VS 2010 Update Data In DataTable?
Mar 17, 2011How to make the data in the DataTable automatically change when there is the Insert, Update or Delete.my code like this:
VB.NET
Imports System.Data
Imports System.Data.OleDb
[code].....
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Use A Datatable As A Data Source To Update A Second Datatable Using Sql?
Aug 10, 2011I am updating a data table (dt_report_crypt) from an encrypted csv file in the code below:I decrypt the colums and update the same dreport_crypt, such that it will contain de-crypted data.This part is working wellI however need to use this de-crypted datatable as a data source to update a second table(dt_report), using the sql SELECT command to filter relevant data,
Dim dt_report As DataTable
Dim dt_report_crypt As DataTable
Using cn As
[code].....
VS 2010 Quick Way To Update Datatable?
Nov 14, 2011I have a table that has 9 columns, this table has about 5000 rows, but sometimes the user need to update the data in the table. The new data is in another table, with different columns names and only with 8 columns, the ninth column it's the date of the update (i know that this columns shouldn't be here...).
So for now i'm filing one datatable (the data come form a webservice that returns a dataset with this table), and after that i clean the original table and then for each row in the new datatable i call the insert command.Is there other way, better way, to do this?
Update Newly Added Data In Datatable?
Apr 20, 2012I have a Datatable where i added data from textbox when i want to edit selected datatable rows from gridview to eidit these values will be showing in their respected fields but when i click update button the only first row in gridview will be updated either i select first row or any other row in gridview for editing whereas i want to update the selected rows data. NOTE: I was design datatable visually under vb.net 2008 designer and the datatable have not any primarykey i am using following code under btnupdate event
Dim i As Integer
StoreDBDataSet.Tables("DataTable1").Rows(i).Item("Code") = txtCode.Text
StoreDBDataSet.Tables("DataTable1").Rows(i).Item("Description") = txtDescription.Text
[code]....
VB 2010 - Update Unable To Find TableMapping['Tracker'] Or DataTable 'Tracker'?
Dec 15, 2011I have a bound datagrid which I fill from various search options that are available to the end user.Currently I have one of the columns (status) set as a DataGridViewComboBoxColumn with a collection of two items. 'Open' and 'Closed'When the I select for example 'Closed' and hit the 'Update' button an exception is passed with the caption'Update unable to find TableMapping['Tracker'] or DataTable 'Tracker''I have been looking at hope the mapping works for the last 3 hours but getting nowhere fast and I really need to get this project completed by the end of the week.The bound controls are:
Binding Source = BS
Data Member = Tracker
Data Source = TrackerDataSet
[code]...
VS 2010 Filter Data With DataTable And DataView?
Feb 15, 2012I'm loading a DataGridView from a DataView which collects data from a DataTable. I use the DataView to filter, this is the
Dim dv As New DataView
dv = DataSet4.Tables("TABLA1").DefaultView
dv.RowFilter = "propietario='" + NombrePro + "'"
[code].....
VS 2010 Using LINQ To Filter Data From A Datatable?
Sep 1, 2010I am wondering if it is possible to filter data from a datatable.Sample datatable
Quote:
Sno CatID Nos
1 XYZ 25
[code].....
VS 2010 - TSQL Type Count Of Data In DataTable?
Oct 15, 2011Struggling again with doing in VB what I find simple in TSQL (sigh) - hoping that a forum member can point me in the right direction again. I have a datatable with three columns :- A, B & C I am looking to count the number of records in the datatable where columns B & C (both numeric) match specific criteria. eg :-
View 3 RepliesVS 2010 - DataTable - Change / Remove Some Data Using Loop Does Not Work
Jan 24, 2012I'm pulling data from my DB, adding it to a DataTable and binding that DataTable to my DataGridView. Before I bind the data, I need to change/remove some data. When I loop through the rows and use a Select Case, just for this column, it doesn't work. But if I use an If, it works fine. [Code] In the example above, the "Pass_Flag" row works just fine, but the "FailureCD" does not. But after the Select, with the If statement, it works. In the example, I'm casting the row as a string first and then an integer. I tried casting to an integer in the select case and it doesn't work either.
View 4 RepliesUpdate Data In SQL Server Express 2008 Using VB 2010
Jan 17, 2012Here is the code snippet
objCommand.CommandText = "UPDATE tblCustomers SET weight= @weight, height= @height WHERE id=@id "
What i want to do is the following:
I have a form and i want,by clicking the appropriate button, to update the height and weight values which have the specified primary key 'id'.
The primary key 'id' is of type IDENTITY.The problem is that the above code does not work. It says Must declare the scalar variable "@id".
VS 2010 DBF File ADO.NET Connection - Read Only - Update Data
Oct 21, 2011In VS2010 VB create a data connection using this:
[Code]...
VS 2010 List(of T) Update Data Of A Specific Member
May 2, 2011I have a List "MyList(of MyStruct)"
[vbcode]
Public Structure MyStruct
Public ID as Integer
Public Value as Integer
End Structure
[/vbcode]
At some point I need to update the Value of the member with ID=X, but I'm stuck.
Do I need to search for the index of that member using FindIndex and then set the value like MyList(index).Value=Something?
Or
Find the member itself by using Find, but how would I then set the new value?
VS 2010 List(of T) Update Data Of A Specific Member?
Apr 25, 2010VS 2010 [RESOLVED] List(of T) update data of a specific member
View 6 RepliesVS 2010 : System.ArgumentException Was Unhandled Message=DataTable 'get_item_list' Does Not Match To Any DataTable In Source
Apr 21, 2010I am working on a project that takes an xml schema and xml data files and places them into a DataTable, the 2 files are generated from a working table that i have written to disk. I wish to load these 2 files into a DataTable. Here is What i have
vb.net
Friend Function CreateTable(ByVal tableName As String) As Boolean
Dim table As New DataTable(tableName)
table.ReadXmlSchema(tableName & ".xsd")
[code]....
this however produces the following error on line 3
Quote:
System.ArgumentException was unhandled Message=DataTable 'get_item_list' does not match to any DataTable in source.
get_item_list is the parameter passed into this function (tableName)
VS 2010 Datatable - Summarize Multiple Occurrences Of An Item In A Datatable
Jun 5, 2012I have a datatable that has a resource in one field and hours used in another, it looks like this -
Resource Hours Used
Manager 1
Accountant 1
Field Staff 2
Accountant 3
Manager 4
Manager 1
Administrator 6
Field Staff 4
Manager 0.5
Administrator 1
What I want to do is be able to create a summary of the data table above that groups multiple occurrences of a resource and adds up the hours used for that resource, creating a summary that looks like this -
Resource Hours Used
Manager 6.5
Accountant 4
Field Staff 6
Administrator 7
VS 2010 - Using ComboBox To Update / Edit And View Saved Data
Apr 5, 2012I am trying to use the combobox to update/edit/view the saved data (in contact form) from sql server.
My Load_Combobox (in contact form):
Private Sub Load_Combobox()
'Type
cboType.Items.Add("Director")
cboType.Items.Add("Principal")
cboType.Items.Add("Project Manager")
cboType.Items.Add("Technical Manager")
[Code] .....
The problem now is when I saved a record into sql server (EG Technical Manager) and try to view back the saved data, it always show the first item (Director) in combobox. But, my sql server has saved is "Technical Manager" for that saved record.
VS 2010 - Update Data Source When Database Field Definition Change
Nov 11, 2010I'm using a MS Access 2007 database. I modified the field definition of one of the fields in a table, it a text field and I change the maximum length from 40 to 150. I have a data source in my app that contains this table and many others. I refreshed the data source but the change didn't take affect. I went through configure option but the change still didn't take affect. It gives me this error,
The value violates the MaxLength limit of this column.
If I add/delete a database field the data source is updated when I go through the configure process. I finally just deleted the table from my data source and then added it back.
Asp.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
How To Update Datatable
May 25, 2009I want to update a record in my database but without using "update mytblname" query.I am using following code ,
sql = "select * from customer where id = " & Val(Me.id.Text)
Dim adapter As New SqlDataAdapter(sql, conn)
Dim builder As SqlCommandBuilder = New SqlCommandBuilder(adapter)
[code]....
Its giving me error.
Update A Row In A DataTable?
Mar 5, 2009I have the following code:
Dim i As Integer = dtResult.Rows.Count
For i = 0 To dtResult.Rows.Count Step 1
strVerse = blHelper.Highlight(dtResult.Rows(i).ToString, s)
[code]....
I want to add a strVerse to the current row.
Update The Datatable?
Nov 22, 2010When i trying to update the datatable i have this error: Syntax error INSERT INTO
The code
Imports System.Data
Imports System.Data.OleDb
[code]....
How To LINQ Datatable Update
Sep 21, 2010discovered the compact mode of this instructions vs usual code. I found sample code for selecting, etc. from a datatable, transforming a column in a list or array - all operations are "Select"s - readonly.I need to make an simple update on a certain rows (using LINQ) from a DISCONNECTED datatable for which now I'm using this
for each dr as datarow in dtable.Rows
dr("MyField") = 77
next
[code].....
Update Database From A Datatable?
Apr 5, 2011I need to make a small application in which I use a datagridview that is populated with data from a table from an SQL Server.In this datagridview I marked the checkbox for adding new rows, also for modifying values, etc So the user should be able to change values inside the datagridview and when the job is finished I have 'Save' button which should Updateall changes in database.For retreving data from the SQL server I use method
Me.Bedarf_tableTableAdapter.Fill(Me.ISB_CLDataSet.bedarf_table)
and for update I use:
Me.Bedarf_tableTableAdapter.Update(ISB_CLDataSet)
I have only one problem - When I clcik on the Save button I receive a message like this:Update requires a valid UpdateCommand when passed DataRow collection with modified rows.but only if I change values from existing rows. I am adding new rows the update method is working perfectly.
Update Values In A DataTable?
Aug 17, 2011I have two data tables. dtAllResults is the master data table which contains ResultIDs and everything related to each ResultID. dtNoCV is the other data table which only contains ResultIDs. If the ResultID from dtNoCV is located in dtAllResults I want to update some checkbox cells in dtAllResults (as seen below).
I'm looking for better performance, because dtNoCV may contain a few hundred ResultIDs and I'm afraid this loop will slow things down.
Private Function prvfnc_UpdateDGVSource(ByRef dtAllResults As DataTable, ByVal dtNoCV As DataTable, ByVal intEnumValue As Integer) As String
Try
[Code]....
Datatable Update Using Merge Function
May 13, 2012i create a Class to update data from remote sql server to local compact sql server data. I write two method one method check if any update date in remote server method like..[code]Last i Call SaveLocalDatabase method. But When i check table in my local compact sql server database there has no data update.is any think missing to write. i Think i found a problem. i use LocalTable.Merge(dTable, True). When Merge Call then rowstate remain unchange.
View 2 RepliesDatatable.select And Then UPDATE / Edit
May 15, 2012I m' trying to select a row and then edit, and no error on debuggiing but the changes are not saved on the database
[Code]....
Update A DataTable From A Modified DataGridView?
Jan 9, 2011- i have a DataGridView (DGV) whose datasource is a DataTable (not BindingSource).
the DGV is used to sort the datatable before splitting the fields into different textboxes.
i can add/delete record from the DGV and the Database is modified accordingly. but it seems that i can append an existing record in the DGV thru the textboxes but the changes are not made to the database.
here is my codes for the form and buttons:
'*****This One Works Fines but it is used to add new records****
Private Sub CmdCommit_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles CmdCommit.Click
If Index <> -1 Then
[Code]....
Update A Datatable Using Syntax String?
Aug 12, 2010I get a syntax error while trying to update a datatable using this syntax string:"SELECT * FROM ClientContacts WHERE MembershipID = '" & stringVariable & "' "
View 6 RepliesUpdate A SQL Table From A Modified Datatable?
Feb 9, 2011I used the DataSet Designer to create FTWDataSet which holds the AlarmText table from a SQLExpress database.This far my form contains ONLY Datagridview1.The code below successfully shows the contents of the AlarmText table plus the one added checkbox column (which I will populate with display-only data, and is not an issue here).
Dim ta As New FTWDataSetTableAdapters.AlarmTextTableAdapter
Dim dt As New FTWDataSet.AlarmTextDataTable
ta.Fill(dt)[code]....
What else do I need to do to use the DataGridView to edit and save values in the AlarmText table?
Update Access Database With DataTable?
May 26, 2011I've been perusing some hep forums and some help books but cant seem to get my head wrapped around this. My task is to read data from two text files and then load that data into an existing MS Access 2007 database. So here is what i'm trying to do:
Read data from first text file and for every line of data add data to a DataTable using CarID as my unique field. Read data from second text file and look for existing CarID in DataTable if exists update that row. If it doesnt exist add a new row. once im done push the contents of the DataTable to the database.
What i have so far:
Dim sSQL As String = "SELECT * FROM tblCars"
Dim da As New OleDb.OleDbDataAdapter(sSQL, conn)
Dim ds As New DataSet
[Code].....
In constructing my table i use "SELECT * FROM tblCars" but what if that table has millions of records already. Is that not a waste of resources? Should i be trying something different if i want to update with new records?
Once Im done with the first text file i then go to my next text file. Whats the best approach here: To First look for an existing record based on CarNum or to create a second table and then merge the two at the end?
Finally when the DataTable is done being populated and im pushing it to the database i want to make sure that if records already exist with three primary fields (DriveDate, DCode, and CarNum) that they get updated with new fields and if it doesn't exist then those records get appended. Is that possible with my process?
