Why Cant Dataset Not Be Replaced By Datatable Reading And Writing Xml
Sep 27, 2011Dim ds As New DataSet
Dim xmlfile As XDocument = XDocument.Load("devices.xml")
Dim reader As XmlReader = xmlfile.CreateReader
[code].....
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Writing To Specific Cell Located In DataTable From DataSet?
Aug 14, 2011I'm trying to write to a specific cell located in the datatable, which is from dataset. I know that it would be datagridview1.rows(xx).columns(xx).value=(""). But how to do it in a datatable
Public Class Form1
Dim ds As New DataSet1
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim TestValue As String = "test value"
[Code] .....
The following code above does write to column 3 row 1, but if you say .rows(1), i get "there is no row at position 1". So, in summary if I have 7 columns, and I created a second row I want to write to column 3 and the 2nd row.
Improve The Performance Of Reading Data From Excel And Writing To Datatable?
May 21, 2011I want to import data from excel and move that to Datatable in VB.NET 2008. I wrote and working but its taking too long time.. for 1500 records its taking 4.40 min.
[Code]...
DataSet Editor - Allows The User To Edit A DataTable In A Strongly-typed DataSet
Mar 15, 2010When the user clicks an "Edit" button on my form, I want a box to come up which allows the user to edit a DataTable in a strongly-typed DataSet. What's the best way to do this?
View 2 RepliesIDE :: Dataset Code Behind Datatable.ColumnChanging Event Firing / But Dataset.HasChanges Property Not True
Jan 28, 2010I have code running in the Datatable.ColumnChanging event in my dataset. This dataset underlies a form and conventional drag/drop controls are in place for data entry.when the event triggers and runs, I am running code in the form that checks the dataset.HasChanges property. It is showing False. But this is immediately after the ColumnChanging event has been triggered.Okay, I see by others posts and MSDN that .HasChanges will only be true after moving off the row with the changed column. I have also noted lots of discussion about the advanced binding property of DataSourceUpdate Mode, but that does not address this issue.I guess I can do this by checking the state of the row for the binding source. Just seems odd that the event behind the dataset can be triggered and that does not change the dataset.HasChanges property.
View 3 RepliesAsp.net - Copy Data From Datatable To Dataset.datatable?
Oct 31, 2010how to copy data from datatable to table in dataset i ry this but its readonly property
ds.datatable1=newdt.copy
Writing XML From Dataset?
Jan 16, 2011why this does not output any data to the xml file?
'this displays all records
Me.SQLString = New OleDbCommand("SELECT * FROM FlightDetails", DBConnection) ' WHERE FlightDetails.ReportNumber=BeforePushback.ReportNumber", DBConnection)
'establish data adapter/data table
[code]....
There is no exception or error thrown, the debugger just skips over it.The FlightDetailsTable contains data as it is bound to text boxes on my form. I just don't know why the data is not written as xml to the file.The file created contains this line '<?xml version="1.0" standalone="yes"?>' and that is all.
Reading And Writing INI Files
Mar 12, 2011I'm creating a simple forms application where users can enter their details and save the information to a .ini file because I needed this for a simple game profile. I've tried to make it write "Name =" + txtname.Text but it won't work anymore. And as well as that, I don't think It will load the text back from the ini file.
Here's the code I used;
Public Class Form1
Dim hFile As Long
Dim sFilename As String
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
[Code] .....
Form designer: [URL]
Form1.resk: [URL]
Form1.vb: [URL]
Reading And Writing To 64 Bit Registry?
Sep 20, 2010I need to read a value (and possibly adjust the value) in HKLMSoftwareMicrosoftWindowsCurrentVersionUninstall key on both 32 and 64 bit systems.I've tried accessing 'stuff' by compiling my widget as both a 32 and 64 bit app, but nothing is working. Then I came across some information indicating that this could be done from a 32 bit applicaiton using KEY_WOW64_64KEY [URL] somehow, but I can't figure it out.
1) Check the existing value of HKLMSoftwareMicrosoftWindowsCurrentVersionUninstall{ProductGUID}DisplayVersion handling both architectures.
2) If the value <> "" And <> Our Current Version Then
3) Write the Current Version to the value mentioned in step 1.
I wouldn't think this is that difficult as I've worked with registry before, but the 64 bit stuff is throwing me for a loop.It would be nice if I could compile my app to target AnyCPU then detect where its running on 32 or 64 bit. The app could then look and update in the appropriate location.I currently am set to use .NET 2.0, but could go to 4.0 if there is something in there that makes the above tasks easier.
Reading And Writing To A Txt File
Jun 27, 2011I have a tab spaced txt file that looks somthing like this;
[Code]...
I'd like to be able to read in the file and have a pop up message ask somthing like this; "Is cash1 for comp1 correct?" If yes ask about the 2nd line and if not ask what the real cash total is and then over write that to the file, then ask about the 2nd line.
Reading And Writing To Csv File?
Dec 31, 2010i am working on a Yahtzee projeect for college and am struggling with reading and writing to a csv file the code i have to read the file works but only gets the first column and displays it on a line not as a list.
Private Sub HighScoreFrm_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
[Code]....
the other criteria i have to work towards and wondering if anyone can help is to limit the amount of records to 10 so need to check what the lowest score is and if the current score is higher over write it,
Reading And Writing To Settings.cfg?
Jan 15, 2009i want my form to read a textfile and make it like line 1 will put in textbox1.text and line 2 will put it in like textbox2.text and like when the app closes it writes textbox1.text to line 1 and textbox2.text to line 2 in the .cfg file
i found acouple codes, but i havent found one that worked for what i wanted to do
Reading And Writing To/from A Database?
Jun 16, 2010I have a table in a database with 3 columns: OfferName, ExperienceAward, and GoldAward
I populate a combobox with the various offer names with the code below:
Dim con As OleDbConnection = New OleDbConnection( _
"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:UsersDouglasDocumentsVisual Studio 2008ProjectsGameBoxRPGGameBoxRPGContacts.accdb;Persist Security Info=False")
Dim cmd As OleDbCommand = New _
[Code]....
Reading/Writing To Config.app?
Apr 13, 2011The code below has a green line below the text after Return. VB10 states that the context is obsolete but I cannot find a new method to get rid of it
Imports System.Configuration
Public Class Form1
Public Shared Function ReadSetting(key As String) As String
[code]......
Resources Reading And Writing?
Jul 23, 2009how to write and read from and to resource file, pressuming they are text files. I tried using the standard file streams but that does not work.
View 6 RepliesVS 2008 Writing To A .ini Then Reading It?
Mar 22, 2010Ive searched for the pass hour on how to do this. Everything ive found is for vb6 and it wont work with 08 for some reason. Here is what i am doing, and the way i want to do it.I have a login form that has a checkbox remember me. Inside the if statement (If chkRemember.Checked = true) I want the code to write the username and password in a config.ini file in this format;
[LoginInfo]
Callsign=dsfsdf
Password=dsfdsf
[GeneralInfo]
Can someone provide me with a code i can use for this? I also want to be able to read that data to.
Writing And Reading File
Aug 7, 2009I have created a small game for my son and after each game it tells him his score.all I want is to write the highscore to a file and have it open each time he begins a game..so he can see what his last score was. I dabbled with all this Io.file stuff and I just can not seem to get it to write to the file..also how do I work with app path in this case? I mean when the game is done and installed the current path of the save text would change.
View 6 RepliesWriting To And Reading From A Database
Aug 24, 2009Im trying to get my program to fill out textboxes with information it reads from a database, and then save the changes to the database. Does anybody know any good tutorials of this which i could look into?
View 6 RepliesWriting/Reading .dat Files?
Dec 28, 2009seeing as '.dat' files contain only what you want them to and there is no preset encryption for them etc could I write data to one by using this simple process:
1) Change file extension to '.txt'
2) Decrypt
3) Write
4) Encrypt
5) Change file extension to '.dat'
and pretty much the same for reading it. or am I thinking to simply?
I thought of the above way as i know how to write to text files already, but is this the best way to do it? or is there a better way?
EDIT: Nevermind you just write to it like a text file and encrypt/decrypt it. request lock/delete from mod.
Writing To Database/Datatable In Simple Project?
Sep 13, 2010I have created a simple project where I have two forms, one a data entry form where a client name, address, city, state and zip are entered into textboxes. Then, the user clicks a button to add all this data to the datatable via a newrow. The second form includes a datagridview to show the datatable. However, I cannot get the code below to work to update the datatable. I have a button to click to check to see if the data is entered and it returns an error that no row exists.
View 2 RepliesWriting Data From Dataset To Database?
May 10, 2011I am trying to write data back to my database in my project, but it keeps disappering when I make any changes to code. I can build the project, add data, close the project and build it again and the data is still there. But as soon as I make any changes to anything, on the next build, all of the data is gone.
The table will not be bound to any controls in the final project, but for testing purposes I have a datagrid control that it is bound to. My code started as follows:
[Code]...
XML DataSet - Writing To Selected Element?
Apr 26, 2011Public Class Form1
Dim ds As New DataSet
Dim xd As XDocument
Dim Qual1, Qual2 As String
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
[Code] .....
How do I make it so when I click the button it saves to the selected element that is selected in cb
My question is my code for populating employee information based on the name selected in the combobox cb works, However I need to be able to write QUAL1 and QUAL2 to the employees whose name is in the combo box.
Better Ways For Reading And Writing To .txt Files?
Jun 29, 2006I am trying to create a bunch of records, there will be a limited number of "Codes", about 50. Each "Code" is associated with a name from a textbox, I was trying to have it save each one when you click a button, to a .txt file.So, from the start the record will be blank, the person will go through the form, choose a number from a numerical up and down box, pick a name associated with it (both of these are mandatory and not implied). When they click the button, it will save the contents I talked about into a .txt file, say the number is #2, and the name is "Bob", the next time they try to change that value for #2, it will overwrite "Bob".
View 6 RepliesCharacters Not Reading/writing Properly?
Jul 5, 2011I have a code to rewrite an ini file, but characters such as 'ñ' will get changed to '?'. This way my whole ini file will get ****ed up, I have no idea to fix this and this is a serious issue for my application.You can find my whole source file here:
View 4 RepliesEasy Way Of Reading And Writing To / From Register
Apr 20, 2009I have been using what I think is a simplistic and easy way of reading and writing to/from the registry but whenever I look at code I keep seeing links to DLL's and constant decorations and lines and lines of code.[code]
View 2 RepliesFile Reading And Writing Methods?
Mar 15, 2011I'm trying to write a program that will read a text file, and sort of filter out some things into some new files for myself. I have a website that I like to put information such as Artists, and songs for music. My website writes the Artist, and Song I input to one file on a new line in the format of (Artist - Song). The problem is it's gotten massive! I want to start organizing my artists, and songs anyway I come up with but I don't even know where to begin. To narrow it down I want to go into the file grab the artists name before the (-) and then write it to one file. After that I want to write everything after the (-) which is the songs to a different file. What file reading, and writing method should I use? As you might be able to tell I'm quite the noob.
View 7 RepliesFile Writing And Reading Into List Box?
Apr 4, 2009I have Strings writen to a file.
But i then want VB to read the file, and input ALL the strings in that file into a ListBox.
Getting A Code For Reading And Writing To Files?
Jul 18, 2012I have been given the task of basically reading and writing to and from files. Below is the code from one sub:
If btnSaveRecipe.Enabled = True Then
FileName = "C:UsersLeylaDocumentsRecipe TaskRecipe.txt"
FileWriter = New IO.StreamWriter(FileName)
[code]....
I can't work out what i've done wrong, but when I open the file itself in the folder, it is empty.
LINQ: Writing And Reading XML Settings?
Mar 8, 2012i am having trouble reading my XML settings. I Create new entries like this
Private Sub Create()
Dim doc As New XDocument
If File.Exists("Settings.xml") Then
doc = XDocument.Load("Settings.xml")
[code]....
The XML file will have multiple <Network> Entrys. I cant figure out how to loop the file and get every <Server> entry. But then if i opened a form and gave the variable one of the server entries how could i get that <Network> based on the server entries child parameters.
Reading And Writing A Text File?
Nov 23, 2011how to read and write a text file in vb.net
View 7 Replies