Exception.Data 属性

定义

命名空间:

System

程序集:

netstandard.dll, System.Runtime.dll

Source:

Exception.cs

获取键/值对的集合，这些键/值对提供有关该异常的其他用户定义信息。

C#

public virtual System.Collections.IDictionary Data { get; }

属性值

IDictionary

一个对象，它实现 IDictionary 接口并包含用户定义的键/值对的集合。 默认值为空集合。

示例

以下示例演示如何使用 Data 属性添加和检索信息。

C#

// This example demonstrates the Exception.Data property.
using System;
using System.Collections;

class Sample
{
   public static void Main()
   {
      Console.WriteLine("\nException with some extra information...");
      RunTest(false);
      Console.WriteLine("\nException with all extra information...");
      RunTest(true);
   }

   public static void RunTest(bool displayDetails)
   {
      try {
         NestedRoutine1(displayDetails);
      }
      catch (Exception e) {
         Console.WriteLine("An exception was thrown.");
         Console.WriteLine(e.Message);
         if (e.Data.Count > 0) {
            Console.WriteLine("  Extra details:");
            foreach (DictionaryEntry de in e.Data)
               Console.WriteLine("    Key: {0,-20}      Value: {1}",
                                 "'" + de.Key.ToString() + "'", de.Value);
         }
      }
   }

   public static void NestedRoutine1(bool displayDetails)
   {
      try {
         NestedRoutine2(displayDetails);
      }
      catch (Exception e) {
         e.Data["ExtraInfo"] = "Information from NestedRoutine1.";
         e.Data.Add("MoreExtraInfo", "More information from NestedRoutine1.");
         throw;
      }
   }

   public static void NestedRoutine2(bool displayDetails)
   {
      Exception e = new Exception("This statement is the original exception message.");
      if (displayDetails) {
         string s = "Information from NestedRoutine2.";
         int i = -903;
         DateTime dt = DateTime.Now;
         e.Data.Add("stringInfo", s);
         e.Data["IntInfo"] = i;
         e.Data["DateTimeInfo"] = dt;
      }
      throw e;
   }
}
// The example displays the following output:
//    Exception with some extra information...
//    An exception was thrown.
//    This statement is the original exception message.
//      Extra details:
//        Key: 'ExtraInfo'               Value: Information from NestedRoutine1.
//        Key: 'MoreExtraInfo'           Value: More information from NestedRoutine1.
//
//    Exception with all extra information...
//    An exception was thrown.
//    This statement is the original exception message.
//      Extra details:
//        Key: 'stringInfo'              Value: Information from NestedRoutine2.
//        Key: 'IntInfo'                 Value: -903
//        Key: 'DateTimeInfo'            Value: 7/29/2013 10:50:13 AM
//        Key: 'ExtraInfo'               Value: Information from NestedRoutine1.
//        Key: 'MoreExtraInfo'           Value: More information from NestedRoutine1.

注解

有关此 API 的详细信息，请参阅 Exception.Data 的补充 API 备注。

适用于

另请参阅

• DictionaryEntry