C# InvalidCastException類代碼示例

本文整理匯總了C#中System.InvalidCastException類的典型用法代碼示例。如果您正苦於以下問題：C# InvalidCastException類的具體用法？C# InvalidCastException怎麽用？C# InvalidCastException使用的例子？那麽, 這裏精選的類代碼示例或許可以為您提供幫助。

InvalidCastException類屬於System命名空間，在下文中一共展示了InvalidCastException類的5個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的C#代碼示例。

示例1: Main

//引入命名空間
using System;

public class Example
{
   public static void Main()
   {
      bool flag = true;
      try {
         IConvertible conv = flag;
         Char ch = conv.ToChar(null);
         Console.WriteLine("Conversion succeeded.");
      }   
      catch (InvalidCastException) {   
         Console.WriteLine("Cannot convert a Boolean to a Char.");
      }
      
      try {
         Char ch = Convert.ToChar(flag);
         Console.WriteLine("Conversion succeeded.");
      }   
      catch (InvalidCastException) {   
         Console.WriteLine("Cannot convert a Boolean to a Char.");
      }
   }
}

開發者ID:.NET開發者，項目名稱:System，代碼行數:26，代碼來源:InvalidCastException

輸出：

Cannot convert a Boolean to a Char.
Cannot convert a Boolean to a Char.

示例2: Main

//引入命名空間
using System;

public class Person
{
   String _name;
   
   public String Name 
   { 
      get { return _name; }
      set { _name = value; }
   }
}

public class PersonWithId : Person
{
   String _id;
   
   public string Id
   {
      get { return _id; }
      set { _id = value; }
   }
}

public class Example
{
   public static void Main()
   {
      Person p = new Person();
      p.Name = "John";
      try {
         PersonWithId pid = (PersonWithId) p;
         Console.WriteLine("Conversion succeeded.");
      }   
      catch (InvalidCastException) {
         Console.WriteLine("Conversion failed.");
      } 
      
      PersonWithId pid1 = new PersonWithId();
      pid1.Name = "John";
      pid1.Id = "246";
      Person p1 = pid1;
      try {   
         PersonWithId pid1a = (PersonWithId) p1;
         Console.WriteLine("Conversion succeeded.");
      }   
      catch (InvalidCastException) {
         Console.WriteLine("Conversion failed.");
      } 
      
      Person p2 = null;
      try {   
         PersonWithId pid2 = (PersonWithId) p2;
         Console.WriteLine("Conversion succeeded.");
      }   
      catch (InvalidCastException) {
         Console.WriteLine("Conversion failed.");
      } 
   }
}

開發者ID:.NET開發者，項目名稱:System，代碼行數:61，代碼來源:InvalidCastException

輸出：

Conversion failed.
Conversion succeeded.
Conversion succeeded.

示例3: Main

//引入命名空間
using System;
using System.Globalization;

public class Example
{
   public static void Main()
   {
      var culture = CultureInfo.InvariantCulture;
      IFormatProvider provider = culture;
      
      DateTimeFormatInfo dt = (DateTimeFormatInfo) provider;
   }
}

開發者ID:.NET開發者，項目名稱:System，代碼行數:14，代碼來源:InvalidCastException

輸出：

Unhandled Exception: System.InvalidCastException: 
Unable to cast object of type //System.Globalization.CultureInfo// to 
type //System.Globalization.DateTimeFormatInfo//.
at Example.Main()

示例4: Main

//引入命名空間
using System;

public class Example
{
   public static void Main()
   {
      object value = 12;
      // Cast throws an InvalidCastException exception.
      string s = (string) value;
   }
}

開發者ID:.NET開發者，項目名稱:System，代碼行數:12，代碼來源:InvalidCastException

示例5: Main

//引入命名空間
using System;

public class Example
{
   public static void Main()
   {
      object value = 12;
      string s = value.ToString();
      Console.WriteLine(s);
   }
}

開發者ID:.NET開發者，項目名稱:System，代碼行數:12，代碼來源:InvalidCastException

輸出：

注：本文中的System.InvalidCastException類示例由純淨天空整理自Github/MSDocs等開源代碼及文檔管理平台，相關代碼片段篩選自各路編程大神貢獻的開源項目，源碼版權歸原作者所有，傳播和使用請參考對應項目的License；未經允許，請勿轉載。