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POSELECT UPDATE SQL Not Working
 

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  1. POSELECT UPDATE SQL Not Working
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    <p>I have 2 forms </p> <p>First Form has </p> <pre><code>Public Class frmMain Friend strBillIDNumber As String Friend strBillPassword As String Friend ds As New DataSet Friend cnn As OleDbConnection Friend sql As String Friend adptr As OleDbDataAdapter Dim attempt As Integer = 1 Private Sub btnSign_Click(sender As Object, e As EventArgs) Handles btnSign.Click Dim connectionString As String connectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\Users\Renz\Documents\Visual Studio 2012\FINAL\Database\UsersDB.accdb;" sql = "Select ID, LASTNAME, FIRSTNAME, LOGINSTATUS from TblUser" cnn = New OleDbConnection(connectionString) Try cnn.Open() adptr = New OleDbDataAdapter(sql, cnn) adptr.Fill(ds) For i = 0 To ds.Tables(0).Rows.Count - 1 If ds.Tables(0).Rows(i).Item(0) = txtID.Text Then MessageBox.Show("UserName Matched") If ds.Tables(0).Rows(i).Item(1) = txtPassword.Text Then MessageBox.Show("Password Matched") If txtPassword.Text = "admin" Then MessageBox.Show("You are now Logged In as Admin.") frmFaculty.Show() Me.Hide() Else frmStudent.lblSI.Text = ds.Tables(0).Rows(i).Item(0) frmStudent.lblLN.Text = ds.Tables(0).Rows(i).Item(1) frmStudent.lblFN.Text = ds.Tables(0).Rows(i).Item(2) frmStudent.lblLS.Text = ds.Tables(0).Rows(i).Item(3) MessageBox.Show("You are now Logged In.") frmStudent.Show() Me.Hide() End If Else MessageBox.Show("Invalid Password.") MessageBox.Show("Please Try Again." &amp; vbNewLine &amp; "ATTEMPT: " &amp; attempt &amp; " out of 3") attempt = attempt + 1 End If End If Next adptr.Dispose() cnn.Close() Catch ex As Exception MessageBox.Show("Please Try Again!") End Try 'log-in attempt 3x fail' If attempt &gt; 3 Then MessageBox.Show("You have exceeded the number of login attempt." &amp; vbNewLine &amp; "Please Contact the Administrator.") End If End Sub </code></pre> <p>And my Second Form Has </p> <pre><code>Imports System.Data.OleDb Public Class frmStudent Dim TimeInHold As String Private Sub loginBTN_Click(sender As Object, e As EventArgs) Handles loginBTN.Click Dim cnn2 As New OleDbConnection Dim Command As OleDbCommand Dim i As Integer Dim sql2 As String Dim status As String Try cnn2 = New OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\Users\Renz\Documents\Visual Studio 2012\FINAL\Database\AuditDB.mdb;") cnn2.Open() sql2 = "INSERT INTO Audit ([ID],[TIMEIN]) VALUES('" &amp; frmMain.txtID.Text &amp; "','" &amp; DateTime.Now &amp; "')" Command = New OleDbCommand(sql2, cnn2) i = Command.ExecuteNonQuery Catch ex As Exception cnn2.Close() End Try MessageBox.Show("You have successfully Signed in." &amp; vbNewLine &amp; " Please Don't Forget to Logout.") frmMain.cnn = New OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\Users\Renz\Documents\Visual Studio 2012\FINAL\Database\UsersDB.accdb;") frmMain.cnn.Open() frmMain.adptr = New OleDbDataAdapter(frmMain.sql, frmMain.cnn) frmMain.adptr.Fill(frmMain.ds) If frmMain.ds.Tables(0).Rows(i).Item(0) = lblSI.Text Then frmMain.sql = "UPDATE TblUser SET LOGINSTATUS = 'SignedIn'" frmMain.cnn.Close() End If Me.Close() frmMain.Show() frmMain.txtID.Text = String.Empty frmMain.txtPassword.Text = String.Empty End Sub </code></pre> <p>I can't get my SELECT and UPDATE sql statement to work that will get the data set from form 1. And when the button is clicked, it will update the field "LoginStatus" to a value of "Signed In".</p> <p>P.S. I'm creating a time-in, time-out monitoring system that will determine if the user is an admin or a student and will redirect them to their corresponding forms. Student form will have sign in and sign out buttons, and will record their time in and time out. When sign in is clicked, it will be grayed out.</p> <p>Please Help..</p>
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    1. PO
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      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USmarc_s
    1. USyakks poeka
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
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      1. PTAnswer
    2. PO
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      1. POSELECT UPDATE SQL Not Working
      1. This table or related slice is empty.
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    1. COWhy is this in caps. Please reformat so this is readable
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      1. POSELECT UPDATE SQL Not Working
      1. USHogan
    2. COI made an edit, pending review.
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      1. POSELECT UPDATE SQL Not Working
      1. USps2goat
    3. COYou need to learn about the [`WHERE` clause](http://technet.microsoft.com/en-us/library/ms188047.aspx) - when you're trying to find a matching row in a table, the right way to do that is to ask SQL to find the row. The wrong way to do it is to write `For i = 0 To ds.Tables(0).Rows.Count - 1`. You'll also need (soon) to find out about parameters, but once you've got the hang of the `WHERE` clause, at least your `UPDATE` won't change *every* row in the table.
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      1. POSELECT UPDATE SQL Not Working
      1. USDamien_The_Unbeliever
 

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