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c# file with multiple connections
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0. Sign in to vote. Hi,. In my application i am want to open two MS ACCESS Database connections for the same file. Is it possible? Also can i write/read in the same database file using both connections? I am using MS ACCESS 2007 in my application. Thanks, IamHuM. Tuesday, January 18, 2011 10:57 AM. In the following C# example, three new SqlConnection objects are created, but only two connection pools are required to manage them. Note that the first and second connection strings differ by the value assigned for Initial Catalog . +. using (SqlConnection connection = new SqlConnection( "Integrated. Introduction. In this article I will explain how to create a connection string once and then use the connection in multiple forms in Windows applications. In web applications we create a connection string in the web.config file and use this connection in multiple pages but in Windows Forms the web.config file. It would be great if WinSCP offered the option to connect X times to a server, thus allowing multiple files to transfer simultaneously... I am trying to open multiple sessions c# code, via threading. so parallel opening sessions for 10, winscp is throwing access denied even when it is 10 threads, means 10. I am writing a database app for a security application. Basically i want the client app to query the computer that is logged on and write the ComputerName, Date and Time as well as some other things and send it cross network to the server which will host the main .mdb file. but, i know that MDB files normally. Re: Multiple users on one SqlServer mdf file. Are you using VB/C# and ADO.NET? If yes, are you using "User Instance="True"" in your connection string? If yes, don't. User Instance means only a single user can attach to this database. If No to any of the above. Check if the database is in Single User Mode. Hi, I'm writing a simple program that are downloading several files at the same time in different threads and It seems that as soon as the first file is finished all other file downloads ends with this exception: error in thread = 4 filename = movie1.wmv, error = An existing connection was forcibly closed by the. Hi! I want download a large file (http).and it should work like a download manager and do it in multiple connections. I googled this and didn't find useful instruction. may an example can help me. tnx i have this link too but can't use that. How to open multiple connections to download single file? The config file is place where common variables, database connection strings, web page settings and other common stuff are placed. The config file is also dynamic, so you can change the value of the variable in the config file without compiling and deploying the .NET app. In multi tenancy environment. Dear All, I want a connection instance which is written on Web.config file, as I require multiple connection it is not possible to write the complete code on. connectionStrings>Well you can add multiple connection strings inside web.config like:- C# | .Net | Design Patterns | Best Practices | Data Structures &. I can see why common sense dictates that you should open one and use it throughout, but you will run into problems with dropped connections and multithreading. So your next step will be to open a pool, say of 50, connections and keep them all open, doling them out to different processes. And then you'll. will always be the network, so if you download the file in one chunk, you'll get the maximum throughput, introducing multiple threads will actually slowdown the whole process. That depends - some servers may throttle per connection, at which point it may make sense to have multiple connections (although In some situations we need to execute multiple SQL statements with the Command Object, in these types of situations the SqlDataReader returns multiple ResultSets also. Documentation about How to: Connect to Multiple Databases in Data Access Classic. Get the. For the purpose an example will be presented where the scenarion is the following: there are two databases, WorkDB and ArchiveDB.. OpenAccess uses the App.config file of a project to set its database connection details. These settings indicate the connection string to use when connecting to the database, and the query to execute. Although you could enter this information using separate elements, you'd face a few problems. In the configuration file, there wouldn't be any indication that these two settings are related, which. Enumerating Connection Strings In a web application, you can store multiple connection strings. Some of them are used by the system and the others may be application-specific. You can write a very simple ASP.NET application that enumerates all the connection strings stored in the web.config file, as shown in Listing. No additional license keys, though. C#; VB. Smtp mailer = new Smtp(); // Let's enable logging SMTP session into a file so that you can then // examine which commands MailBee.NET sent to the server and how many // connections it has made. mailer.Log.Enabled = true; mailer.Log.Filename = @"C:Templog.txt"; mailer.Log. 20 min - Uploaded by CaptJigglyLink to part 1: http://www.youtube.com/watch?v=cHq2lYLA4XY&feature=plcp. Open(); var sqlConnection = connection as SqlConnection; if (sqlConnection != null) { // Print out which version of SQL Server is used.. Currently, your connection string data is in the element of your *.config file. Application configuration files. AppSettings indexer) is that you can define multiple connection. To connect to a RabbitMQ, it is necessary to instantiate a ConnectionFactory and configure it to use desired hostname, virtual host, and credentials. Then use ConnectionFactory.CreateConnection() to open a connection. The following two code snippets connect to a RabbitMQ node on hostName: ConnectionFactory factory. In the above web.config file, we have two connection strings defined. One is for an Oracle database and another for an MSSQL database. You could have any number of connection strings. Our database factory design uses its own web.config section, defined in DatabaseFactoryConfiguration. This allows. Open(); var sqlConnection = connection as SqlConnection; if (sqlConnection != null) { // Print out which version of SQL Server is used.. Currently, your connection string data is in the element of your *.config file. Application. AppSettings indexer) is that you can define multiple connection strings for a single. I am currently using a C# form to create a WebBrowser to go to the website and login and grab the links for the downloads and then using HttpWebRequest i log back in to get the cookies and to request the file and multi-threading to download the files and then write it to a file with the stream.copyTo in. ConnectionStringsindexer.Oneadvantageofthisapproach(asopposedtousing the element and the ConfigurationManager.AppSettings indexer) is that you can define multiple connection strings for a single application in a consistent manner. To see this in action, update your current App.config file as follows. How. It. Works. A single TCP endpoint (IP address and port) can serve multiple connections. In fact, the operating system takes care of most of the work for you. All you need to do is create. However, the +srv appended to the standard connection string signals the driver to query the DNS for options as a configured TXT record. Only two options are available for configuration via a TXT record – replicaSet and authSource , and only one TXT record is allowed per server. If multiple TXT records appear in the DNS. Trying to Configure the .UDL file for the Correct SQL Server Driver for C# (.NET Generator) When Running on a local machine with Full DB Access Using. I'm guessing there is some driver that is hooking files, webpages, and any internet data as it's coming through where one connection handles a PART of the data and the other connections handle the other parts of the data making a so to speak morphed combined speed of the number of cards/connections. Data in an Excel workbook can come from two different locations. The data may be stored directly in the workbook, or it may be stored in an external data source, such as a text file, a database, or an Online Analytical Processing (OLAP) cube. This external data source is connected to the workbook through a data connection,. MARS allows you to avoid this message by allowing you to open multiple SqlDataReader objects on a single connection. MARS enables an application to.. The above line of code retrieves the connection string from the ConnectionStrings section of the web.config file. The connection string is stored in the. How make concurrent connection to msaccess db in C#. I have msaccess. Well, if there's only one user accessing your program at a time (because msaccess cannot support multiple users at the same time). Then there isn't. but all i wanted to know is that, i have put .mbd file in shared location. Now to 2. Have you ever had to work with your log files once your application left development? If so, you quickly run into a few pain points: There's a lot more data; You have to get access to the data; It's spread across multiple servers; A specific operation may be spread across service boundaries – so even more. The different protocols like the built-in file, TCP and named pipe protocols allow you to log to different destinations. You can have multiple logging connections open at the same time and log to a file and the Console simultaneously. You can customize the behavior of any protocol by specifying additional protocol options in. The server is made, now we need to identify incoming connections and serve the requested files. For each connection, we send only one file and because we might have multiple connections, we'll need an endless loop to handle them one by one. For those that are familiar with Java, C#, etc, think about this as the Golang way of implementing a Worker Thread-Pool utilizing channels instead.... This would avoid multiple connections and millions of files in your S3 bucket, specially when you can get 1 million requests per minute. :) I wrote this dummy. It´s works like ReadWriteLockSlim but for multi process. All this process can be done inside current Locker class. And better of all, its could be optional (by connection string) and user can choice still access via exclusive mode like now (and do not create any lock file). I will made same tests this weekend in a. Retrieving Multiple Columns and Rows. Summary. If you can connect to Oracle using SQL*Plus on the same machine as Visual Studio, then you know that your Oracle client-side software is properly installed and configured. Back to Topic. In the Location field, enter the directory where you want to save the files. (Note: if. The connection string in the web.config now contains deployment-specific configuration data. config"/>. Bad things are that you've got to keep web.config's in sync if there's lots of settings, but you could totally break it apart via "include files.". Can multiple applications or multiple instances of the same application access a single database file at the same time? Is SQLite threadsafe? How do I list all.. Other embedded SQL database engines typically only allow a single process to connect to the database at once. However, client/server database engines (such as. How do I resolve the error "Virtual User Container Error Runtime: 117 - External Function: can not load external function" received when trying to replay WAP scripts after upgrading to SilkPerformer 2007? How do I resolve the error "WebEngine: 13 - The connection closed gentle or timed out, but earlier than expected" when. Upload Files. Uploading files is significantly more complicated than downloading files. For one thing, we have to deal with two streams of data. One for the FTP connection and another for the file we're reading from disk to upload. These are the steps we take to upload a file: Create a FtpWebRequest object. Demonstrates how to SFTP through an intermediate SSH server (multiple hop).. LastErrorText); return; } // Connect through the 1st SSH connection to reach a 2nd SSH server (for SFTP) // Note: Any number of connections may be simultaneously. LastErrorText); return; } // Upload from the local file to the SSH server. This tutorial introduces the concept of using threads to handle multiple clients in a TCP server. A TCP server is created and set to listen to a specific port. When a client is connected, a new thread is created that will handle the client's communication. Unlike using UDP to transfer file, TCP/IP said to be connection oriented; which, both client and server after a setup phase treat some IP packets as being sent along a virtual route,. Again, it is client/server based, so you will need either two computers or to run both the client and server on the same device. Open two connections. Console.WriteLine ("Open two connections."); myConnection1.Open(); myConnection2.Open(); // Now there are two connections in the pool that matches the connection string. // Return the both connections to the pool. Console.WriteLine ("Return both of the connections to the pool."); myConnection1. This is a tutorial to download multiple files from internet using the SSIS Script Task.. We will also show how to send all the files to download using a C# array. Finally, we will use the ADO object enumerator.... In the Execute SQL Task, connect to AdventureWorks2016CTP3 Database. In ResultSet specify. Forms that these two sets of files in the same project are not linked to each other - and the project in fact only uses the XAML-based files, leaving the C# layout files superfluous unless one changes the App.cs. By the way, the XAML layout defining the TabbedPage from the example does it like this: Dean Hume - Working with multiple Web.Config files.. I have different connection strings for each configuration (dev,test,qa,prod) but the different connections don't seem to apply when running IIS locally, regardless of the setting of the Configuration dropdown. Vick - 2/10/2015. This means, we have to. The IBM MQ documentation contains information only on the C#, C++ and Visual Basic languages. This collection of. A .NET client application can use an IBM MQ MQI client configuration file and, if you are using the managed connection type, a .NET application. Multiple specifications of the channel definition can exist. Settings Read from System Properties Setting the Server Bind Address Pluggable File System Split File System Database Upgrade Java Objects Serialization Custom.. If multiple connections concurrently try to update the same row, the database waits until it can apply the change, but at most until the lock timeout expires. The using statement is a C# nicity for dealing with disposable objects.. NET and we use it for everything from database connections to stream writers.... the advice should be one HttpClient instance PER HOST being called, based on the assumption that a socket can't be re-used to call multiple hosts. In this article I will show you how to write one in C#. You can do it in any server-side language, but to keep things simple and more understandable, I chose Microsoft's language. This server conforms to RFC 6455 so it will only handle connections from Chrome version 16, Firefox 11, IE 10 and over. How to work with RabbitMQ in C#. Take advantage of RabbitMQ. When working with RabbitMQ, you should be aware of two terms: [ Also on InfoWorld: 19. Assuming that RabbitMQ server is running locally in your system, the following code snippet can be used to create a connection to RabbitMQ server. C# Coding Standards and Naming Conventions. Below are our C# coding standards, naming conventions, and best practices. Use these in your own projects and/or adjust these to your own needs. The C# code to delete the entire catalog is below. // Declare and assign values to Variables string SSISServerName = ".\SQL2012"; // Creating a connection string sqlConnectionString = "Data Source=" + SSISServerName + ";Initial Catalog="master;Integrated" Security="SSPI;""; SqlConnection sqlConnection. Today's README file explains how to create connection strings to SQL Server databases using Visual Studio's built-in tools. To provide an example using real source, I created a simple Winforms application named ITworld, written in C#. Although my example app is written in C#, the techniques and. Users of their financial platform can download transaction history as a CSV file. This CSV file is built by using the very memory intensive String.Concat function. That and other memory intensive implementations such as loading that much data with using lots of connections will ultimately trigger the Garbage. Redis, StackExchange.Redis, C#, how to connect with Redis programming, Redis for .NET Developer - Connecting with C#, Redis for .NET Developer. Connecting to a bucket is a two-step process: first, a Cluster object needs to be created or the ClusterHelper object needs to be initialized, followed by one or more calls to. As an alternative to programmatic configuration, the SDK also supports configuration via config file and soon will support JSON config files. Here is an. Many types of objects encapsulate some other type of system resource (e.g., a disk file, database connection, network socket, etc.). Leaving these resources. They fall into this trap because C# provides two different ways of doing things, one which can throw an exception, and one which won't. Some will shy away from the.
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