/// Generic function to read an object value. Returns true if the read
/// succeeded.
private bool ReadValue(XmlNode node, TypeConverter converter, out object value)
{
try
{
foreach (XmlNode child in node.ChildNodes)
{
if (child.NodeType == XmlNodeType.Text)
{
value = converter.ConvertFromInvariantString(node.InnerText);
return(true);
}
else if (child.Name.Equals("Binary"))
{
byte[] data = Convert.FromBase64String(child.InnerText);
// Binary blob. Now, check to see if the type converter
// can convert it. If not, use serialization.
//
if (GetConversionSupported(converter, typeof(byte[])))
{
value = converter.ConvertFrom(null, CultureInfo.InvariantCulture, data);
return(true);
}
else
{
BinaryFormatter formatter = new BinaryFormatter();
MemoryStream stream = new MemoryStream(data);
value = formatter.Deserialize(stream);
return(true);
}
}
else if (child.Name.Equals("InstanceDescriptor"))
{
value = ReadInstanceDescriptor(child);
return(value != null);
}
else if (child.Name.Equals("Reference"))
{
XmlAttribute memberAttr = child.Attributes["name"];
return(FindComponent(memberAttr.Value, out value));
}
else
{
//MessageBox.Show(string.Format("Unexpected element type {0}", child.Name),"错误17");
value = null;
return(false);
}
}
// If we get here, it is because there were no nodes. No nodes and no inner
// text is how we signify null.
//
value = null;
return(true);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "错误18");
value = null;
return(false);
}
}
/// <summary>
/// Конвертирует строку в указанный тип, используя инвариантную культуру.
/// </summary>
/// <typeparam name="T">Тип, в который будет сконвертирована строка.</typeparam>
/// <param name="value">Строка.</param>
/// <returns>Результат конвертации.</returns>
private static T ConvertTo <T>(string value)
{
TypeConverter converter = TypeDescriptor.GetConverter(typeof(T));
return((T)converter.ConvertFromInvariantString(value));
}