SSIS Validate a Foreach File Enumerator

Question

i have a ssis project, to start with, i have a Foreach File Enumerator and inside it are multiple tasks. It works flawlessly under normal circumstances, however if there is no file present in the enumerator directory, an error occurs, the question is, how can i make a validation or some sort for it to avoid it throwing an error on runtime? thanks

img links

ssis http://s15.postimage.org/l41py15aj/ssis.png error http://s15.postimage.org/rj0qupc0b/ssiserror.png

Answer 1

You can have a script task before Foreach loop which basically checks for files and directory .Then have a precedence constraint to halt the package if either directory or files is not present .

Create 3 variables

 Name        DataType   
 Directory   String
 Files       String
 Exists      int

In the script task just check if the directory is present along with the files .You can modify the code if you need to even enumerate the subfolders or check if specific files are present in the folder

if (Directory.Exists(Dts.Variables["User::Files"].Value.ToString()))
{
if (Directory.GetFiles(Dts.Variables["User::Files"].Value.ToString()).Length != 0)
    {
      Dts.Variables["User::Exists"].Value = 1;
     }
            else
            {
                Dts.Variables["User::Exists"].Value = 0;
            }
        }
        else 
        {
            Dts.Variables["User::Exists"].Value = 0;
        } 

In the precedence constraint check the value for the variable Exists

    Evaluation operation : Expression
    Expression           : @Exists==1 

Update :

In the script task editor you need to add the variables in the ReadOnlyVariable section in the script tag