Open XML SDK Open and Save not working - asp.net

Question

I am having trouble with the Open XML SDK opening and saving word documents.
I am using the following code (VB.Net):
Try
'Set Path
Dim openPath As String = "../Documents/" & worddoc
Dim savePath As String = "\\web-dev-1\HR_Documents\" & worddoc
Using doc As WordprocessingDocument = WordprocessingDocument.Open("/Documents/" & worddoc, True)
'Employee Name Insert
'Find first table in document
Dim tbl1 As Table = doc.MainDocumentPart.Document.Body.Elements(Of Table).First()
'First Row in tbl
Dim row As TableRow = tbl1.Elements(Of TableRow)().ElementAt(0)
'Find first cell in row
Dim cell As TableCell = row.Elements(Of TableCell)().ElementAt(0)
'Insert selected Employee Name
Dim p As Paragraph = cell.Elements(Of Paragraph)().First()
Dim r As Run = p.Elements(Of Run)().First()
Dim txt As Text = r.Elements(Of Text)().First()
txt.Text = ddlEmployeeList.SelectedItem.Text
'Save File
'Supervisor Name Insert
'Find second table in document
Dim tbl2 As Table = doc.MainDocumentPart.Document.Body.Elements(Of Table).First()
'First Row in tbl
Dim row2 As TableRow = tbl2.Elements(Of TableRow)().ElementAt(0)
'Find first cell in row
Dim cell2 As TableCell = row2.Elements(Of TableCell)().ElementAt(0)
'Insert selected Employee Name
Dim p2 As Paragraph = cell2.Elements(Of Paragraph)().First()
Dim r2 As Run = p2.Elements(Of Run)().First()
Dim txt2 As Text = r2.Elements(Of Text)().First()
txt2.Text = ddlSupervisorList.SelectedItem.Text
End Using
Return 1
Catch ex As Exception
Return Nothing
End Try
The trouble starts on the first using statement. It throws the following error:
Could not find a part of the path 'C:\Documents\Hourly_Employee_Performance_Review .docx
I have placed the word documents in a folder of the ASP.NET site called Documents. I also have created a public share on the dev server to see if maybe that would help.
The problem is that it doesn't use the supplied path variable. I have gone through the documentation for OPEN XMl SDK but all it talks about is the Using Statement and its need and use for it.
Can anyone tell me, show me, or point to a site that has examples of how to set both the open path and save path?

Answer 1

You need a path to the file which is based on the filesytem, not a URL. You can do that with
Dim openPath As String = Path.Combine(Server.MapPath("~/Documents"), worddoc)
And then to open the file:
Using doc As WordprocessingDocument = WordprocessingDocument.Open(openPath, True)
It appears that you will need to do the same for the location to save to, but you didn't say if "\\web-dev-1" is a different server; if it were that would need other considerations.
(Not tested, some typos may exist. You will need an Imports System.IO.)