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我正在創建一個WPF應用程序，該應用程序根據模型生成一個表單來編輯它。我使用反射通過模型的所有屬性爲屬性創建輸入域。 GenerateForm方法遍歷屬性並使用SimpleInputFactory生成輸入字段。我想驗證生成的字段的輸入，但所有驗證方法都要求您知道要驗證的內容（無論是使用泛型還是必須在XAML中的綁定中指定它）。我想根據模型中的屬性驗證輸入。有沒有現有的方法來做到這一點？我可以自己做，但如果有一些現有的方式，它會有所幫助。WPF驗證運行時生成表格
在此先感謝。
public static Grid GenerateForm(List<object> basisgegevensModels, AddOrEdit addOrEdit)
{
if (basisgegevensModels.Count <= 0)
return null;
Grid formGrid = new Grid();
formGrid.Margin = new Thickness(20,20,20,20);
formGrid.HorizontalAlignment = HorizontalAlignment.Stretch;
AddColumnToGrid(formGrid, GridUnitType.Star, 1);
AddColumnToGrid(formGrid, GridUnitType.Star, 3);
AddColumnToGrid(formGrid, GridUnitType.Star, 1);
AddColumnToGrid(formGrid, GridUnitType.Star, 3);
AddRowToGrid(formGrid, GridUnitType.Auto, 0);
var propertyInfos = new List<PropertyInfo>();
foreach (var propertyInfo in basisgegevensModels[0].GetType().GetProperties(BindingFlags.DeclaredOnly | BindingFlags.Public | BindingFlags.Instance))
{
var visibleAttribute = propertyInfo.GetCustomAttributes(typeof(Visible), false).Cast<Visible>().FirstOrDefault();
if (visibleAttribute == null || visibleAttribute.IsVisible)
propertyInfos.Add(propertyInfo);
}
int column = 0;
int row = 0;
foreach (var property in propertyInfos)
{
if (row >= Math.Ceiling((decimal)propertyInfos.Count/2) && row != 0 && column != 2)
{
column = 2;
row = 0;
}
var displayNameAttribute = basisgegevensModels[0].GetType().GetProperty(property.Name).GetCustomAttributes(typeof(DisplayNameAttribute), false)
.Cast<DisplayNameAttribute>().FirstOrDefault();
string displayName;
if (displayNameAttribute != null)
displayName = displayNameAttribute.DisplayName;
else
displayName = property.Name;
bool isEditAllowed = true;
if (addOrEdit == AddOrEdit.Edit)
{
var editAllowed =
basisgegevensModels[0].GetType()
.GetProperty(property.Name)
.GetCustomAttributes(typeof (EditAllowed), false)
.Cast<EditAllowed>()
.FirstOrDefault();
if (editAllowed != null)
isEditAllowed = editAllowed.IsEditAllowed;
}
//add label for inputfield
TextBlock label = SimpleInputFieldFactory.CreateTextBlock(displayName, column, row);
label.VerticalAlignment = VerticalAlignment.Center;
formGrid.Children.Add(label);
column++;
//add input field
formGrid.Children.Add(SimpleInputFieldFactory.CreateInputField(basisgegevensModels, property, isEditAllowed, column, row, 300, HorizontalAlignment.Left));
column--;
row++;
if (column == 0)
{
AddRowToGrid(formGrid, GridUnitType.Auto, 0);
}
}
return formGrid;
}
SimpleInputFieldFactory類：
public class SimpleInputFieldFactory
{
public static Control CreateInputField(List<object> basisgegevensModels, PropertyInfo property, bool editAllowed, int column, int row, double inputFieldWidth, HorizontalAlignment inputFieldHorAlignment)
{
Control inputField = null;
var triggers = new List<System.Windows.Interactivity.EventTrigger>();
var multiBinding = new MultiBinding();
multiBinding.NotifyOnSourceUpdated = true;
multiBinding.Mode = BindingMode.TwoWay;
multiBinding.UpdateSourceTrigger = UpdateSourceTrigger.PropertyChanged;
foreach (var basisgegevensModel in basisgegevensModels)
{
Binding binding = new Binding(property.Name)
{
UpdateSourceTrigger = UpdateSourceTrigger.PropertyChanged,
Source = basisgegevensModel,
Mode = BindingMode.TwoWay
};
multiBinding.Bindings.Add(binding);
}
//add inputfield
if (property.PropertyType == typeof(string) || property.PropertyType == typeof(int))
{
string valueAsString = "";
if (property.GetValue(basisgegevensModels[0]) != null)
valueAsString = property.GetValue(basisgegevensModels[0]).ToString();
inputField = CreateTextBox(valueAsString, column, row);
triggers.Add(new System.Windows.Interactivity.EventTrigger("EditValueChanged"));
}
else if (property.PropertyType == typeof(bool))
{
bool valueAsBool = false;
if (property.GetValue(basisgegevensModels[0]) != null)
valueAsBool = (bool)property.GetValue(basisgegevensModels[0]);
inputField = CreateCheckBox(valueAsBool, column, row);
triggers.Add(new System.Windows.Interactivity.EventTrigger("EditValueChanged"));
}
else if (property.PropertyType.BaseType == typeof(Enum))
{
int valueAsInt = 0;
if (property.GetValue(basisgegevensModels[0]) != null)
valueAsInt = (int)property.GetValue(basisgegevensModels[0]);
inputField = CreateDropDown(property.PropertyType, valueAsInt, column, row);
triggers.Add(new System.Windows.Interactivity.EventTrigger("EditValueChanged"));
((ComboBoxEdit)inputField).SelectedIndex = valueAsInt;
((ComboBoxEdit)inputField).IsTextEditable = false;
}
//add general settings, bindings and triggers
if (inputField != null)
{
inputField.Width = inputFieldWidth;
inputField.HorizontalAlignment = inputFieldHorAlignment;
inputField.Margin = new Thickness(5);
inputField.IsEnabled = editAllowed;
var multiEditAllowedAttribute = property.GetCustomAttributes(typeof(MultiEditAllowed), false)
.Cast<MultiEditAllowed>().FirstOrDefault();
//only add binding and trigger if 1 entity is selected OR multiedit is allowed
if (basisgegevensModels.Count == 1 || multiEditAllowedAttribute == null || multiEditAllowedAttribute.IsMultiEditAllowed)
{
multiBinding.Converter = new MultiEditValueConverter();
inputField.SetBinding(BaseEdit.EditValueProperty, multiBinding);
foreach (var trigger in triggers)
{
var action = new ActionMessage();
action.MethodName = "InputChanged";
trigger.Actions.Add(action);
Interaction.GetTriggers(inputField).Add(trigger);
}
}
else
{
inputField.IsEnabled = false;
}
return inputField;
}
return null;
}
public static List<string> GetEnumList(Type enumType)
{
if (!enumType.IsEnum)
{
return new List<string>();
}
return Enum.GetNames(enumType).ToList();
}
public static TextBlock CreateTextBlock(string text, int column, int row)
{
TextBlock textBlock = new TextBlock();
textBlock.Text = text;
Grid.SetColumn(textBlock, column);
Grid.SetRow(textBlock, row);
return textBlock;
}
private static TextEditBase CreateTextBox(string text, int column, int row)
{
TextEdit textBox = new TextEdit();
textBox.Text = text;
Grid.SetColumn(textBox, column);
Grid.SetRow(textBox, row);
return textBox;
}
private static CheckEdit CreateCheckBox(bool isChecked, int column, int row)
{
CheckEdit checkBox = new CheckEdit();
checkBox.IsChecked = isChecked;
Grid.SetColumn(checkBox, column);
Grid.SetRow(checkBox, row);
return checkBox;
}
private static ComboBoxEdit CreateDropDown(Type enumType, int value, int column, int row)
{
ComboBoxEdit dropDown = new ComboBoxEdit();
foreach (var enumValue in GetEnumList(enumType))
{
dropDown.Items.Add(enumValue);
}
dropDown.SelectedIndex = value;
Grid.SetColumn(dropDown, column);
Grid.SetRow(dropDown, row);
return dropDown;
}
}
謝謝，這工作！應該已經注意到了一個。 –