this, I did not need the temp variable, using WHERE Title='" + strTitle + "'" worked. Hopefully this helps other people stuck on a similar problem!

Answer 3

Using dates in a where clause is always ify as they are floating point numbers and may not match equally. I'd try and round them or convert them to strings before comparison, e.g. something along these lines:
UPDATE Video_Games SET Title = #title, Console = #Console, Year_Released = #Year_Released, Format(Purchase, ""m/d/yyyy"") = Format(#Purchase, ""m/d/yyyy"") WHERE Title = #Title