How To Index FoxPro Table Linked In MS Access
Sep 10, 2009
I have a foxpro table <b> INVENT.DBF</b> linked in MS ACCESS. When I tried to do a search in the table from vb.net application, it is taking a long time. So I want to index the foxpro table and then use it for search.
Here is the sample code I wrote in vb.net <i>
cn = New OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=D:database.mdb;Persist Security Info=False")
cn.open()
cmd = New OleDbCommand("Create INDEX itmno_idx ON INVENT(ITEM_NO) ", cn)
cmd.ExecuteNonQuery()</i>
But I am getting error "Cannot execute data definition statements on linked data sources"
What needs to be done to index a linked foxpro table using VB.NET.
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Nov 20, 2009
As part of a larger application, I need to IMPORT (not link) a FoxPro 2.6 DBF into a Access DB.I toyed with using a Access MODULE and in the module, using the docmd.TransferDatabase method.I have looked for days at different samples and I cannot seem to find the answer.This application is intended to be distributed with NO ASSURANCE the user will have the FoxPro OLE driver installed. Knowing that the ODBC driver will most likely be installed as part of MDAC, it is pretty safe to use the ODBC driver that is already installed - Visual FoxPro Tables
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Oct 4, 2011
a simple question which i couldn't find an answer on the web.
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Jun 27, 2012
My Application ( Vb.Net) is to scan Access DB forms and find out the Activx control if present and it works fine. But my problem is.In some DBs we have tables with mapping path to specific locations (Table Property->Linked Table Manager) and when we relocate these DBs then we need to change the path manually otherwise it will show a message to re-link ( Access DB message) while opening the DB. And I am facing same problem while scanning through my Tool as well and my process stops, continue only by manual intervention.
Do I capture the massage event and send some user specific message to user in the Log file or Report and continue scanning further?
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Jan 23, 2012
I am writing a small program to update data in a SharePoint list. Now where I cannot develop or use applications for SharePoint unless I am on a SharePoint server, I thought I would cheat the system by using Access to link to SharePoint lists, and then use Visual Basic to play with the Access tables. I need additional functionality other than what VBA can provide me, so that is why I am using the VB layer.Is it possible that this is not permitted? Whenever I try to update an item in the table, I receive the message:
"cannot update '(expression)'; field not updatable"
The word 'expression' here is not a filler I added, this is the actual error.If I try to make the edit manually in the table using Access, it works fine (I haven't tried it through Access VBA yet...).
How my code works is this:I have a Dataset added to the project which connects to the Access database. I add one of the tables to the dataset and create a Class object to reference the table adapter (essentially a Data Access Layer). I can read all of the data fine, and when a change is made in SharePoint, my application sees the updates when it refreshes. But when I try to write back to the table I get the error message above.
For
Each r As
DataRow In TableAdapter.GetData.Select("Name LIKE '*" & FileName &
"*'")
[code]....
There are other columns in the table and some of them have default null values. I only want to update these two fields, but it almost seems like this is not possible. I thought I might be somehow opening the Dataset in a Read Only mode, but I can't seem to find that option anywhere.
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Apr 30, 2011
First timer here, I love the site!
Running:
- VS 2008
- Sharepoint 3.0
- Access 2007
- Windows Vista (The machine I'm developing it from)
History: (Do excuse me if I don't reference different methods I've taken so far correctly, I'm still learning!) I am building some search software for a law firm that I work for in Australia. It's all coming along really well, but I seem to have hit a snag getting data out of sharepoint lists and into my project!
I first attempted to add a web reference to sharepoint and after a while was able to pull in all of the data from the lists, fantastic!(OR NOT!). The issue then was when I attempted to load it up into an array using XMLNodes, whilst it loaded up fine and I could see all the data, if there was a null value in one of the columns, it wouldn't pull that null value across, therefore, I couldn't really use the data...
[Code]...
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Jun 12, 2012
I'm trying to connect foxpro table (dbf) to VB.NET. I'm trying to display the records of that table to listview in VB.NET. Here is my code:I got an error message here, the error says "cannot open the file"
Imports System.Data.SqlClient
Imports System.Data.OleDb
Public Class Form3
[code]....
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Nov 24, 2009
I want to create an index on a foxpro table. I used the following command
Code:fcn = New ADODB.Connection fcn.ConnectionString = "provider=VFPOLEDB.1;Data Source=" & tablefolderpath fcn.Open() fcn.Execute("INDEX on D:myfoldersales.dbf (BRAND)")But i get Command contains unrecognized phrase/keyword. message
I am trying to index on the brand field of sales.dbf table?
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May 4, 2010
I think what I have here is an environmental issue. When I attempt to fill a dataset from a VFP table I am getting an error message that says "Index Not Found". The reason I feel its environmental is because the process was working perfectly fine last week. The client I am trying to run this program for runs it once per month to integrate one of their FoxPro systems with SQL. It's been in working order since November of last year, but suddenly now I'm getting this error. Some things I have looked at already are updating VFP drivers for both OleDB and ODBC.
'--- FOX variables
Dim cnFOX As OleDbConnection
Dim cmdFOX As OleDbCommand
[code].....
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Feb 18, 2011
I am an old VB2 programmer and in the process of moving up. In VB2 I could obtain a data row via and index on an access table. I can not find an example on how to do this. I can retrieve a single row using a query, but an index would be faster. I know in Oracle use can use a hirt to direct the query to use the index.Here is what I was during in VB2 (Sample) with no hint.
Set Stock_Tbl = "DataBaseName".openTable(Stock_Tbl_Name)
Stock_Tbl.Index="Symbol_Idx"
Stock.Tbl.Seek="MSFT"
[code]....
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Jul 2, 2009
I have a large form that is set up from master-detail datasets in Visual Studio 2008.I havene master table with a large amount of detail tables. Several of the detail tables also have detail tables linked.Now I need to add a master table that sits on top of my existing master table making it a detail table.
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Feb 17, 2009
i am using vb/vb.net and the database is visual foxpro 6.0 then i want to create the tables from the application using sql statement.i need to add the number field into the table. i can not add the number field in the tableres.open "CREATE TABLE Customer ( CustName char(50), CustId int(2))",conXavier
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Jan 9, 2012
I have a large number of MS Access databases that I'm automating to relink tables. However, there is one table that can't be relinked normally as Access says it has too many indexes. A manual work-around is to link to the view in SQL Server (2000/2008) and rename that table.Now, I want to do this programatically (I'm using DAO to relink the tables, which works nicely). I've been looking at CreateTableDef, but I don't know if this is the right way of going about it. I don't want to hardcode 260+ fields that may change (this is the main table from a 3rd party vendor, so I have no control over the fields in this table, or any normalization for that matter, but that's another topic...).Also, 98% of the tables being changed are Access 2000/2003 tables. The other 2% are Access 2007/2010.[code]
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Nov 17, 2009
I have an MS access database with some .dbf files linked to it. One of the dbf file is a sales file. I am trying to generate a report for each of the month's sales. For that the sales dbf file will be different for each of the month. I want to give an option to the user to specify the file name from which he wants to use to generate the report. After accepting the input from the user, i need to link to that table in MSACCESS. Is there a way to achieve this from vb.net
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Aug 22, 2011
I am trying to update a table across "non" linked SQL servers using:C# or VB.net and ADO.net sqlDataAdapter.
I need to use DataTables and sqlDataAdapter.Very Important I need to use BatchUpdate and avoid looping through the DataTable
The table designs in Server 1 differ from table design in Server 2.
Source Table
Server 1. Table 1
ID INT[code]....how to update table 2 on server 2 using a sqlDataAdapter, or alternative batch method?
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Nov 22, 2010
Currently I have DataGridView box, clicking generate button fills it with a query from the database.I want the add button to add another row filled using the same query, so far I cannot get it to do it.Current generate button code:
Me.TableAdapter.FillBy1(Me.DataSet.App)
Add button code:
Me.DataSet.App.Rows.Add() - this does add a new empty row
I tried sticking the generate code inside (between add brackets) it but that just did the same thing as the generate code.
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Mar 30, 2009
I have started a little program which is linked to an access database, and it basically allows the user to input a name and a picture, with the file path stored in a text box and the picturebox getting the picture location from said text box. At the moment I am using the BindingNavigator to go between data. Everything works fine, however, whenever I press previous or next, the picturebox loads up the picture using the file location of the previous datas picture field. How can I tweak this so that when I press next or previous it loads the picture into the picturebox using the file location of the data I am going to, not coming from? [code]
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Aug 26, 2009
I know how to do the type of query in this thread [URL] I am wondering know how to do the same thing with linked datatables.
Or is there no difference, i just don't need to have "Where" clauses?If you're not living on the edge, you're taking up too much room
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Apr 9, 2009
I need to load a list of tables and linked tables in an MS Access Database into a combo box. I have this.
vb.net Imports System.Data.OleDb
[Code]...
1. How do I load the access tables and the link tables into my combo without the system tables showing up?
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Dec 26, 2009
Im building a program that's linked to a ms access database. the function i use to update a row... In order to save a lot of typing i inserted a for loop that uses a directcast function. i did this because i have numerous text boxes that i name tb1, tb2, tb3, tb4...etc and they each correlate with row 1, row 2, row 3, row 4...etc in the database.[code].....
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Sep 10, 2009
I'm using VB 2008 Express SP1. Is it possible to create an entity model that links to an MS Access (MDB) file?
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Apr 14, 2011
I have a system that gathers raw data from electronic devices, uses that data to populate a set of tables and allow uses to add/edit certain data and report on it. (Kind of basic right...NOT) There are 3 applications that I've written that use the same database.
One is a client that is on 3-4 user machines which allows them to see the data that has come in and work with it.
Two a Data-to-Information process program which takes the raw data, checks up certain information and puts the results into the database.
Third is a data gathering app that interfaces directly with the electronic devices and about 10 times per day places the raw data into a single table in the database.
If a user is in the 'client' application the data processing application crashes all over the place:
1. Database file already in use.
2. Unrecognised Database format
3. File locked exclusively by User on PC X.
Almost always on a different line of code and once when I made it retry over and over I managed to corrupt the database and had to Compact and Repair it to fix it. If no one is using the client everything works perfectly. On each client machine is a database with linked tables to the server machine. The machine that is running the Data processing is the server and the processing is using a database in a different folder that also has linked tables.
I have gone through all the recordsets in the Data Processing application and made sure that they are only using ForwardOnly and Read Only. They edit the data only with Insert, Update or Delete queries. I'm about to do the same in the Client Application as it seems to be the one that is locking everything all the time. The client machines haven't crashed on that error at all. Does it matter which version of Access is on the client and server machines? (All the clients have Access 2003 and the server has 2007 but the Database was created in 2003). Should I just convert the Access database to SQL server and be done with it?
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May 20, 2010
I am writing an application that does a number of different things with data downloaded from hardware which is monitoring the power used in my home and produced by my PV Solar array. I have run into a roadblock early on, because I cannot seem to get new data into an Access database that I have linked to my application by means of a DataSet. I have checked the DataAdapter's InsertCommand, DeleteCommand, and UpdateCommand definitions (created by the DataSet Wizard), and they seem to make sense, and nothing is throwing exceptions or otherwise making VB complain, but new rows added to the dataset are not being added to the database.
[Code]...
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Feb 19, 2008
I have code that connects to queries in an access database.
[code...]
Is the data not filling in because of the schema information not being retirieved? If so, is there a way around that?
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Aug 30, 2009
I want to add a new table in my accdb and copy the content tfrom an existing table into the new one.
Is there an easy way to do this?
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Sep 2, 2009
I want to create an index on my table. I used the following command Code:
cn = New OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=D:database.mdb;Persist Security Info=False")
cn.Open()
cmd = New OleDbCommand("Create INDEX itmno_idx ON INVENT (ITEM_NO)", cn)
cmd.ExecuteNonQuery()
Now I want to use this. Is there a file created with some extension when i do an Indexing?. Is the above statment actually index the field, ITEM_NO or do i have to use ALTER TABLE command? Currently I am getting error "Cannot execute data definition statements on linked data sources"
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Jan 10, 2011
I add a new record into my access table using.
Dim comm As New OleDbCommand("INSERT INTO SaleInfo VALUES ('" & ListBox1.Text & "', '" & TextBox1.Text & "', '" & TextBox2.Text & "')", Con)
comm.ExecuteNonQuery()
How can you add a new row at a certain index in the table?
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Feb 3, 2011
<p style="margin:0cm 0cm 0pt"><span style="font-family:Calibri; font-size:small">Im Anhang finden Sie ein VB-Programm zur Reproduzierbarkeit des Fehlers „Data Table Internal Index Is Corrupted 5".</span></p><p style="margin:0cm 0cm 0pt"><span style="font-family:Calibri; font-size:small">Folgende Schritte sind durchzuführen:</span></p><p style="margin:0cm 0cm 0pt"><span style="font-family:Calibri; font-size:small">Entzippen in ein geeignetes Verzeichnis</span></p><p style="margin:0cm 0cm 0pt"><span style="font-
[code]....
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Jul 15, 2011
I'm, using a SQL Server table in a DataGridView and I'm having trouble adding records. I'm new to vb.net but used vb6 for a lot of years so the transition is a little difficult. For now I'm just trying to add a record using a button click but the record key which is setup as integer and to automatically increment by 1 shows as -1 after the record is created. While the data does show in the grid it is never actually posted in the table. Once created I want to select the record just entered.
Here's what I have:
' Declare
Private addedRowIndex As Integer
Code:
Dim newMessagesRow As ArcadeDataSet.messagesRow
newMessagesRow = ArcadeDataSet.messages.NewmessagesRow
newMessagesRow.movie_title = "Added Programmatically"
[Code].....
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Jan 17, 2011
Has anybody ran into this error before?
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