本文整理匯總了C#中System.Dynamic.DynamicObject類的典型用法代碼示例。如果您正苦於以下問題:C# DynamicObject類的具體用法?C# DynamicObject怎麽用?C# DynamicObject使用的例子?那麽, 這裏精選的類代碼示例或許可以為您提供幫助。
DynamicObject類屬於System.Dynamic命名空間,在下文中一共展示了DynamicObject類的1個代碼示例,這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚,您的評價將有助於係統推薦出更棒的C#代碼示例。
示例1: TryGetMember
// The class derived from DynamicObject.
public class DynamicDictionary : DynamicObject
{
// The inner dictionary.
Dictionary<string, object> dictionary
= new Dictionary<string, object>();
// This property returns the number of elements
// in the inner dictionary.
public int Count
{
get
{
return dictionary.Count;
}
}
// If you try to get a value of a property
// not defined in the class, this method is called.
public override bool TryGetMember(
GetMemberBinder binder, out object result)
{
// Converting the property name to lowercase
// so that property names become case-insensitive.
string name = binder.Name.ToLower();
// If the property name is found in a dictionary,
// set the result parameter to the property value and return true.
// Otherwise, return false.
return dictionary.TryGetValue(name, out result);
}
// If you try to set a value of a property that is
// not defined in the class, this method is called.
public override bool TrySetMember(
SetMemberBinder binder, object value)
{
// Converting the property name to lowercase
// so that property names become case-insensitive.
dictionary[binder.Name.ToLower()] = value;
// You can always add a value to a dictionary,
// so this method always returns true.
return true;
}
}
class Program
{
static void Main(string[] args)
{
// Creating a dynamic dictionary.
dynamic person = new DynamicDictionary();
// Adding new dynamic properties.
// The TrySetMember method is called.
person.FirstName = "Ellen";
person.LastName = "Adams";
// Getting values of the dynamic properties.
// The TryGetMember method is called.
// Note that property names are case-insensitive.
Console.WriteLine(person.firstname + " " + person.lastname);
// Getting the value of the Count property.
// The TryGetMember is not called,
// because the property is defined in the class.
Console.WriteLine(
"Number of dynamic properties:" + person.Count);
// The following statement throws an exception at run time.
// There is no "address" property,
// so the TryGetMember method returns false and this causes a
// RuntimeBinderException.
// Console.WriteLine(person.address);
}
}
輸出:
Ellen Adams Number of dynamic properties: 2