Excel As Datasource For Axspreadheet Object?
Dec 11, 2009Can anyone tell me how to assign an excel spreadsheet as the datasource for an axspreadsheet object?
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Datasource Object Reference Not Set To An Instance Of An Object?
Jun 24, 2011I wrote an ASPX file in VB.NET. Originally this file ran successfully but after adding one additional parameter it now fails on "Object reference not set to an instance of an object" on line "peType.DataSource = arrPEType" below.This error does not make sense to me though because I have similar parameter, 'dType', which it does not error on. What is the cause of this error?
Here is some of my ASPX code file:
Sub Page_Load(Sender as Object, E as EventArgs)
If Not IsPostback Then
[code].....
ASP.Net Dynamic Excel Creation From SQL Datasource?
Feb 15, 2012I have a reguirement to enable the creation of excel workbooks from sql stored procedure. To do this I want to create a vb class to generate and save the excel files. Then and ASP.net page will enable opening the excel file via the browser or enable the user to download the file.The class should be able to be called from a vareity of pages within the web app and have the ability to handle 8 to 10 separate stored procedures that will return various data sets.
View 2 RepliesDatasource Or Linq Result To Excel?
Aug 3, 2011i have found alot of sh*** right now. But not the things that im looking for.
I need to export a LINQ query (or the Datasource of my DataGridview)
to an existing Excel Spreadsheet. Lets Say after Cell A25
I have a Windows Form application using LINQ for the Databindings.
C# - Using Excel Sheet As DB (datasource With Connection String)?
Sep 14, 2009I have the following database defined in app.config now:
Provider=Microsoft.Jet.OLEDB.4.0;Data Source=|DataDirectory| able.mdb
can I use excel instead as datasource there? are there any limits if I use excel file, the database is simple 300 rows, and it would be more handy to use excel file.does excel need to be readonly?
.net - Set A Code Object As The DataSource For A ComboBox, Using XAML?
Sep 24, 2010I've gotten to a point where I'm trying to add a ComboBox to a UserControl, and to populate it from a collection which exists in code.
I've been getting along pretty much on monkey-see-monkey-do coding for the most part; copying and adapting existing code in order to get the next stage working, but this DataSource stuff has me stumped. I've been through a whole bunch of articles on MSDN this morning and am no closer to understanding than I was when I started.
Let me go through a few of the things that are messing with me, and hopefully you guys will be able to point me in the right direction:
1) None of the [UserControlName].vb files contains any code. All of the code for the UserControls is stored in [UserControlName]Model.vb files, and then code of the following sort is used:
<UserControl
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:l="clr-namespace:MySolution"
[Code]....
1.5) (using bullet points means I can't use <> brackets or code blocks later on. What the hell, markdown?) Anyway...
2) I'm pretty sure I only want a Static Source for the moment, as the items in the ComboBox aren't going to change during execution, at this time. Problem is, all the articles I can find about this are gigantic, complex things about creating XML readers, and populating DataGridViews and sorting data, and on and on and on. I just want to declare that I'm using a frealing List! A List I've already created in code.
So, yeah, I basically need to use a Public Property ComboBoxLines As List(Of String) from a class which isn't the same class as the UserControl itself as the DataSource for a ComboBox.
VS 2008 Form With An Object Bound To A Datasource Closes?
Aug 17, 2010My form closes whenever I insert an object that has a data bound in it. The object I'm trying to insert is a textbox from the data source window (drag n drop). I've checked on the database and that the table has records in it.
View 1 RepliesMonth Calendar Control As Datasource Object For Access 2007 Query Criteria
Mar 26, 2009I am trying to find a way to use a month calendar control as an object data source, such that when end user selects a given date, or a date range (1 week max), it will supply the date range criteria for an access query, and the results will wind up displaying in a data grid view below the month calendar. I am having a really hard time..
how to write the date criteria into the access query for something like this
Install Excel 12 Object Library In The Development Computer Without Installing Excel 2007?
May 12, 2009I am using VS .net 2003 and developing a program that calls Excel. The development computer only has Excel 2003, and the target machine only has Excel 2007. Would it be possible to install Excel 12 Object Library in the development computer without installing Excel 2007?
View 4 RepliesOffice Automation :: Excel File - Set A Reference To The Microsoft Excel 12.0 Object Library
Oct 6, 2009I'm trying to upgrade a VB6 app to VB 2008. I have read the article in the tutors corner about automating Excel from VB but I cannot get it to work. Heres what I have done:
1) set a reference to the Microsoft Excel 12.0 Object Library
2) Added "Imports Excel = Microsoft.Office.Interop.Excel" to the top of the module
3) in a routine I have added: Dim X As New Excel.Application Here's where I get an error: Error 75 'Application' is ambiguous in the namespace 'Microsoft.Office.Interop.Excel'.
Office Automation :: Code Hangs When An Excel File Is Opened To A Excel Workbook Object?
Aug 3, 2009I use the following code snippet
Dim exlapp As New Microsoft.Office.Interop.Excel.Application
Dim xlWorkBook_new As Microsoft.Office.Interop.Excel.Workbook
Dim strOriginal As String
strOriginal = Server.MapPath(Request.ApplicationPath & "/Attachments/") & "abc.xls"
xlWorkBook_new = exlapp.Workbooks.Open(strOriginal)
The code hangs in the last line. It works fine in the development environment. i deployed in windows server 2000 ,where I get this issue. the browser goes half way and throws the below exception after some time
[Code]...
I have set the identity impersonate to true in web config. This should be mostly an access rights issue.I have even provided access rights for the "everyone " user in the excel file and as well for the interop component. Please post ur valuable comments.
'Object Reference Not Set To Instance Of An Object' While Creating Pivot In Excel
Jun 23, 2012I'm trying to create a pivot table by opening an Excel file from my drive.But I'm receiving the error saying "Object reference not set to an instance of an object".[code]
View 1 Replies.net - Handle Null Nested Objects In RDLC Report That Is Bound To Custom Assembly Object Datasource?
Aug 27, 2009I have an RDLC report that I am rendering directly to the Response Stream as PDF (rather than using the ReportViewer). In the code that renders the report, it's DataSource is bound to a List(Of ClassA) objects defined in a custom assembly. This seems to work for the most part. My problem is that I can't seem to handle the situation where a nested object is null. For example, given ClassA and ClassB (the nested object) defined as follows:
Public Class ClassA
Public Id As Integer
Public Name As String
[Code]....
the report displays "#Error" if TheNestedObject is null. If TheNestedObject is not null, it correctly displays the Name.
Turn A Microsoft.Office.Interop.Excel.Chart Object Into A Microsoft.Office.Tools.Excel.Chart Object?
Aug 5, 2010Basically I've coded an Excel 2007 project in VB.NET 2010 that allows you to create charts with a fair amount of interactivity. I want the user to be able to save and reopen this workbook and still have that interactivity in any already-created charts, so they don't have to re-create them.
When I create the charts, I use Sheet1.Controls.AddChart(...), which returns a Microsoft.Office.Tools.Excel.Chart with which I can handle events and such. However, when I reopen the file and look through the Sheet1.Controls collection, there are no Chart objects. Accessing the charts through Sheet1.ChartObjects.Chart gives me Interop Charts, when I need the Tools Charts.
Change Microsoft SQL Server (SqlClient) Datasource To ODBC Datasource?
Jan 30, 2011I use vb.net and windows form and sqlserver
I added Data Source(Microsoft SQL Server (SqlClient)) to my project. and now I need to change it to ODBC Data Source .
Office Automation :: Method Not Found: Void Excel.Range.set_Value(System.Object,System.Object)
Mar 11, 2009following error message:
Method not found: Void Excel.Range.set_Value(System.Object,System.Object)
Unable To Cast Object Of Type X To Type X On Setting DataSource To A Table?
Feb 19, 2012Columns 0 & 1 are filled from a DataAdapter from Access Database and three are added. I had this working, but I changed it to check for the column "Feed" so I could add several Locations. At first this worked,but I did someething in perfecting it and it now fails after filling the first row of the datagridview (dgvFdMed).I ran a check and the table LotsTab has 8 rows filled. Column 1 & 2 are strings and the database appears they are fine. The added columns have just been created with no value. My plan is to enter the values and then use the data from the grid.
Private Sub sfillGrid(ByVal Loc As String)
Dim i As Integer
Dim column As DataGridViewColumn
[code]....
Create A COM Object To Use In Excel?
Jul 21, 2010I am using VB Express 2008, and I am trying to create a COM object to use in Excel. I have looked at the walkthroughs, but it seems they only apply to Visual Studio.
Is there a way to create a COM object in VB Express?
.net - The Proper Way To Dispose Excel Com Object?
Apr 25, 2012I have following code (obtained from online tutorial). The code is working but I suspect the way to dispose the Excel com object is somewhat not proper. Do we need really need to call GC.Collect? Or what is the best way to dispose this Excel com object?
Public Sub t1()
Dim oExcel As New Excel.Application
Dim oBook As Excel.Workbook = oExcel.Workbooks.Open(TextBox2.Text)[code]............
.net - VSTO Excel Object Performance?
May 9, 2011I wrote this little AddIn sample to show you a performance issue and how to avoid it?It is just a parse of an excel workbook and runned in the main excel process (0) and a random thread created by the timer.
Public Class ThisAddIn
Dim a As System.Windows.Threading.Dispatcher = System.Windows.Threading.Dispatcher.CurrentDispatcher()
Dim t As New Threading.Thread(New Threading.ParameterizedThreadStart(AddressOf threadTest))
Dim tm As New System.Timers.Timer(20000)
[code].....
.Net 2008 Express And Excel COM Object?
Apr 1, 2010For some reason I get "Exception from HRESULT: 0x800A01A8" from the following code only if I open the XLS file outside of the application I'm coding while this code is being ran. Can anyone advise as to what might be occurring and how to fix this? Right now when my application launches I just output a messagebox informing the user not to open Excel while the data is being loaded. I'd like to correct this problem.Another thing is that when I open the XLS file externally after my application loads an instance of the file, it doesn't prompt to open it as read-only.
[Code]...
How To Kill Process Excel Object
Aug 18, 2009I have written Code for Excel File Create via ASP.Net with VB Code, I want Kill the process Explictly..I already used GC.Collect(), But it takes more time.
View 4 RepliesMicrosoft Excel 12.0 Object Library?
Feb 16, 2009to have Microsoft Excel 12.0 Object Library when I click on Add Reference... in Visual Studi 2005, do I need to have Excel installed on my PC or is it ok if I gac Microsoft.Office.Interop.Excel.dll
Microsoft Excel 14.0 Object Library
Aug 11, 2010My company is currently in the process of upgrading from Office 2000 to Office 2010. The upgrade won't take place until October, but I am currently testing it on my PC. I have some applications that reference Microsoft Excel 14.0 Object Library VERSION 1.3.0.0 and export DataGridView results to Excel. Since I upgraded my PC to Office 2010, my version of Microsoft Excel 14.0 Object Library was upgraded to 1.7.0.0. Now, Office 2000 users are having issues when trying to export data. They get the following error:"Attempted to read or write protected memory. This is often an indication that other memory is corrupt."I can't debug to find out the issue because I am running Office 2010 and it works perfectly fine for me. Has anyone else encountered this? I think it's happening right around when it starts to save the file.[code]
View 2 RepliesReleasing Excel COM Object Method?
Sep 23, 2011Well, I've searched numerous threads and I'm stumped. Though my VB.net experience is newb status.I'm interacting with Excel Workbooks/worksheets with:
Imports Excel = Microsoft.Office.Interop.Excel
Now I'm fairly adept with getting data from the excel sheet with no problem.But each and every time I quit my widows form, or execute a new command_button click to repeat an operation, in the task manager, excel.exe then opens up a new instance.Releasing the the Excel COM object seems to offer a bit of head scratching.I realize that you can get your form to activate and retrieve data from whatever spreadsheet has been directed to be opened, but I can't seem to put it back and close it correctly.I have read about the Marshal. release object methods and garbage collection with no luck so far.Do I need to import another liberary that completes this operation? I would asssume this would be taken care of as apart of the:
Imports Excel = Microsoft.Office.Interop.Excel
close excel instances opened up by my windows form? Somethig like this:
Dim xlApp As Excel.Application
Dim xlWorkBook As Excel.Workbook
Dim xlWorkSheet As Excel.Worksheet
[code]....
(so that it is no longer looked at as "read only" when the spread sheet is opened up from directly from excel)As A minor work around, I've teminated it from the task Bar with proc.kill() but this does not help because my ultimate goal is to just simply realease the excel sheet when my windows form is finished getting its data.This following code does not seem to work.
releaseObject(xlApp)
releaseObject(xlWorkBook)
releaseObject(xlWorkSheet)
Using Microsoft Excel 14.0 Object Library?
May 3, 2012Using the Office 2010 Object Library to create Excel documents from code. Is there a way to deploy the project without having Office installed on the target machine? I have a 2000 Server that Office 2010 is incompatible with.
View 2 RepliesVB 2010 Express - Using The Excel Object?
Jul 15, 2010I am trying to manipulate an excel 2000 spreadsheet in visual basic 2010 express with the following code but cannot get it to work
Imports Excel = Microsoft.Office.Interop.Excel
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
[code]....
.net - Get Cell Reference From Range Object In Excel?
Aug 1, 2011I have : Dim cell As Excel.Range = sheet.Range("A2") Console.WriteLine("Cell references to = " + ????? ) What should I replace ????? with to get A2 printed in its place?
View 2 RepliesExport Silverlight Datagrid To Excel Using COM Object
May 4, 2012I have a datagrid on a silverlight 4 application that I am trying to export to excel by calling the COM component for Excel in silverlight. It keeps error-ing out and tells me that the functionality is not supported. I can't quite figure out what is wrong and believe my code is solid, obviously not though.[code]
View 1 RepliesGet Data From Excel Worksheet To String Object?
Aug 3, 2009I've tried this[code]...
and it throws me an exception. I'm feeling that I'm doing something wrong with the object access, but this method worked in embedded VB, and do not works in .net.