VS 2010 Way To Get Xml Into A Dataset?
Nov 22, 2009
just wondering if what i've been doing for the last few months is the best method to get data from xml and onto datatables within a dataset or if there is a simpler way i have completely overlooked. Rather than go into the code i will explain the process step by step.1/ setup a dataset and add tables with columns ready for data2/ setup various classes so i can construct a list (or array) of a specific type3/ get the xml into an XElement type.4/ use LINQ to obtain a query from the xml5/ use this query to create lines of the t
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Jan 17, 2011
I am using Access 2010 and VB in VS2010.I have created a DB and have several tables. 1 table in particular called Employers, has the normal AutoNumber Primary key. Everything in Access runs fine. I used Access to develop a basic model application of the full version I am developing in VS.My VB front end contains a dataset linked to the employers table. I have dragged onto my form the "detail" view of this DataSet, not the DataGridView. The usual controls are in place such as the EmployerBindingSource, EmployerTableAdapter, TableAdapterManager and a EmployerBindingSourceBindingNavigator.On my VB form Scrolling through the record set is fine and all works well.My problem is after I click the "Add" record button on the EmployerBindingSourceBindingNavigator. The form fields go blank as expected awaiting user input. However, the field that is bound to the employer_id field (the Employer table's primary key) shows a value of -1.The insert command works no problem, and having looked at the database the table contains the new record with a correctly incremented PK
[Code]...
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Apr 20, 2010
get data from xml and onto datatables within a dataset or if there is a simpler way i have completely overlooked.
1/ setup a dataset and add tables with columns ready for data
2/ setup various classes so i can construct a list (or array) of a specific type
3/ get the xml into an XElement type.
[code]....
Now i am wondering if i can say for the type in step 2/ use DataRow as the type thus missing out step 5/ ? is this possible? what other ways are there to get xml into a DataSet? One other method that occurs to me is to load the xml directly into the datatable (this is possible?) but i am not sure what the xml needs to look like for that to work. My xml is simple it contains only values and no parameters if that helps...
I require my final dgv to be sortable by column clicks etc so needs to comply to various interfaces, any pointers on this (perhaps i can avoid using a dataset and populate direct from my DataObjects so i only need steps 2, 3, 4, 5 and 7?)
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Jun 10, 2010
i am trying to read csv to dataset and display the results in grid which it working fine. But i want to use the values. I know its a dumb question but gotta start somewhere
[code..]
I can see these in dataset just fine but in just one column. So i know i have to use split with "," but i cant seems to find the right syntax... here's the code below..
[code....]
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Jun 27, 2011
I am working on a program that uses an SQL database which in terms has a dataset .xsd which im using. I need to be able to update my dataset so it can reflect any changes made during run time. I am using the internal data binding that vb uses so I am not doing anything manually.
I fill a table adapter with information from the dataset and table with this snippet of code:
Me.biweeklyTableAdapter.Fill(Me.DDSPayRollDataSet.biweekly, biwk.valpay)
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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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May 26, 2011
I am having a problem adding a row to a dataset.HTML
Private Sub BtnAddNew_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnAddNew.Click
nrow = ds.Tables("addressbook").NewRow()
nrow.Item(1) = txtFirstName.Text
nrow.Item(2) = txtSurName.Text
[Code]...
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Dec 21, 2011
i have a strongly typed DataSet that haves these two tables:
AUTHORS
ID
Name
and
[code]....
Somewhere my system haves a function that returns a DataSet with the books of a certain subject and all the Authors that wrote such books.I need to show the book's attributes in some textboxes inside a Form. I use a BindingSource to display the ISBN, Name and Subject of the books in a textbox, yet I don't know how to display the author name of the book I am currently viewing in a TextBox, taking into account I already fetched the Author into the DataSet.
Its pretty much the Child/Parent display problem somewhere discussed in the codebank, but kinda backwards, the thing is that I;m navigating through the CHILD records here, not the parent, yet i have all the data needed in my Dataset.
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Aug 11, 2010
I have to change an application I was made, but I have a big trouble.In this application, I use a SqlServerCE file, as database.But now, I need access the database from another PC.
I will made this:
- Create a XML file, with the location of my .SDF file
- The connection string, form making SQL commands is easy adjustable.
- The problem is: And how can I change the dataset automatically created form the VB? use it many times, in many forms, and in the application load, I have to read the XML file, and update this dataset.
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Oct 12, 2011
VS 2010 Saving Dataset
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Dec 13, 2011
I am in a bit of a sticky situation. I am currently writing a program where users are going to have to search for a specific skill in order for a calculation to take place.I have to hard-code around 500 skills but they also have to be able to search for the skill via a text box.I am stuck on whether or not to use an XML file to hold all this data or use a DataSet.I have no experience with either, but the XML file seems more appealing because I wouldn't then have to re-release the program for an update on skills, only the XML file would need to be replaced.
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Sep 16, 2011
I'm using Visual Studio 2010 and I'm working on a windows application form. I'm struggling with our database. I can connect and retrieve Data in the Grid View. But I dont want to display the records I want to put a specific on ina specific row column in a variable,in short I want to work with it.My DataSet is called ProductionDataSet. The Table is called Employee and has four column called Employee, First_Name, Last_Name and Status.How to I now store lets say the entry in colum 4 and row 5 in the variable x?
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Jan 22, 2011
I'm having a bit of trouble showing the data from my access DB within my application. I am using a DataGridView to display the data. Whenever I click the button I have made to display the data.the table remains blank. I am trying to avoid using the designers in VS2010 as this is for A-level coursework and i wont get any marks.
[Code]...
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Oct 2, 2010
I am filling my dataset like this.
Public Function FetchData() As DataSet
Dim oConn As System.Data.OleDb.OleDbConnection
Dim oComm As System.Data.OleDb.OleDbCommand
[Code].....
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Oct 26, 2010
When my project starts, it first checks for the existence of certain rows in the database. During testing, I often delete these rows, as they get kind of messed up over time due to all the odd tests I am running. For that reason, if when the project starts, if the records are not there, the program first creates them.The records are pretty static over the lifetime of the project, so they are held in a dataset for ready access from various parts of the program. Therefore, if the records are not in the database, the records are added to the dataset, and the dataset is updated back to the database. This works without any issues.However, one of the easiest actions to take will cause one of these records to change two fields, and a new record will be added. Those are all the changes that are caused by this action. Those changes are then updated to the database...or so I hoped, but when I try that I get an exception stating:[code]I have looked at the datatable that is being updated, and there are, as I expect, two records being changed. One of the records is the new one that is being added, while the second record is the record that was changed. I have noted that the change is, in fact, different from what is in the database, so this really IS an update.
However, I also noted that if I then stop the program and start it again, all is well. This indicated to me that it was actually the routine that created the records that was causing the trouble. Therefore, to test this out, I tried a totally horrible solution. I altered the method that writes to the new records to the database so that after it wrote each record, it would clear the whole dataset and fill it all again. That's obviously a terrible thing to do, but it works. If I write each record, throw out the dataset and re-create it, then I don't get any exceptions when I later try to modify it.This makes no sense to me. What am I doing in that first method that could be putting the Dataset into a state where it fails on any further modifications? I should add that the code that actually pushes the changes to the dataset down to the DB is the same for both methods. In fact, the database is updated in an UpdateDB method that is called from that first method (which creates the initial records if they are missing), as well as being called by the other methods that alter the dataset. I have also confirmed that ANY alterations I want, whether they add, remove, or just alter records, works fine. It is only that one method that creates the initial records that is causing me trouble. Moreover, it is not the actual update of the DB that is doing it, since that same method works fine ever after. Further testing has showed that the issue is row by row. As each initial row is added, it can't be modified by any other code until the dataset has been re-read from the DB. url...
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Aug 7, 2011
I' newbie and i dont understand why this won't work TableName is String "Tab"DataGridMain is name of DataGridView.[code]
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Apr 26, 2011
I added queries to my dataset via the designer. Is there a way to use variables in those queries?
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Mar 4, 2011
I am using a dataset control on a form to store and read data from XML files. So far I use the following to write info.
VB
Dim drow As Data.DataRow = DataSet1.Tables("item").NewRow
drow("path") = strFilePath
drow("id") = strCreationDate
[Code]..
The problem is I need to APPEND data to the same file. What I do now results in the same file being overwritten. I am dealing with large amounts of data, so I would love a way to append to the file without the need to re-read it with each save.code lines 1-4 are in a loop so that at one time, they add a few hundred rows to the DataSet. After that loop is when the save takes place. However, I want to run that loop again and again every so often to update that same file.
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Mar 14, 2011
Below mentioned codes I used in VB 0.6, now I want to use the same codes in VB.NET Windows Form (VS2010)
With EMPrecordset
EMPrecordset.MoveFirst
Total = EMPrecordset.Fields("OT")
[code].....
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Feb 8, 2012
I want to enter records into an sql database but before i do so i would like to load data from the sql database to a dataset and test if the record i want to enter is already in the database. if yes it does not add the record - preventing duplicated records...for examplename | grade | subjectleo | 7A | mathsi knw how to load the database to a dataset but cant rap my mind around the test to see if the record is already there..
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Feb 2, 2012
I know this is simple, but for some reason.. Im just simply trying to take my whole dataset and put it into my premade mysql tables.
[Code]...
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Jun 17, 2011
I'm making my own ID field (highest number + 1) and using it when I insert a row into my tableadapter, and I've tried two ways...
Ordering my dataset by ID descending and picking the first row does nothing for me.
I've tried building a datatable and ordering it descending and choosing the first row. This works great until you get to 10... Then it counts 1, 10, 2, 3, 4...
How can I make a textbox, label, etc be the next ascending number in my column Highest Number + 1?
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Aug 29, 2010
I have data in a DataSet and want to extract 3 fields from each row in the DataSet.
Field1 = String
Field2 = Date
Field3 = Time
I then want to add all the Field1 strings to a combo list box, sorted by the dates and times in Field2 and Field3.
Is there an easy way to get the data from the DataSet in a Sorted order?
i.e. Equivalant to saying "SELECT [Field1] From [Table] ORDER BY [Field2], [Field3]" in SQL.
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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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Aug 1, 2011
My application will start (dataset filtered by username/date) and if it's the first time the user has used it today it will be a blank entry form because there is no record for today created. The user can just type data into the blank form and close it. On the form closing event I want it to run a tableadapter.insert(username, date, x,x,x).
If it starts a second time it will load showing today's entry because today's date was inserted previously when they closed the form. So this time when they close the form I want the form closing event to just run a tableadapter.updateall(dataset) command. I need some help with my form closing event...
[Code]....
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Apr 4, 2012
I am currently developing an application that is linked to a MS SQL Server 2008 Database. So now I realised that I needed to make a few minor changes to the database (add new columns to some tables, change the data type of a few columsn in some tables). After making the changes, I realised that these changes have not been updated in my VB application's dataset. I then tried to "refresh" the dataset, but it still is not updating the dataset. What do I need to do to update the dataset to reflect the changes in the database?
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Jan 13, 2012
I inherited a program that retrieves 3 datasets from our vendors' web services, converts it to a table and then merges the 3 tables before exporting into xml from the resulting combined table. The problem I am having is that when web services returns an empty dataset the program crashes in the attempt to create a table from the empty dataset.How do I modify this code to either create an empty table or recognize the empty dataset and skip around that particular table creation, merge and removal? There is always data in at least one of the datasets.
foreach (Branch branch in branches)
{
Console.WriteLine("Opening connection...");
Vendor.ws_ordersSoapClient VendorClient = new VendorInterface.Vendor.ws_ordersSoapClient();
[code]....
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May 1, 2012
i have a Userform that I created in MS Word that automates almost half my job. I'm just looking to re-create this form in VB.Net so that I can keep up with the trends.What I did previously was load a listbox based on the contents of a data table in another word document. I've searched for other methods of creating a datasource in VB 2010 Express but I'm unsure how to load the contents of a dataset or datatable as opposed to a table from MS Word. Ideally, I'd like to abandon using Word tables and create a dataset in VB and load a listbox based on that. I do not have a copy of MS Access and I'm unfamiliar with MySql, which I'm guessing would are the easiest methods of loading a dataset. I also thought that maybe if I could create a seperate form (let's just call it form1) specifically for entering new data and saving the form as data is added, then linking the datasource from that form to a second form (form2) that has the listbox that will populate with the contents from the data in form1.
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Nov 10, 2010
I am creating a custom design for printing (RDLC)Is this possible to populate my rdlc from pre populated Dataset?I am populating my dataset like this
Private Sub populateExam()
Dim daClients As New SqlDataAdapter
Dim dsClients As New DataSet
[code]....
My Dataset hold only 1 record from my database.I need to pass that record into my cutomize page for printing.This is my layout. the red rectangle is the place for the values.
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Aug 19, 2010
In my application, I have a dataset, automatically created by the VB, called "Batabase1Dataset".This dataset, will "connect" to the file Database1. sdf in the directory of my solution..Is some moment of the program, I need the dataset will read the data from the file "c;estdatabase1.sdf", instead the file: "....MyAppdatabase1.sdf"..How can I change the path of the dataset reading?
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