C# - Write XML File Foreach Datarows In Dataset?
Jul 29, 2011How 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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Write Textbox.text To Dataset Then To Xml File
Feb 2, 2010I 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?
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How Dataset Write New Row To Database?
Jul 13, 2010My 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]
View 1 RepliesError In The Insert Of Datarows In SQL?
Feb 4, 2009I am trying to insert the rows from a datagrid(populated by a datatable).
For Each rowItem As DataRow In dt.Rows
cmd.CommandText = "Insert into table (INVOICE_AMOUNT, DAYS_INVOICED_FOR) values ('" & dt.Rows("NEW RENATAL FEE") & "', '" & dt.Rows("NEW RENATAL FEE") & "')"
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Set DataRows In DataTable ReadOnly?
Mar 2, 2012how to make DataRows in a DataTable ReadOnly? You can set DataColumns ReadOnly, but not DataRows?
I'd like to bind a DataRow ReadOnly property to my DataGridViewRow ReadOnly property. So when my DataGridView displays the underlying DataTable, if the DataRow is ReadOnly then the DataGridViewRow would automatically be ReadOnly as well. how to do this other than the way I do it below?
For Each r As DataGridViewRow In Me.dgvCurrent.Rows
If r.Cells("curAnalyteID").Value <> Me.cbxAnalyte.SelectedValue Then
Me.dgvCurrent.Rows(r.Index).ReadOnly = True
[Code]....
VB Datarows Export To Another Form?
Aug 16, 2009I've made DataGridView on my Form1(data from database i've made). And i did an event,when someone doubleclicks that row marker(that left side empty cell,when you mark all row) it opens up my Form2. I can't find a way to export those vallues(strings) in cells of selected row to my Form2,so i can use them there.
View 10 RepliesVS 2010 DataSet Append Write?
Mar 4, 2011I 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.
Write Dataset Back To Database
Jul 27, 2011I 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.
View 2 RepliesC# - Bind An Array Of DataRows To A DataGridView?
Oct 27, 2010I'd like to partition my search results (which is in a DataTable) into groups of say 100 so the user navigates through them a chunk at a time.I thought I could bind an array of DataRows to a DataGridView as the DataSource but it just does not work. This is the code I tried
DataGridView.DataSource = (From r In DataTable.Rows Skip 200 Take 100).ToArray()
I'd like to stay away using the DataGridView's VirtualMode.
VS 02/03 Looping Datarows From Datatable Select
Jun 15, 2010I am trying to use the Select on a datatable and am having some trouble. I got it to find a match on rows in a datatable I fill with data in multiple columns. But I cannot seem to loop through the results to do something with it. Here is my code below. The table is already filled with data.
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[2008] Loop Through Datarows In Bindingsource?
Jan 23, 2009I've got a bindingsource that has a datasource of a datatable
capabiltiesBS.DataSource = vendorBAL_C.capabilitiesTable
And that table looks like this
Select VendorId, Capability, LanguageFrom, LanguageTo From VendorCapabilities_T
At any rate - I do this to filter the binding source and then thought I could loop through the datarows and fill a tree view with them
capabiltiesBS.Filter = "VendorId=" & VendorId
For Each cdr As DataRow In capabiltiesBS.List 'vendorBAL_C.capabilities.Table.Rows()
[Code]....
Reinstall And Write Over Previous Dataset From A Click Once App?
Apr 18, 2012How 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.
View 1 RepliesC# - DataTable Deleting Old DataRows Before Inserting New Safe?
Apr 20, 2011i have a many-to-many relationship table in a typed DataSet.For convenience on an update i'm deleting old relations before i'm adding the new(maybe the same as before).Now i wonder if this way is failsafe or if i should ensure only to delete which are really deleted(for example with LINQ) and only add that one which are really new.
In SQL-Server is a unique constraint defined for the relation table, the two foreign keys are a composite primary key. Is the order the DataAdapter updates the DataRows which RowState are <> Unchanged predictable or not?In other words: is it possible that DataAdapter.Update(DataTable) will result in an exception when the key already exists?
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ListView/ComboBox Datasource Does Not Work With Array Of Datarows
Feb 13, 2009I want to set the DataSource Property of a listview and of a combobox to an array of datarows.
This is the Code:
[Code].....
The 'Name' column does exist, but the ComboBox shows only the type of each datarow not the contents! If I set the datasource to a datatable, the correct column is shown in the combobox/listview.
Mystream.write(t) Doesnt Work - Doesent Write Anything To My H.txt Text File
Dec 27, 2011I have a trouble making this code work. When executed, it just creates a correct (with the correct name) file with the extension .txt but the the actual text inside .
Imports System.IO
Public Class Form1
Public mytext As String
[code]...
The strange thing is that while debugging, h, t string variables have the correct values, but somehow mystream.write(t) doesnt work (it doesent write anything to my h.txt text file...
ADO.NET 3.5: Write DataSet / Table To Excel 2007 .xlsx Spreadsheet (ping Paul Clement)
Sep 19, 2011I 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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VS 2008 - .txt File - Write The File Path So That Someone Else Can Download My Program And File And Read The File
Feb 27, 2012Reading a .txt file in VB.net. My file path is C:UsersMyLilMulePepeDocumentsVisual Studio 2008Projectscurtain_calls.txt.
This is my line of Dim LoanOptionsFile As String = "C:UsersMyLilMulePepeDocumentsVisual Studio 2008Projectscurtain_calls.txt"
I can read the file when I run the program, but how do I write the file path so that someone else can download my program and file and read the file on their system?
Write A Program To Write In A Xml File?
Sep 14, 2010I want to write a program to write in an xml file in this format:
<?xml version="1.0" encoding="utf-8" ?>
- <Orders>
<Item id="1" SKU="998123" Description="Super Widget" Quantity="100" />
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Foreach In Faster Than In C#?
Mar 12, 2009My co-worker said that in a previous interview, he learned that foreach is faster in VB.Net than c#'s foreach. He was told that this was because both have different CLR implementation.
Coming from a C++ perspective, I'm curious on why this is and I was told that I need to read up on CLR first. Googling foreach and CLR doesn't help me understand.
Does anyone have a good explanation on why foreach is faster in VB.Net than in c#? Or was my co-worker misinformed?
How To Use Parallel.ForEach
Apr 15, 2010tell how to form this to the correct Syntax?ere the sample in sequential form:ForEach ctrl AsCheckBoxIn tblCKBoxCollection.Controlsctrl.Checked =
View 1 Replies.net - Action(Of T) In VB In List(Of T).ForEach?
May 21, 2009I have searched high and low for documentation on how to use this feature. While the loop I could write would be simple and take no time, I really would like to learn how to use this. Basically I have a class, say, Widget, with a Save() sub that returns nothing. So:
Dim w as New Widget()
w.Save()
basically saves the widget. Now let's say I have a generic collection List(Of Widget) name widgetList(Of Widget) and I want to run a Save() on each item in that list. It says I can do a
widgetList.ForEach([enter Action(Of T) here])
....but how in the F does this work??? There is no documentation anywhere on the intrablags.
Anonymous Methods In .NET - Foreach?
May 16, 2011I try to replace the classic For Each with the LINQ ForEach method in VB.NET
Dim singles As New List(Of Single)(someSingleList)
Dim integers As New List(Of Integer)
For Each singleValue In singles
[code]....
How should I correctly do it (using anonymous methods = without declare a new function)?
Foreach - Each Loop On A 2D Array In .NET
Oct 14, 2011I'm writing a loop to go through the first array of a 2D loop, and I currently have it like this:
For Each Dir_path In MasterIndex(, 0)
'do some stuff here
Next
But it's giving me an error, saying it expects an expression in the first field. But that's what I'm trying to do, loop through the first field. How do I fix this? What would I put in there?
EDIT: to clarify, I'm specifically looking for the 0th element in the subarray of each array, that's why that second field is constantly 0.
Iterating A List With ForEach
Mar 1, 2010I have a list like this
[Code]...
How can I iterate the list with ForEach to get one string with the emails like this [URL]
VS 2008 - Using 2d Array With Foreach
Aug 24, 2010is it possible to use foreach with a 2d array?
View 8 RepliesVS 2008 Getting Certain Info In Foreach
Aug 30, 2009What i'm doing is getting values from some html, i use a regex to retrieve all the fields, but there are some fields brought back i don't need (4 out of 11) i know the names of these fields, but was wondering if there was a way i could filter out the ones i don't need in the foreach:[code]
View 5 Replies.net - Parallel.ForEach Local Storage?
Aug 3, 2010I recently changed a For Each loop to a Parallel.ForEach loop. I'm concerned about an object being declared outside the loop but assigned while iterating in the loop. Here is the simplified code.
Dim results As ModelResults
Dim noResultsModel As New List(Of ModelResults)
Dim lock As New Object
Parallel.ForEach(_modelEngines,
Sub(model)
[Code]...
Is there a potential race condition with the results object? Would anything be different if I moved the declaration of results into the for loop?
.net - Unexpected IQueryable Value After ForEach Iteration?
Apr 15, 2012I'm flummoxed I'm using VB.Net, Linq, and a DataContext. My DataContext contains a table 'transactions'.
I first declare an IQueryable(Of transaction) and assign it to nothing. I build a predicate in a foreach loop and use a transactions.Where(predicate) to assign the IQueryable a value. If I do an IQueryable.ToList(), I get a number of items in the collection.
However, on the next iteration of the loop, the IQueryable.ToList() gives me 0 items.This is driving me crazy. I tried to use the LINQ to SQL Debug Visualizer with VS2010, (I recompiled the 2008 version with the new reference) but no dice - I can't see the SQl generated or what's inside the IQueryable.
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Changing The Value Of An Array Through A Foreach Statement?
Jun 13, 2012I am making a program that automates the seperation of a csv file. We read the csv in through and then assign the "line" using a split command to an array. After that we go through each "cell" in the array and put an = in front because this causes leading zeros not to be lost. Here's the code.
arLine = line.Split(replace)
For Each cell As String In arLine
cell = cell.Replace(",", "")
cell = String.Format(cellFormat, cell)
Next
arLine is the array and replace is the delimiter, in this case a pipe not that it matters.'
When it goes through, the arLine is correct but the values in each cell are not changing, any thoughts? newer to VB.net and need direction
Convert Collection.foreach From C# To Program?
May 12, 2009In C# i just put the method in the parentheses that i want to run on each row of the collection, but it isn't working in VB.NET.[code]...
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