в 15:31, 26 мая 2010

2010-05-26T15:31:53Z

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2010-05-26T12:19:20Z

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==Check OverflowException for long==

<source lang="csharp">using System;
class MainClass
{
static void Main(string[] args)
{
int MyInt = 12345000;
long MyLong = MyInt;

try
{
long c = checked(MyLong * 5000000);
}
catch (OverflowException e)
{
Console.WriteLine(e);
}
}
}</source>

==Define exception variable in catch statement: DivideByZeroException==

<source lang="csharp">using System;
class MainClass
{
static void Main()
{
try
{
int y = 0;
y = 10/y;
} catch (DivideByZeroException e) {
Console.WriteLine("Message: {0}", e.Message);
Console.WriteLine("Source: {0}", e.Source);
Console.WriteLine("Stack: {0}", e.StackTrace);
}
}
}</source>
<pre class=codeResult>Message: Attempted to divide by zero.
Source: main
Stack: at MainClass.Main()</pre>

==Generate an index out-of-bounds exception==

<source lang="csharp">using System;

class MainClass {
public static void Main() {
int[] nums = new int[4];

try {
Console.WriteLine("Before exception is generated.");

// Generate an index out-of-bounds exception.
for(int i=0; i < 10; i++) {
nums[i] = i;
Console.WriteLine("nums[{0}]: {1}", i, nums[i]);
}

Console.WriteLine("this won"t be displayed");
}
catch (IndexOutOfRangeException) {
// catch the exception
Console.WriteLine("Index out-of-bounds!");
}
Console.WriteLine("After catch statement.");
}
}</source>
<pre class=codeResult>Before exception is generated.
nums[0]: 0
nums[1]: 1
nums[2]: 2
nums[3]: 3
Index out-of-bounds!
After catch statement.</pre>

==Handle ArgumentOutOfRangeException==

<source lang="csharp">using System;
using System.Collections;
using System.Runtime.rupilerServices;
[assembly: RuntimeCompatibility(WrapNonExceptionThrows = false)]
public class MainClass
{
static void Main() {
try {
ArrayList list = new ArrayList();
list.Add( 1 );
Console.WriteLine( "Item 10 = {0}", list[10] );
}
catch( ArgumentOutOfRangeException x ) {
Console.WriteLine( x );
Console.WriteLine( "ArgumentOutOfRangeException Handler" );
}
catch( Exception x ) {
Console.WriteLine( x );
Console.WriteLine( "Exception Handler" );
}
catch {
Console.WriteLine( "An exception I was not expecting..." );
Console.WriteLine( "Unexpected Exception Handler" );
}
finally {
Console.WriteLine( "Cleaning up..." );
}
}
}</source>
<pre class=codeResult>System.ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the s
ize of the collection.
Parameter name: index
at System.Collections.ArrayList.get_Item(Int32 index)
at MainClass.Main()
ArgumentOutOfRangeException Handler
Cleaning up...</pre>

==Throwing Exceptions: ArgumentNullException==

<source lang="csharp">using System;
class MainClass
{
static void Main()
{
string arg = null;

try
{
if (arg == null)
{
ArgumentNullException MyEx = new ArgumentNullException();
throw MyEx;
}
}
catch (ArgumentNullException e)
{
Console.WriteLine("Message: {0}", e.Message);
}
}
}</source>
<pre class=codeResult>Message: Value cannot be null.</pre>

==Use the NullReferenceException.==

<source lang="csharp">using System;

class MainClass {
public static void Main() {
try {
string str = null;
Console.WriteLine(str.ToString());

} catch (NullReferenceException) {
Console.WriteLine("NullReferenceException!");
Console.WriteLine("fixing...\n");

}

}
}</source>
<pre class=codeResult>NullReferenceException!
fixing...</pre>

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в 15:31, 26 мая 2010

Admin: 1 версия