ASP.NET 扩展实现代码
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【下载文档: ASP.NET 扩展实现代码.txt 】
.NET 扩展实现代码
class Command { public virtual void Execute() { } } class InvalidOperationException
: InvalidOperationException where T : Command { public InvalidOperationException(string message) : base(message) { } // some specific information about // the command type T that threw this exception } static class CommandExtensions { public static void ThrowInvalidOperationException( this TCommand command, string message) where TCommand : Command { throw new InvalidOperationException(message); } } class CopyCommand : Command { public override void Execute() { // after something went wrong: this.ThrowInvalidOperationException("Something went wrong"); } } class CutCommand : Command { public override void Execute() { // after something went wrong: this.ThrowInvalidOperationException("Something else went wrong"); } }
