private void button1_Click(object sender, EventArgs e)
        {
            weka.core.Instances insts = new weka.core.Instances(new java.io.FileReader(file));
            double[]            Data  = new double[insts.numAttributes()];
            for (int i = 0; i < list.Count; i++)
            {
                if (list[i].GetType() == typeof(TextBox))
                {
                    TextBox txt   = (TextBox)list[i];
                    string  value = txt.Text.Replace('.', ',');
                    Data[i] = Convert.ToDouble(value);
                }
                else
                {
                    ComboBox combobox = (ComboBox)list[i];
                    Data[i] = Convert.ToDouble(combobox.SelectedIndex);
                }
            }
            // Data[(insts.numAttributes() - 1] = 0;
            insts.setClassIndex(insts.numAttributes() - 1);
            Instance newInsts = new Instance(1.0, Data);

            insts.add(newInsts);
            string type = model.GetType().ToString();

            if (type == "weka.classifiers.bayes.NaiveBayes")
            {
                weka.filters.Filter myDiscretize = new weka.filters.unsupervised.attribute.Discretize();
                myDiscretize.setInputFormat(insts);
                insts = weka.filters.Filter.useFilter(insts, myDiscretize);
            }
            else if (type == "weka.classifiers.lazy.IBk")
            {
                weka.filters.Filter myDummy = new weka.filters.unsupervised.attribute.NominalToBinary();
                myDummy.setInputFormat(insts);
                insts = weka.filters.Filter.useFilter(insts, myDummy);

                weka.filters.Filter myNormalize = new weka.filters.unsupervised.instance.Normalize();
                myNormalize.setInputFormat(insts);
                insts = weka.filters.Filter.useFilter(insts, myNormalize);
            }
            double index = model.classifyInstance(insts.lastInstance());

            string result = insts.attribute(insts.numAttributes() - 1).value(Convert.ToInt16(index));

            MessageBox.Show(result);
        }