Better To Create One Dataset Named NorthDataSet And Have All Of Tables Defined In It?
Dec 8, 2009
I am a newbee at this but I have a general question about datasets.Most of the help I have read and the videos that I have watched when a dataset is created it is created for a given table.Take the northwinds database.When a dataset is created in vb2008 in the video it creates a dataset for the Customer table and a seperarte dataset for the Orders table and a serperate dataset for the OrderHdr/OrderDtl.Is it better to do it this way or is it better to create one dataset named NorthDataSet and have all of the tables defined in it?What are the pros and cons to doing it both ways.Is there something I can read to help me decide which way to go?I have a large project that is being changed from VB6 and ACCESS to VB2008 and Sql Server.The database has around 300 tables in it.
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Aug 4, 2011
I have an XML file that has a basic hierarchical structure about horse racing. It has a summary of the tracks, some data about each track, then a list of all the races at each track racing that day. So lets say there are 10 tracks, and for each track there are 8 races. This is a snapshot of the data....
HTML
-<Meetings xmlns="" Jurisdiction="VIC">
-<Summary MID="MR_20110801">
<VenueName>ECHUCA (VIC)</VenueName>
<Type>R</Type>
<Events>10</Events>
<Track>DEAD </Track>
[Code] ......
I have written the code to pull down the data into a data store, but I dont know the BEST way to put the data into a set of tables. My first thought was to traverse the nodes and add rows into tables but I figure there must be a native VB process that reads the xml and puts it into the the appropriate table. How to code up the process for getting the data into a set of tables that match the xml. So lets say I have a Summary table, I would like all the data about each track to go into that table. Then I would have a Races table and have the data for each race go into that. What I have done already is import the xml into Access to create the tables (which was a breeze!) and then link that data source to my project. So I have the tables already built.
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Dec 31, 2009
i have a few questions about seting up a form.when you creat a new for open the dataset drag and drop the tables to form it creates a top menu bar with pages plus sign and x and save.now when you run the app you need to press the plus sign to add data in the database..is there a way to make it that you dont need to press the plus sign?
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Jul 25, 2012
I am using VS2008 and SQLite. I have created a database and several tables and am attempting to populate the tables with data from arrays.
The following code (example) works fine but stops after it inserts 30 to 50 records. I am running the VB code in debug mode and when it stops, I press pause to see where it is. It stops on "SQLcommand.ExecuteNonQuery()" and when I press continue (F5) it will insert another 30 to 50 records.
I do not get an error message. Is this a timeout issue? How do I keep the loop running to the end of the array?
Following is example code.
Dim
SQLconnect As New SQLite.SQLiteConnection()
Dim SQLcommand As SQLiteCommand
CODE:.....................
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Jun 28, 2009
I created a SQL database using the migration tool.I am converting my access forms to VB.net (VS2008).I am wondering if I create a single dataset in studio to the database or do I create a dataset for each form (query)? I am trying to determine what the best solution is. Many of my forms have drop downs that are populated using queries from tables.
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Aug 26, 2009
I need to create a collection that should have named indexes. e.g.: IN typical collection such as ArrayList :
Dim al as ArrayList = New ArrayList() al.Add("10") al.Add("20")
to access first element i have to use "0" in al(0)...such I need to create a collection that has Named indexes instead of Numerical zero based indexes. such as: assume the collectio object is col1. to access the value element "RegoNo", i should use the collection object as col1("RegoNo") or similar technique Is this possible to do?
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Nov 4, 2011
How can I Declare a groop of sequentially named Labels?[code]...
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Aug 13, 2009
I am having very odd behaviour from my compiler when i run my program, i have two practically identical snippets of code that are doing pretty much the same thing: both are populating nodes on a treeview using information from the treenode above but when the program runs one of the snippets tells me at runtime that something i have defined is nothing. [code] section and title are columns in a dataset defined by dtName that exists, and the where bit is refering to a column where the entries match the value assigned to volume. which is 1 in the first iteration.
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May 26, 2011
I need to create 3 folders (named as In,Proc,Error) in C:Ram directory. First I need to check for folder existence in directory. If any of them not present need to create missing folder. If all missed need to create all 3. Could anyone suggest a simple looping code in VB.NET for this requirement .
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Dec 9, 2010
I've create a new VS 2008 Window Form Project using VB. I added an oleDbDataAdapter to the first and only form, set it to a table in my Access 2007 Database (there is only one table, PK field autonum of course and two Memo fields). The Database is in the Project's folder. A standard oleDb Connection object was created, as I expected, then I select the DataAdapter and choose 'Generate Dataset' which produces a standard DataSet called 'DataSet1.xsd'. Now when I build the project I get an error 'Error 1 Type 'FontTest.DataSet1' is not defined.' I do have a reference in my new Project to System.Data.So what the @#%$@ is going on? Why isn't the Dataset create by the DataAdapter being recongized? I can get into the DataSet Designer. The DataTable create is perfect, three columns defined correctly as I expected.
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May 11, 2010
I'm trying to make a very simple audio tag editor. The idea is that the user can select as many audio files as he likes from a ListView, and a PropertyGrid will then display their tags + their values.When multiple files are selected, I want the property grid to display the values of the tags that all files have in common, and display empty values for tags that the files do not have in common.As an example, look at the properties list in your Visual Studio IDE when you select multiple controls (of the same type for this matter). Select a few Button controls, for example, and notice that the properties whose values are the same (often things like Font, ForeColor, etc) are displayed. Also notice that the values for properties that are not the same (Text, Name, etc) are empty.
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Apr 11, 2012
I have one dataset with two tables and when some values from tables are changing I need somehow to change the values from table 2. Table one is conected to an SQL server. One table 1 receives a message from sql service broker it automatically reload all the information. I need in that moment to compare what I have new in table 1 and put it in table 2. I have made with <br />For i=1 to ..<br /> </p>
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Sep 13, 2010
I would like to copy tables at A specific position from a dataset and insert them into another dataset at a specific position.
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Feb 22, 2010
I am trying to develop a report that displays the result of a query that returns two tables. The first table is always a single row of values, the second should be a grid. I can get a report to display either independently, however it will not allow me put them both on the same report.
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Apr 11, 2011
I am having a data set in vb.net with two tables one table is filled by using oracle databse and another one from Sql 2005. How can we join these two tables in the dataset?
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Oct 12, 2011
I have need for a database in my latest app, i quickly realised it had been a long time since i last used a database and am in fact very very rusty on the subject. So i decided to create a simple DataSet using the designer, i created 2 tables as follows
Table 1 is Named Map and contains a 2 dimensional array each cell containing an array of object id's of anything in that cell, and a level ID.
Table 2 contains data about these objects ie size weight and a z-order, again referenced by an object id (matching Table1)
This i did with no issues, when it came however to actually populating these tables i drew a blank. Do i have to locate the database file and edit with notepad? I presume not. Maybe i have to use an external app like sqlmanager? I seem to recall from my past that i added table rows from within the designer but i cannot find this in 2010 express
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Dec 25, 2009
I have been answering question about updating Table or DataBase Using DGV. Most the people still having problem about it. Being honest with all of you, I don't know why?
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Apr 13, 2012
I am working on a database application. I had used Dataset to link my VB programme to a database and selected specific tables. However, I created more tables in the database and I wanted to add the new tables to the dataset. I could not find a simple way to do this, so I deleted the existing dataset and created a new one. This move has broken my VB codes. I can no longer run them as errors are shooting up. In fact, I connot view the forms in my programme anymore. I have a backup of the codes to rerun, but then I need to add new tables to the dataset.
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Mar 17, 2010
I have some problem with working with tables which were created on previous form. Say we have a form Customers in which Customers are displayed in datagridview.Now to create or add ne customer to this customer table on sql server, another form is opened.In this form user enters all data like customer name, phone number etc. when changes are made to the sql server using a stored procedure this form is closed now I want to show this newly added customer in the datagridview of the previous form.Right now what I am doing is creating data set and command et. and again fetching data for all customers from sql server.
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Nov 3, 2010
I build xml in memory from the file, separate that into nodes for binding to different grids, works fine except the dataset is missing two tables and I can't find out why, the code below uses a stream but I've tried a ton of stuff by now, and, just using ds.ReadXml(path) doesn't work to get the proper nodes and drops all but the first major node: vs2008/vb.net project.
I believe what's going on is that the nodes have attributes ... none of the nodes that do come through have them, the "author" and "entrydate" nodes are being dropped from the string:
If (My.Computer.FileSystem.FileExists(pPath)) Then
xmlDom.xmlArchMaster(pPath, xml)
_default.ActiveSiteID = xmlDom.siteheaderNode.Attributes("id").Value
[Code]....
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Apr 14, 2009
I have a VB.Net dataset that contains data from multiple tables. how to query data out of the dataset. I want to run SQL-like queries on a dataset to extract data that fits a certain "where" statement.
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May 31, 2010
I pass it a valid dataset that has the department name and the Department id as a number..20, 40, 30..... I want to get the department number.. I pass it HR(which is in the ds.table) but I am getting an error on the rows.find() "Input string was not in a correct format" it is a string.. what else could i be doing wrong here...
Public Function GetDeptID(ByRef ds As DataSet, ByVal strDepartment As String) As Integer
'Dim dr As DataRow
' Check to see if date is already in the table
[code].....
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Jun 21, 2010
The situation: I have a small application where i store customers and orders.. In my database i have a tabel called Customers and a tabel called Orders. These 2 dabases are joined on Customer ID - every Order record contain a row with the customer Id.
[Code]...
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Oct 21, 2011
I have a Dataset with 2 different tables. What I have to do is to display those tables in a DataGridView.What I have done with a reference is given below.
[Code]...
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Oct 5, 2009
I have an office project which shoudl basically do the following:
1) take different TEXT files of fixed-length fields and put them in separate tables.
2) use the data from the different tables and compile them to a master table in a mdb.
3) display data in compiled mdb in datagrid 4) allow editing in datagrid 5) save the data in datagrid into the mdb 6) save the data in datagrid in a csv file i did some googling and came up with the following code:
[Code]...
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Mar 1, 2011
First off I'm a newbie to VS but hopefully my question isn't terribly clueless. I've been searching endlessly for an answer but I don't find much relating to VS 2010 I'm running VS2010 Ultimate and I'm creating a Windows Form app in VB .net 4. I'm connecting to SQL Server 2005.
[Code]....
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Oct 25, 2011
In my VB.Net desktop application, I have several places where I am accessing a table, both for reading and for updating. For example:
Dim tempCount As Integer = Glbl.GlobalDataSet.Tables("Profiles").Rows.Count
The above does not work. However, the following does:
Dim tempCount As Integer = Glbl.GlobalDataSet.Tables(4).Rows.Count
I am pretty sure it was working in th past (I have recently switched to VS 2010 - could this have anything to do with it?) but it is not working now.
How can I make the first statement work, so can access tables by table name instead of by index?
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Oct 9, 2009
does VBasic allow a MS Access Database DataSet create a Stored Procedure or will it only allow SQL Database DataSet create SP...
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Aug 6, 2010
How to bound this dataset to datagridview?
[Code]...
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Dec 30, 2009
I created a typed dataset and my database guys are constantly updating and adding columns to tables.. is there a way to do a comparison
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