public static void PerformTest2()
{
/*
* Anonymous methods provide a technique to pass a code block as a delegate parameter.
* Anonymous methods are the methods without a name, just the body.
*/
MyFunc f = delegate(int a)
{
return(a * a);
};
var result = f(9);
Console.WriteLine("Result is:{0}", result);
// direct multicasting
f += delegate(int b)
{
return(b + b);
};
var result1 = f(5);
Console.WriteLine("Result is:{0}", result1);
MyFunc1 f2 = delegate(int a, int b)
{
return(a * b);
};
var result2 = f2(9, 45);
Console.WriteLine("Result is:{0}", result2);
}
/// <summary>
/// 采用自定义的映射方式，将数据容器中的数据映射到指定的类中
/// </summary>
/// <typeparam name="TResult">结果类型</typeparam>
/// <param name="fun">处理数据的方法</param>
/// <returns></returns>
public IEnumerable <TResult> Map <TResult>(MyFunc1 <TResult> fun) where TResult : class, new()
{
if (this.Values == null)
{
this.Execute();
}
if (this.Values != null && this.fieldNames != null)
{
if (this.Values.Count == 0)
{
yield break;
}
else
{
foreach (object[] itemValues in this.Values)
{
TResult t = new TResult();
this.currValue = itemValues;
fun(t);
yield return(t);
}
}
}
else
{
throw new Exception("EntityContainer 错误，执行查询没有返回任何行。");
}
}
public static void Table(MyFunc1 func, double x, double b)
{
Console.Write("----- X ----- Y -----");
while (x <= b)
{
Console.WriteLine("| {0,8:0.000} | {1,8:0.000} |", x, func(x));
x += 1;
}
Console.WriteLine("-----------------------");
}
