public IEnumerator <IShellProperty> GetEnumerator()
{
if (this.properties == null)
{
using (var propertyStore = ShellPropertyStore.Create(this.ShellObject))
{
var propertyCount = propertyStore.Count;
this.properties = new List <IShellProperty>(propertyCount);
for (var index = 0u; index < propertyCount; ++index)
{
var propertyKey = propertyStore.GetAt(index);
try
{
this.properties.Add(ShellPropertyFactory.Create(propertyKey, this.ShellObject));
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine(ex.Message);
}
}
}
}
return(this.properties.GetEnumerator());
}
/// <summary>
/// Gets the text for displaying the property value.
/// </summary>
/// <param name="formatFlags">Format flags.</param>
/// <returns></returns>
public string GetDisplayText(PropertyDescriptionFormatFlags formatFlags)
{
using (var store = ShellPropertyStore.Create(this.ShellObject))
{
var propVar = default(PropVariant);
try
{
store.GetPropVariant(this.PropertyKey, out propVar);
return(this.Description.GetDisplayText(ref propVar, formatFlags));
}
finally
{
propVar.Clear();
}
}
}
/// <summary>
/// Initialize a new instance of the <see cref="ShellPropertyWriter" /> class
/// to the specified <see cref="ShellObject" />.
/// </summary>
/// <param name="shellObject"></param>
internal ShellPropertyWriter(ShellObject shellObject)
{
Contract.Requires <ArgumentNullException>(shellObject != null);
try
{
this.Store = ShellPropertyStore.CreateWritable(shellObject);
}
catch (InvalidComObjectException e)
{
throw new ShellException(ErrorMessages.ShellPropertyUnableToGetWritableProperty, e);
}
catch (InvalidCastException)
{
throw new ShellException(ErrorMessages.ShellPropertyUnableToGetWritableProperty);
}
}
/// <summary>
/// Clear property value.
/// </summary>
public void ClearValue()
{
try
{
using (var writableStore = ShellPropertyStore.CreateWritable(this.ShellObject))
{
writableStore.ClearValue(this.PropertyKey);
writableStore.Commit();
}
}
catch (InvalidComObjectException e)
{
throw new ShellException(ErrorMessages.ShellPropertyUnableToGetWritableProperty, e);
}
catch (InvalidCastException e)
{
throw new ShellException(ErrorMessages.ShellPropertyUnableToGetWritableProperty, e);
}
}
public bool TryGetDisplayText(PropertyDescriptionFormatFlags formatFlags, out string text)
{
using (var store = ShellPropertyStore.Create(this.ShellObject))
{
var propVar = default(PropVariant);
try
{
store.GetPropVariant(this.PropertyKey, out propVar);
if (!this.Description.TryGetDisplayText(ref propVar, formatFlags, out text))
{
text = String.Empty;
return(false);
}
return(true);
}
finally
{
propVar.Clear();
}
}
}
/// <summary>
/// Initialize a instance of the <see cref="ShellProperty{T}" /> class.
/// </summary>
/// <param name="propertyKey"></param>
/// <param name="description"></param>
/// <param name="propertyStore"></param>
/// <remarks>
/// This constructor is used in <see cref="ShellPropertyFactory" />.
/// Do not change the order of the parameters.
/// </remarks>
internal ShellProperty(ShellPropertyKey propertyKey, ShellPropertyDescription description, ShellPropertyStore propertyStore)
{
Contract.Requires <ArgumentNullException>(propertyKey != null);
Contract.Requires <ArgumentNullException>(propertyStore != null);
this.PropertyStore = propertyStore;
this.PropertyKey = propertyKey;
this.description = description;
this.AllowSetTruncatedValue = false;
if (this.Description.ValueType != typeof(T))
{
throw new InvalidOperationException(
String.Format(ErrorMessages.ShellPropertyUnmatchValueType, typeof(T), this.Description.ValueType));
}
}
