本文整理汇总了C#中System.Dynamic.DynamicObject.TryInvoke方法的典型用法代码示例。如果您正苦于以下问题：C# DynamicObject.TryInvoke方法的具体用法？C# DynamicObject.TryInvoke怎么用？C# DynamicObject.TryInvoke使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类System.Dynamic.DynamicObject的用法示例。
在下文中一共展示了DynamicObject.TryInvoke方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: TryGetMember
// The class derived from DynamicObject.
public class DynamicNumber : DynamicObject
{
// The inner dictionary to store field names and values.
Dictionary<string, object> dictionary
= new Dictionary<string, object>();
// Get the property value.
public override bool TryGetMember(
GetMemberBinder binder, out object result)
{
return dictionary.TryGetValue(binder.Name, out result);
}
// Set the property value.
public override bool TrySetMember(
SetMemberBinder binder, object value)
{
dictionary[binder.Name] = value;
return true;
}
// Initializing properties with arguments' values.
public override bool TryInvoke(
InvokeBinder binder, object[] args, out object result)
{
// The invoke operation in this case takes two arguments.
// The first one is integer and the second one is string.
if ((args.Length == 2) &&
(args[0].GetType() == typeof(int)) &&
(args[1].GetType() == typeof(String)))
{
// If the property already exists,
// its value is changed.
// Otherwise, a new property is created.
if (dictionary.ContainsKey("Numeric"))
dictionary["Numeric"] = args[0];
else
dictionary.Add("Numeric", args[0]);
if (dictionary.ContainsKey("Textual"))
dictionary["Textual"] = args[1];
else
dictionary.Add("Textual", args[1]);
result = true;
return true;
}
else
{
// If the number of arguments is wrong,
// or if arguments are of the wrong type,
// the method returns false.
result = false;
return false;
}
}
}
class Program
{
static void Test(string[] args)
{
// Creating a dynamic object.
dynamic number = new DynamicNumber();
// Adding and initializing properties.
// The TrySetMember method is called.
number.Numeric = 1;
number.Textual = "One";
// Printing out the result.
// The TryGetMember method is called.
Console.WriteLine(number.Numeric + " " + number.Textual);
// Invoking an object.
// The TryInvoke method is called.
number(2, "Two");
Console.WriteLine(number.Numeric + " " + number.Textual);
// The following statement produces a run-time exception
// because in this example the method invocation
// expects two arguments.
// number(0);
}
}输出：
1 One 2 Two