C # Exception Handling

C # Exception Handling

1, C # all Exception Handling are consideredClass, All exceptions are causedSystem. ExceptionDerived from.

2 , error handling in C # Exception management keywords commands have four commands: try , catch, throw, finally , there are four keywords written exception The processing function is very powerful and convenient.

3 . syntax for exception handling: try { Code }< span style =" Background: lime; color: blue "> catch ( Exception Handling statement ( Declare the catch section to capture any type of exception error . You do not need to declare it, in this way, the catch will catch any type of exception errors.) { Exception Handling Program Code (when catch after an exception error is caught , the use the corresponding program code )} Note: Catch is used to catch exception errors generated in try-catch. You can create Multiple catch blocks to capture different types of exception errors.

3 , C # common exception classes:

class	description
outofmemoryexception	when a memory allocation fails to be initialized using the new keyword
stackoverflowexception	when the execution program is advantageous for using Stack resources (usually executing recursion or too many loops ), when stack resources are exhausted
nullreferenceexception	when you want to use the reference object, it is nullreference
typeinitializationexception	if an error occurs to a static object, but the catch section is missing for processing and response time
arraytypemismatchexception	when the stored data is different from the data type in the array
indexoutofrangeexception	when the range of the array is exceeded
multicastnotsupportedexception	When merging two delegate objects fails
arithmeticexception	generally: 12pt; Background: Aqua; color: Blue "> operation failed , this includes dividebyzeroexception and overflowexception
dividebyzeroexception	when division is used, when the denominator is 0,
overflowexception	when the operation exceeds the valid range of data types