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How to maintain the list of all the exceptions in a List<> object in C#?

Posted on 2011-09-06
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Last Modified: 2012-05-12
Hi,

I need to maintain a list of all exceptions in a List<> object. In the attached code below, I have a method 'Import' which will invoke another method 'SetField' in a for loop and I need to be able to capture any exceptions and continue with invoking the 'SetField' for the rest of the items. In the calling program, I need to check if there are any errors as below. But I am not able to access the list 'ErrorMessages' on the 'errors' object in the calling program. I am missing something here. Can anybody please provide any suggestions? Thank you.

//Calling program
Fields f = new Fields();
f.Import();
if(errors.ErrorMessages.Count > 0)
{
//loop through each message here.
}
public class Exceptions
    {
        List<string> ErrorMessages = new List<string>();

        public void Add(string field, int instance, string error)
        {
            ErrorMessages.Add(string.Format("Error '{0}' occured while setting the field {1} and instance {2}", error, field, instance));
        }
    }


class Fields
{

public Exceptions errors { get; set; }

public void Import()
{
	
	foreach(var item in fields)
	{
		try
		{
			SetField(item.field, item.instance)
		}
		catch(Exception x)
		{
			errors.Add(item.field, item.instance, x.Message)	
		}
	}
}

}

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0
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Question by:ipjyo
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5 Comments
 
LVL 75

Accepted Solution

by:
käµfm³d   👽 earned 500 total points
ID: 36493027
Add a property to access the data:

public class Exceptions
{
    private List<string> ErrorMessages = new List<string>();

    public void Add(string field, int instance, string error)
    {
        ErrorMessages.Add(string.Format("Error '{0}' occured while setting the field {1} and instance {2}", error, field, instance));
    }
    
    public List<string> Errors { get { return this.ErrorMessages } }
}

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Then you would access it like this:
errors.Errors.Add(item.field, item.instance, x.Message)

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0
 
LVL 75

Assisted Solution

by:käµfm³d 👽
käµfm³d   👽 earned 500 total points
ID: 36493031
Correction to the "access" example--it doesn't quite fit your code:
foreach (string err in errors.Errors)
{
    Console.WriteLine(err);
}

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0
 

Author Comment

by:ipjyo
ID: 36495884
Thank you. Also, I am trying to add error messages using the property of type 'Exceptions' as below.

public Exceptions errors { get; set; }

errors.Add(item.field, item.instance, x.Message)      

Also, I will need to access this property to look for the errors in a different assembly as below. But I am not able to access the property 'Errors' of type <List>. The intellisense is showing only the property 'errors' but not the poperty defined in 'Exceptions'.

//Calling assembly
Fields f = new Fields();
f.Import();
if(errors.Errors.Count > 0)
{
//loop through each message here.
}

class Fields
{

public Exceptions errors { get; set; }

public void Import()
{
	
	foreach(var item in fields)
	{
		try
		{
			SetField(item.field, item.instance)
		}
		catch(Exception x)
		{
			errors.Add(item.field, item.instance, x.Message)	
		}
	}
}

}

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0
 

Author Comment

by:ipjyo
ID: 36495912
I am sorry. my bad. I am able to access the property 'Errors' from a different assembly. Please ignore my previous comment.

Thanks for your help.
0
 
LVL 75

Expert Comment

by:käµfm³d 👽
ID: 36496149
NP. Glad to help  = )
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