VS 2008 Size Of Data In DataTable?
Apr 21, 2010Is there a way to determine how many bytes of data are in a DataTable after I've filled it with data from my query?
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VS 2008 Datatable Not Display Actual Size Of Data?
Feb 3, 2011my .net app output data from sql server to a datatable in my app using executreader.for example:one of the column size in sql server varchar(40),actullay the field only contain 2 chars (like: "AB" for example)when it executes into datatable,it display in the column like "AB" <<this chars + white space = actual size of the column,but I want only the size of the data only, which is "AB" when I export it as csv file the field is >> "AB?
View 4 RepliesVS 2008 : Add Dynamic Data To Datatable?
Oct 4, 2010I am creating a data logger that pulls data from an existing OPC server. When the data logger is launched, I look into the OPC server and get the names of the sensors that need logging (ColumnNames() as string) . From that, I am creating a data table with columns based on the items in ColumnNames(). That part is working. What I am having problems with is adding rows to the table. When I read the values from the OPC server, I get an array of strings (values() as string) which is guaranteed to be in the same order as the ColumnNames.I have been trying to use an SqlDataAdapter with a dynamically built insert command, but it is getting extremely convoluted and ugly.Is there an way to add a data row to my table using an array of string values directly?
View 5 RepliesVS 2008 - Updating - Datagridview With Data From A Datatable
Nov 17, 2009I have a little big problem in one application.
I have a datagridview with data from a datatable, this datatable have these fields (id,num1,num2, date,user,ref,qt,cost,center), some of them are hided in the dgv (id,num1,num2,date,user). The user can edit,delete and add new rows to the dgv.
I have a save button that performs this actions:
First check if there are new rows, and if yes it fill the hidden fields. Then validate the inserted values by the user with a couple of ifs. In the end, i call the bindingsource EndEdit, and call the adapter Update command against the datatable...
This sometimes works others not really, i don't understand why.
The error it's: "Concurrency violation: the DeleteCommand affected 0 of the expected 1 records"
I think sometimes when Updating it occurs to.
VS 2008 Randomly Select DataTable Row And Get Data?
Dec 19, 2009The next step is I need to build a randomizer to randomly select a row and read the columns of that row into varibles.I have a working randomizer that can randomly pick a number between min and max values but what I don't know if how to select a row / How to find out how many rows are available and how to read the values into varibles.Am I right in declaring an Integer Varible then using:
AvailableRows = DDT.Rows.Count
Then use my Random Function to pick a number between 0 and AvailableRows
VS 2008 Refreshing The Datatable With Current Data From The DB?
May 7, 2010I load up a datatable - bind it to a binding source and a binding navigator - and lots of textboxes on the screen bound to that as well.When I get a concurrency violation - another user has already changed my vendor, let's say - what is the best method to go about refreshing the datatable with current data from the DB?
View 10 RepliesVS 2008 Using Datatable.readxml No Data Is Loaded
Apr 4, 2011I've a xml file to load into the datatable, but no data is loaded, also without any error. the output is 0.[code]
View 2 RepliesVS 2008 Way Of Returning Datatable Data As List?
Sep 29, 2011I have a Business Logic Layer that contains function that return datatables. I'm writing a function that will return just the records that begin with the string passed in. this is what I've come up with so far:
Public Function FetchBusinessAreas(ByVal area As String) As List(Of BusinessArea)
Dim AreasList As New List(Of BusinessArea)
Dim dt As DataTable
[code].....
VS 2008 - LINQ Query Against A Typed Datatable That Will Return Me Duplicated Data?
Jan 25, 2010I'm trying to do a LINQ Query against a typed datatable that will return me duplicated data.With out going into too much detail, here's the basic setup:
strCode1 - string type
intCode1 - int32 type
intAdjustor - int32
There are more fields but these are the ones that are important.I'm going to do my best to describe this, as it's kind of confusing.In theory intCode1 is a key for strCode1 (hence the names). So each time intCode1 is duplicated, the same strCode1 should appear. Example:
[code]...
Ultimately I'd like to get a List(Of T) - where T is my typed data row. In SQL, I would simply use a sub query, to get a distinct list of strCode1 and intCode1, then do a count, grouped by strCode1 where I get more than one row.I'm not sure how to translate that into LINQ, AND get the original types data rows returned in a list.
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
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 2008 Resize A Picturebox Dynamically Using .size.height And .size.width
Nov 20, 2009Im trying to resize a picturebox dynamically using .size.height and .size.width Its not working. This is the error message: "Expression is a value and therefore cannot be the target of an assignment." Never used height and width before. Been trying to find the answer, but it seems beyond me. Im sure its easy. Anyone know whats wrong with this?
[Code]...
Export/save Data From Datagrid/datatable To Excel In VB 2008 Express Edition?
May 4, 2009I'm using the 2008 express edition. Now, I created an application that will allow the user to choose transaction in the combobox.text and input its price and quantity using an textbox.text. When the user click button1, it will be push in the datagrid/datable I created. And when the user click the button2, it must be save to excel file. The only thing I need is how to save the data from datagrid/datatable to excel. This is my code.
Imports System.Data
Imports System.Data.SqlClient
Imports Excel = Microsoft.Office.Interop.Excel
[Code]....
VB 2008 Express/ Webpage To Fit The Size Of The Webbrowser1 Control Size?
Jul 13, 2010I have wondered the solution to this question for many years! I doubt if anyone else knows much about it because the internet is absolutely zero help in this!
I have made a form1 with a webbrowser control on it. When the program is run it brings up the homepage (which is Google). However the homepage doesn't seem to fit inside the webbrowser control.
So I am hoping that someone could tell me how to make the (...I dunno how to ask this retarded question...) webpage fit completely (100%) inside the size of the webbrowser control. Meaning...I would like to see the entire webpage from the internet in the
size of the webbrowser control. To fill the entire size (whatever size I want).
Etc... if my webbrowser ontrol is seh, set to 600px by 400px, how can I program this so when it brings up the homepage (or any other page), it fills the entire size of the webbrowser control? Without any scrollbars. How to make the contents from the web
(or local) fill the size of the webbrowser - almost like a mini browser if you will.
VS 2008 Datagridview - Loading Data From Sql Server Datatable - Modify Or Delete The Product List
Feb 3, 2012I have a vb.net form to add, modify or delete the product list..i have a datagridview in which i m loading data from sql server datatable...now i have a text box which accepts code for the product..i want that when i press a key, all data starting with that key should be highlighted in datagridview.....
eg
i have product codes
A001
A002
A003
C001
D001,, etc..
Now i press A in text box...in datagridview all data with A should be highlighted
VS 2008 Form Size Compatible On Different Screen Size?
Mar 5, 2010I developed a form application on my computer, but when it was used in another computer with different screen size, i was told the form didn't fit. Do I have to adjust the form size or any other ways to let the form compatible on different screen size? (could be different screen size or wide screen)
View 2 RepliesVS 2008 Textbox's Size Depends On Form's Size?
Aug 22, 2011So that's how I want it:
If I re-size the form, the textbox inside should be re-sized to fit the form, NOT DOCK!
VS 2008 Nesting A Datatable Inside A Datatable?
Mar 16, 2011Is there a way to nest a datatable into another datatable? I know you can do this with gridviews but thats not what I'm looking for.
Also, I don't want to merge the datatables. What I'm trying to do is have a datatable with 2 columns and each column containing different datatables.
VS 2008 : DataTable Filter To Another DataTable?
Mar 11, 2010i have a datatable with some data, i need to select some of the data, and put that data in a new datatable.
View 1 RepliesStructures - Fixed Size (Overall Size And Item Size)
Jun 8, 2011Now all went well about from using the structure correctly. The working of the structure was perfect. How ever i missed Two important issues. The structure needed a fixed size of 10 items (9 in programming terms starting from 0) And also out of the 5 items allowed to be chosen as one of the member types for the structure a limit of 5 items of that particular type.
[Code]...
.Net:Sum Data In DataTable?
Mar 29, 2011I would like to sum data in dataTable from to if ColumnLine <> SA sum only HINKSHKEY = 1 if ColumnLine = SA sum all data I try to use code below but it not work.
[Code]...
How To Get Data From A Datatable
May 19, 2010I'm not really sure how a datatable is really used, but I've used it in an application I'm writing, by way of examples I've found online. Basically can anyone give me an explanation of datatables in laymen's terms? Second I have an example to discuss. I have a datatable that is filled with a result from a MySQL query. How can I populate a textbox with a specific item from the datatable?
View 2 Replies.net - How To Select Data From Datatable
Feb 23, 2012I am little bit stuck here .. I have a datatable as _
Dim dtPupil As New DataTable
dtPupil.Columns.Add("PupilId", GetType(Integer))
dtPupil.Columns.Add("Forename", GetType(String))
dtPupil.Columns.Add("Surname", GetType(String))
I made a select (assuming names combination will be unique)
Dim strQuery As String = "Forename ='" & forename & "' and Surname = '" & surname & "'"
Dim dr As DataRow()
dr = dTablePupil.Select(strQuery)
I wanna have PupilId as an Integer of the row that match, so
Dim PupilID As Integer = ??????????
What do I need to write here ? There will only be 1 row returned.
Adding Data Into DataTable?
Jul 15, 2010i have a problem when add data into dataTable. The problem is that after populating the dataTable with the 1st, and when adding a 2nd column, the row that contain the data is not at 1st row of 2nd column. It is directly under 1st column row. For example, column 1 has 10 rows of data. After adding the 2nd column, the data is at row 11 instead on the 1st row. Can someone tell me how to add the data for 2nd column so that it will be in the 1st row. Code for adding the data
Dim col1 As DataColumn
Dim row1 As DataRow
col1 = New DataColumn("Column 2", System.Type.GetType(" System.String"))
dTable.Columns.Add(col1)
[code]...
Convert Csv Data To DataTable?
Jun 20, 2012I am trying to import a large array of integers stored as a csv file into a VB.Net DataTable called BeamMap. The .csv file consists only of integers, with a delimiter of ,, no quotes around the data (ie., 1,3,-2,44,1), and an end of line character of line feed and carriage return. All I want to do is get each integer into a DataTable cell with the appropriate rows and columns (there are the same number of columns for each row) and be able to reference it later on in my code. I really don't want anything more than absolutely necessary in the code (no titles, captions, headings, etc.), and I need it to be fairly efficient (the csv array is approx. ~1000 x ~1000).
View 2 RepliesDatagridview Data Into Datatable
May 21, 2010How to copy all datagridview data into a datatable ?
View 1 RepliesHow To Get Statistical Data From DataTable
May 18, 2011Using VB .NET, I am wondering about the best way to get some statistical data out of a Datatable. I would rather not hit the database with another query, but just look through the datatable I already have. So, Linq must be the answer? I have a datatable (dtable) containing two columns: tech_id and colour. From this, I would like a new datatable containing three columns: tech_id, colour, and count. Of course, I'm trying to find out how many times each "tech_id" used each distinct "colour".
Something like:
tech_id colour count
------------------------------
JM brown 18
JM purple 10
JM green 3
PB brown 51
PB grey 8
TD brown 4
TD pink 67
TD grey 41
My best attempt with Linq is not at all correct, but is pasted below to show how far I've got:
Dim ColourCounts = From p In PGWorkingDataTable.AsEnumerable() _
Group p By p.Field(Of String)("colour") Into Count() _
Select tech_id, colour, ColourCount = Count
Dim colourStatsTable As DataTable = ColourCounts.CopyToDataTable()
Retrieve Data Of Datatable?
Feb 4, 2009I have a dataset and inside it a dataTable. How can I retrieve the data of the datatable?[code]...
View 4 RepliesRetrieving Data From A Datatable?
Aug 3, 2011I'm using two textbox's to enter text and retrieve the data and then show that data in a datagridview.Here is my
Dim con As New OleDb.OleDbConnection
Dim dbProvider As String
Dim dbSource As String
[code].....
Sorting Data In Datatable
Jun 11, 2012I would like to sort data in my datatable I am focusing on one of my columns that I want to sort in ascending order. Currently I have been using the following code
[Code]...
I nwant to sort the data so that I can output the data in a gridview.