public CustomPropertyDescriptor CreateProperty(string name, Type type, object value, int index, params Attribute[] attributes)
{
var cpd = new CustomPropertyDescriptor(instance, name, type, value, attributes);
if (index == -1)
{
propertyDescriptorList.Add(cpd);
}
else
{
propertyDescriptorList.Insert(index, cpd);
}
TypeDescriptor.Refresh(instance);
return(cpd);
}
public override sealed PropertyDescriptorCollection GetProperties()
{
if (propertyDescriptorList.Count == 0)
{
var pdc = base.GetProperties(); // this gives us a readonly collection, no good
foreach (PropertyDescriptor pd in pdc)
{
if (!(pd is CustomPropertyDescriptor))
{
var cpd = new CustomPropertyDescriptor(base.GetPropertyOwner(pd), pd);
propertyDescriptorList.Add(cpd);
}
}
}
var pdl = propertyDescriptorList.FindAll(pd => pd != null);
PreProcess(pdl);
var pdcReturn = new PropertyDescriptorCollection(propertyDescriptorList.ToArray());
return(pdcReturn);
}
private void UpdateEnumDisplayText(CustomPropertyDescriptor cpd)
{
if (!(cpd.PropertyType.IsEnum || cpd.PropertyType == typeof(bool)))
{
return;
}
if ((cpd.PropertyFlags & PropertyFlags.LocalizeEnumerations) <= 0)
{
return;
}
string prefix = String.Empty;
ResourceManager rm = null;
StandardValueAttribute sva = null;
sva = cpd.StandardValues.FirstOrDefault() as StandardValueAttribute;
// first try property itself
if (cpd.ResourceManager != null)
{
string keyName = cpd.KeyPrefix + cpd.Name + "_" + sva.Value.ToString() + "_Name";
string valueName = cpd.ResourceManager.GetString(keyName);
if (!String.IsNullOrEmpty(valueName))
{
rm = cpd.ResourceManager;
prefix = cpd.KeyPrefix + cpd.Name;
}
}
// now try class level
if (rm == null && cpd.ResourceManager != null)
{
string keyName = cpd.KeyPrefix + cpd.PropertyType.Name + "_" + sva.Value.ToString() + "_Name";
string valueName = cpd.ResourceManager.GetString(keyName);
if (!String.IsNullOrEmpty(valueName))
{
rm = cpd.ResourceManager;
prefix = cpd.KeyPrefix + cpd.PropertyType.Name;
}
}
// try the enum itself if still null
if (rm == null && cpd.PropertyType.IsEnum)
{
var attr = (EnumResourceAttribute)cpd.AllAttributes.FirstOrDefault(a => a is EnumResourceAttribute);
if (attr != null)
{
try
{
if (String.IsNullOrEmpty(attr.AssemblyFullName) == false)
{
rm = new ResourceManager(attr.BaseName, Assembly.ReflectionOnlyLoad(attr.AssemblyFullName));
}
else
{
rm = new ResourceManager(attr.BaseName, cpd.PropertyType.Assembly);
}
prefix = attr.KeyPrefix + cpd.PropertyType.Name;
}
catch (Exception)
{
return;
}
}
}
if (rm != null)
{
foreach (StandardValueAttribute sv in cpd.StandardValues)
{
string keyName = prefix + "_" + sv.Value.ToString() + "_Name"; // display name
string keyDesc = prefix + "_" + sv.Value.ToString() + "_Desc"; // description
string dispName = String.Empty;
string description = String.Empty;
try
{
dispName = rm.GetString(keyName);
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
if (String.IsNullOrEmpty(dispName) == false)
{
sv.DisplayName = dispName;
}
try
{
description = rm.GetString(keyDesc);
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
if (String.IsNullOrEmpty(description) == false)
{
sv.Description = description;
}
}
}
}
public void SetData(ITypeDescriptorContext context, IWindowsFormsEditorService editorService, object value)
{
m_editorService = editorService;
m_PropertyType = context.PropertyDescriptor.PropertyType;
if (m_PropertyType.IsEnum)
{
m_EnumDataType = Enum.GetUnderlyingType(m_PropertyType);
m_bFlag = (m_PropertyType.GetCustomAttributes(typeof(FlagsAttribute), false).Length > 0);
}
m_Value = value;
listViewEnum.Items.Clear( );
listViewEnum.CheckBoxes = m_bFlag;
if (!(context.PropertyDescriptor is CustomPropertyDescriptor))
{
throw new Exception("PropertyDescriptorManager has not been installed on this instance.");
}
CustomPropertyDescriptor cpd = context.PropertyDescriptor as CustomPropertyDescriptor;
// create list view items for the visible Enum items
foreach (StandardValueAttribute sva in cpd.StandardValues)
{
if (sva.Visible)
{
ListViewItem lvi = new ListViewItem( );
lvi.Text = sva.DisplayName;
lvi.ForeColor = (sva.Enabled == true ? lvi.ForeColor : Color.FromKnownColor(KnownColor.GrayText));
lvi.Tag = new TagItem(sva);
listViewEnum.Items.Add(lvi);
}
}
UpdateCheckState( );
// make initial selection
if (m_bFlag)
{
// select the first checked one
foreach (ListViewItem lvi in listViewEnum.CheckedItems)
{
lvi.Selected = true;
lvi.EnsureVisible( );
break;
}
}
else
{
foreach (ListViewItem lvi in listViewEnum.Items)
{
TagItem ti = lvi.Tag as TagItem;
if (ti.Item.Value.Equals(m_Value))
{
lvi.Selected = true;
lvi.EnsureVisible( );
break;
}
}
}
}
public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value)
{
//WriteContext("ConvertFrom", context, value, Type.Missing.GetType());
ICollection <StandardValueAttribute> col = null;
Type propType = Type.Missing.GetType();
if (context != null && context.PropertyDescriptor is CustomPropertyDescriptor)
{
CustomPropertyDescriptor cpd = context.PropertyDescriptor as CustomPropertyDescriptor;
UpdateEnumDisplayText(cpd);
col = cpd.StandardValues;
propType = cpd.PropertyType;
}
if (value == null)
{
return(null);
}
else if (value is string)
{
if (propType.IsEnum)
{
var sInpuValue = value as string;
string[] arrDispName = sInpuValue.Split(new char[] { ',' }, StringSplitOptions.RemoveEmptyEntries);
var sb = new StringBuilder(1000);
foreach (string sDispName in arrDispName)
{
string sTrimValue = sDispName.Trim();
foreach (StandardValueAttribute sva in col)
{
if (String.Compare(sva.Value.ToString(), sTrimValue, true) == 0 ||
String.Compare(sva.DisplayName, sTrimValue, true) == 0)
{
if (sb.Length > 0)
{
sb.Append(",");
}
sb.Append(sva.Value.ToString());
}
}
} // end of foreach..loop
return(Enum.Parse(propType, sb.ToString(), true));
}
foreach (StandardValueAttribute sva in col)
{
if (String.Compare(value.ToString(), sva.DisplayName, true, culture) == 0 ||
String.Compare(value.ToString(), sva.Value.ToString(), true, culture) == 0)
{
return(sva.Value);
}
}
var tc = TypeDescriptor.GetConverter(propType);
if (tc != null)
{
object convertedValue = null;
try
{
convertedValue = tc.ConvertFrom(context, culture, value);
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
if (tc.IsValid(convertedValue))
{
return(convertedValue);
}
}
}
else if (value.GetType() == propType)
{
return(value);
}
else if (value is StandardValueAttribute)
{
return((value as StandardValueAttribute).Value);
}
return(base.ConvertFrom(context, culture, value));
}
