pzozulka
asked on
C#: How to manually throw exceptions
The code I'm working with has an existing try catch block. The catch block is below. In the try block, I need to manually throw an exception if a condition is met.
catch (Exception ex)
{
...
ImportStatus.Append(ex.Mes
...
}
What is the correct way to throw an exception? Will this work? The reason I ask is because the catch block seems to accept a single parameter of type Exception. But I'm passing a string, so that's why I'm a bit confused on how to properly throw an exception with a string message.
catch (Exception ex)
{
...
ImportStatus.Append(ex.Mes
...
}
What is the correct way to throw an exception? Will this work? The reason I ask is because the catch block seems to accept a single parameter of type Exception. But I'm passing a string, so that's why I'm a bit confused on how to properly throw an exception with a string message.
string errorMsg = "This is an error.";
throw new Exception(errorMsg);ASKER
Right, but what if I say the following in the try block:
throw new Exception("Address length is too long");ASKER CERTIFIED SOLUTION
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ASKER
This is an existing try catch block that I'm not allowed to alter at the moment as it has nothing to do with the requested code/functionality changes.
Having said that, I'm a bit rusty with exceptions. Kyle, I'm not sure what you meant by
If my catch block only accepts a single parameter, as in: catch(Exception ex), then how is it that passing a string by doing: throw new Exception(string) works?
Having said that, I'm a bit rusty with exceptions. Kyle, I'm not sure what you meant by
Note that the first string is the exception message,.
If my catch block only accepts a single parameter, as in: catch(Exception ex), then how is it that passing a string by doing: throw new Exception(string) works?
ASKER
In other words, it seems that the catch method is expecting a parameter of type Exception, but my Throw call sends a parameter of type string. How does this work?
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eg
try
{
int x = 0;
int y = 10 / x;
}
catch (Exception ex)
{
//ex will be divide by 0 generated by the second line.
}
You can create your own exceptions if you have custom classes, throwing them for others to catch.