Problem converting data from SQL to a variable in VB.NET

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(Sorry for my bad english)
I want to convert a data extracted from SQL server (For example a INT), and Print that with a MsgBox in VB.NET
For example, in a Table I had the column Age, I Selected just the Age of one person, and I want to convert that to an Variable that I Dim in VB...
Maybe if you see what I tried you understand what I want
Thanks!

What I have tried:

Dim da As New OleDbDataAdapter("SELECT rank FROM Clientes WHERE user='" & TextBox1.Text & "' AND password='" & TextBox2.Text & "';", cn)
        Dim ds As New DataSet

        da.Fill(ds, "Clientes")

        With DataGridView1
            .DataSource = ds.Tables("Clientes")
            .Refresh()
        End With

        MsgBox(Convert.ToInt16(da)) 'HERE I WANT TO PRINT THE RESULT OF THE SELECT

Posted 6-May-17 8:00am

Member 13178411

Updated 6-May-17 8:15am

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OriginalGriff · Accepted Answer · 2017-05-06T08:15:00

Solution 1

Assuming the query is meant to return a single value - and if it doesn't, you need to change it so it does - then don't use a data adapter at all.
Instead, use an OleDbCommand, and call ExecuteScalar: OleDbCommand.ExecuteScalar Method (System.Data.OleDb)[^] - it returns the single value directly, and you can just cast it to a number and do what you want with it.

Posted 6-May-17 8:15am

OriginalGriff

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Member 13178411 6-May-17 14:45pm

Thanks!
That Works :D

OriginalGriff 6-May-17 15:49pm

You're welcome!