如何在vb.net中創建參數化查詢？

Question

將參數化查詢與ms Access 2003集成一起使用。 根據不同的標准搜索任何數據。

Answer 1

您需要使用OleDbConnection類以及OleDbCommand類，並為Access使用正確的連接字符串。

Dim sql as String = "SELECT * FROM TABLE_A WHERE COLUMN_A = @PARAM"
Dim connectionString as String = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\mydatabase.mdb;User Id=admin;Password=;"
Using connection As New OleDbConnection(connectionString)
   Dim command As New OleDbCommand(sql)
   command.Connection = connection
   command.Params.Add("@PARAM", yourVariable)
   connection.Open()
    Dim reader As OleDbDataReader = command.ExecuteReader()
    While reader.Read()
        Console.WriteLine(reader.GetString(1)
    End While
End Using

Answer 2

您可能會發現這很有幫助： Howto？ 參數和LIKE語句SQL