i have this code that i am using to read from an excel spreadsheet but it i giving me an error saying that i am not not giving the exact name of the table.i have uploaded the excel spreadsheet as well. [code]
View 5 RepliesThe following code works fine but seems to leave instances of excel.exe running in the background. How do I go about closing out this sub properly?
Private Sub ReadExcel(ByVal childform As Fone_Builder_Delux.frmData, ByVal FileName As String)
' In progress
childform.sampleloaded = False
[code]....
in VB is there any situation whereby x = Nothing is not the same as x is Nothing?Also, x <> Nothing vs x IsNot Nothing.
View 1 RepliesThe following is a function to read a value from a field in a database, then add a value to it, and restore it.The three possible columns it reads from are Hoodoo, Give Them, Snug.It works no probs for hoodoo and snug, but not for Give them..[code]Index Out of Range Exception was unhandled. The text visualizer says that the value of night is give them.I can see the column give them in the database, so what could be going on?
View 3 RepliesI have this situation: a Form with a System.Timer in it (with AutoReset = False). The form has its main thread and the timer its own thread too (nothing new here). When the user press a button I need to stop the timer, wait until the timer thread has stopped its execution and do something more.
On the other side, the timer updates an item at the form so BeginInvoke is used. The code looks like this:
Button Code: Private Sub ButtonStop_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ButtonStop.Click
[Code]...
The point is that I wait the main thread to let the timer thread to end its work.The problem is that this code deadlocks when the user clicks the button when the BeginInvoke is going to be called. How a simple thing like this one can be done? Looks like I cannot find a good solution to this problem
So, I have an app that uses a SQL Server express db. I have about 80ish tables all with a primary key but no foreign keys. (The reason we have no foreign keys is because of how we do our sql client-to-server replication. It's not true replication but it's a sync system that was in place when we took over the app. We have no guarantee what records are going to make it to the database first when a client syncs to the server so it is possible that a record would make it to the database with a foreign key that points to a nonexistant record). We use a type-per-model convention. For each of our business objects there is a table in the db. We currently use stored procedures for every database transaction. This means for every new class there is at least 4 new stored procedures (crud). We have abstracted out our data access layer from our business objects. Each business object has a corresponding businessObjectDAO.
My question is, is entity framework feasible for me to move to? With no foreign key relationships I'm going to have to set up every association between tables manually.My biggest hang up right now is trying to figure out how I map my DAOs to the EF partial classes. Should I be creating one big .edmx or multiple? A lot of questions I know. This is my first big architectural type decision and I've been given the go ahead to make the change if I think it is beneficial and feasible. Maybe I should try Linq-to-SQL? NHibernate is out because we're not allowed using open source products in production (stupid, I know).
So I have[code]...
It would give me 5 instead 4 results, since <title>My Channel</title> is considered one of the item under channel. I'm just wondering if there is anyway to loop through only the 4 item elements.
I have a Check Box that the use checks to indicate that a specific situation is present. When the User checks the box he gets a Message Box reminding him that the condition must be fulfilled. This works fine and the database reflectthe fact that the Check Box is filled.
At a later date, if the user calls this record and fills the form, the Check Box is triggered and the message Box appears in the middle of the form fill operation.
Is there a way to prevent this from happening. I want the Check Box checked but don't want the message box if the change is triggered by the fill process.
I want to create multiple dataset depend on situation. dataset number may vary each time.how can we create multiple dataset
View 4 RepliesI am trying to build an app that can search column A in an excel document (with textbox control). In column B, I have info about the column A items. When a column A item is searched, I would like a textbox (or similar) to display info about it from column B.
I have never done any Excel related programming, so I don't know what to do, or where to start.
.Cast(Of Double) extension method not working in a particular situation.However I can get my own extension method .CastToDouble working.Would you call this a Framework bug?see the commented out line of code in the code below.Similar code posted in my last post in this thread: http:[url].....
Option Strict On
Option Explicit On
Option Infer Off[code]......
I'm trying to read an Excel xls file into a dataset with OLE. I can do that, but it's loosing data. The sheet is formatted with merged cells on the first 11 rows and after that it's just a table. I need to read this with OLE, because the server on which this web-application is working does not have Excel installed.
If I remove the first 11 rows with excel, then save it and then let my program read it, all is fine, but with those rows, it's ok. The excel sheet has header names in row 12. After the read in to the dataset, some of those cells with the header names are empty. I assume this is caused by the formatting. Is there any other way to open and read an excel file on a server without Excel or expensive dll's? Is it possible to open the xls file with OLE, delete the first 11 rows before using da.fill(dataset,tablename)?
I have a .csv file (created by external program). In my vb.net application I want to read the last cell value. External program updates the last cell value every 3 sec.For this I use the below code. But cpu usage increases (because timer event opens&closes new excel sheet every second)I was successfully doing this with vb6 without any problem, but with vb.net I'm stuck.
[Code]...
I have a VB.NET app which pulls some data out of an Excel file and puts it into XML.Originally, I read from the Excel file using an OleDB connection but then when we deployed the app to the test server, it gave an error saying that some Jet database components needed to be registered on the server to read from Excel and we're not allowed to register those on the server.Then, I rewrote it using the Microsoft.Office.Interop Excel components. Apparently, however, that needs to have Excel registered on the server in order to work and we can't install that either.Is there another way to read data from Excel using VB.NET which doesn't require anything but the .NET Framework on the server the app is running from? It's just a few simple rows of data with no formulas or macros or anything and I just want to grab the data out. It seems to me that this shouldn't be all that complex.
View 13 Repliesi am importing data from Excel workbook having around 30 sheets in each book. Application works fine but after uploading few books it gives error continuously Exception from HRESULT: 0x800AC472 i used thread.sleep(1000) for each workbook into folder remove that? if these due to hyperlinks in some sheet, is any way to disable hyperlinks through code in vb.net
View 1 RepliesI'm developing application in VB.NET 2008.I'm reading data from Excel through OledbConnection. Here data are reading sometimes perfectly but sometimes it is missing to read some data.
Example :In Excel ,I have 79 columns in excel and 4 rows , first 3 rows are headers so after import i'll delete that rows and actual data starts from 4, so here i have only one row.After Reading through oledb, that dataset's datatable has only first 3 rows( first row became header and 2 & 3 row only in datatable, its ignoring 4th row)
[Code]...
I am having problems reading the contents of an excel file into a combo box I am using the following code but the only thing that is populating the combo box is "System.__ComObject"
XLbook = GetObject(pthSup & "offices.xls")
XLsheet = XLbook.Sheets("Offices")
Dim i As Integer
[Code]....
I am relatively new Visual Basic and programming in general and I am trying to update a program I wrote for AutoCAD in VBA to the .NET frame work
I have a little problem and i don't know e an excel sheet with with over 4000 rows and i need to go through that sheet and look at the length of each 1 cell and get the amount of characters in there and put that into another cell like below
[fixed]1
New cell10
[code].....
I'm a new VB programmer, although I have a decent background in java.Anyways, I'm learning VB and I'm trying to read data from an Excel file using VB 2008 and can't figure out how to accomplish this. I can't seem to get any data from the Excel spreadsheet to display in a simple Windows form. Also, there's a decent amount of data in the spreadsheet so I was wondering if it makes sense to just read data as needed from the excel spreadsheet or if there was some type of data structure that I could import the entire Excel spreadsheet into and do my analysis from there.
View 1 RepliesI have a question about reading data from txt file and importing(transfer) to the existing excel file.for example I have "test.text" which includes some numbers listed below.[code]I want to put each number to separate excel cells by using Vb.net.
View 1 RepliesI have never read from an excel file in VB.NET before so sorry if anything is off.I am downloading an .csv file from a vendors ftp service that has 8 columns ( style # - mfr.item # - description - metal type - availability - center weight - total weight - retail value )I am trying to retrieve all data in the rows bellow style # and retail valuethere are roughly 4,649 rowsI am not sure how to do this.
I load the excel file using the microsoft.office.interop.excel:
Dim eApp As excel.Application
Dim eBook As excel.Workbook
[code]....
I am trying to read an Excel workbook with VB 2008. I am fairly successful but I need to make the code more flexible. Currently I use.[code]There are a variable (unknown) number of sheets within a workbook, all with the same format, and their names are given in "SHEET NAMES". What I need to do is now loop through these remaining sheets and transfer the data. I can do this into individual "cells" arrays but I would like them in one 3-dimensional array, something like sheets(sheet-number,columns,rows)I am new to VB and I'm not too sure about variant type, but any suggestions would be most welcome.
View 2 Repliesjust as I would read an SQL file in order with code such as:DCReader02 = DCCommand02.ExecuteReader()While DCReader02.Read() End While I am looking for the equivalent code to read each line of an Excel file until end of file. The Excel file was opened with
Microsoft.Office.Interop.Excel.Application / Workbook / Worksheet coding.
I want to get a value from 12 excel sheet. is there any way that i get the values without opening the excel sheet? I am using vb.net. if there is a way to read values without opening the excel file.
View 3 RepliesI just tried to read data from an excel sheet. I just found some code on net. But it is not working for me. I'm unable to debug, since i don't know how to make use of the ADO.Net [Code]
View 3 Repliesin what situation will an item in System.Collections.Generic.List not be removed successfully?url...The way they phrase it makes me think that it is possible that a Remove operation on an item found in the List(Of T) could actually fail.
View 4 RepliesAnyone know why the Mouse_Leave event fires when you don't leave the control with the mouse pointer?Put a large button on a Form so your mouse pointer does not leave it easily.Then try this codeWhen you do, leave the mouse pointer in the middle of the button and then click the button.By the way, if you uncomment the 1st line of code in the Button Click event and comment out the MessageBox, this does not happen.Can someone please explain this behaviour?
Option Strict On
Option Explicit On
Option Infer Off
[code].....
i am not getting the integer values in dataset while reading from an excel files the field which is integer will be showing as NULL.
View 1 RepliesI want to create thread for reading data from Excel. I found this link.url...I download the sample project and tried to run the project.First I build the project using visual studio 2005 and add reference the NetFX20Wrapper.dll..When I run the project, I got error "ActiveX Component cannot create obect" in the Line "Set background = New NetFX20Wrapper.BackgroundWorkerWrapper"
View 2 RepliesI am reading XLS files, via JET provider, using the following
Dim conString As String = "Provider=Microsoft.Jet.OleDb.4.0;data source=" + fileName + ";Extended Properties=""Excel 8.0;HDR=Yes;IMEX=1;"""
cn = New OleDbConnection(conString)
cn.Open()
da = New OleDbDataAdapter("SELECT * FROM [" & sheetname & "]", cn)
da.Fill(dt)
The problem I am facing now is that some of these excel files have hidden columns: These columns are meant to be ignored. However, the code above fills my datatable with ALL columns (hidden and nothidden). Is there any "Extended Property" that I could add to the connection string, to ignore hidden columns?