Welcome to OStack Knowledge Sharing Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
526 views
in Technique[技术] by (71.8m points)

ms access - VBA hanging on ie.busy and readystate check

I am trying to grab some football player data from a website to fill a privately used database. I've included the entire code below. This first section is a looper that calls the second function to fill a database. I've run this code in MSAccess to fill a database last summer and it worked great.

Now I am only getting a few teams to fill before the program gets hung up at

While IE.Busy Or IE.ReadyState <> READYSTATE_COMPLETE: DoEvents: Wend

I've searched countless websites regarding this error and tried changing this code by putting in sub function to wait a period of seconds or other work-arounds. None of those solve the issue. I've also tried running this on multiple computers.

The first computer made it through 3 teams (or three calls of the 2nd function). The second slower computer makes it through 5 teams. Both eventually hang. The 1st computer has Internet Explorer 10 and the second has IE8.

Sub Parse_NFL_RawSalaries()
  Status ("Importing NFL Salary Information.")
  Dim mydb As Database
  Dim teamdata As DAO.Recordset
  Dim i As Integer
  Dim j As Double

  Set mydb = CurrentDb()
  Set teamdata = mydb.OpenRecordset("TEAM")

  i = 1
  With teamdata
    Do Until .EOF
      Call Parse_Team_RawSalaries(teamdata![RotoworldTeam])
      .MoveNext
      i = i + 1
      j = i / 32
      Status("Importing NFL Salary Information. " & Str(Round(j * 100, 0)) & "% done")
    Loop
  End With


  teamdata.Close               ' reset variables
  Set teamdata = Nothing
  Set mydb = Nothing

  Status ("")                  'resets the status bar
End Sub

Second function:

Function Parse_Team_RawSalaries(Team As String)

    Dim mydb As Database
    Dim rst As DAO.Recordset
    Dim IE As InternetExplorer
    Dim HTMLdoc As HTMLDocument
    Dim TABLEelements As IHTMLElementCollection
    Dim TRelements As IHTMLElementCollection
    Dim TDelements As IHTMLElementCollection
    Dim TABLEelement As Object
    Dim TRelement As Object
    Dim TDelement As HTMLTableCell
    Dim c As Long

   ' open the table
   Set mydb = CurrentDb()
   Set rst = mydb.OpenRecordset("TempSalary")

   Set IE = CreateObject("InternetExplorer.Application")
   IE.Visible = False
   IE.navigate "http://www.rotoworld.com/teams/contracts/nfl/" & Team
   While IE.Busy Or IE.ReadyState <> READYSTATE_COMPLETE: DoEvents: Wend
   Set HTMLdoc = IE.Document

   Set TABLEelements = HTMLdoc.getElementsByTagName("Table")
   For Each TABLEelement In TABLEelements
       If TABLEelement.id = "cp1_tblContracts" Then
            Set TRelements = TABLEelement.getElementsByTagName("TR")
            For Each TRelement In TRelements
                If TRelement.className <> "columnnames" Then
                    rst.AddNew
                    rst![Team] = Team
                    c = 0
                    Set TDelements = TRelement.getElementsByTagName("TD")
                    For Each TDelement In TDelements
                        Select Case c
                            Case 0
                                rst![Player] = Trim(TDelement.innerText)
                            Case 1
                                rst![position] = Trim(TDelement.innerText)
                            Case 2
                                rst![ContractTerms] = Trim(TDelement.innerText)
                        End Select
                        c = c + 1
                    Next TDelement
                    rst.Update
              End If
          Next TRelement
      End If
  Next TABLEelement
  ' reset variables
  rst.Close
  Set rst = Nothing
  Set mydb = Nothing

  IE.Quit
End Function
See Question&Answers more detail:os

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Answer

0 votes
by (71.8m points)

In Parse_Team_RawSalaries, instead of using the InternetExplorer.Application object, how about using MSXML2.XMLHTTP60?

So, instead of this:

Set IE = CreateObject("InternetExplorer.Application")
IE.Visible = False
IE.navigate "http://www.rotoworld.com/teams/contracts/nfl/" & Team
While IE.Busy Or IE.ReadyState <> READYSTATE_COMPLETE: DoEvents: Wend
Set HTMLdoc = IE.Document

Maybe try using this (add a reference to "Microsoft XML 6.0" in VBA Editor first):

Dim IE As MSXML2.XMLHTTP60
Set IE = New MSXML2.XMLHTTP60

IE.Open "GET", "http://www.rotoworld.com/teams/contracts/nfl/" & Team, False
IE.send

While IE.ReadyState <> 4
    DoEvents
Wend

Dim HTMLDoc As MSHTML.HTMLDocument
Dim HTMLBody As MSHTML.htmlBody

Set HTMLDoc = New MSHTML.HTMLDocument
Set HTMLBody = HTMLDoc.body
HTMLBody.innerHTML = IE.responseText 

I've generally found that MSXML2.XMLHTTP60 (and WinHttp.WinHttpRequest, for that matter) generally perform better (faster and more reliable) than InternetExplorer.Application.


与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome to OStack Knowledge Sharing Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

...