private void CreateFieldsFromDataset()
{
// Prevent running if we don't have a tree to analyze
if (tree == null)
{
return;
}
FlowLayoutPanel panel = fieldsPanel;
Dataset dataset = tree.Dataset;
features = new Row(Enumerable.Repeat <Feature>(null, tree.Dataset.MaxFeatureCount).ToList());
// Suspend the layout to prevent re-renders
panel.SuspendLayout();
// Clear the panel before removing any previous text box
panel.Controls.Clear();
// Initialize the List in which we'll save every control to add
List <Control> controls = new List <Control>();
int totalFeatures = dataset.MaxFeatureCount;
// Create a field for each feature
for (int i = 0; i < totalFeatures; ++i)
{
int staticIndex = i;
// Create the Label for this field
Label label = new Label();
label.Text = dataset.Headers[i].FirstCharToUpper();
label.Margin = new Padding(7, 7, 3, 0);
label.AutoSize = true;
controls.Add(label);
// We need different Control types for categorical and numeric features
if (dataset.IsNumeric(i))
{
// Create a NumericUpDown for numeric features
NumericUpDown numericUpDown = new NumericUpDown();
numericUpDown.Minimum = decimal.MinValue;
numericUpDown.Maximum = decimal.MaxValue;
numericUpDown.DecimalPlaces = 2;
numericUpDown.TabStop = true;
numericUpDown.TabIndex = 0;
numericUpDown.Margin = new Padding(10, 3, 3, 3);
// Initialize this feature in 0
features[i] = new Feature(0);
// Set the Event Handler
numericUpDown.ValueChanged += new EventHandler((object sender, EventArgs e) => {
NumericUpDown control = sender as NumericUpDown;
if (features != null)
{
features[staticIndex] = new Feature(control.Value);
}
predictionBtn.Enabled = IsValidPredictionRow(features);
});
panel.SetFlowBreak(numericUpDown, true);
controls.Add(numericUpDown);
}
else
{
// Create the ComboBox for categoric features
ComboBox comboBox = new ComboBox();
comboBox.AutoCompleteMode = AutoCompleteMode.Append;
comboBox.AutoCompleteSource = AutoCompleteSource.ListItems;
comboBox.DropDownStyle = ComboBoxStyle.DropDownList;
comboBox.FormattingEnabled = true;
comboBox.TabStop = true;
comboBox.TabIndex = 0;
comboBox.Margin = new Padding(10, 3, 3, 3);
// Set the Event Handler
comboBox.SelectionChangeCommitted += new EventHandler((object sender, EventArgs e) => {
ComboBox control = sender as ComboBox;
if (features != null && control.SelectedItem != null)
{
features[staticIndex] = new Feature(control.SelectedItem.ToString());
}
predictionBtn.Enabled = IsValidPredictionRow(features);
});
// Get all the unique values for this ComboBox
HashSet <Feature> uniqueFeatures = dataset.GetUniqueValues(i);
string[] values = uniqueFeatures.Select(item => item.ToString()).ToArray();
comboBox.Items.AddRange(values);
panel.SetFlowBreak(comboBox, true);
controls.Add(comboBox);
}
}
// Assign the Enabled property for the Button with the current Row
predictionBtn.Enabled = IsValidPredictionRow(features);
// Display every new control in the UI
panel.Controls.AddRange(controls.ToArray());
// Re-render panels
panel.ResumeLayout(false);
panel.PerformLayout();
}
private static bool IsValidPredictionRow(Row row) => row != null && row.All(item => item != null);