DB/Reporting :: Clearing A Table An Clicking Entries?
Aug 8, 2008
ok i have a dataset with two columns one column is "NAME" the other colulmn is called "URL". The entries in the URL column are displayed as linklabels. So how do i clear the table and save the table: I tried this
[Code]...
it works. it clears the table of all rows but when i close and re-open the program the data shows in the table again (i.e. it isnt cleared so how do you fix this.Also how do i put code into the click event for each linklable in the URL columns?
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Jun 22, 2010
I want to set a certain column to true or false automatically based on what value another column has entered. I managed to get this working by myself using the 'SQL Pane' in VB and testing it by using execute sql but I don't know what to do now. I assumed that I could just save it and it would work from there but that's not the case, it dissapears from the SQL Pane if I close the project (even though it worked fine when I ran the project the first time), so where do I put it/what do I do with it in order to get this to work?
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Sep 2, 2010
I am working on getting a multiple values from a single column displayed in a single textbox or label. I know I should be able to find the information I need online, but I am coming up empty. I am using Visual Studio 2010 with SQL Server 2005. For example, I want to pull all the email addresses, that have a value, from a table and display them together. The output I am looking for is like this:
[Code]....
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Apr 7, 2010
I've never really used SQL before). What I'm trying to do is; I want to set a certain column to true or false automatically based on what value another column has entered. I managed to get this working by myself using the 'SQL Pane' in VB and testing it by using execute SQL but I don't know what to do now. I assumed that I could just save it and it would work from there but that's not the case, it dissapears from the SQL Pane if I close the project (even though it worked fine when I ran the project the first time), so where do I put it/what do I do with it in order to get this to work?
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Feb 23, 2010
do i clear and entire database through the program?
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Jun 20, 2010
I just starting coding in VB.net about two weeks ago so I'm still a begging and I learn best by seeing working code and then adapting it to my situation. That being said, I need help displaying table entries in a listbox. I've successfully created a database in my test application, added it to my Data Sources and used a drag / drop method to add Datagrid View & Details (labels & textboxes) to my application for testing purposes. Now I want to try and display table entries in a listbox.
Example Database:Table: Contact
- ContactID (autonumber) [primary key]
- FirstName (text 50 limit[code]....
Also is there any benefit or down side to creating a database in MS Access, create the relationships & tables, then attaching that database to my application or is it better to create the database in the application like I did in the example above by using the Add New - Service-Based Database option?
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May 25, 2010
I'm looking to retrieve all the entries from one column of an access database table and copy to an array. this array i will then be randomly selecting values from it to create foootball fixtures. I'm confident of being able to achieve the random side of it but i'm struggling to get the records into the array.
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Aug 2, 2010
I familiar with how to populate information from an access table to textboxes but not the other way around. I am familiar with the DataTable class.
I would appreciate any methods whatsoever on how to do this with as much detail as possible since I am not an expert on database connections.
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Jan 9, 2009
I want to do something like this:
Code:
'create a dataset and a table
Dim ds As New DataSet
[code].....
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Nov 29, 2009
I have a program where you have three entries, CD name, artist, price and it goes into a listbox and .txt file when closing. I have to have a message box if you enter the same CD name. I have a code to open the .txt file and compare strings but I need to change it to compare only the CD name and not all three entries. Is there a way to do my string compare against my listbox without opening the .txt file?? The program loads the listbox from the .txt file when opening. Private Sub btnAdd_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnAdd.Click' adds CD information to the list box
' declare variables
Dim strName As String
Dim strArtist As String
Dim strPrice As String
[code].....
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Feb 20, 2011
The SaveFileDialog that opens up while clicking the export button of the CrystalReportViewer by default filters the predefined file types. Is it possible to custom define which files to be filtered?
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Jul 7, 2011
Rather than running numerous queries in Access I am trying to write a front end for a DB2 database. The Access database is getting to a size that it is causing Access 2007 to have reliability issues and frequent compacting is required. I have created the Dataset, the Table Adaptors, and the Connection String already, but when I put in a bit of code in to fill the Table Adaptors the remote connection I have to work is going crazy (chewed up about 180MB before I realised it was pulling data from work).
Before I started the project I copied the .accdb to my local PC HDD and I pointed the connection string to it, but it still looks like it is trying to pull data from the work network. If it was a small database I wouldnt be concerned but it is pulling major data every time I run it. I have only 2 out of the 4 Table Adaptors running and it didnt fill them even after 10 minutes.
Here is the code I was trying to run... Server name has been substituted for Server for obvious work reasons.
Because the tables are so large I was looking for a way to pull only the columns I need to from the tables, I tried adding .SOFT_ID to the first line of code but the TA spat the dummy message below...
Value of type 'System.Data.DataColumn' cannot be converted to Application_Name.DS_DB2Database.Server_SOFTDataTable'.
Code:
Me.TA_ServerSOFT.Fill(Me.DS_DB2Database.ServerSOFT.SOFT_ID)
Me.TA_ServerSOFT_FOUND.Fill(Me.DS_DB2Database.ServerSOFT_FOUND)
Me.TA_ServerHARD.Fill(Me.DS_DB2Database.ServerHARD)
Me.TA_ServerREF_SUP.Fill(Me.DS_DB2Database.ServerREF_SUP)
I would also like to pull just the data columns I need to speed up the query.
Note: In case youre wondering why I am not connecting directly to the DB2 database. I currently dont know where it is stored and while leveraging Access I am trying to put a level of separation between the app and the db for the time being, later I will try connect directly.
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Apr 4, 2009
Instead of connecting to database,I create datacolumns of two data tables.assign foregin key constraints and primary keys to the columns.Add these datatables to dataset and create relationship between them.Now by using RowFilter property,how to display the child table in a datagrid by clicking on parent record in another datagrid?Accept and Award Points Accept as Solution
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Feb 13, 2012
What I'm trying to do is click an html link inside of a html table via code in vb.net using a web-browser control. The link I want to click can be anywhere in the first column of the table so I need to cross reference with another column in the table to make sure I have the re way I'm going about this is to loop through the html elements till I find the table I want (multiple tables on the page) then dump that table to an array. Then loop through the page again get to the table I want and then start comparing the link and another column in the now array. I need to check to make sure that the url of the link contains a work and that another column in the table contains a specific or lower numerical value. Basically where I'm stuck is while dealing with the html element "Table" wanting to identify and interact with another html element inside it.
'Flag to say dump to array
Dim RecordFiles As Boolean = False
'The last two headers in the table are blank so need to skip them
Dim FirstBlank As Boolean = False
Dim SecondBlank As Boolean = False
[Code] .....
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Jun 4, 2011
how can i manually iterate through an entire datatable record by record, but only moving to next record after clicking a button. am using vb 2008 express and below is the code i wrote: Private Sub STARTButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles STARTButton.Click
Dim RealName As String
Dim UserName As String
Dim PASSWORD As String
[code].....
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Jul 10, 2009
database = microsoft access application = microsoft visual studio .net 2003
i have a dataset, i dont know how to hide the rows.
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Nov 29, 2010
I have a database called Houses.mdf , in it is a table called House with ID , NAME , PRICE.
I want to SUM all the PRICES and get a total price of all houses. I also want to display the result in a textbox.
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Jan 5, 2009
I am confused as to why you have to pass the name of the table in the .Fill() method? As an example, see the following code:[code]I have already specified "NameTable" in the query string, so why do I have to put "NameTable" again in the Fill() command?
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Mar 27, 2008
Anyone know how to copy a table from one database to another? I know the statement 'INSERT INTO Table1 SELECT * FROM Table2' but I want to copy from one database to another from a server to a PC. Of course, I could do a select statement for all the records and use a loop to insert them one by one, but surely there is an easier way.
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Jun 4, 2009
I am trying to insert data into two tables on two different forms. My problem is that I don't know how to get the last entered Auto generated ID from the first table to pass it to second form.
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Oct 28, 2008
I am using the following from the MS website to add a row to an access table and retreive the last autogenerated number.
Code:
Dim cnJetDB As OleDbConnection = New OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=test.mdb")
[code].....
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Apr 28, 2008
Using VB2005, Access 2003
I'm having a problem trying to read an access table with the following code:
HTML Code:
Dim strConn As String
strConn = "Provider=Microsoft.Jet.OLEDB.4.0;" & _
" Data Source=C:DBFILESService.mdb;" & _
[Code]....
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Nov 8, 2009
How do I add a row and then refill or refresh a DGV? The row is added/inserted successfully.What I can't work out is how to get the new row to show in a properly refreshed DVG.In one case I keep the old DVG view but the new row is missing.
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Sep 24, 2008
I'm importing a .csv file into my SQL Server (2005) using SSIS on a schedule, after its imported I would like to change the name of the file. The name of the imported file is always different as its coming from an external source.Is there anyway of changing the table name?
I've looked at using the stored procedure sp_rename, i.e.
Code:
USE TESTDATABASE1
GO
EXEC sp_rename 'dbo.SalesTerr5673A1889', 'Values';
GO
What I would like to use is a wildcard?
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Apr 1, 2009
Is it possible to have a quick and easy way of retrieving the last 10 records from a table?
Currently what I have been doing is retrieving all the records then one-by-one cylcing through each record until I have the last 10. To me this seems to have a lot of over-head reading each record. I just wondered if there was a quicker way of doing it.
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Apr 4, 2011
I have created a database in VB2008.NET using SQL 2008.
My problem is that while I am in the form where I see the the data, I want to retrieve backwards the related data from Owner and Car eg. the owners name and the car model.
Is there any way to do this in a single row?
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Mar 31, 2009
This may seem like a simple problem, but I am completely baffled. I am working on a timekeeping application using Visual Basic 2008 Express and Access 2000.
There are three tables being updated by three separate sub routines. Two work fine, one does not.
In trying to resolve the issue I test one field at a time. The test Access query and the code only reference the one field to change and two ID fields. The program runs but the field is not updated. The table has 42 fields to be updated when I get it working.
The Access query is:
--------------------
UPDATE tPPSummary SET W1MonHours = [@W1MonHours]
WHERE EmployeeID=[@EmployeeID] AND PPID=[@PPID];
[Code]....
When I pause the running program at the intRowsAffected it shows 1 record which is correct.
I am really out of options as tho where to go from here. There are no simple spelling errors in the parameters, there are no error messages and the sub runs to the end.
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Feb 10, 2011
I am trying to update one table with results from another table as such:
Table A (field, type) : Table B
ID (key) Integer : ID (key) Integer
ParentID Integer : IssueID Integer
Number String : ParentID Integer
: Number String
I need to construct and UPDATE statement that does:
Sets B.IssueID = A.ID When B.ParentID = A.ParentID AND B.Number = A.Number AND B.IssueID = 0
Here is what I have so far but it is producing an SQL syntax error (missing operator)
sqlStr = "UPDATE B SET IssueID = A.id FROM B JOIN A ON (B.ParentID = A.ParentID AND B.Number = A.Number) WHERE B.IssueID = 0
I have also tried
sqlStr = "UPDATE B SET IssueID = A.id FROM B, A WHERE (B.ParentID = A.ParentID AND B.Number = A.Number AND B.IssueID = 0)
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Mar 15, 2011
This is probably a simple process but I can't seem to accomplish it for the life of me. What I'm trying to do is transfer user inputted data from a Visual Basic text box into an Access database. The database consists of only one table with three fields: First Name, Last Name, and ID Number (auto-increment primary key). The VB code I have so far is this:
Public Class Form1
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
[code].....
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Mar 9, 2011
There are two combo boxes taking user's inputs to return a record in an Access Database satisfying the requirements. This procedure is controlled by a button. However, when it reads "da.Fill(dt, "NETP_ParaList")". It reports error saying that "ArgumentException was unhandled; Object is not an ADODB.RecordSet or an ADODB.Record. Parameter name: adodb" I have no idea what this talking about.
[Code]...
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