connection.Open(); DataSet dsa = new DataSet(); DataTable dt = new DataTable(); dsa.Tables.Add(dt); OleDbDataAdapter da = new OleDbDataAdapter(); da = new OleDbDataAdapter("SELECT [User Name] FROM Login where [User Code] = " + comboBox1.Text + " ", connection); da.Fill(dt); //dataGridView1.DataSource = dt; textBox1.Text = dt.Rows[0][0].ToString(); connection.Close();
var
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