Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
Dim insertOk As Boolean = True
Dim con1 As Ol
Use question (?) placeholder instead of named parameters because you're using System.Data.OleDb
. I'd suggest to download ODP.NET - Oracle Data Provider for .NET.
For instance,
query = "insert into APPLICANTS(APPLICANT_ID,FIRST_NAME) values(?,?)"
cmd.Parameters.Add("?", OleDb.OleDbType.VarChar,30).Value = TextBox7.Text
cmd.Parameters.Add("?", OleDb.OleDbType.LongVarChar,40).Value = TextBox1.Text
....