// --------------------------------------------------------------------------------------------
/// <summary>
/// Converts the string representation of a hierarchy ID to HierarchyID equivalent. A return
/// value indicates whether the conversion succeeded.
/// </summary>
/// <param name="value">A string containing a hierarchy ID to convert.</param>
/// <param name="id">
/// When this method returns, contains the hierarchy ID value equivalent to the id contained
/// in *value*, if the conversion succeeded, or Nil if the conversion failed.</param>
/// <returns>
/// true if *value* was converted successfully; otherwise, false.
/// </returns>
// --------------------------------------------------------------------------------------------
public static bool TryParse(string value, out HierarchyId id)
{
if (String.Compare("root", value, true) == 0)
{
id = Root;
return(true);
}
if (String.Compare("nil", value, true) == 0)
{
id = Nil;
return(true);
}
if (String.Compare("selection", value, true) == 0)
{
id = Selection;
return(true);
}
int intId;
if (Int32.TryParse(value, out intId))
{
id = new HierarchyId(intId);
return(true);
}
uint uintId;
if (UInt32.TryParse(value, out uintId))
{
id = new HierarchyId(uintId);
return(true);
}
id = Nil;
return(false);
}
// --------------------------------------------------------------------------------------------
/// <summary>
/// Converts the specified value object to a <see cref="T:System.String"/> object.
/// </summary>
/// <param name="context">
/// An <see cref="T:System.ComponentModel.ITypeDescriptorContext"/> that provides a format context.
/// </param>
/// <param name="culture">
/// The <see cref="T:System.Globalization.CultureInfo"/> to use.
/// </param>
/// <param name="value">The <see cref="T:System.Object"/> to convert.</param>
/// <returns>
/// An <see cref="T:System.Object"/> that represents the converted value.
/// </returns>
/// <exception cref="T:System.NotSupportedException">
/// The conversion could not be performed.
/// </exception>
// --------------------------------------------------------------------------------------------
public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value)
{
if (value is int)
{
return(new HierarchyId((int)value));
}
if (value is uint)
{
return(new HierarchyId((uint)value));
}
var strValue = value as string;
if (strValue != null)
{
return(HierarchyId.Parse(strValue));
}
return(base.ConvertFrom(context, culture, value));
}
// --------------------------------------------------------------------------------------------
/// <summary>
/// Converts the string representation of a hierarchy ID to HierarchyID equivalent. A return
/// value indicates whether the conversion succeeded.
/// </summary>
/// <param name="value">A string containing a hierarchy ID to convert.</param>
/// <param name="id">
/// When this method returns, contains the hierarchy ID value equivalent to the id contained
/// in *value*, if the conversion succeeded, or Nil if the conversion failed.</param>
/// <returns>
/// true if *value* was converted successfully; otherwise, false.
/// </returns>
// --------------------------------------------------------------------------------------------
public static bool TryParse(string value, out HierarchyId id)
{
if (String.Compare("root", value, true) == 0)
{
id = Root;
return true;
}
if (String.Compare("nil", value, true) == 0)
{
id = Nil;
return true;
}
if (String.Compare("selection", value, true) == 0)
{
id = Selection;
return true;
}
int intId;
if (Int32.TryParse(value, out intId))
{
id = new HierarchyId(intId);
return true;
}
uint uintId;
if (UInt32.TryParse(value, out uintId))
{
id = new HierarchyId(uintId);
return true;
}
id = Nil;
return false;
}
