My requirement is to upload excel file to the folder which is on website root and then read this file's data into the datatable.
This is working fine on my existing hosting provider. But now I've uploaded my website on Windows Azure cloud service. After porting to Azure cloud service I'm getting an error on "Microsoft.Jet.OLEDB.4.0" provider.
I have use the “Microsoft.Jet.OLEDB.4.0” provider for read data from the excel file and add data to datatable. It work fine on local too, but when I host my web application on azure cloud service it generate following error
“Microsoft.Jet.OLEDB.4.0 provider is not registered on the local machine”
Please have a look on some line of codes:
string strpath = Server.MapPath(OAppPath);
strpath = strpath + "\\MYDATAFOLDER\\" + System.IO.Path.GetFileName(FileUpload1.PostedFile.FileName);
FileUpload1.PostedFile.SaveAs(strpath);
string excelConnectionString = "";
excelConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;" + "Data Source=" + strpath +
";Extended Properties=\"Excel 8.0;;IMEX=1;HDR=yes\"";
var connection = new OleDbConnection(excelConnectionString);
connection.Open();
var dtSheets = new DataTable();
dtSheets = connection.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
GC.Collect();
GC.WaitForPendingFinalizers();
What is alternate solution of this?
I looked on following too:
Link 1
Link 2
Thanks
Kapil
This is probably caused because your application is running on 64 bits mode. According to Microsoft, The Microsoft OLE DB Provider for Jet and the Microsoft Access ODBC driver are available in 32-bit versions only.
As described in How to get a x64 version of Jet?:
The Microsoft Jet Database Engine 4.0 components entered a state of functional deprecation and sustained engineering, and have not received feature level enhancements since becoming a part of Microsoft Windows in Windows 2000.
One alternative is to use a startup task in your cloud service to deploy the Microsoft Access Database Engine 2010 Redistributable. You'll have to change your connection string to the formats supported by this new driver.
Another approach, which I have used with success, would be to use a library such as ExcelDataReader to read the spreadsheet data.
Related
I have written a code to save all the slides in a presentation as jpeg. It works well in visual studio locally on my system, but when I deploy it on Azure app service, I get 500 internal server error.
IIS received the request; however, an internal error occurred during the processing of the request. The root cause of this error depends on which module handles the request and what was happening in the worker process when this error occurred. IIS was not able to access the web.config file for the Web site or application. This can occur if the NTFS permissions are set incorrectly. IIS was not able to process configuration for the Web site or application. The authenticated user does not have permission to use this DLL. The request is mapped to a managed handler but the .NET Extensibility Feature is not installed.
The code:
using pptd = NetOffice.PowerPointApi;
using NetOffice.PowerPointApi.Enums;
using NetOffice.OfficeApi.Enums;
public void genThumbnails(string originalfileName,string renamedFilename, string dirPath)
{
pptd.Application pptApplication = new pptd.Application();
pptd.Presentation pptPresentation = pptApplication.Presentations.Open(dirPath + renamedFilename, MsoTriState.msoFalse, MsoTriState.msoFalse, MsoTriState.msoFalse);
int i = 0;
foreach (pptd.Slide pptSlide in pptPresentation.Slides)
{
pptSlide.Export(dirPath + originalfileName + "_slide" + i + ".jpg", "jpg", 1280, 720);
i++;
}
pptPresentation.Close();
}
What is the mistake that I am doing? Does NetOffice package also need MS Office installed on the server like Office.Interop?
The standard windows and Linux web apps used blessed operating system images. As part of the PaaS design, customers are limited as to what they can run as there is no MS Office inter-op present and also because Azure Web Apps is a sandbox.
My suggestion would be to create a container image that has the necessary dependencies that you need and then deploy your custom container to an Azure Web App Container.
Trying to run SQL Server CE on an Azure website, but I am getting error:
Unable to load the native components of SQL Server Compact corresponding to the ADO.NET provider of version 8876. Install the correct version of SQL Server Compact. Refer to KB article 974247 for more details
You cannot use SQL Server CE on Azure Web Sites. Using Azure Web Sites you have to use external database - such as Azure SQL Database or MySQL.
Generally speaking for the cloud and any cloud service (IaaS, PaaS, SaaS), you shall never rely on local file system, but rather persist your files on a durable storage such as Azure Blob Storage. Thus you can't (shall not) use services like SQL Server CE.
This seems to work:
Reference System.Data.SqlServerCe 4.0, set "Copy Local" = true.
Azure runs as a an x86 process (not Amd):
Environment.GetEnvironmentVariable("PROCESSOR_ARCHITECTURE");
On dev machine find SQLServerCE dependencies:
C:\ProgramFiles\Microsoft SQL Server Compact Edition\v4.0\Private\x86
Create SqlServerCE\x86 folder in web project.
Copy x86 files into new x86 folder:
sqlceca40.dll
sqlcecompact40.dll
sqlceer40EN.dll
sqlceme40.dll
sqlceqp40.dll
sqlcese40.dll
Add this block to top of application_start in global.asax
string dest = AppDomain.CurrentDomain.SetupInformation.PrivateBinPath;
string src = AppDomain.CurrentDomain.SetupInformation.ApplicationBase + "SqlServerCE\\x86";
foreach (var file in Directory.GetFiles(src))
{
var fileinfo = new FileInfo(file);
string destpath = Path.Combine(dest, fileinfo.Name);
if (!File.Exists(destpath))
{
fileinfo.CopyTo(destpath);
}
}
Note: I am not happy with this solution but I can't figure out how to get the files into the bin folder on deployment. post build events don't seem to work. If anyone has a better solution please suggest it.
I am building an asp.net webforms site that can connect to our tfs hosted on Microsoft (http://companyname.visualstudio.com) and get data from it. When I run the project with Cassini it runs fine as it gets the authentication from the browser. But I want to do this from code behind.
I have tried various setups like
var tfs = new TfsTeamProjectCollection(CollectionUri, new UICredentialsProvider());
[which is now deprecated as method and should not be used]
or
var tfs = TfsTeamProjectCollectionFactory.GetTeamProjectCollection(CollectionUri);
or even with
var tfs = new TfsTeamProjectCollection(CollectionUri, new NetworkCredential("windowsliveid","password"));
I have no domain since it is a Windows Liveid
and then
tfs.EnsureAuthenticated();
Also I get the uri through
var CollectionUri = new Uri("https://companyname.visualstudio.com/DefaultCollection/");
Any ideas on how to properly authenticate. I would love to either prompt the auth window or give username and password directly.
------------------------------ SOLVED !!! ---------------------------------
Here is the solution to it after some googling following Martin Woodward's very helpful suggestion.
First alternate credentials have to be activated through the TFS account. Then the code can be changed into this which works fine :)
Just remember that you need to have the latest version of VS 2012 (at least update1) for the code to work. Else you can't reference BasicAuthCredential.
var nc = new NetworkCredential("username", "password");
var bc = new BasicAuthCredential(nc);
var tfsc = new TfsClientCredentials(bc) {AllowInteractive = false};
var tfs = new TfsTeamProjectCollection(CollectionUri, tfsc);
tfs.Authenticate();
And here are the referenced dlls.
using Microsoft.TeamFoundation.Build.Client;
using Microsoft.TeamFoundation.Client;
using Microsoft.TeamFoundation.VersionControl.Client;
using Microsoft.TeamFoundation.WorkItemTracking.Client;
Take a look at service credentials, or try enabling alternate credentials on your account which will then allow you to authenticate using http basic auth.
You probably want service credentials for what it sounds like you are doing though.
i am developing windows8 application using HTML5 and Javascript. I am using SQLite3-WinRT database plugin, provided by GIT HUB https://github.com/doo/SQLite3-WinRT.
I have successfully integrated the plugin within my app and its working like charm, now the problem is I want to change the database path from
var dbPath = Windows.Storage.ApplicationData.current.localFolder.path + '\\database.sqlite';
to
var dbPath = \pages\js\ + '\\database.sqlite';
Well that path would be Windows.ApplicationModel.Package.current.installedLocation.path + "\\pages\\js\\database.sqlite"
You should however be aware that you cannot write into this location, just use it as a read-only database.
Have a look at the ATTACH command if you want to read data from a provisioned database in addition to having a read-write database.
I have an application that runs at several client sites. I have to support different DBMS at the locations (SQL Server, DB2, Oracle). I am converting the application from VC++ 6.0 with an ODBC based data layer to Visual Studio 2012 and would like to use Entity Framework (database first). I am having troubles changing the database provider at runtime in my sample application. I changed the connect string in the app.config from a SQL Server to DB2 connect string and changed the default connection factory. Now when I run the program I can connect to the database (at least there is no error) but when I iterate over the linq results I get the exception:
Unable to cast object of type 'IBM.Data.DB2.DB2Connection' to type 'System.Data.SqlClient.SqlConnection'
Here is the program code:
private void btnList_Click(object sender, EventArgs e)
{
using (var ListBill = new LB402_TestEntities())
{
var queryGroups = from Groups in ListBill.LB_Group
select Groups.GroupName;
foreach (string name in queryGroups)
{
lbGroups.Items.Add(name);
}
}
}
The modifed portions of the app.config are:
<defaultConnectionFactory type="IBM.Data.DB2.Entity.DB2ConnectionFactory, EntityFramework" />
<add name="LB402_TestEntities" connectionString="metadata=res://*/LB402.csdl|res://*/LB402.ssdl|res://*/LB402.msl;provider=IBM.Data.DB2;provider connection string="Server=db210:50000;Database=LISTBILL;uid=uuuuu;pwd=ppppp;"" providerName="System.Data.EntityClient" />
From my searching and reading it seems like I should be able to do this, but I am obviously missing something.
Changing connection string is not enough. EDMX file consist of three part and one is provider specific (that is the .ssdl reference from connection string). You need to have this part for every database you need to support and you need to have EF provider for every such database. The problem is that EDMX designer does not support modelling for multiple providers. So you must either have separate EDMX for every database = huge duplicity or you must start maintaining SSDL files for other databases manually (it is XML).
You should make some small Proof-of-concept with code first mapping and DbContext API because it doesn't have these obstacles - SSDL is generated at runtime from code mapping and provider specified in connection string.