DB/Reporting :: Creating A RecordSet?
May 2, 2008
I am starting to design in Visual Studio 2008 and I am designing a web application that connects to a SQL database. In VB6 I could create a record set and read its contents as follows.
SQLCommand = "SELECT * FROM Tablename WHERE field = '" & data & "'"
Recordset.Open SQLCommand, Database, adOpenDynamic
If Recordset.EOF = True Then
MsgBox "Record does not exist!", , "Record does not exist"
End If
Then I would Bind the fields data to, say a text box like this
Textbox.Text=Recordset("Field1")
I am finding dificult to do this in Visual Studio 2008. Does anybody know how to create a recordset in Visual Basic 2008 as described above.I have been reading a lot, watching traing videos, and researching on the Internet and I have not found any source which will explain how to do it.
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May 1, 2008
I am trying to use sql to select a row and then find the minimum and maximum values in the row, do some preprocessing, update the recordset using in visual basic 6.0, and then go ahead select the second row, find the minimum and maximum values again.. and go on, until the last row.
The problem is I am having difficulties using sql select for a ROWS.. I am aware how to do this for COLUMNS.. if I want to extract the first row from a recordset, find the min max values, and then, extract the second row and so on.. how will it be possible? (discouraged to use VBA, since i am limited to VB only)..
Here is an example of my recordset:
Code:
Col1Col2Col3Col4Col5
0.43530.05630.74350.92510.0325
0.28430.00320.82430.73250.9981
This example only lists two rows currently. I want to extract the minimum and maximum values from each row at a time, and then the second row. The reason for extracting minimum and maximum values is because I want to normalize my data in the range from 0 to 1.
Logic: After I find the min and maximum values for each row, I will use the recordset back, read the same row, and update every columns entry with my normalized data value... then proceed to the next row and do the same for every row in my database.
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Jan 6, 2009
I am attempting to run an update query on a Microsoft Access Database File and am not having any luck with the update. It appears to update the RecordSet but not the actual Access Database (when I run the following code, close the debug window, then re-open it a field referring to the Count_Value column reflects the update). I am using Microsoft Visual Basic 2008 Express to work with this code, if that is of any interest. If you could look through the code below and see what is causing the RecordSet to update but not the actut
Code:
Dim strDBpath As String
strDBpath = Application.StartupPath & "CourseData.mdb"
[code].....
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Jan 8, 2009
I am writing an application in VB.Net, the application stores a number of images within the database and therefore the SQL database size gets quite large. At the moment I use a single database, however what I want to do is create a new database for each project within my application. I need some advise on the best way to proceed with this and also the best way to be able to create a new database for each project. Below is the approach that I was planning to adopt:
1. When the application is installed it automatically has a common database that comes with the application and this database is attached to the SQL Server, lets call this application "AppA" and common database "AppADB" Within the AppADB there would be a table called projectsTbl and in this projectsTbl it has a 2 columns called "projectDesc" and "projectDB". projectDesc would hold the description of a project and then the projectDB would hold the SQL database name for that project.
2. The user would login to my application and in the admin side of the application have a create project form. In this form he would enter the project description and also a 3 character code for the project. When the user OK's the form it would take the project descrption from the form and put this in the "projectDesc' field in the AppADB and then take the 3 character code from the form add this as a prefix to "AppADB" and put this within the "projectDB" field within the AppADB e.g. if the 3 character code was "SIM" then the projectDB name would be "SIMAppADB"
3. What I obviously now need to do is create a new database called "SIMAppADB" now what I was thinking was I could create a SQL database backup of a database that has the standard database structure that is required and then I can restore this .bak file (which would be in my application installed directory) to this new name, using the following code:
Code:
RESTORE DATABASE SIMAppDB
FROM DISK = 'C:Program FilesAppA Installed DirectoryDB.Bak'
WITH REPLACE, MOVE SIMAppDB_Data' TO 'C:MSSQLDATASIMAppDB_Data.MDF',
MOVE 'SIMAppDB_Log' TO 'C:MSSQLDATASIMAppDB_Log.LDF'
4. Then when the user logins to my application again, on the login screen he will see a list of projects from the "projectsTbl" table in the "AppADB" database. The user can then select the project they wish to login to and from this the application and extract the database name from the "projectDB" table in the "AppADB" database. I then can store this database name in my application and when the application needs to connect to the database it modifies the connection string to connect to the respective database.
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Aug 2, 2009
I'm trying to create a database driven application using VS 2008. I want my database to be generic, i.e it shouldn't rely on the existence of MS Access or similar application. So how do I create such a database, add tables , values..etc?
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Jul 1, 2008
I'm trying to write code to create a new database and then create tables within the database.
I'm running into a strange problem right now, which is the fact that I was able to create a new database ok on either the regular SQL Server instance, or the SQLEXPRESS instance. However, when I attempted to create a table, I got an error message saying that there is already a table of the same name.
When I tried to connect to the new database via SQL Server Management Studio, I could see the database. However, there are no tables in it! So, theoretically, I'm creating a brand new blank DB, so there should not be anything in this DB, right? and I should be able to create any tables I want in it!
Here is the code that I have so far:
[code...]
I just have one simple form with a button on it. The click event on this button calls the CreateAllDBs() routine.
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Aug 4, 2008
I have looked around google and downloaded several program with no luck. I have a Microsoft Access 2000 DB which my web app connects to and now published the website with a MS SQL Server DB 5.0. I need to create the tables on it but its not deeming easy. The closest thing I got the creating SQLfor creating the tables was:
[Code]...
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Dec 20, 2011
I am trying to load a crystal report from two tables but it seems that is not working.Here is the code to load the crystal report:
Code:
Private Sub InvoiceLoad(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
[code]......
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Jun 2, 2008
An order can have many OrderDetails, and a Product can be on many different orders. The OrderDetail table just has the OrderID and productID, so there is essentially a many-to-many between order and product).I have a form for the user to enter a new order. I want to have an unbound box that contains the names of all the products, and to be able to drag these names into a box under the order, to add a new OrderDetail record using the productID of the dragged order along with our orderID.
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Mar 2, 2010
I am using VS 2008 standard edition to develop my first windows form application and it does not come with crystal components. I nedd to design few reports but I can't find any help on the net. In my vba application I create one form which accepts all parameters and based on parameter I build SQL statement and pass it to report data source. I would like to similar in vb.net, but all I see is cryatal. Can I create reports without Crystal?
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Jul 5, 2008
I'm looking for some simple code that lets me create a Microsoft Access table via code.Currently all I do in Access is write and retrieve data from specific tables but now I want to be able to create them at runtime. Here is an example of the code I use to load some data just so you can get a feel of what I'm currently doing. Hopefully there is an easy way using the same rough way that I'm currently dealing with databases.
Code:
Public Sub LoadCareer()
Public rs As New ADO
[code]....
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Feb 16, 2012
I was hoping to save some coding by using views to access my forms in VBInstead of using a very long query I was hoping to use
Code:
Select * FROM my_view
[code].....
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Jul 15, 2009
How do you change an ADODB recordset to ADO.Net recordset?
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Nov 25, 2009
I am creating a small admin reporting tool that gathers certain information on some PCs. Unfortuantly the user that is running the tool doesnt have access and I cant give access to those particular machines. What I have done is created a user on these machines that can get this information.I would like to then have the reporting tool run certain parts of the code as this user so the information can be obtained, without any intervention from the user running the tool. Can I hardcode this user into the code so that it runs the code as the user?
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Feb 8, 2009
use the following code to create a database in ms access
Code:
'reference: Microsoft ActiveX Data Objects 2.8 Library
'reference: Microsoft ADO Ext. 2.8 for DDL and Security
[code].....
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Mar 31, 2011
I am creating a reporting app that pulls information off of a Sql database and populates the data in a datagridview control (DVG). I am using tab pages (Tabcontrol), and I have about 10 tabs with within the control. What I have done is created a dynamic control that will populate in each tab page once the tab is selected. I am using a split container and in my split container.panel 1 is where all my buttons and search functionality will be. In my split container.panel2 to is where the main DGV control will be. I have got this to function properly, however now I am unable to add anything to my split container.panel1. I would like to add diffrent labels and buttons in the panel1 one without putting another panel on top of the split container.panel1, and also if i do this when I resize my container the panel will just sit there. I am using the selected index changed event to get my split container to show in each of the diffrent tabs
Private Sub searchTab_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles searchTab.SelectedIndexChanged
searchTab.TabPages(searchTab.TabPages.IndexOf(searchTab.SelectedTab)).Controls.Add(splitContainer1)
[code]...
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May 5, 2010
I am using .rdlc Microsoft Reporting reports. I have a form with one reportviewer on it. What I want to use is a combo box where they select the report and then click generate, and it shows a specific report. I have this code so far that changes the report:
[Code]...
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May 23, 2011
why this recordset is read only?
Sub PopMainForm()
Dim rst As ADODB.Recordset
Dim con As ADODB.Connection
[code].....
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Jun 29, 2009
I get the following error when open the recordset: run-time error '-2147217904 (80040e10)' Method 'open' of object '_Recordset' fieldHow to solve the problem
Dim CONN As New ADODB.Connection
Dim RS As New ADODB.Recordset
CONN.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & App.Path &
[code].....
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May 4, 2012
I used to work in VB.net and used Dataset's all the time when working with ADO, but now i'm Working in C# and the Research is showing me a lot of Recordsets.
Are they the same thing?
If no what is the difference?
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Oct 15, 2009
how to negotiate a dataset via:
For Each dRow In quanDS.Tables(0).Rows
'do something to each row
Next
I now need to figure out now to loop through a subset of the records returned in the dataset - here's a VB6 example I need to convert:
strSQL = "select * from tblDQ order by xid, xcode, xDOS"
rsMaster.Open strSQL, conDB, adOpenDynamic, adLockOptimistic
rsMaster.MoveFirst
[code]....
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Dec 1, 2009
I added a bindingsource and set the datamember to a table (in access) which has two fields. My bindingsource name is M and the field is usersT. how do i get its value?I tried:
dim tmp as string
tmp=M.item("usersT")
but this doesn't work.
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Feb 1, 2012
I have an application in VB6 that joins 3 tables together to create 1 record set and I am able to use the move next and move previous methods to navigate through the record set.
I am having trouble creating this same scenario in vb.net with a data set. Do I have to create each table individually and then link them together somehow or can I join them all together in a query before I fill the data set?
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Jun 9, 2011
I have a continious Form which opens and shows records of people with whatever criteria the user had chosen the screen before. When the form opens it checks which button was pressed and then changes the recordsource of the continious form.
When I try to edit the records it says "Recordset not updateable". I have done everything I can think of, I have change the type of recordset from dbopensnapshot to dbopendynaset.
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Jul 21, 2009
VB6 code:
Private Sub Command1_Click()
Dim ccw As New ReceiveRecordsetFromVB6_VBNET.Class1
Dim rs As New ADODB.Recordset
rs.CursorType = adOpenStatic
rs.CursorLocation = adUseClient
[Code]...
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Feb 11, 2009
How to sort a recordset using vb 6.0 coding?
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Jun 9, 2010
In this code i have a problem
Dim db As Database
Dim r As Recordset
Dim holder As string
Set db = OpenDatabase("c:database.mdb")
Set r = db.OpenRecordset("record1")
r.movefirst
[Code]...
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Apr 14, 2010
To retrieve data from MS Access database I was using the following code to create a new Recordset. How can we declare it in VS 2008?
Public rs As New ADODB.Recordset
Set MSHFlexGrid1.DataSource = rs
Are the following codes above possible in VS2008?
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Jan 28, 2010
Can i use SQLDataReader instead of a Recordset. I want to achieve the following result in an SQLDataReader.
Dim dbConn As New ADODB.Connection
Dim rs As New ADODB.Recordset
Dim sqlstr As String = "SELECT Name,Status FROM table1 WHERE id=" +
[Code].....
can i replace recordset with SQLDataReader and if I can can you please show me the changes in code.
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May 27, 2009
how to create a recordset in ado.net?
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