VB.NET MySQL致命錯誤但數據庫接受輸入

Question

當我執行此代碼時，我收到一個致命錯誤，但信息仍顯示在數據庫中。任何人都可以在這裏看到錯誤？

sql.RunQuery("INSERT INTO test(test1,test2,test3) values(?FName,?LName,?DOB)") 

      sql.SQLcmd.Parameters.AddWithValue("?FName", Gender.SelectedItem) 
      sql.SQLcmd.Parameters.AddWithValue("?LName", Age) 
      sql.SQLcmd.Parameters.AddWithValue("?DOB", RDIAge) 

      sql.SQLcmd.ExecuteNonQuery() 

Answer 1

你的代碼應該是這樣的：

Dim connString As String = "Database=yourDB;Data Source=localhost;"; 
    connString +="User Id=yourUserDb;Password=dbPass" 

    Dim conn As New MySqlConnection(connString) 
    Dim cmd As New MySqlCommand() 
    Try 
    conn.Open() 
    cmd.Connection = conn 

    cmd.CommandText = "INSERT INTO test(test1,test2,test3) values(@FName,@LName,@DOB)" 
    cmd.Prepare() 

    cmd.Parameters.AddWithValue("@FName", Gender.SelectedItem) 
    cmd.Parameters.AddWithValue("@LName", Age) 
    cmd.Parameters.AddWithValue("@DOB", RDIAge) 
    cmd.ExecuteNonQuery() 

    conn.Close() 

    Catch ex As MySqlException 
     Console.WriteLine("Error: " & ex.ToString()) 
    End Try