How to filter datagrid using textbox

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Dim connection As OleDb.OleDbConnection = New OleDbConnection
       connection.ConnectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" & System.Environment.CurrentDirectory & "\InventSystem.accdb"
       connection.Open()
       Dim da As OleDb.OleDbDataAdapter = New OleDbDataAdapter("SELECT * FROM Items WHERE Barcode Like  '%" & TextBox1.Text & "%' ", connection)
       Dim ds As New DataTable
       da.Fill(ds)
       If ds.Rows.Count = 0 Then
           MessageBox.Show("Record not Found")
       End If
       connection.Dispose()

What I have tried:

I'm really new to this. Can you guys help me i feel like there is missing on my code to filter the datagrid

Posted 24-Feb-17 6:07am

CaptainChizni

Updated 26-Feb-17 3:58am

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Comments

Richard Deeming 24-Feb-17 12:15pm

Your code is vulnerable to SQL Injection[^]. NEVER use string concatenation to build a SQL query. ALWAYS use a parameterized query.

Everything you wanted to know about SQL injection (but were afraid to ask) | Troy Hunt[^]
How can I explain SQL injection without technical jargon? | Information Security Stack Exchange[^]
Query Parameterization Cheat Sheet | OWASP[^]

Using connection As New OleDb.OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=|AppData|\InventSystem.accdb")
    Dim da As New OleDb.OleDbDataAdapter("SELECT * FROM Items WHERE Barcode Like '%' + @find + '%'", connection)
    da.SelectCommand.Parameters.AddWithValue("@find", TextBox1.Text)
    
    Dim table As New DataTable()
    da.Fill(table)
    
    If table.Rows.Count = 0 Then
        MessageBox.Show("Record not found")
    Else
        ' TODO: Show the returned rows somewhere...
    End If
End Using

Richard Deeming 24-Feb-17 12:15pm

Beyond that, you haven't actually told us what the problem is.

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Maciej Los · Answer 1 · 2017-02-26T03:58:00

I'd suggest to use Google[^].

As Richard Deeming[^] mentioned you have to use parameterized query (OleDbCommand[^]), for example:

VB.NET

Dim qry As String = "SELECT * FROM Items WHERE Barcode Like '*@find*';"

Note: MS Access database engine is using [*] instead of [%]. Please see: Like Operator (Microsoft Access SQL) [Access 2007 Developer Reference][^]