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POc# class how to reference in .cs file for website
 

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    <p>I'm new in programming. I've followed the steps in the book "Pro asp.net 4 in c#2010" to create 2 classes.</p> <p>Now I try to use this class on a webpage. In the .cs file I added using "DBComponent;" but Visual Studio says "The type or namespace name 'DBComponent' could not be found (are you missing a using directive or an assembly reference?)"</p> <p>What did I forget?</p> <p>If i try to add the compiled dll under 'references' i get the error: The type 'DBComponent.EventDetails' in 'D:_Web\OSWeb\DBComponent\DBComponent\EventDetails.cs' conflicts with the imported type 'DBComponent.EventDetails' in 'D:_Web\OSWeb\DBComponent\DBComponent\bin\Debug\DBComponent.dll'. Using the type defined in 'D:_Web\OSWeb\DBComponent\DBComponent\EventDetails.cs'.</p> <p>This is what I've done:</p> <ol> <li>Create a new empty website 'OSWeb' in VS</li> <li>On top of this solution I clicked right and choosed: Add > new Project > Visual C# > Windows > Class library: name: DBComponent and I stored in D:_Web\OSWeb\DBcomponent</li> <li><p>List item</p> <p>I created 2 cs files (EventDB.cs and EventDetails.cs)</p></li> </ol> <p>my events.cs file</p> <pre><code>using System; using System.Collections.Generic; using System.Configuration; using System.Data; using System.Data.SqlClient; using System.Linq; using System.Text; using System.Threading.Tasks; namespace DBComponent { public class EventDB { private string connStr; public EventDB() {...} public EventDB(string connectionString) {...} public int InsertEvent(EventDetails evd) {...} } } </code></pre> <p>This is my eventdetails.cs file</p> <pre><code>using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; namespace DBComponent { public class EventDetails { private int eventId; private string eventName1; public int EventId { get { return eventId; } set { eventId = value; } } public string EventName1 { get { return eventName1; } set { eventName1 = value; } } public EventDetails(int eventId, string eventName1) { this.eventId = eventId; this.eventName1 = eventName1; } public EventDetails() { } } } </code></pre> <p>Now I create a new webpage (this is the .cs file of this webpage) (events.aspx.cs)</p> <pre><code>using System; using System.Data; using System.Configuration; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; using DBComponent; =&gt; here is the error public partial class events : System.Web.UI.Page { private EventDB db = new EventDB(); =&gt; here is the same error protected void Page_Load(object sender, EventArgs e) { } } </code></pre>
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    1. COIn your website project, have you added a project reference to your class library?
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    2. CORelated http://stackoverflow.com/a/996358/332733, also -1 for not researching how namespaces work first
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