- Extract/convert Information From A Listview (to A DataTable)?

Jan 4, 2010

I have a relatively simple Listview that suddenly needs (due to new requirements) to have it's 'layout' extracted to a DataTable so that a common routine can convert it to an Excel spreadsheet for export purposes.The ItemTemplate is just a series of Table Rows with some text, data-bound labels and textboxes with validators in the cells.Usually, when trying to pull out a particular value (like what was entered into a text box), I use the ListViewItem's .FindControl method.

For Each objItem As ListViewItem In lvwOptions.Items
Dim objTextHrsLabor As TextBox = CType(objItem.FindControl("txtHrsOptByLabor"), TextBox)
decHours = CDec(objTextHrsLabor.Text)

In this case, however, I'm trying to take all the data displayed - all the 'rows and columns' of the table that was created.Inside the ForEach / Next loop of ListViewItems, I started a ForEach/Next loop of Controls for each instance's controls but I got some really strange results returned (like controls that had a couple of table cells in them).

I get the sense I'm headed in the wrong direction. All I want is for the nicely-formatted 5-line, 6 column table to be converted to a 5-line, 6-column data table.

View 3 Replies


C# - How To Convert Listview To DataTable

Jun 22, 2012

I have seen many examples of populating a listview from a datatable or converting a datatable to a listview but what I am trying to do is exactly the other way around.

How can I convert/copy the contents of a winform listview to a datatable?


I have a listview with a context menu where users can multiselect items and choose one of the context menu options, I then loop the selected items and extract each selected row (listview item) and serialize it, instead of doing this I wanted to convert the listview to a datatable then add the datatable to a dataset and serialize the dataset.

View 2 Replies

Method Which Check If A Certain DSN Exists Then If It Does Extract Information And Use Information For Connection Purposes

Feb 2, 2011

I was looking for some stuff online, and i was looking through my reference sheets for, but it seems in the code i have found, there is declare in methods. Below is an example i am talking about. The thing is, that i dont recognize it and believe that it is an earlier version of Visual Basic ( 6 or earlier) which used it. Should i just keep looking for different code?

Public Declare Function RegOpenKey Lib "advapi32.dll" Alias "RegOpenKeyA" (ByVal hKey As Long, ByVal _
lpSubKey As String, phkResult As Long) As Long

Goal: Find information on how to implement a method which will check if a certain DSN exists, and then if it does, extract the information and use the information for connection purposes.

View 2 Replies

Extract Information From A Path

Sep 28, 2010

am using visual basic 2010 express and i have managed to place the path to a file in a text box. how can i extract just 1 item from the my path is url.i wish to extract mine (nothing else) and put it into textbox2.

View 8 Replies

Columns Of Listview Can Be Resized Automatically Based On Information In Listview?

Feb 15, 2009

I would like to know if it is possible if the columns of the listview can be resized automatically based on the information in the listview?

View 4 Replies

Extract Information From A Text File

Jan 27, 2010

i have this assignment (task sheet attached) but i dont know exactly where should i complete from. i need to extract information from a text file. it involves a complex string manipulation. here is the code that i already did but i am not sure how can i extract the information i need from the appendix in the yask sheet. [code]

View 4 Replies

Extract Information From A Video File?

Nov 8, 2009

Extract information from a video file?

View 5 Replies

Extract Information From The IDataReader Object?

Feb 16, 2012

I have two cases to extract information from the IDataReader object

Case - 1 - Length, calculates ordinal and then parse string

public static string GetString(IDataReader rdr, string columnName)
int ordinal = rdr.GetOrdinal(columnName);


Which technique should be preferred and why and if any specific context ?

View 3 Replies

How To Extract Information From 'IADsUser PostalAddresses'

Jan 18, 2011

I am attempting to extract information about a work location from the IADsUser object. Other IADsUser methods like IADsUser::LastName or IADsUser: :EmailAddress return a string.I thought IADsUser::PostalAddresses returned a variant (array of strings) and I have attempted to extract the infromation, but I have had no success so far. I can find very little documentation on how to extract this information.I have provided some code below to try and make it clear what I am trying to do.[code]I am not sure how to print out objects properly in VB6. I am not concerned whether or not a particular IADsUser has the information I am looking for; I have error handlers in place to check for this. I removed them to make the code easier to read.

View 1 Replies

VS 2008 Regex - Extract Information Between Two Tags In Some Html From The Source Of A Website

May 24, 2009

what i am trying to do is extract information beween two tags in some html from the source of a website. The contents of the text between the two tags will always be different. the code i currently have is;


View 12 Replies

Convert A Datatable Using A Reference Datatable

Apr 26, 2012

I am finding difficulties to convert a datatable to a new datatable using a reference datatable. My question is confusing and I am not good at explaining things so I drew a picture (see below).I have two datatables on memory and I need to create the third datatable using the second mapping table for reference. The column names are just for example and it can't be hardcoded.

View 2 Replies

Parse Live HTML From A Website And Extract Specific Information And Store It Into A Database With Visual Basic?

Dec 30, 2011

The info i need extracted is formatted:

<TD><A HREF=""><IMG SRC="../xxxxx/thumbnails/xxxxx.jpg"> </A></TD>
<TD>=== <B><A HREF="">LINE 0</A></B> ===<BR>
<FONT SIZE="2" COLOR="#400080">


how do i extract the info between TD=== and /a and Line 1,2, and 3 and store it into a database from a live website?

View 2 Replies

Extract HTML Table Into Listview?

Nov 14, 2011

I'm wanting to extract a table on a regular basis from an HTML web page in to a listview control. Before I start the long winded manual process (which I'm sure I can do, finding strings etc). I was wondering if there was a built-in way with VB.NET?

View 6 Replies

Extract Icon From Exe And Convert To Bitmap?

Jun 21, 2009

After scouring the forums for a code to extract icon from exe and convert to bitmap, i got that working, and the image will display on my form just fine. I want to save the image so it can be loaded again after the program is closed, but I get "Generic error in GDI+ occurred" when I attempt to save the bitmap.

Dim ExeIcon As Icon
Dim button1icon As Bitmap
ExeIcon = System.Drawing.Icon.ExtractAssociatedIcon(Filename)
button1icon = ExeIcon.ToBitmap()
Button1.BackgroundImage = button1icon
button1icon.Save("C:utton1icon.png", System.Drawing.Imaging.ImageFormat.Png)

View 4 Replies

Possible To Convert PDF To XLS File To Extract Data?

Sep 8, 2009

I want to extract data from pdf .Is it possible to convert pdf to xls using some kind of COM object.

View 4 Replies

Save Information From DataGridView As A New DataTable?

Jun 29, 2011

I have compiled some information into a DataGridView.How can I save all this DataGridView info into a DataTable?

dt As New System.Data.DataTable
dt = DataGridView1.DataSource

View 7 Replies

Get VB Codes Extract Frames From A Webcam And Convert To Greyscales?

Jun 22, 2010

need VB codes extract frames from a webcam and convert to greyscales

View 1 Replies

Calculate Running Total In Listview Group Extract From Database?

Dec 30, 2011

I'm developing Asset Management System, it will compute for straight line depreciation, my problem is how to calculate running total on each group that I've extracted from my database.Here's a snippet for my extraction of data

Private Sub cboAType_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cboAType.SelectedIndexChanged
If Not cboAType.Text = "-" Then


View 4 Replies

Extract / Convert Values From JSON Response To A Object And Vice Versa?

Sep 14, 2011

I'm getting a JSON response after accessing a web service with my window application written in VB.NET. How can I convert the JSON response to a VB.NET object and vice versa?

View 1 Replies

Access The Information In A Populated Listview

Mar 16, 2010

I need access to the information in a populated listview so that I can load some textboxes with the contents of the selected row.

View 2 Replies

Convert Input Box Information To The Listbox In VB?

May 21, 2010

How do I convert input box information to the listbox in visual basic I'm trying to display my information in the listbox as shown vehicle speed : (the number entered here) time traveled: ( number of hours entered here)


View 4 Replies

Loading MS Access Database Information In ListView

Jun 22, 2010

I'm having a problem with loading my MS Access Database. I can get it to load but it won't load in a row. My friend told me to try this but it puts all the information in a column instead of putting all the information spread out accross the row.

Here's my code:
Dim lb_Connection As New OleDb.OleDbConnection
lb_Connection.ConnectionString = "PROVIDER=Microsoft.Jet.OLEDB.4.0;DATA SOURCE = pass_database.mdb"
Dim lb_SelectCommand As New OleDb.OleDbCommand
[Code] .....
Also I'll attach an image of what the program does when I load it.

View 2 Replies

Specify Which Information To Insert Into The Specific Column Of A Listview?

Jun 22, 2009

txtMsg.Text = "Message from " & e.MSISDN & " . Message - " & e.TextMessage &ControlChars.CrLfand i want to change it to insert into a listview instead.Eg inserting the e.MSISDN information into a FROM column of the listview.

View 2 Replies

VS 2008 Add Information To A ListView From A BackgroundWorker Thread?

Nov 30, 2009

I'm trying to add information to a ListView from a BackgroundWorker thread. I thought I could do this in this manner:
Private Delegate Sub _ListView(ByVal lvi As ListViewItem)
Public Sub test(ByVal lvi As ListViewItem)


When I attempt to run the "test" sub the BackgroundWorker, I get an error:

Argument not specified for parameter 'lvi' of 'Public Syb test(lvi as System.Windows.Forms.ListViewItem)'.

Is there something I need to specify when declaring the sub, or in the sub itself?

View 8 Replies

VS 2008 Insert Information In A Database Into A Listview?

Dec 15, 2009

Okay, I've made a local database now and everything is okay. But I don't want the normal data grid view, I want to display the information in a list view. How can I do that? Do I have to make some sql queries or something?

View 8 Replies

How To Fill A DataTable With A List(Of T) Or Convert A List(Of T) To A DataTable

Nov 26, 2009

I have read many posts on this topic; among them and most recently .NET - Convert Generic Collection to Data Table. Unfortunately, all to no avail.

I have a generic collection of structures :

Private Structure MyStruct
Dim sState as String
Dim lValue as Long
Dim iLayer as Integer
End Structure

Dim LOStates As New List(Of MyStruct) I need to fill a DataTable with this list of structures but have no idea how to go about doing this. I am using in Visual Studio 2008.

View 1 Replies

Bring DataTable To Listview?

Oct 8, 2011

Im using 2003 and working desktop application.I want to bring DataTable data to list view where their columns are already added.We want to jus point the index to arrange data.

View 1 Replies

.net - Convert DataTable To Linq?

Feb 10, 2010

I'm trying to convert DataTable to Linq using

DIm result = From r in dt.AsEnumerable()
Select new ( col1 = r.Field<integer>("id"), col2 = r.Field<string>("desc"))

But i get error near 'new (' saying type expected.

View 2 Replies

Convert A DataTable To List (of T)?

Apr 28, 2012

convert a dataTable to List(of T).In on .Net 3.5 If you know How To or maybe a link of somebody who did it.I check this on c# (from another stack question)

public static IEnumerable<T> ToEnumerable<T>(DataTable dt, Func<DataRow, T> translator)
foreach(DataRow dr in dt.Rows)


but I cant translate Func on .net 3.5?

View 1 Replies

Convert Csv Data To DataTable?

Jun 20, 2012

I 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 Replies

Copyrights 2005-15, All rights reserved