public override object ProvideValue(IServiceProvider serviceProvider)
{
bool ignoreIsNull = IgnoreValue == null;
bool defaultIsNull = DefaultValue == null;
bool configItemIsNull = ConfigManager[Key] == null;
//Prevent Default = Ignore
if (!ignoreIsNull && !defaultIsNull && IgnoreValue.Equals(DefaultValue))
{
throw new Exception("IgnoreValue must not be equal DefaultValue");
}
// If ConfigurationItem does not exist, Set to Default
if (configItemIsNull)
{
ConfigManager[Key] = new ConfigurationItem(Key, DefaultValue);
}
// If Ignore != null, ConfigurationItem Exists, and ConfigurationItem Value == Ignore, Set to Default
else if (!ignoreIsNull && ConfigManager[Key].Value.Equals(IgnoreValue))
{
ConfigManager[Key] = new ConfigurationItem(Key, DefaultValue);
}
Binding binding = new Binding
{
Source = ConfigManager,
Path = new PropertyPath(string.Format("[{0}].Value", Key)),
Mode = BindingMode.TwoWay,
};
return(binding.ProvideValue(serviceProvider));
}
/// <summary>
/// 附加复选项目列表，文本/值。
/// </summary>
/// <param name="items">复选框项目列表实例。</param>
protected override void Init(IDictionary <string, object?> items)
{
Type?type = null;
if (For != null && For.Model is IEnumerable array)
{
type = For.ModelExplorer.ModelType.GetElementType();
Value = array.OfType <Enum>().ToArray();
}
else if (IgnoreValue != null)
{
type = IgnoreValue.GetType();
}
else if (IgnoreValues != null)
{
type = IgnoreValues.First().GetType();
}
else if (Value is not null)
{
type = Value.First().GetType();
}
if (type != null)
{
Init(items, type);
}
else
{
throw new Exception(Resources.EnumDropdownListTagHelper_TypeNotFound);
}
}
/// <summary>
/// 附加复选项目列表，文本/值。
/// </summary>
/// <param name="items">复选框项目列表实例。</param>
protected override void Init(IDictionary <string, object?> items)
{
if (For != null)
{
Init(items, For.ModelExplorer.ModelType);
Value = For.Model as Enum;
}
else if (IgnoreValue != null)
{
Init(items, IgnoreValue.GetType());
}
else if (Value is Enum value)
{
Init(items, value.GetType());
}
else
{
throw new Exception(Resources.EnumDropdownListTagHelper_TypeNotFound);
}
}
public virtual string GetPropertyValue(PropertyInfo property, object obj)
{
object propertyValue = property.GetValue(obj);
string propertyString = propertyValue.ToString();
if (!string.IsNullOrEmpty(FormatString))
{
propertyString = string.Format("{0:" + FormatString + "}", propertyValue);
}
if (IgnoreValue != null && IgnoreValue.Equals(propertyValue))
{
return(string.Empty);
}
if (Uppercase)
{
propertyString = propertyString.ToUpper();
}
return(propertyString);
}
