SSIS Expression To Append Time and Date with File Name Dynamically

Use Following expression to append date and time at the time of package execution with the file name.
[code]
"D:\output\LogFile"
+ (DT_WSTR, 50)(DT_DBDATE)GETDATE()+"#"
+(DT_STR,2,1252)DATEPART("hh",GETDATE())+"-"
+(DT_STR,2,1252)DATEPART("mi" ,GETDATE())+"-"
+(DT_STR,2,1252)DATEPART("ss",GETDATE())
+".txt"
[/code]
Evaluated Expression would look some thing like this:

D:\output\LogFile2012-01-17#12-11-54.txt

Using Variable:

@[User::OutputFileLocation]  : Variable to hold file location

@[User::OutputFileName]  : Variable to hold file name

Expression:
[code]
@[User::OutputFileLocation]
+ @[User::OutputFileName]
+ (DT_WSTR, 50)(DT_DBDATE)GETDATE()+"#"
+(DT_STR,2,1252)DATEPART("hh",GETDATE())+"-"
+(DT_STR,2,1252)DATEPART("mi" ,GETDATE())+"-"
+(DT_STR,2,1252)DATEPART("ss",GETDATE())
+".txt"
[/code]

Hope it Helps :)