private static IFieldPlaceholder GetItem_FromXmlNode(XmlNode validationNode)
{
if (validationNode.Name != "placeholderItem")
{
return(null);
}
string fullNameSpace = validationNode.Attributes["type"].Value;
//check to verify that xml was not malformed
if (string.IsNullOrEmpty(fullNameSpace))
{
return(null);
}
//verify we can break up the type string into a namespace and assembly name
string[] split = fullNameSpace.Split(',');
if (split.Length == 0)
{
return(null);
}
string nameSpace = split[0];
string assemblyName = split[1];
IFieldPlaceholder fieldPlaceholder = GetItem_FromReflection(nameSpace, assemblyName);
if (fieldPlaceholder == null)
{
return(null);
}
//set max count
fieldPlaceholder.Key = null;
if (validationNode.Attributes["key"] != null && !string.IsNullOrEmpty(validationNode.Attributes["key"].Value))
{
if (!string.IsNullOrEmpty(validationNode.Attributes["key"].Value))
{
fieldPlaceholder.Key = validationNode.Attributes["key"].Value;
}
}
return(fieldPlaceholder);
}
/// <summary>
/// Uses reflection to instantiate the IFieldPlaceholder class
/// </summary>
/// <param name="nameSpace"></param>
/// <param name="assemblyName"></param>
/// <returns></returns>
private static IFieldPlaceholder GetItem_FromReflection(string nameSpace, string assemblyName)
{
// load the assemly
Assembly assembly = GetAssembly(assemblyName);
// Walk through each type in the assembly looking for our class
Type type = assembly.GetType(nameSpace);
if (type == null || !type.IsClass)
{
return(null);
}
//cast to validator class
IFieldPlaceholder fieldPlaceholder = (IFieldPlaceholder)Activator.CreateInstance(type);
if (fieldPlaceholder == null)
{
return(null);
}
return(fieldPlaceholder);
}
