Commit for development environment setup

PROMS/csla20cs-2.1.4-070223/csla20cs/ProjectTracker20cs/ProjectTracker.Library/RoleList.cs

@@ -0,0 +1,88 @@
+using System;
+using System.Data;
+using System.Data.SqlClient;
+using Csla;
+using Csla.Data;
+
+namespace ProjectTracker.Library
+{
+  [Serializable()]
+  public class RoleList : 
+    NameValueListBase<int, string>
+  {
+    #region Business Methods
+
+    public static int DefaultRole()
+    {
+      RoleList list = GetList();
+      if (list.Count > 0)
+        return list.Items[0].Key;
+      else
+        throw new NullReferenceException(
+          "No roles available; default role can not be returned");
+    }
+
+    #endregion
+
+    #region Factory Methods
+
+    private static RoleList _list;
+
+    /// <summary>
+    /// Returns a list of roles.
+    /// </summary>
+    public static RoleList GetList()
+    {
+      if (_list == null)
+        _list = DataPortal.Fetch<RoleList>
+          (new Criteria(typeof(RoleList)));
+      return _list;
+    }
+
+    /// <summary>
+    /// Clears the in-memory RoleList cache
+    /// so the list of roles is reloaded on
+    /// next request.
+    /// </summary>
+    public static void InvalidateCache()
+    {
+      _list = null;
+    }
+
+    private RoleList()
+    { /* require use of factory methods */ }
+
+    #endregion
+
+    #region Data Access
+
+    private void DataPortal_Fetch(Criteria criteria)
+    {
+      this.RaiseListChangedEvents = false;
+      using (SqlConnection cn = new SqlConnection(Database.PTrackerConnection))
+      {
+        cn.Open();
+        using (SqlCommand cm = cn.CreateCommand())
+        {
+          cm.CommandType = CommandType.StoredProcedure;
+          cm.CommandText = "getRoles";
+
+          using (SafeDataReader dr = 
+            new SafeDataReader(cm.ExecuteReader()))
+          {
+            IsReadOnly = false;
+            while (dr.Read())
+            {
+              this.Add(new NameValuePair(
+                dr.GetInt32("id"), dr.GetString("name")));
+            }
+            IsReadOnly = true;
+          }
+        }
+      }
+      this.RaiseListChangedEvents = true;
+    }
+
+    #endregion
+  }
+}