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' BEGIN USER CONSTANTS
' To just use a DSN, the format is shown on the next line:
'Const DSN_NAME = "DSN=ASP101email"
' Two other samples I used it with. Left in as syntax examples for DSN-less connections
'Const DSN_NAME = "DBQ=C:\InetPub\wwwroot\asp101\samples\database.mdb;Driver={Microsoft Access Driver (*.mdb)};DriverId=25"
'Const DSN_NAME = "DBQ=C:\InetPub\database\donations.mdb;Driver={Microsoft Access Driver (*.mdb)};DriverId=25"
Dim DSN_NAME
DSN_NAME = "DBQ=" & Server.MapPath("db_dsn.mdb") & ";Driver={Microsoft Access Driver (*.mdb)};DriverId=25;"
Const DSN_USER = "username"
Const DSN_PASS = "password"
' Ok, I know these are poorly named constants, so sue me!
' This script can be used without actually setting up a DSN, so
' DSN_NAME as well as the other two constants should really be named
' something more generic like CONNECTION_STRING, CONNECTION_USER, and
' CONNECTION_PASS, but I did it this way without really thinking about
' it and I'm too lazy to change it now. If it bothers you, you do it!
' END USER CONSTANTS
' BEGIN SUBS & FUNCTIONS SECTION
Sub OpenConnection
Set objDC = Server.CreateObject("ADODB.Connection")
objDC.ConnectionTimeout = 15
objDC.CommandTimeout = 30
objDC.Open DSN_NAME, DSN_USER, DSN_PASS
End Sub
Sub OpenRecordset(sType)
Dim sSqlString ' as String - building area for SQL query
Dim sCritOperator ' as String - basically "=" or "LIKE"
Dim sCritDelimiter ' as String - parameter delimiter "", "'", or "#"
Set objRS = Server.CreateObject("ADODB.Recordset")
Select Case sType
Case "ListTables" ' Open RS of the Tables in the DB
Set objRS = objDC.OpenSchema(adSchemaTables)
Case "ViewTable" ' Open the Selected Table
objRS.Open "[" & sTableName & "]", objDC, adOpenForwardOnly, adLockReadOnly
Case "DrillDown" ' Open the Recordset built by the selected options
' Build Our SQL Statement
sSqlString = "SELECT * FROM [" & sTableName & "]"
' If we're limiting records returned - insert the WHERE Clause into the SQL
If sCritField <> "" Then
' Figure out if we're dealinh with Numeric, Date, or String Values
Select Case iCritDataType
Case adSmallInt, adInteger, adSingle, adDouble, adDecimal, adTinyInt, adUnsignedTinyInt, adUnsignedSmallInt, adUnsignedInt, adBigInt, adUnsignedBigInt, adBinary, adNumeric, adVarBinary, adLongVarBinary, adCurrency, adBoolean
sCritOperator = "="
sCritDelimiter = ""
Case adDate, adDBDate, adDBTime, adDBTimeStamp
sCritDelimiter = "#"
Case adBSTR, adChar, adWChar, adVarChar, adLongVarChar, adVarWChar, adLongVarWChar
sCritOperator = "LIKE"
sCritDelimiter = "'"
End Select
sSqlString = sSqlString & " WHERE [" & sCritField & "] " & sCritOperator & " " & sCritDelimiter & sCritValue & sCritDelimiter
End If
' If we're sorting - insert the ORDER BY clause
If sSortOrder <> "none" Then
sSqlString = sSqlString & " ORDER BY [" & sSortField & "] " & sSortOrder
sSqlString = sSqlString & ";"
' Open the actual Recordset using a Forward Only Cursor in Read Only Mode
objRS.Open sSqlString, objDC, adOpenForwardOnly, adLockReadOnly
Sub CloseRecordset
objRS.Close
Set objRS = Nothing
Sub CloseConnection
objDC.Close
Set objDC = Nothing
Sub WriteTitle(sTitle)
Response.Write "<H2>" & sTitle & "</H2>" & vbCrLf
Sub WriteTableHeader
Response.Write "<TABLE BORDER=1>" & vbCrLf
Sub WriteTableRowOpen
Response.Write "<TR>" & vbCrLf
Sub WriteTableCell(bCellIsTitle, sContents)
Response.Write vbTab & "<TD>"
If bCellIsTitle Then Response.Write "<B>"
Response.Write sContents
If bCellIsTitle Then Response.Write "</B>"
Response.Write "</TD>" & vbCrLf
Sub WriteTableRowClose
Response.Write "</TR>" & vbCrLf
Sub WriteTableFooter
Response.Write "</TABLE>" & vbCrLf
' END SUBS & FUNCTIONS SECTION
' BEGIN RUNTIME CODE
' Before I start with the run-time code, let me clear up a few things.
' I've tried (and succeeded I think!) to keep all the actual HTML
' formatting contained within Subs. Hence things should be relatively
' consistent as well as being easy to change if you say want a larger
' border or perhaps a table background color or whatever...
' This, along with my attempts to try and keep my sanity, have resulted
' in a rather large proportion of Sub/Function Calls to actual code.
' Since I'm sure this is probably confusing to many newcomers to ASP
' and/or VB, I've attempted to preface each call with the optional
' Call command. Also any SUB or FUNCTION whose name starts with the
' word "Write" is basically just an encapsulation of some variation of
' a Response.Write command, while the remainder of the name represents
' whatever it happens to write.
' IE. WriteTableRowClose writes the tags used to end (or close) a table row
' The actual HTML is (as usual) pretty vanilla flavored. If you want
' rocky-road or mint ting-a-ling (a marvelous piece of ice cream
' craftsmanship I might add), you'll need to edit the Write functions.
' Just be aware of the fact that any change to a SUB will affect ALL
' uses of it, so check the code before you try and make a change to
' just one cell and end up changing them all!
' Okay enough of my rambling......Onwards to the Code!!!
Dim objDC, objRS ' DataConnection and RecordSet
Dim I ' As Integer - Standard Looping Var
Dim strTemp ' As String - Temporary area for building long strings
Dim sAction ' As String - Action String to choose what to do
Dim sTableName ' As String - ...so we know what to do it to
Dim sSortField ' As String - Field to sort by
Dim sSortOrder ' As String - ...ASC or DESC
Dim sCritField ' As String - Field for DrillDown
Dim sCritValue ' As String - ...Value to compare to
Dim iCritDataType ' As Integer - so we know how to compare
' Note to all you programmers out there!
' IE4 broke this code when my QueryString was named parameter because
' it was converting the ¶ to the Paragraph sign even though it was
' in the middle of a word and there was no trailing ;. It works great
' in Netscape. Here's another case where IE's efforts to make things
' foolproof ruined the asp code!
' Get all the parameters we'll need
sAction = Request.QueryString("action")
If sAction = "" Then sAction = "ListTables"
sTableName = Request.QueryString("tablename")
sSortField = Request.QueryString("sf")
Select Case LCase(Request.QueryString("so"))
Case "asc"
sSortOrder = "ASC"
Case "desc"
sSortOrder = "DESC"
Case Else
sSortOrder = "none"
sCritField = Request.QueryString("cf")
If Len(sCritField) = 0 Then sCritField = ""
sCritValue = Request.QueryString("cv")
iCritDataType = Request.QueryString("cdt")
If Len(iCritDataType) <> 0 And IsNumeric(iCritDataType) Then iCritDataType = CInt(iCritDataType)
' Start the actual DB work
' Code common to all choices.
Call OpenConnection
Call OpenRecordset(sAction)
Select Case sAction
Case "ShowDataConnectionProperties" ' Cool to look at but not really part of the sample!
' Fake it out so we don't have problems closing the DB
OpenRecordset("ListTables")
' Get all the DataConn Properties
For I = 0 to objDC.Properties.Count - 1
Response.Write I & " " & objDC.Properties(i).Name & ": " & objDC.Properties(I) & "<BR>" & vbCrLf
Next 'I
Case "ListTables"
Call WriteTitle("Tables")
If Not objRS.EOF Then objRS.MoveFirst
Call WriteTableHeader
Call WriteTableRowOpen
Call WriteTableCell(True, "Table Name")
Call WriteTableRowClose
Do While Not objRS.EOF
If objRS.Fields("TABLE_TYPE") = "TABLE" Then
Call WriteTableCell(False, "<A HREF=""./db_dsn.asp?action=ViewTable&tablename=" & Server.URLEncode(objRS.Fields("TABLE_NAME")) & """>" & objRS.Fields("TABLE_NAME") & "</A>")
objRS.MoveNext
Loop
Call WriteTableFooter
Case "ViewTable", "DrillDown" ' The same here but in the OpenRecordset SUB they're very different.
Call WriteTitle(sTableName)
For I = 0 to objRS.Fields.Count - 1
' Build heading - the "sort by" links
' Was all on the line WriteTableCell line but I split it up for readability
' Field name for the heading
strTemp = objRS.Fields(I).Name
' Begin Anchor for the + Sign
strTemp = strTemp & " (<A HREF=""./db_dsn.asp"
' Set action
strTemp = strTemp & "?action=DrillDown"
' Set table name to current table
strTemp = strTemp & "&tablename=" & Server.URLEncode(sTableName)
' Set criteria field to whatever it currently is
strTemp = strTemp & "&cf=" & Server.URLEncode(sCritField)
' Set criteria value to whatever it currently is
strTemp = strTemp & "&cv=" & Server.URLEncode(sCritValue)
' Set criteria data type to this fields' data type
strTemp = strTemp & "&cdt=" & iCritDataType
' Set sort field to this field
strTemp = strTemp & "&sf=" & Server.URLEncode(objRS.Fields(I).Name)
' Set sort order to this ascending (hence the +)
strTemp = strTemp & "&so=asc"">+</A>"
' End Anchor for the + Sign
' Begin Anchor for the - Sign
' Next 8 lines are basically the same as above except for the sort order (so)
strTemp = strTemp & "/<A HREF=""./db_dsn.asp"
strTemp = strTemp & "&so=desc"">-</A>)"
' End Anchor for the - Sign
Call WriteTableCell(True, strTemp)
If IsNull(objRS.Fields(I).Value) Or objRS.Fields(I).Value = "" Or VarType(objRS.Fields(I).Value)= vbNull Then
strTemp = " "
Else
' These set the drill down values which get passed if you click on any value
strTemp = "<A HREF=""./db_dsn.asp"
strTemp = strTemp & "&cf=" & Server.URLEncode(objRS.Fields(I).Name)
strTemp = strTemp & "&cv=" & Server.URLEncode(objRS.Fields(I).Value)
strTemp = strTemp & "&cdt=" & objRS.Fields(I).Type
strTemp = strTemp & "&sf=" & Server.URLEncode(sSortField)
strTemp = strTemp & "&so=" & sSortOrder & """>"
strTemp = strTemp & objRS.Fields(I).Value
strTemp = strTemp & "</A>"
Call WriteTableCell(False, strTemp)
' Close Data Access Objects and free DB variables
Call CloseRecordset
Call CloseConnection
' END RUNTIME CODE
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