VS 2010 DataSet Append Write?
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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Feb 12, 2011
I'm trying to use XML more often in my apps, but somhow I just can't get it. Examples on the "net" are somehow unclear to me.
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May 31, 2011
Dim filesave As System.IO.StreamWriter[code]...
The above code works fine, but the problem is it overwrites the Quiz0.txt file's text. I want it to append the (";" & TbxOutput.Text & ";" & answrstrng) thing to what is already written in the Quiz0.txt file so that I can use the button (which runs this code) multiple times to add to the Quiz0.txt file.
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Apr 12, 2007
i'm writing an application where error messages are written into a text file.
text file is created using win32API createfile() function.
after that everytime an error occurs the message is written into the text file with writefile() API.
but whenever a new message is written the old text in the file is getting overwritten.
i want to append the new message at the end of the text already in the file.
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Apr 16, 2012
I'm a newbie writing my first app. I need help with the following: I need to retrieve the logged in user which = GID, I then need to append it to a URL which will start our Help Desk chat client. I can retrieve the GID easy enough but can't figure out how to append it and pass it with the URL. I found a post which instructed to declare the url as a string also and concatenate it. The UserName would follow the ":" at the end of the Url.
[Code]...
We use javascript to do this from the HelpDesk site, but I need to adapt it to work from my app.
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Dec 11, 2009
I have written a program that is 99% complete now, but it is one thing left.I need the program to append My.Settings.MyString to a txt file.I have tested with this y.Computer.FileSystem.WriteAllText("C:mytxt", my.settings.mystring,ue)But when it writes the string to the txt it writes it wrong!If i check whats in mystring by typing MsgBox(My.Settings.MyString) it shows the string perfectly in order (it's a multirow string), example:
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Jan 29, 2012
The three forms in my project have the ability to print in PrintDocument1.Print event. Each print-document consists of only one page in landscape shape and everything works fine. But it seems a bit clumsy to print three times with three buttons. I know, I can use the PerformClick event, but I wonder if there is a simple way to append all three documents into one by clilking only one button in my last form?
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Aug 28, 2011
I am trying to append a new line to a text file. Sometimes it posts to a new line (like I want it to) and sometimes it appends to the current line, consequently screwing up my read. I even put VbNewLine in the code.
Here is the snippet:
Dim outputline2 As String
outputline2 = equip & "," & value
Dim myfile2 = File.AppendText("equiped.txt")
myfile2.WriteLine(outputline2, vbNewLine)
myfile2.Close()
[URL]
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Apr 23, 2012
Below is the code which I am using to append data to a text file.
Dim FILE_NAME As String = "C:cebsample.txt"
Dim objWriter As New System.IO.StreamWriter(FILE_NAME, True)
Dim record As String
Dim amount As Integer
Dim amt As Decimal
[Code] ....
Now I would like to save that updated file with another name.
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Mar 15, 2011
I am coding a simple calculator and I need the textbox to show the previous entries when I enter them. I hear the best way to do this is by Append Text? For example I click 3 Then + The textbox will show "3+" etcetera.
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Aug 25, 2011
How to add , append , rename and remove project resources during run time? How to get a list of all resources during run time? How to use project resources? (for ex. i added textfiles and images how can i open them?)
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Jul 13, 2010
My Visual Basic 2008 can insert a new row to a dataset, but the dataset does not insert new rows into the actual Access 2007 database. The database remains unchanged and there are no error messages. How can the dataset write the new row to the database? [code]
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Jul 27, 2011
I loaded a dataset (just one table) from the database. Then I modified f.e. the rows from 5 to the end and add 4 new rows. Now, I would like to write back the dataset into the database.
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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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Apr 18, 2012
How do you reinstall and write over the previous dataset from a click once app? I assume that in a purchased version there are some added features with deployment and install. I am needing to delete the previous dataset when I uninstall. Currently,I am getting the first dataset AFTER I reinstall which leaves me with the mistakes and reason for reinstall not being fixed.
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Feb 2, 2010
I found several examples on how to write to dataset, but most of them involve a ds.fill(..) from a data connection and I need a simpler solution. Basically I want to create an xml file from the values entered in a few textbox. I tried different methods but can't make it work. What is the best way to accomplish this? One method I used was to fill the textboxes from an xml, but now how do I write it back to the xml once the user has changed the data in the textbox?
[Code]....
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Sep 19, 2011
I am attempting to write the entire contents of an ADO.NET DataSet to an Excel 2007 spreadsheet and, while having partial success, I am unable to dump the contents of the DataSet into the .xlsx file. "Partial success" meaning that I can generate the spreadsheet(s) ok, but cannot get the DataAdapter.Update to work.
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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
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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
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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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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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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.
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