C# - How To Establish Two Way Communication Between A Web Server And A Site Server
Dec 16, 2010
I am planning a SaaS system, to be written in C#, ASP.NET using WCF that has two separate components:
On a static IP web server in the cloud will be a web app, common to all clients. Inside each client's office will be another app, installed on a server with IIS.
The site app will obviously be able to connect to the web services published on the web site. But here's the rub - I also want the web app to be able to initiate a connection to the site app... and the on-site server may not necessarily have a static IP. I can't control this, because we may have hundreds of clients at some point in the future, and we cannot limit our saleability by insisting that the customer has a server with fixed IP.
So, how to do this?
I could have the site apps "checking in" with the web every minute or so, to give the web app the possibility of responding with a "while you're here, do x,y,z..." but that seems very inelegant. Also, if we're talking about hundreds of clients, I don't want to be bombarding my web server with all these "hi there!" messages if they're not actually required.
I thought I ask the more exprienced Silverlight users about what they think is the best way to embed Silverlight user controls into an ASP.NET page - in special regards to stablish an easy way of communication between the conrols.
I have heard about services, query strings, etc. but I'd like to find out what has worked for you the best so far...
I have a .net web app hosting in IIS6 with Windows Authentication and anonymous access disabled. The web app is making connection to a SQL Server that is in the same domain, but on a different machine.
I want to have the IIS Worker process acount I_USR_... to be granted access to the SQL Server.
Will this work ?
(Is there a one to one trust ? Or should I make some extra effort to make the trust work ?)
(edit) On this page I read:
IUSR_ must be in the domain, and given proper access to the SQL Server; or, you must disable anonymous access on the site / application - which will allow IIS to pass the users' credentials to SQL Server. Not doing either of these things will result in an error.
I have a web service with several web methods, each web method requires client machine to send their MAC Address and the server will validate this client base on this information (if not valid then return error) before proceeding to further operations. The communication between client and server is HTTPS. I only have about 20 clients or so. The question is is my way of doing this right/secure or not? If not then is there any simple way to do this?
I using System.Transactions on webservices hosted on different domains.Transaction on same domain works fine.But problem is with the distributed/different domains.
I ve tested with the dtctester and the output is as follows...
Initializing DTC Beginning DTC Transaction Enlisting Connection in Transaction Error: SQLSTATE=25S12,Native error=-2147168242,msg='[Microsoft][ODBC SQL Server Driver] Distributed transaction error' Error: SQLSTATE=24000,Native error=0,msg=[Microsoft][ODBC SQL Server Driver]Invalid cur sor state Typical Errors in DTC Output When a. Firewall Has Ports Closed -OR- b. Bad WINS/DNS entries -OR- c. Misconfigured network -OR- d. Misconfigured SQL Server machine that has multiple netcards. Aborting DTC Transaction Releasing DTC Interface Pointers Successfully Released pTransaction Pointer.
We're having an error similar to the one detailed here. We get the error noted above when trying to do AD authentication from our .net (3.5) mvc 2 app. This is our first .net mvc app ...
http://forums.asp.net/t/1161047.aspx
- We are re-using a forms auth library written for a .Net 2 app
- that library/app/config used a service account with min. privileges for binding to AD
- This error occurs in VS 2008, have not tried deploying the app to a server yet (a little early for that)
- like the other user at the previously referenced thread, I can get the 'unable to establish ...' error to go away and display the log on page by putting *MY* credentials in instead of the service account (but not successfully authenticate)
- moving the service account into the same AD OU as my account does not seem to change it ... only using my account credentials does.
- trust level is set to full
Is this some odd permissions trick that is new with .Net 3.5 (even though the ADmembershipProvider is still a 2.0 libary)? This should have nothing to do with MVC itself.
Config looks like this (very standard, like every one else's)
[Code]....
The line/portion highlighted in the debug/stacktrace is:
I am building a website, within a large intranet, that wraps and adds functionality to another site within the same intranet. I do not have access to the other site's source and they do not provide any api's for the functionality they provide. I need to, somehow, have my server-side code go to that site, fill in some forms, then press a submit button. Is this possible? If so, how can I accomplish this?
Note: I am working in asp.NET if that matters at all.
I have a question with this tool. I have a database listed in the App_folder, and the database has a connection in Server explorer. The connection string is listed in the web.config file, and I am able to add users and roles with the Web Admin Tool. However,when in the Web Admin Tool, under Configuration tab, I receive an error when I click on the "test" button. The error reads " Could not establish a connection to the database.If you have not yet created the SQL Server database, exit the Web Site Administration tool, use the aspnet_regsql command-line utility to create and configure the database, and then return to this tool to set the provider."
While updating table Un handled exception was raised (asp.net with c# and SQLServer 2005)
Error Message: "Transaction (Process ID 91) was deadlocked on lock | communication buffer resources with another process and has been chosen as the deadlock victim. Rerun the transaction."
I am using sqlserver express 2008 (Microsoft Web Platform Installer) and visual studio 10 professionnel.
I am also using last Silverlight4_Tools.exe.
When i enter in Web Site Administration Tool / security I obtain this error
There is a problem with your selected data store. This can be caused by an invalid server name or credentials, or by insufficient permission. It can also be caused by the role manager feature not being enabled. Click the button below to be redirected to a page where you can choose a new data store.
The following message may in diagnosing the problem:
Failed to generate a user instance of SQL Server due to a failure in starting the process for the user instance. The connection will be closed.
When I try userprovider
Could not establish a connection to the database.
If you have not yet created the SQL Server database, exit the Web Site Administration tool, use the aspnet_regsql command-line utility to create and configure the database, and then return to this tool to set the provider.
I have created my site using ASP.NET Personal Starter Kits 3.5. I use Visual Studio 2008 only . .with its built-in SQL Server (2005 Express) ... my database in App_Data is ASPNETDB.MDF ...
I have created some of my tables also ....in ASPNETDB ..
In my local PC the site was running fine ...
But when I publish my site on production server it doesn't work and shows the following error
Notes: The current error page you are seeing can be replaced by a custom error page by modifying the "defaultRedirect" attribute of the application's configuration tag to point to a custom error page URL.
My hosting provider gave me the connection string to connect to the SQL Server 2005 but it doesn't work...
I don't understand why my site was running fine using the production SQL Server 2005 in my local PC when I include ASPNETDB.MDF file in App_Data in my local pc only ..if I remove file ASPNETDB.MDF from App_Data of my local pc ... the site stops working ...
Can anybody tell em how to fix this ... !! I am very tensed since last 3-4 days
I have deployed my site in Win 2003 server. In this, it copies file from Another server and copies it in local. It is working with my local computer, but not in the server i have deployed. I hope access credentials may be the first reason. But are there any other reasons for this.
If I just have ADProvider1 it works, when I add ADProvider2, even though for testing I only use ADProvider1 I get an error: "Unable to establish secure connection with the server" Am I adding the second provider to the membership section incorrectly?
I have a requirement where I have to transfer a user from Web Site 1 on Server A to web Site 2 on Server B.
On Web Site 1, I have to provide controls to enter user id and password and which have to be validated on Web Site 2 on server B, after validating them I have to redirect the user to Web site 2.
what is best way fo doing it. code examples are greatly appreciated.
Note: On Web Site 2, user login functionality is already existing and it is provided by ASP.Net login control, am not sure how to handle the user login process from two different places.
or is it the best way to move Web Site 2 from Server B to Server A so that, the same login controls will be shown using Iframe on Web Site A.
i am facing very unique problem.i have one site ,i am hosting it on two different server.but on one server look and feel of html,css proper while on another server html ,css ,menu,javascript not working properly...html and css get distorted..i am not able to find wht reason behind this..
I've created a site using Visual Web Developer 2008 Express Edition (ASP.NET 3.5) but the server hosting it runs ASP.NET 2.0. I'm getting some odd errors running the live site. Is there anything I need to be aware of? Do I need to make any changes to the web.config file (that was generated in VWD) or anything else?
i'm trying to do something weird. I have two sites, one that allows me to handle some information and administrate it (site 1). I have another site that is for querying information only (site 2). I need to upload files in site 1, but i need to save it in site 2, to leave it available to download in site 2.
I'm new to asp.net and SQL Server and I'm trying to research and implement a good way to authenticate a user using those technologies. Would you have any advice as to best approach this? I've read some of hashing but I couldn't find a good tutorial or website describing the best way to approach that
i wanna to show a message box but i prefer to be server side ,i wanna to have full control over it,i mean the number of buttons, the icon etc like windows application.the problem when add reference to system windows.forms and use it , when publish the site on the server i have an error , i can't remember exactly , but when remove all my messages every thing becomes ok.this problem appears even with summary validation when i wanna to be shown as a message box rather than list.
I created a database in my local sql server, and ran aspnet_regsql.exe on it, which created all the user and membership tables. However, when I click on the "Asp.Net Configuration" button in VS (2010), it open the Asp.Net Web Site Administration Tool, but with an error that say "An error was encountered. Please return to the previous page and try again." (of course there's no "previous page". What is one to do here? My solution consist of several class libraries (domain, contracts, services, etc, etc) and a Asp.net MVC project. In my web (mvc) project's web.config, my connectionstrings looks as follows (just guessing this matters):
I am trying to host a site on my local system and also tried it on my university server but am finding a great difficulty hosting the site. The site is made in ASP.NET C# and also have silverlight application in it. I am not able to configure or wither host the site on the server. I am having IIS 7 and Windows 7 as the OS. I have enabled IIS 7 on it. (I am using the SQL Server 2005 Express Edition and have almost no knowledge on hosting on IIS 7)
I have to add some ajax to a site, and i can see that in the master page they are using traditional tag <form id="form1" action="ExternalSite.com?a=b" name="test">and I get a tag incorrectly formed when I add a runat="server" within the form tag - but without it I can't have a valid scriptmanager?
