Goal Seek In Access

Oct 25, 2011

I'm trying to write a code in visual basic to perform the Excel version of Goal Seek in Access, When I wrote the code, wich included the formula below to do the goalseek function, it gives me an error and identifies the"Range" in the "ChangingCell" segment of the formula as a problem.I am using two text boxes (Text210 and Text495); one that contains the data and the other box for the results.[code]

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What Happened To Seek With Access Files

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In VB3, I could open an Access file, select the table, specify the index and read a record in just that many lines. [code] If the customer's phone number was stored in Access as Phone, once the seek command was implemented, it was available as HeaderTb(Phone)In this example, OE was short for Order Entry, and the database contained the header files for all orders.I worked through the oft-cited tutorial to pick up the basics for database control, but it provides a means for the user to look over and work with records.But what if my application was more of a relational database? How do I instruct VB10 to access a record by its key and how do I use the data it comes back with?

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i have posted a question in below thread how to work with (i mean connect to a access database)....

[URL]

I could able to navigate through records but, i want to seek a particular record and  update accordingly.....

when i used find method i am getting an error as below

"Table doesn't have a primary key."

But my database has a primary key.

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here the code I use to read data,

vbnet
Dim sr As New StreamReader("C:outDoom.txt")
While sr.Peek <> -1
 
[code]....

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[Code]...

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region_streamReader =
file.OpenText(
WORLD_REGIONS_FILEPATH )
region_line = region_streamReader.readLine()

[Code]...

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Dim MyFile As New FileInfo(File) Dim fs As New FileStream(File, FileMode.Open, FileAccess.ReadWrite)
For x = 0 To RecLength - 1
fs.Seek(ConvertRecNumToByte + x, SeekOrigin.Begin)
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Str SQL = "SELECT* FROM student WHERE stdno = '"& txtstdno.Text &"'"
oledbcon.open()
ry

[code].....

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SO now I'm attempting to get the value from getting the control and send message it.[code]...

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I have a program in VB.NET 2005. At some point I have to open an Access2003-Application for getting data in it. I do that by pretending my program is a human user and let it do all the work in Access as a human user would do. Filling Fields, pressing buttons etc. I use the Primary Interop Assemblies for that. So far so good. That code is in use for over half a year now. In the last week I got Office 2007 installed on my machine. Of course I tested the installed version of my program if everthing still works. Every test was succesfull. But if I do the same tests in Visual Studio it always crashes.

All I get is this Errormessage: {"Das COM-Objekt des Typs "Microsoft.Office.Interop.Access.FormClass" kann nicht in den Schnittstellentyp "Microsoft.Office.Interop.Access._Form3" umgewandelt werden. Dieser Vorgang konnte nicht durchgefhrt werden, da der QueryInterface-Aufruf an die COM-Komponente fr die Schnittstelle mit der IID "{66B22FB4-F70E-4F03-A00A-F76E9ADBBF10}" aufgrund des folgenden Fehlers nicht durchgefhrt werden konnte: Schnittstelle nicht untersttzt (Ausnahme von HRESULT: 0x80004002 (E_NOINTERFACE))."}

For all who can't read german:

"Microsoft.Office.Interop.Access.FormClass" can't be converted in to "Microsoft.Office.Interop.Access._Form3" ... Interface is not supported.

Code I use:

Dim access As Microsoft.Office.Interop.Access.Application = Nothing
.
.
.
access = New Microsoft.Office.Interop.Access.Application()

[CODE]...

The Error occurs when I try to access any property of "access.Forms("frmTest")"

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Here's my code:

<%@Page language="vb" explicit="true" debug="true"%>
<%@Import Namespace="System.Data"%>
<%@Import Namespace="System.Data.OleDb"%>

[CODE]...

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Imports System.Data.OleDb
Partial
Class Form1

[code]....

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Here is a example of how I did the connection:

Public AccessOLEDBConnString= "Provider=Microsoft.Jet.OLEDB.4.0; Data Source=" & myfullpath & ";Jet OLEDB:Database Password=password"

Function getConnection() As OleDb.OleDbConnection

[CODE]...

And when I want to have access at the data I'm doing like this:

dim conn as Oledb.OledbConnection

dim sql as string

dim ds as Dataset

[CODE]...

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My previous connectionstring before i deploy it was this

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CODE:

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[Code]...

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[Code]...

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[code]
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