分享一个参数检查的类
在函数中,通常需要对参数进行判断。如判断传入的参数是否为 null,是否为Empty。
做参数检查会降低代码的运行效率——因为多了判断,但是能有效提高代码健壮性。建议你至少应对公开的方法——包括public,internal的方法,进行参数检查。
我们先看一段调用的代码,有个基本印象:
Param.Check(value).NotNull().ThrowException("value 参数不能为 null").Execute();
或者
if (Param.Check(bytes).NotNull().Log("bytes 对象不能为 null").Execute())
Param是一个类,静态方法:
public static IChecker Check(object value)
返回了一个 IChecker 接口对象
IChecker接口中定义了很多检查的方法,如NotNull,NotEmpty等等
![](https://images.cnblogs.com/OutliningIndicators/ContractedBlock.gif)
public interface IChecker
{
///<summary>
/// 要求参数长度为指定的长度。
///</summary>
///<param name="len">参数长度。</param>
///<returns>返回<see cref="IErrorProcessor"/>处理对象。</returns>
IErrorProcessor LengthEqual(int len);
/// <summary>
/// 要求参数为 <c>true</c>。
/// </summary>
/// <returns>返回<see cref="IErrorProcessor"/>处理对象。</returns>
IErrorProcessor IsTrue();
/// <summary>
/// 要求参数不为 <c>null</c>。
/// </summary>
/// <returns>返回<see cref="IErrorProcessor"/>处理对象。</returns>
IErrorProcessor NotNull();
/// <summary>
/// 要求不能为空。
/// </summary>
/// <returns>返回<see cref="IErrorProcessor"/>处理对象。</returns>
IErrorProcessor NotEmpty();
/// <summary>
/// 要求是指定类型的实例。
/// </summary>
/// <param name="type">指定的类型。</param>
/// <returns>返回<see cref="IErrorProcessor"/>处理对象。</returns>
IErrorProcessor IsInstanceOf(Type type);
/// <summary>
/// 要求在集合中。
/// </summary>
/// <param name="collection">集合。</param>
/// <returns>返回<see cref="IErrorProcessor"/>处理对象。</returns>
IErrorProcessor OneOf(IEnumerable collection);
/// <summary>
/// 要求不在集合中。
/// </summary>
/// <param name="collection">集合。</param>
/// <returns>返回<see cref="IErrorProcessor"/>处理对象。</returns>
IErrorProcessor NotOneOf(IEnumerable collection);
/// <summary>
/// 要求与另一值相等。
/// </summary>
/// <param name="value">另一参数。</param>
/// <returns>返回<see cref="IErrorProcessor"/>处理对象。</returns>
IErrorProcessor Equal(object value);
}
{
///<summary>
/// 要求参数长度为指定的长度。
///</summary>
///<param name="len">参数长度。</param>
///<returns>返回<see cref="IErrorProcessor"/>处理对象。</returns>
IErrorProcessor LengthEqual(int len);
/// <summary>
/// 要求参数为 <c>true</c>。
/// </summary>
/// <returns>返回<see cref="IErrorProcessor"/>处理对象。</returns>
IErrorProcessor IsTrue();
/// <summary>
/// 要求参数不为 <c>null</c>。
/// </summary>
/// <returns>返回<see cref="IErrorProcessor"/>处理对象。</returns>
IErrorProcessor NotNull();
/// <summary>
/// 要求不能为空。
/// </summary>
/// <returns>返回<see cref="IErrorProcessor"/>处理对象。</returns>
IErrorProcessor NotEmpty();
/// <summary>
/// 要求是指定类型的实例。
/// </summary>
/// <param name="type">指定的类型。</param>
/// <returns>返回<see cref="IErrorProcessor"/>处理对象。</returns>
IErrorProcessor IsInstanceOf(Type type);
/// <summary>
/// 要求在集合中。
/// </summary>
/// <param name="collection">集合。</param>
/// <returns>返回<see cref="IErrorProcessor"/>处理对象。</returns>
IErrorProcessor OneOf(IEnumerable collection);
/// <summary>
/// 要求不在集合中。
/// </summary>
/// <param name="collection">集合。</param>
/// <returns>返回<see cref="IErrorProcessor"/>处理对象。</returns>
IErrorProcessor NotOneOf(IEnumerable collection);
/// <summary>
/// 要求与另一值相等。
/// </summary>
/// <param name="value">另一参数。</param>
/// <returns>返回<see cref="IErrorProcessor"/>处理对象。</returns>
IErrorProcessor Equal(object value);
}
IChecker中的方法返回IErrorProcessor对象
IErrorProcessor定义了如果检查出错时,该做什么处理——可以抛出异常、不做任何处理、记录日志等
处理方式定义如下:
![](https://images.cnblogs.com/OutliningIndicators/ContractedBlock.gif)
[Flags]
public enum ProcessMode
{
///<summary>
/// 不做任何处理。
///</summary>
None = 0,
///<summary>
/// 在控制台中打印日志。
///</summary>
Log = 1,
///<summary>
/// 显示消息框。
///</summary>
ShowMessage = 2,
///<summary>
/// 抛出异常。
///</summary>
ThrowException = 4,
/// <summary>
/// 显示Debug.Assert
/// </summary>
DebugAssert = 8
}
public enum ProcessMode
{
///<summary>
/// 不做任何处理。
///</summary>
None = 0,
///<summary>
/// 在控制台中打印日志。
///</summary>
Log = 1,
///<summary>
/// 显示消息框。
///</summary>
ShowMessage = 2,
///<summary>
/// 抛出异常。
///</summary>
ThrowException = 4,
/// <summary>
/// 显示Debug.Assert
/// </summary>
DebugAssert = 8
}
最后,调用Execute方法,执行检查。通过检查会返回 true,否则会根据处理方式进行相应的处理。
全部代码
![](https://images.cnblogs.com/OutliningIndicators/ContractedBlock.gif)
using System;
using System.Collections;
using System.Diagnostics;
using System.Runtime.InteropServices;
using System.Runtime.Serialization;
namespace Ideal.ReferenceCodes
{
#region 接口
///<summary>
/// 参数检查接口。
///</summary>
public interface IChecker
{
///<summary>
/// 要求参数长度为指定的长度。
///</summary>
///<param name="len">参数长度。</param>
///<returns>返回<see cref="IErrorProcessor"/>处理对象。</returns>
IErrorProcessor LengthEqual(int len);
/// <summary>
/// 要求参数为 <c>true</c>。
/// </summary>
/// <returns>返回<see cref="IErrorProcessor"/>处理对象。</returns>
IErrorProcessor IsTrue();
/// <summary>
/// 要求参数不为 <c>null</c>。
/// </summary>
/// <returns>返回<see cref="IErrorProcessor"/>处理对象。</returns>
IErrorProcessor NotNull();
/// <summary>
/// 要求不能为空。
/// </summary>
/// <returns>返回<see cref="IErrorProcessor"/>处理对象。</returns>
IErrorProcessor NotEmpty();
/// <summary>
/// 要求是指定类型的实例。
/// </summary>
/// <param name="type">指定的类型。</param>
/// <returns>返回<see cref="IErrorProcessor"/>处理对象。</returns>
IErrorProcessor IsInstanceOf(Type type);
/// <summary>
/// 要求在集合中。
/// </summary>
/// <param name="collection">集合。</param>
/// <returns>返回<see cref="IErrorProcessor"/>处理对象。</returns>
IErrorProcessor OneOf(IEnumerable collection);
/// <summary>
/// 要求不在集合中。
/// </summary>
/// <param name="collection">集合。</param>
/// <returns>返回<see cref="IErrorProcessor"/>处理对象。</returns>
IErrorProcessor NotOneOf(IEnumerable collection);
/// <summary>
/// 要求与另一值相等。
/// </summary>
/// <param name="value">另一参数。</param>
/// <returns>返回<see cref="IErrorProcessor"/>处理对象。</returns>
IErrorProcessor Equal(object value);
}
/// <summary>
/// 参数错误处理接口。
/// </summary>
public interface IErrorProcessor : IExecute
{
/// <summary>
/// 抛出参数错误的异常。
/// </summary>
/// <returns>返回<see cref="IExecute"/>的实例。</returns>
IExecute ThrowException();
/// <summary>
/// 抛出参数错误的异常。
/// </summary>
/// <param name="msg">显示的错误消息。</param>
/// <returns>返回<see cref="IExecute"/>的实例。</returns>
IExecute ThrowException(string msg);
/// <summary>
/// 显示在控制台。
/// </summary>
/// <returns>返回<see cref="IExecute"/>的实例。</returns>
IExecute Log();
/// <summary>
/// 显示在控制台。
/// </summary>
/// <param name="msg">显示的错误消息。</param>
/// <returns>返回<see cref="IExecute"/>的实例。</returns>
IExecute Log(string msg);
/// <summary>
/// 不做任何处理。
/// </summary>
/// <returns>返回<see cref="IExecute"/>的实例。</returns>
IExecute DoNothing();
/// <summary>
/// 显示弹出消息框。
/// </summary>
/// <returns>返回<see cref="IExecute"/>的实例。</returns>
IExecute ShowMessage();
/// <summary>
/// 显示弹出消息框。
/// </summary>
/// <param name="msg">显示的消息内容。</param>
/// <returns>返回<see cref="IExecute"/>的实例。</returns>
IExecute ShowMessage(string msg);
/// <summary>
/// 弹出 Debug.Assert 窗口。
/// </summary>
/// <returns>返回<see cref="IExecute"/>的实例。</returns>
IExecute Assert();
/// <summary>
/// 弹出 Debug.Assert 窗口。
/// </summary>
/// <param name="msg">显示的消息内容。</param>
/// <returns>返回<see cref="IExecute"/>的实例。</returns>
IExecute Assert(string msg);
}
/// <summary>
/// 执行参数检查接口。
/// </summary>
public interface IExecute
{
/// <summary>
/// 执行参数检查。
/// </summary>
bool Execute();
}
#endregion
///<summary>
/// 参数检查处理类。
///</summary>
public sealed class Param : IChecker, IErrorProcessor
{
delegate bool CheckDelegate();
private static ProcessMode _default = ProcessMode.DebugAssert;
/// <summary>
/// 获取或设置参数默认处理模式
/// </summary>
public static ProcessMode Default { get { return _default; } set { _default = value; } }
private readonly object o;
private CheckDelegate _check;
private ProcessMode mode = Default;
private string _msg;
private Param(object o)
{
this.o = o;
}
///<summary>
/// 检查参数。
///</summary>
///<param name="value">检查的对象。</param>
///<returns>返回<see cref="IChecker"/>的实例。</returns>
public static IChecker Check(object value)
{
return new Param(value);
}
#region Execute
bool IExecute.Execute()
{
if (_check == null) return true;
if (_check()) return true;
switch (mode)
{
case ProcessMode.None:
break;
case ProcessMode.Log:
Console.WriteLine("参数检查错误:{0}\r\n{1}", _msg, new StackTrace());
break;
case ProcessMode.ShowMessage:
int result = NativeMethods.MessageBox(IntPtr.Zero, "参数检查错误:" + _msg + "\r\n" + new StackTrace(), "参数警告", 0);
return result == -1;
case ProcessMode.ThrowException:
throw new ParamException(_msg);
case ProcessMode.DebugAssert:
Debug.Assert(false, "参数检查错误:" + _msg, new StackTrace().ToString());
break;
default:
throw new ParamException("错误处理模式未知。");
}
return false;
}
#endregion
#region NativeMethods
private class NativeMethods
{
private NativeMethods()
{
}
[DllImport("user32.dll", CharSet = CharSet.Unicode)]
public static extern int MessageBox(IntPtr hWnd, String text, String caption, int options);
}
#endregion
#region Implementation of IChecker
IErrorProcessor IChecker.LengthEqual(int len)
{
_msg = "要求参数长度为 " + len;
_check = delegate
{
if (o is string)
{
return ((string)o).Length == len;
}
if (o is Array)
{
return ((Array)o).Length == len;
}
return false;
};
return this;
}
IErrorProcessor IChecker.IsTrue()
{
_msg = "要求参数值为 true";
_check = delegate { return (o is bool) && ((bool)o); };
return this;
}
IErrorProcessor IChecker.NotNull()
{
_msg = "要求参数值不为 null";
_check = delegate { return o != null; };
return this;
}
IErrorProcessor IChecker.NotEmpty()
{
_msg = "要求参数值不为空";
_check = delegate
{
if ((o is string) && (((string)o).Length == 0))
{
return false;
}
if ((o is Array) && (((Array)o).Length == 0))
{
return false;
}
return !(o is DBNull);
};
return this;
}
IErrorProcessor IChecker.IsInstanceOf(Type type)
{
if (type == null)
{
throw new ArgumentNullException("type", "检查参数时出错,调用方法 IsInstanceOf(Type) 的 type参数不能为 null");
}
_msg = "要求参数是 " + type.FullName + " 的实例";
_check = delegate { return type.IsInstanceOfType(o); };
return this;
}
IErrorProcessor IChecker.OneOf(IEnumerable collection)
{
_msg = "要求参数值包含在集合中";
_check = delegate
{
foreach (var enumItem in collection)
{
if (enumItem == o) return true;
}
return false;
};
return this;
}
IErrorProcessor IChecker.NotOneOf(IEnumerable collection)
{
_msg = "要求参数值不在集合中";
_check = delegate
{
foreach (var enumItem in collection)
{
if (enumItem == o) return false;
}
return true;
};
return this;
}
IErrorProcessor IChecker.Equal(object value)
{
_msg = "要求参数值与" + value + "相等";
_check = delegate { return value.Equals(o); };
return this;
}
#endregion
#region Implementation of IErrorProcessor
IExecute IErrorProcessor.ThrowException()
{
mode = ProcessMode.ThrowException;
return this;
}
IExecute IErrorProcessor.ThrowException(string msg)
{
mode = ProcessMode.ThrowException;
_msg = msg;
return this;
}
IExecute IErrorProcessor.Log()
{
mode = ProcessMode.Log;
return this;
}
IExecute IErrorProcessor.Log(string msg)
{
mode = ProcessMode.Log;
_msg = msg;
return this;
}
IExecute IErrorProcessor.DoNothing()
{
mode = ProcessMode.None;
return this;
}
IExecute IErrorProcessor.ShowMessage()
{
mode = ProcessMode.ShowMessage;
return this;
}
IExecute IErrorProcessor.ShowMessage(string msg)
{
mode = ProcessMode.ShowMessage;
_msg = msg;
return this;
}
IExecute IErrorProcessor.Assert()
{
mode = ProcessMode.DebugAssert;
return this;
}
IExecute IErrorProcessor.Assert(string msg)
{
mode = ProcessMode.DebugAssert;
_msg = msg;
return this;
}
#endregion
}
///<summary>
/// 处理模式。
///</summary>
[Flags]
public enum ProcessMode
{
///<summary>
/// 不做任何处理。
///</summary>
None = 0,
///<summary>
/// 在控制台中打印日志。
///</summary>
Log = 1,
///<summary>
/// 显示消息框。
///</summary>
ShowMessage = 2,
///<summary>
/// 抛出异常。
///</summary>
ThrowException = 4,
/// <summary>
/// 显示Debug.Assert
/// </summary>
DebugAssert = 8
}
/// <summary>
/// 参数检查错误。
/// </summary>
[Serializable]
public class ParamException : Exception
{
/// <summary>
/// 初始化<see cref="ParamException"/>的实例。
/// </summary>
/// <param name="msg">错误消息。</param>
public ParamException(string msg)
: this(msg, null)
{
}
/// <summary>
/// 初始化<see cref="ParamException"/>的实例。
/// </summary>
public ParamException()
: this(string.Empty, null)
{
}
/// <summary>
/// 初始化<see cref="ParamException"/>的实例。
/// </summary>
/// <param name="msg">错误消息。</param>
/// <param name="innerException">内部异常。</param>
public ParamException(string msg, Exception innerException)
: base(string.Format(null, "未通过参数检查:{0}", msg), innerException)
{
}
/// <summary>
/// 用序列化数据初始化 <see cref="ParamException"/> 类的新实例。
/// </summary>
/// <param name="info">它存有有关所引发异常的序列化的对象数据</param>
/// <param name="context">它包含有关源或目标的上下文信息</param>
protected ParamException(SerializationInfo info, StreamingContext context)
: base(info, context)
{
}
}
}
using System.Collections;
using System.Diagnostics;
using System.Runtime.InteropServices;
using System.Runtime.Serialization;
namespace Ideal.ReferenceCodes
{
#region 接口
///<summary>
/// 参数检查接口。
///</summary>
public interface IChecker
{
///<summary>
/// 要求参数长度为指定的长度。
///</summary>
///<param name="len">参数长度。</param>
///<returns>返回<see cref="IErrorProcessor"/>处理对象。</returns>
IErrorProcessor LengthEqual(int len);
/// <summary>
/// 要求参数为 <c>true</c>。
/// </summary>
/// <returns>返回<see cref="IErrorProcessor"/>处理对象。</returns>
IErrorProcessor IsTrue();
/// <summary>
/// 要求参数不为 <c>null</c>。
/// </summary>
/// <returns>返回<see cref="IErrorProcessor"/>处理对象。</returns>
IErrorProcessor NotNull();
/// <summary>
/// 要求不能为空。
/// </summary>
/// <returns>返回<see cref="IErrorProcessor"/>处理对象。</returns>
IErrorProcessor NotEmpty();
/// <summary>
/// 要求是指定类型的实例。
/// </summary>
/// <param name="type">指定的类型。</param>
/// <returns>返回<see cref="IErrorProcessor"/>处理对象。</returns>
IErrorProcessor IsInstanceOf(Type type);
/// <summary>
/// 要求在集合中。
/// </summary>
/// <param name="collection">集合。</param>
/// <returns>返回<see cref="IErrorProcessor"/>处理对象。</returns>
IErrorProcessor OneOf(IEnumerable collection);
/// <summary>
/// 要求不在集合中。
/// </summary>
/// <param name="collection">集合。</param>
/// <returns>返回<see cref="IErrorProcessor"/>处理对象。</returns>
IErrorProcessor NotOneOf(IEnumerable collection);
/// <summary>
/// 要求与另一值相等。
/// </summary>
/// <param name="value">另一参数。</param>
/// <returns>返回<see cref="IErrorProcessor"/>处理对象。</returns>
IErrorProcessor Equal(object value);
}
/// <summary>
/// 参数错误处理接口。
/// </summary>
public interface IErrorProcessor : IExecute
{
/// <summary>
/// 抛出参数错误的异常。
/// </summary>
/// <returns>返回<see cref="IExecute"/>的实例。</returns>
IExecute ThrowException();
/// <summary>
/// 抛出参数错误的异常。
/// </summary>
/// <param name="msg">显示的错误消息。</param>
/// <returns>返回<see cref="IExecute"/>的实例。</returns>
IExecute ThrowException(string msg);
/// <summary>
/// 显示在控制台。
/// </summary>
/// <returns>返回<see cref="IExecute"/>的实例。</returns>
IExecute Log();
/// <summary>
/// 显示在控制台。
/// </summary>
/// <param name="msg">显示的错误消息。</param>
/// <returns>返回<see cref="IExecute"/>的实例。</returns>
IExecute Log(string msg);
/// <summary>
/// 不做任何处理。
/// </summary>
/// <returns>返回<see cref="IExecute"/>的实例。</returns>
IExecute DoNothing();
/// <summary>
/// 显示弹出消息框。
/// </summary>
/// <returns>返回<see cref="IExecute"/>的实例。</returns>
IExecute ShowMessage();
/// <summary>
/// 显示弹出消息框。
/// </summary>
/// <param name="msg">显示的消息内容。</param>
/// <returns>返回<see cref="IExecute"/>的实例。</returns>
IExecute ShowMessage(string msg);
/// <summary>
/// 弹出 Debug.Assert 窗口。
/// </summary>
/// <returns>返回<see cref="IExecute"/>的实例。</returns>
IExecute Assert();
/// <summary>
/// 弹出 Debug.Assert 窗口。
/// </summary>
/// <param name="msg">显示的消息内容。</param>
/// <returns>返回<see cref="IExecute"/>的实例。</returns>
IExecute Assert(string msg);
}
/// <summary>
/// 执行参数检查接口。
/// </summary>
public interface IExecute
{
/// <summary>
/// 执行参数检查。
/// </summary>
bool Execute();
}
#endregion
///<summary>
/// 参数检查处理类。
///</summary>
public sealed class Param : IChecker, IErrorProcessor
{
delegate bool CheckDelegate();
private static ProcessMode _default = ProcessMode.DebugAssert;
/// <summary>
/// 获取或设置参数默认处理模式
/// </summary>
public static ProcessMode Default { get { return _default; } set { _default = value; } }
private readonly object o;
private CheckDelegate _check;
private ProcessMode mode = Default;
private string _msg;
private Param(object o)
{
this.o = o;
}
///<summary>
/// 检查参数。
///</summary>
///<param name="value">检查的对象。</param>
///<returns>返回<see cref="IChecker"/>的实例。</returns>
public static IChecker Check(object value)
{
return new Param(value);
}
#region Execute
bool IExecute.Execute()
{
if (_check == null) return true;
if (_check()) return true;
switch (mode)
{
case ProcessMode.None:
break;
case ProcessMode.Log:
Console.WriteLine("参数检查错误:{0}\r\n{1}", _msg, new StackTrace());
break;
case ProcessMode.ShowMessage:
int result = NativeMethods.MessageBox(IntPtr.Zero, "参数检查错误:" + _msg + "\r\n" + new StackTrace(), "参数警告", 0);
return result == -1;
case ProcessMode.ThrowException:
throw new ParamException(_msg);
case ProcessMode.DebugAssert:
Debug.Assert(false, "参数检查错误:" + _msg, new StackTrace().ToString());
break;
default:
throw new ParamException("错误处理模式未知。");
}
return false;
}
#endregion
#region NativeMethods
private class NativeMethods
{
private NativeMethods()
{
}
[DllImport("user32.dll", CharSet = CharSet.Unicode)]
public static extern int MessageBox(IntPtr hWnd, String text, String caption, int options);
}
#endregion
#region Implementation of IChecker
IErrorProcessor IChecker.LengthEqual(int len)
{
_msg = "要求参数长度为 " + len;
_check = delegate
{
if (o is string)
{
return ((string)o).Length == len;
}
if (o is Array)
{
return ((Array)o).Length == len;
}
return false;
};
return this;
}
IErrorProcessor IChecker.IsTrue()
{
_msg = "要求参数值为 true";
_check = delegate { return (o is bool) && ((bool)o); };
return this;
}
IErrorProcessor IChecker.NotNull()
{
_msg = "要求参数值不为 null";
_check = delegate { return o != null; };
return this;
}
IErrorProcessor IChecker.NotEmpty()
{
_msg = "要求参数值不为空";
_check = delegate
{
if ((o is string) && (((string)o).Length == 0))
{
return false;
}
if ((o is Array) && (((Array)o).Length == 0))
{
return false;
}
return !(o is DBNull);
};
return this;
}
IErrorProcessor IChecker.IsInstanceOf(Type type)
{
if (type == null)
{
throw new ArgumentNullException("type", "检查参数时出错,调用方法 IsInstanceOf(Type) 的 type参数不能为 null");
}
_msg = "要求参数是 " + type.FullName + " 的实例";
_check = delegate { return type.IsInstanceOfType(o); };
return this;
}
IErrorProcessor IChecker.OneOf(IEnumerable collection)
{
_msg = "要求参数值包含在集合中";
_check = delegate
{
foreach (var enumItem in collection)
{
if (enumItem == o) return true;
}
return false;
};
return this;
}
IErrorProcessor IChecker.NotOneOf(IEnumerable collection)
{
_msg = "要求参数值不在集合中";
_check = delegate
{
foreach (var enumItem in collection)
{
if (enumItem == o) return false;
}
return true;
};
return this;
}
IErrorProcessor IChecker.Equal(object value)
{
_msg = "要求参数值与" + value + "相等";
_check = delegate { return value.Equals(o); };
return this;
}
#endregion
#region Implementation of IErrorProcessor
IExecute IErrorProcessor.ThrowException()
{
mode = ProcessMode.ThrowException;
return this;
}
IExecute IErrorProcessor.ThrowException(string msg)
{
mode = ProcessMode.ThrowException;
_msg = msg;
return this;
}
IExecute IErrorProcessor.Log()
{
mode = ProcessMode.Log;
return this;
}
IExecute IErrorProcessor.Log(string msg)
{
mode = ProcessMode.Log;
_msg = msg;
return this;
}
IExecute IErrorProcessor.DoNothing()
{
mode = ProcessMode.None;
return this;
}
IExecute IErrorProcessor.ShowMessage()
{
mode = ProcessMode.ShowMessage;
return this;
}
IExecute IErrorProcessor.ShowMessage(string msg)
{
mode = ProcessMode.ShowMessage;
_msg = msg;
return this;
}
IExecute IErrorProcessor.Assert()
{
mode = ProcessMode.DebugAssert;
return this;
}
IExecute IErrorProcessor.Assert(string msg)
{
mode = ProcessMode.DebugAssert;
_msg = msg;
return this;
}
#endregion
}
///<summary>
/// 处理模式。
///</summary>
[Flags]
public enum ProcessMode
{
///<summary>
/// 不做任何处理。
///</summary>
None = 0,
///<summary>
/// 在控制台中打印日志。
///</summary>
Log = 1,
///<summary>
/// 显示消息框。
///</summary>
ShowMessage = 2,
///<summary>
/// 抛出异常。
///</summary>
ThrowException = 4,
/// <summary>
/// 显示Debug.Assert
/// </summary>
DebugAssert = 8
}
/// <summary>
/// 参数检查错误。
/// </summary>
[Serializable]
public class ParamException : Exception
{
/// <summary>
/// 初始化<see cref="ParamException"/>的实例。
/// </summary>
/// <param name="msg">错误消息。</param>
public ParamException(string msg)
: this(msg, null)
{
}
/// <summary>
/// 初始化<see cref="ParamException"/>的实例。
/// </summary>
public ParamException()
: this(string.Empty, null)
{
}
/// <summary>
/// 初始化<see cref="ParamException"/>的实例。
/// </summary>
/// <param name="msg">错误消息。</param>
/// <param name="innerException">内部异常。</param>
public ParamException(string msg, Exception innerException)
: base(string.Format(null, "未通过参数检查:{0}", msg), innerException)
{
}
/// <summary>
/// 用序列化数据初始化 <see cref="ParamException"/> 类的新实例。
/// </summary>
/// <param name="info">它存有有关所引发异常的序列化的对象数据</param>
/// <param name="context">它包含有关源或目标的上下文信息</param>
protected ParamException(SerializationInfo info, StreamingContext context)
: base(info, context)
{
}
}
}