Error string in catch block?

Question

i have the following code which show error from a string when there is a error

is there any way that i can make this in catch block?

  main()
    {
    try
    {
    if (a==1)
    {
     string = "error1"
    }
    elseif (a==2)
    {
     string = "error2"
    }
    }
    }
    catch (e)
    {


    }

Like below:

i have the following code which show error from a string when there is a error

is there any way that i can make this in catch block?

main()
{
try
{
}
}

catch (e)
{

if (a==1)
{
 string = "error1"
}
elseif (a==2)
{
 string = "error2"
}

}

Answer 1

You're making an absolute hash of the syntax I'm afraid. I suggest that before anything else you go read the MSDN article on try-catch statements. The syntax and semantics of exception handling should then start to make sense.

Answer 2

Why would you want to put logic into a catch block?

You should read up on exception handling to see what the correct syntax is, and why you would use it in the first place.

http://www.csharp-station.com/Tutorials/lesson15.aspx

A good book on c# might also be useful, you could try Essential C# as it is useful for beginners...

Answer 3

This is not the right way to use exception handling. Exceptions should be exceptional, and not used for conditional logic.

All you need is your if ... else block.

Answer 4

Even though it is an improper version, it may well answer your question:

    try {

        if (a == 1) {
            throw new Exception("error1");
        } else if (a == 2) {
            throw new Exception("error2");
        }

    } catch (Exception ex) {
        Console.WriteLine("Errormessage = " + ex.Message);
    }

Answer 5

You probably want to do something like this.

 try {

 if(a == 1) {throw new Exception("Erorr1");}

 if(a == 2) {throw new Exception("Erorr2");}

 } catch(Exception e) {
   /*Do something with exception or look below */
 }

Here you raise an error by throwing an Exception that is served in catch clause

or this

try{
 /*Some code that cause an Exception*/
} catch(Exception e) { //Exception describe the type which wold be caught. 

 string errorType = String.Empty;

 var a = -1; //Assign to it smtg from e that You want to check

 if(a == 1) {
   errorType = "erro1";
 }
 else  if (a == 2) {
   errorType = "erro2";
 }

 /* More Your code*/

}

hire You do something with error type that You caught.

But first of all read about something that You want to use in Your code.

Answer 6

Read up on Baseball Exception Handling and why not to do it.