Streamlining A Dataset.writeXml File?
Feb 6, 2012
When i output my dataset to an xml file, 87 nested tables with 218 class object (system.type.object) columms i get 247,691 instances of output like this."msdata:InstanceType="LotNet.LForm+Pointer, Learing Programs, Version=1.3.0.9, Culture=neutral, PublicKeyToken=null" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">" In this case the decluration is more then twice the size of the Pointer. Is there any way to supress this kind of output the data is only used for internal consumption by other moduals.
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Feb 14, 2012
I am stack at work finishing my program.I have a piece of code to write an xml file.
Dim ds As New DataSet
Dim dt As DataTable = GetDtable()
ds.Tables.Add(dt)
[code]....
That work will write an XML file whatever I put in the datatable (or dataset). It is just a simple code and it works fine. The problem is it will replace the old file everytime the new file is created. I really don't want that to happen. I also want to include 2 variables (username, sessionID) also time of the file created in the file name. So file name will be Username_sessionID_time.xml rathen than a fixed name.
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Sep 21, 2011
In VB.NET when I use the WriteXML of DataSet, can I customize it? That is to say; I want to make a structure like this:
[Code]...
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May 15, 2009
What I am trying to do is to output a dataset into an xml document using Dataset.WriteXML(), but one of the things that I can't figure out how to do is to have what I believe are called inner nodes.What I mean by that is I have client data, but a client can belong to many companies, which I need to show in the xml as strings, so what I was thinking it should look like is...
<ClientData>
<Client>
<ClientName>[code].....
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Jun 24, 2010
I have some code that creates a dataset from a backend server. I then use the WriteXML method to output it to an XML file. This works fine. But some folks have requested that I sort the output one way or the other (yes, it is easy for them to do so, but they are end users and want the computer to do all their work.) I know I can use .select to extract the data to an array, but I would then have to write that array out to a .XML file. It would be easier (I think) to just sort the data before I output it to XML. I had thought there might be something like dataset.table(0).sortColumn = 2 or something like that, but apparently not.There is only one table and the code will know which columns may be used for sorting.
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Apr 16, 2012
I have a question about using writeXml. When I use this method, it writes to the specified xml file like this:
<safety><Incident>
<Name>Jason</Name>
<AGE>23</AGE>
</Incident>
<Incident>
<Name>Frank</Name>
<AGE>25</AGE>
</Incident></safety>
But, I would like to add these nodes to a parent node, i.e.:
<safety><SomeNode><Incident>
<Name>Jason</Name>
<AGE>23</AGE>
</Incident>
<Incident>
<Name>Frank</Name>
<AGE>25</AGE>
</Incident></someNode></safety>
I am creating the xml by first creating a dataset (connects to an SQL db and runs a query, filling the dataset) and using ds.WriteXML(myPath)
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Mar 12, 2009
I have an XML file that is being updated via ASP.NET. The user should be able to add new nodes to the XML file AT ANY LOCATION in the node tree.
The XML file is read into a DataSet using DataSet.ReadXml(filename).
A new row is added to the appropriate DataTable, using InsertAt(row, index).
I have confirmed using a DataGrid, and using a loop (For Each dRow in Table, Response.Write..) that the new Row was inserted into the table at the correct spot (in my example code, the 3rd position).
However, The WriteXml() method is writing the node to the END of the XML tree! I can't get it to see the tree with the node in the correct location.
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
Dim sXML_Lesson As String = "test.xml"
[Code]......
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Feb 18, 2011
I have to generate an XML file from several database tables. I could use the WriteXml method of the DataSet to do it, but the database tables are really huge and I can't add all those tables in the DataSet at the same time or it may cause a problem because of the big amount of memory used. Then I decided to use the DataTable's WriteXml method and save table after table, but the the generated file only stores the information of the last DataTable.WriteXml's call. How can I preserve the previous XML data when adding all that information?
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Jan 5, 2012
How to correctly insert image data from XML file to database table using sql server CE and openxml,XML file is written by vb.net DataSet.WriteXml method?image data is stored in database table is :
0x89504E47.my XML file Content after written by WriteXml method is :
<?xml version="1.0" standalone="yes"?>
<Data>
<Table>
<image>iVBORw0KGgoAAAANSUhEUgAAAcIAAAGuCAYAAAADLg..</image>
</Table>
</Data>
but after inserting with openrowset and openxml using stored procedure to another database table its value changes to this :0x2F0039006A002F00340041004100510.and is not the first value and raises an error in vb.net for opening image from database.
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Jun 3, 2005
I have a dataset which I wish to export to XML. The writeXML function works fine, but if a value in my dataset is a NULL, it doesn't export that element at all, for that row. I would have expected it to export at least an open and closed element.
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Aug 15, 2011
I have code to write xml file but unfortunately the database had field name with sapce eg. "form no" but when the xml file saves it converts to
"form_x0020_no" Pls tell me if there is any solution so that xml could be written with "form_no". and at this stage of application development i cannot chnage the variable names.
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Mar 2, 2009
I have developed a program that tracks expenses for business trips that uses just a local SQL CE database on the user's pc. I chose SQL CE because the install process was much quicker and easier than Express. I have distributed the solution and I am looking for a way to allow users to backup and restore the data. I though that the readXML and writeXML methods from the dataset sounded like a good method, but I can't get it to work. I have tried a couple methods which have ended in either foreign key errors or not being able to keep the same primary keys as when the data was exported using readXML.
The basic structure for the data is:SQL CE Database -> DataAdapter.Fill -> Dataset -> Displayed to user through binding sources and other means The problem is not exporting the dataset with .writeXML, but getting the data back into database. The one shot .updateAll from the main table adapter creates foreign key failures, so I have reverted to iterating through the dataset and sending one row at a time, but I still can't get it to work.
[code]...
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Dec 8, 2009
I have a form with a datgridveiw on it, but rather than connecting to a data source (SQL 2005 Express), I want to use a .uld file to do it. I can create the .udl file fine and the connection test works, but I havn't got a clue how to connect to my datagrid, or what the code is and when and where to create the connection and disconnect from it.
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Jan 13, 2009
I have the following code which output data in an XML format and updates a row in the dataset to say its been exported.[code]...
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Sep 11, 2009
I'm getting this error 'column' argument cannot be null. Parameter name: column at the bold character instruction. Also I would like to know how to relate two tables with two key columns in each table
I'm getting this error 'column' argument cannot be null. Parameter name: column at the bold character instruction. Also I would like to know how to relate two tables with two key columns in each table
[Code]...
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Aug 25, 2010
I want to create a web application,specifically an e-shop and I want to be able to export a xml file from a dataset with products.
Is this feasible with visual studio and vb.NET? If so
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Apr 3, 2007
How would you export a dataset to a csv file?
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Nov 24, 2009
I have a form which contains a datagridview which lists items.I have a button that will export all of my dataset to a text file:-
Dim str As New System.Text.StringBuilder()
For Each dr As DataRow In Me.ContactsDataSet.Contacts
For Each field As Object In dr.ItemArray
str.Append(field.ToString & ",")
[code]....
How can I export only the rows that I select (if I setup a checkbox column in my datagridview, I want be be able to only export the items that are checked)
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Jul 8, 2010
The way we create our DataSet right now is right click on project then choose dataset and create every table then each element that makes up the table. There are at least 10 tables with over 10 elements in each.
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Jan 23, 2011
I'm using the code below to filter a large xml file which causes it to run too slow, how do I convert the code below to filter my large xml file by using a dataset instead, I believe that would help speed up my search results.[code]
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Feb 17, 2012
I am creating XML files and load them back again. I use this following code to write xml to a folder. the code below will put date and time to the file name. and this code works fine.[code]...
Again, I want to load the last xml file back and put in a dataset. I normally write code like [url]...
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Sep 17, 2009
I am trying to populate a dataset from an XML file. Within the xml file are some € signs. However, when the data is read from the XML, the € sign is displayed as a ?. Has anyone seen this behaviour before, and if so do you know how to correct this? Below is a copy of the code i use to read the data from the xml file:
Public Function ReadExportFile(ByVal sFilePath As String) As Boolean
Try
msExportFile = sFilePath
[Code].....
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Jan 22, 2011
My problem is, I'm using a very large xml file (260MNB) and my search results takes too ong, I believe running a search against a dataset would be a lot quicker.
Dim SearchCriteria As String = "Link_ID <> -1"
If Not (TextBox7.Text = String.Empty) Then
If astrixState = 0 Then
[code].....
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Jul 4, 2010
However, now when I open it in design view and add a new tableadapter I now cannot reference the new objects from the code. Likewise if I delete one of the existing tables in the dataset, it still appears to be there from the code (ie in intellisense)Similarly, when I examine the .xsd file, the changes I've made i the designer appear, but the changes are NOT happening in the dataset.designer.vb file. It's as if the two files are somehow out of sync
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Mar 15, 2010
I have a comma delimited text file. I need to write this file to xml. I was thinking of first loading a dataset from the text document and then working from there. Is this a good way to go about it?Also how would I load the dataset from a comma delimited text file. The text is enclosed in quotation marks which I want to be removed
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Jan 31, 2010
I want to load an xls file to dataset, edit the data, and import them in mysql.My problem is that I can't load the file. It seems like it ignores the file completely.
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmd1.Click
Dim MyConn As OleDbConnection
Dim myPath As String = "C:TempManinLottery2009.xls"
[code]....
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Jul 29, 2011
How to write xml foreach datarow in dataset? I have dataset with 5 record in table, i want write to xml file with 5 xml file. in one xml file have one record.
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Oct 28, 2009
how to populate my Dataset into Crystal Reports and exporting to PDF File?
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Apr 27, 2009
I am creating a database application via visual studio, using VB.NET and with an access database. I've connected them and have been using them fine so far however I've had to make some changes to the original access database. I am unable to find an obvious way to update the current dataset object within the project from the new updated source file. My database has this new schema but the dataset has the old one so its causing conflicts. The only way I've found to do this in the past is to manually update the dataset with the changes I've made in the access file, so actually doing the same thing twice! Surely this isn't the only way? The changes I've recently made are massive so will take sometime to have to do it all again. If I delete the current datasource object and add it again, there are many errors left from the deletion. If I manually try to update the files, there's always some hidden ones I've missed. Ive found some sort of guide for updating the datasource via the dataset but what I want to do is the opposite!
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Apr 13, 2009
I have created a local database using the DB wizard in 2008 express.I have created a table called users and I can access the sample data that I have entered into it using a windows form.When I try to add a new record things come unstuck. The record shows in the windws form as being present and the record count increases to indicate this. But when i check the DB itself there is no sign of the record.I am using the tableadapter method as outlined by MSDN. So the question is what am i doing wronghere is the code from the form:
Public Class frmS4
Private Sub UsersBindingNavigatorSaveItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles UsersBindingNavigatorSaveItem.Click
[code].....
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