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<h1><a name="kanchor60"></a>Client-Server</h1>
<p>db4o's is an embedded database which usually runs in process. Nevertheless db4o also supports a client server setup. There's no ready to use db4o server, instead you embedded the db4o server in a regular application. This gives you full how you want to run the db4o server.</p>
<p>In order to use the db4o client server mode you need to include the <span>Db4objects.Db4o.CS.dll-assembly </span>in your project. <a href="dependency_overview.htm" target="" title="" alt="" class="MCXref" xrefformat="See "{paratext}"">See "Dependency Overview"</a></p>
<h2>Start The Server</h2>
<p>You start the server by creating a object server instance with the client server factory. Pass the database file path and the port to the factory. After that you need to specify a user-name and password which clients can use to login to this server. You can add multiple users by calling the grant access method multiple times.</p>
<div class="codesnippet" MadCap:conditions="Primary.c#">
<pre class="prettyprint" xml:space="preserve">using (IObjectServer server = Db4oClientServer.OpenServer("database.db4o", 8080))
{
server.GrantAccess("user", "password");
// Let the server run.
LetServerRun();
}</pre>
<div class="codesnippet-meta">ServerExample.cs: Start a db4o server
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<div class="codesnippet" MadCap:conditions="Primary.VB.NET">
<pre class="prettyprint lang-vb" MadCap:conditions="Primary.Online" xml:space="preserve">Using server As IObjectServer = Db4oClientServer.OpenServer("database.db4o", 8080)
server.GrantAccess("user", "password")
' Let the server run.
LetServerRun()
End Using</pre>
<div class="codesnippet-meta">ServerExample.vb: Start a db4o server
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<h2>Connect To The Server</h2>
<p>After the server is up an running you can connect to it. Pass the URL, port, user name and password to the client server factory. This will return a client object container. After that the container is ready to use.</p>
<div class="codesnippet" MadCap:conditions="Primary.c#">
<pre class="prettyprint" xml:space="preserve">using (IObjectContainer container
= Db4oClientServer.OpenClient("localhost", 8080, "user", "password"))
{
// Your operations
}</pre>
<div class="codesnippet-meta">Db4oClientExample.cs: Connect to the server
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<div class="codesnippet" MadCap:conditions="Primary.VB.NET">
<pre class="prettyprint lang-vb" MadCap:conditions="Primary.Online" xml:space="preserve">' Your operations
Using container As IObjectContainer = Db4oClientServer.OpenClient("localhost", 8080, "user", "password")
End Using</pre>
<div class="codesnippet-meta">Db4oClientExample.vb: Connect to the server
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