Csharp/C Sharp/Development Class/Buildin Exceptions
Содержание
- 1 Argument Null Exception
- 2 IndexOutOfRangeException Exception
- 3 InvalidCastException Exception
- 4 NullReferenceException Exception
- 5 OutOfMemoryException Exception
- 6 OverflowException Exception
- 7 StackOverflowException Exception
- 8 Throw and Catch an IO exception because the file zxcvb.data doesn"t exist
- 9 Throw Argument Out Of Range Exception
- 10 Throw Index Out Of Range Exception
- 11 Throw Invalid Operation Exception
- 12 Throw Null reference Exception
Argument Null Exception
<source lang="csharp"> using System; class ArgumentNullTest {
public static void Main() { String[] s = null; String sep = " "; try { String j = String.Join(sep,s); } catch (ArgumentNullException e) { Console.WriteLine("Error: {0}",e); } }
}
</source>
IndexOutOfRangeException Exception
<source lang="csharp"> using System;
class MainClass {
public static void Main() { try { int [] IntegerArray = new int [5]; IntegerArray[10] = 123; // wait for user to acknowledge the results Console.WriteLine("Hit Enter to terminate..."); Console.Read(); } catch(IndexOutOfRangeException) { Console.WriteLine("An invalid element index access was attempted."); } }
}
</source>
InvalidCastException Exception
<source lang="csharp"> using System;
class MainClass {
public static void Main() { try { MainClass MyObject = new MainClass(); IFormattable Formattable; Formattable = (IFormattable)MyObject; // wait for user to acknowledge the results Console.WriteLine("Hit Enter to terminate..."); Console.Read(); } catch(InvalidCastException) { Console.WriteLine("MyObject does not implement the IFormattable interface."); } }
}
</source>
NullReferenceException Exception
<source lang="csharp"> using System;
class MyClass {
public int Value;
}
class MainClass {
public static void Main() { try { MyClass MyObject = new MyClass(); MyObject = null; MyObject.Value = 123; // wait for user to acknowledge the results Console.WriteLine("Hit Enter to terminate..."); Console.Read(); } catch(NullReferenceException) { Console.WriteLine("Cannot reference a null object."); // wait for user to acknowledge the results Console.Read(); } }
}
</source>
OutOfMemoryException Exception
<source lang="csharp">
using System;
class MainClass {
public static void Main() { int [] LargeArray; try { LargeArray = new int [2000000000]; } catch(OutOfMemoryException) { Console.WriteLine("The CLR is out of memory."); } }
}
</source>
OverflowException Exception
<source lang="csharp"> using System;
class MainClass {
public static void Main() { try { checked { int Integer1; int Integer2; int Sum; Integer1 = 2000000000; Integer2 = 2000000000; Sum = Integer1 + Integer2; } } catch(OverflowException) { Console.WriteLine("A mathematical operation caused an overflow."); } }
}
</source>
StackOverflowException Exception
<source lang="csharp">
using System;
class MainClass {
public static void Main() { try { Recursive(); } catch(StackOverflowException) { Console.WriteLine("The CLR is out of stack space."); } } public static void Recursive() { Recursive(); }
}
</source>
Throw and Catch an IO exception because the file zxcvb.data doesn"t exist
<source lang="csharp"> using System.IO; public class IoError {
public static void Main() { StreamReader f; try{ f = new StreamReader("DoesNotExist.data"); }catch(IOException e) { System.Console.WriteLine(e); } f = new StreamReader("DoesNotExist.data"); }
}
</source>
Throw Argument Out Of Range Exception
<source lang="csharp"> using System; using System.Collections; class Class1 {
static void Main(string[] args) { try { // Display the first 200 chars from the connection string Console.WriteLine("asdf".Substring(1, 200)); } catch (Exception objE) { Console.WriteLine(objE.ToString()); } }
}
</source>
Throw Index Out Of Range Exception
<source lang="csharp"> using System; using System.Collections; class Class1 {
static void Main(string[] args) { long[] longException = new long[2]; try { longException[2] = 5; } catch (Exception objE) { Console.WriteLine(objE.ToString()); } }
}
</source>
Throw Invalid Operation Exception
<source lang="csharp"> using System; using System.Collections; public class InvalidOpExample {
public static void Main() { int[] array = {0,0}; IEnumerator enumerator = array.GetEnumerator(); Console.Write("{0}",enumerator.Current); }
}
</source>
Throw Null reference Exception
<source lang="csharp"> using System; using System.Collections; class Class1 {
static void Main(string[] args) { Exception objException = new Exception(); try { objException = null; Console.WriteLine(objException.Message); } catch (Exception objE) { Console.WriteLine(objE.ToString()); } }
}
</source>