how to rename files before send files?

I'm using script task to rename files inside foreach loop files,code like shown below

Dim file As New System.IO.FileInfo(CStr(Dts.Variables("User::FileName").Value))

dim newname as string = Split(file.Name, "_")(0) & ".jpg"
Dts.Variables("User::outputname").Value = file.DirectoryName & "\" & newname

Then,i use ftp task to send files,but prompt "the variables User::outputname doesn't contains file path(s)"

I tried to use file system task to perform that,but failed either

Rename file operation in file system only can rename a file in a specified location,who can help me?

TIA

Have you looked at what outputname does contain? Does the file specified exist as it should for the FTP task?

The File System Task can use variables, which themselves can be used to supply expressions, see the EvaluateAsExpression property and set the Expression property. This way you can use dynamic paths in the File System Task.

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