/// <summary>
/// Applies the settings from the custom attributes to the control.
/// </summary>
/// <param name="ctrl">A control bound to property</param>
/// <param name="attributes">Custom attributes for the property</param>
/// <returns></returns>
private Control ApplyAttributes(Control ctrl, object[] attributes)
{
ControlTag tag = (ControlTag)ctrl.Tag;
NumericSettingsAttribute attrRange = null;
DisplaySettingsAttribute attrDisplay = null;
RequiredFieldAttribute attrRequired = null;
foreach (object attribute in attributes)
{
if (attribute is NumericSettingsAttribute)
{
attrRange = (NumericSettingsAttribute)attribute;
}
else if (attribute is DisplaySettingsAttribute)
{
attrDisplay = (DisplaySettingsAttribute)attribute;
}
else if (attribute is RequiredFieldAttribute)
{
attrRequired = (RequiredFieldAttribute)attribute;
}
}
// Attach LostFocus handler for input validation
ctrl.LostFocus += ctrl_LostFocus;
// Range Attribute
if (attrRange != null)
{
// todo
}
// Display Attribute
if (attrDisplay != null)
{
tag.CustomLabel = attrDisplay.Label;
ctrl.Enabled = !attrDisplay.ReadOnly;
ctrl.Visible = attrDisplay.Visible;
if (attrDisplay.Width > 0)
{
ctrl.Width = attrDisplay.Width;
}
}
// Required Field Attribute
if (attrRequired != null)
{
if (string.IsNullOrEmpty(attrRequired.Message))
{
tag.ErrorMessage = "Required";
}
else
{
tag.ErrorMessage = attrRequired.Message;
}
}
return(ctrl);
}
private void InitializeControls(object item)
{
PropertyInfo[] properties = item.GetType().GetProperties();
// Create layout table
this.tableLayoutPanel1.RowCount = properties.Length;
// For each property
int rowNumber = 0;
foreach (var property in properties)
{
Control ctrl = ControlFactory.CreateControl(item, property);
if (ctrl != null)
{
// Get custom attributes
object[] attributes = property.GetCustomAttributes(true);
ctrl = ApplyAttributes(ctrl, attributes);
// Disable the control if property read only
if (!property.CanWrite)
{
ctrl.Enabled = false;
}
// Set the tab index
//ctrl.TabIndex = controls.Count + 1;
// Build label
if (ctrl.Visible)
{
ControlTag tag = (ControlTag)ctrl.Tag;
Label label = ControlFactory.CreateLabel(property.Name);
if (!string.IsNullOrEmpty(tag.CustomLabel))
{
label.Text = tag.CustomLabel;
}
tableLayoutPanel1.Controls.Add(label, 0, rowNumber);
tableLayoutPanel1.Controls.Add(ctrl, 1, rowNumber);
controls.Add(ctrl);
}
}
rowNumber++;
}
// Resize the form
this.Width = tableLayoutPanel1.Width + 40;
this.Height = tableLayoutPanel1.Height + 90;
}
/// <summary>
/// Saves the controls value back to the data object.
/// </summary>
private void SaveControlValues()
{
// For each TextBox, Dropdown etc...
foreach (Control c in controls)
{
ControlTag tag = (ControlTag)c.Tag;
PropertyInfo property = DataItem.GetType().GetProperty(tag.PropertyName);
Type type = property.PropertyType;
if (c is TextBox)
{
TextBox textbox = (TextBox)c;
if (type == typeof(string))
{
property.SetValue(DataItem, textbox.Text, null);
}
else if (type == typeof(char))
{
property.SetValue(DataItem, Convert.ToChar(textbox.Text), null);
}
}
else if (c is NumericUpDown)
{
NumericUpDown numeric = (NumericUpDown)c;
if (type == typeof(int))
{
property.SetValue(DataItem, Convert.ToInt32(numeric.Value), null);
}
else if (type == typeof(decimal))
{
property.SetValue(DataItem, Convert.ToDecimal(numeric.Value), null);
}
}
else if (c is CheckBox)
{
CheckBox checkbox = c as CheckBox;
property.SetValue(DataItem, checkbox.Checked, null);
}
else if (c is ComboBox)
{
ComboBox dropdown = c as ComboBox;
property.SetValue(DataItem, Enum.Parse(tag.PropertyType, Convert.ToString(dropdown.SelectedItem)), null);
}
else if (c is FileBrowserButton)
{
FileBrowserButton button = c as FileBrowserButton;
property.SetValue(DataItem, new FileInfo(button.FilePath.Text), null);
}
}
}
private bool ValidateControl(Control control)
{
bool isValid = true;
// Validation currently limited to TextBoxes only
TextBox txt = control as TextBox;
if (txt != null)
{
// If the textbox is empty, show a warning
ControlTag tag = (ControlTag)txt.Tag;
if (tag.IsRequired && string.IsNullOrEmpty(txt.Text))
{
errorProvider.SetError(txt, tag.ErrorMessage);
isValid = false;
}
else
{
errorProvider.SetError(txt, string.Empty);
}
}
return(isValid);
}
internal static Control CreateControl(object item, PropertyInfo property)
{
Control ctrl = null;
Type type = property.PropertyType;
// The control depends on the property type
if (type == typeof(string))
{
ctrl = new TextBox();
TextBox textbox = ctrl as TextBox;
textbox.Text = (string)property.GetValue(item, null);
textbox.Margin = new Padding(3, 3, 16, 0);
}
else if (type == typeof(char))
{
ctrl = new TextBox();
TextBox textbox = ctrl as TextBox;
textbox.MaxLength = 1;
textbox.Width = 20;
textbox.Text = Convert.ToString(property.GetValue(item, null));
textbox.Margin = new Padding(3, 3, 16, 0);
}
else if (type == typeof(int))
{
ctrl = new NumericUpDown();
NumericUpDown numeric = ctrl as NumericUpDown;
numeric.Value = Convert.ToDecimal(property.GetValue(item, null));
}
else if (type == typeof(decimal))
{
ctrl = new NumericUpDown();
NumericUpDown numeric = ctrl as NumericUpDown;
numeric.DecimalPlaces = 2;
numeric.Value = Convert.ToDecimal(property.GetValue(item, null));
}
else if (type == typeof(bool))
{
ctrl = new CheckBox();
CheckBox checkbox = ctrl as CheckBox;
checkbox.Checked = Convert.ToBoolean(property.GetValue(item, null));
}
else if (type.BaseType == typeof(Enum))
{
ctrl = new ComboBox();
ComboBox dropdown = ctrl as ComboBox;
dropdown.DropDownStyle = ComboBoxStyle.DropDownList;
string[] names = Enum.GetNames(type);
string value = Convert.ToString(property.GetValue(item, null));
foreach (var name in names)
{
dropdown.Items.Add(name);
if (name == value)
{
dropdown.SelectedIndex = dropdown.Items.Count - 1;
}
}
}
else if (type == typeof(DateTime))
{
ctrl = new DateTimePicker();
DateTimePicker date = ctrl as DateTimePicker;
DateTime dateValue = Convert.ToDateTime(property.GetValue(item, null));
if (dateValue < date.MinDate)
{
dateValue = date.MinDate;
}
if (dateValue > date.MaxDate)
{
dateValue = date.MaxDate;
}
date.Value = dateValue;
}
else if (type == typeof(FileInfo))
{
ctrl = new FileBrowserButton();
FileBrowserButton button = ctrl as FileBrowserButton;
button.FilePath.Text = (string)property.GetValue(item, null);
}
if (ctrl != null)
{
ControlTag tag = new ControlTag();
tag.PropertyName = property.Name;
tag.PropertyType = property.PropertyType;
ctrl.Tag = tag;
}
return(ctrl);
}
