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POOleDbConnection - ExecuteNonQuery requires an open and available Connection. The connection's current state is closed
 

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    <p>What am I doing wrong here? </p> <pre><code>using System.Data; using System.Data.OleDb; namespace myProject.Account { public class DbManager { private OleDbConnection OpenDbConnection() { string connectionString = GetConnectionString(); return new OleDbConnection {ConnectionString = connectionString}; } private string GetConnectionString() { return "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\\myDataBase.accdb"; } public void InsertUser(string name, string loginName, string password) { OleDbConnection conn = OpenDbConnection(); OleDbCommand command = new OleDbCommand( "INSERT INTO tblUser (UserName, LoginName, Password) VALUES (@name,@login,@pwd)", Conn); command.Parameters.Add("@name", OleDbType.VarChar).Value = name; command.Parameters.Add("@login", OleDbType.VarChar).Value = loginName; command.Parameters.Add("@pwd", OleDbType.VarChar).Value = password; command.ExecuteNonQuery(); } } } </code></pre> <p>.</p> <p>I got this error:</p> <blockquote> <p>ExecuteNonQuery requires an open and available Connection. The connection's current state is closed.<br> Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.</p> <p>Exception Details: System.InvalidOperationException: ExecuteNonQuery requires an open and available Connection. The connection's current state is closed.</p> <p>Source Error:</p> <p>Line 31: command.ExecuteNonQuery();</p> </blockquote> <p>I have tried to look at some other threads but none have helped:</p> <p><a href="https://stackoverflow.com/questions/3548056/executenonquery-requires-an-open-and-available-connection-the-connections-curr">ExecuteNonQuery requires an open and available Connection. The connection&#39;s current state is closed</a></p> <p><a href="https://stackoverflow.com/questions/5211068/ms-access-db-doesnt-save-changes-after-execution-c">MS Access DB doesnt save changes after execution (C#)</a></p>
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    1. COI recommend placing the connection inside a `using` block to free resources.
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    2. COSeems very "dangerous" to me to call a method `OpenDbConnection` when it really only creates the db connection, but **doesn't** actually **open** it! Kind goes against the "Principle of least surprise" .... either actually **open** the connection in that method, or call it `CreateDbConnection` or something....
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    3. COThanks Uwe Keim - I'm pretty new in C# For others that are interested in why using "using" see thread: http://stackoverflow.com/questions/75401/uses-of-using-in-c-sharp
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