Question

I am using ASP.NET/C#.

Here is an example where I am updating some information in database using lambda expression.

try
{
    using (var db = new DataClasses1DataContext())
    {
        var logSubGroup = db.sys_Log_Account_SubGroups
             .SingleOrDefault(subGroup => subGroup.cSubGroupName.Equals(subGroupName));
        logSubGroup.cRejectedBy = rejectedBy;
        logSubGroup.dRejectedOn = DateTime.Now;
        logSubGroup.cAuthorizedStatus = "Rejected";
        db.SubmitChanges();
    }
}
catch (Exception ex)
{
}

As you can see I am not doing anything inside catch() block.

I know this is a terrible way of using try catch.

Can anyone just help me to use try catch block in a correct manner.

I am just clueless as to what must come inside the catch block.

Any suggestions are welcome.

Answer 1

You should ideally handle the error so that your application can recover from it, at the very least though, you should log it. You should never just swallow it. Also, you shouldn’t handle an exception that you don’t expect or can’t handle. For example, when opening a file, a FileNotFoundException can be expected and handled, for example by displaying a warning and letting the user pick another file.