mcs/class/System.Web/System.Web.Configuration_2.0/ProvidersHelper.cs

   1 //
   2 // System.Web.Configuration.ProvidersHelper
   3 //
   4 // Authors:
   5 //      Chris Toshok (toshok@ximian.com)
   6 //
   7 // (C) 2005 Novell, Inc (http://www.novell.com)
   8 //
   9
  10 //
  11 // Permission is hereby granted, free of charge, to any person obtaining
  12 // a copy of this software and associated documentation files (the
  13 // "Software"), to deal in the Software without restriction, including
  14 // without limitation the rights to use, copy, modify, merge, publish,
  15 // distribute, sublicense, and/or sell copies of the Software, and to
  16 // permit persons to whom the Software is furnished to do so, subject to
  17 // the following conditions:
  18 //
  19 // The above copyright notice and this permission notice shall be
  20 // included in all copies or substantial portions of the Software.
  21 //
  22 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  23 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  24 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  25 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  26 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  27 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  28 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  29
  30 #if NET_2_0
  31
  32 using System;
  33 using System.Collections;
  34 using System.Configuration;
  35 using System.Configuration.Provider;
  36 using System.Data.Common;
  37 using System.Data.SqlClient;
  38 using System.IO;
  39 using System.Reflection;
  40 using System.Web;
  41 using System.Web.Compilation;
  42
  43 namespace System.Web.Configuration {
  44
  45         public static class ProvidersHelper
  46         {
  47                 public static ProviderBase InstantiateProvider (ProviderSettings providerSettings, Type providerType)
  48                 {
  49                         Type settingsType = HttpApplication.LoadType (providerSettings.Type);
  50
  51                         if (settingsType == null)
  52                                 settingsType = HttpApplication.LoadTypeFromBin (providerSettings.Type);
  53
  54                         // check App_Code dlls
  55                         if (settingsType == null) {
  56                                 IList appCode = BuildManager.CodeAssemblies;
  57
  58                                 if (appCode != null && appCode.Count > 0) {
  59                                         Assembly asm;
  60                                         foreach (object o in appCode) {
  61                                                 asm = o as Assembly;
  62                                                 if (asm == null)
  63                                                         continue;
  64                                                 settingsType = asm.GetType (providerSettings.Type);
  65                                                 if (settingsType != null)
  66                                                         break;
  67                                         }
  68                                 }
  69                         }
  70
  71                         if (settingsType == null)
  72                                 throw new ConfigurationErrorsException (String.Format ("Could not find type: {0}",
  73                                                                                        providerSettings.Type));
  74                         if (!providerType.IsAssignableFrom (settingsType))
  75                                 throw new ConfigurationErrorsException (String.Format ("Provider '{0}' must subclass from '{1}'",
  76                                                                                        providerSettings.Name, providerType));
  77
  78                         ProviderBase provider = Activator.CreateInstance (settingsType) as ProviderBase;
  79
  80                         provider.Initialize (providerSettings.Name, providerSettings.Parameters);
  81
  82                         return provider;
  83                 }
  84
  85                 public static void InstantiateProviders (ProviderSettingsCollection configProviders, ProviderCollection providers, Type providerType)
  86                 {
  87                         if (!typeof (ProviderBase).IsAssignableFrom (providerType))
  88                                 throw new ConfigurationErrorsException (String.Format ("type '{0}' must subclass from ProviderBase", providerType));
  89
  90                         foreach (ProviderSettings settings in configProviders)
  91                                 providers.Add (InstantiateProvider (settings, providerType));
  92                 }
  93
  94                 internal static DbProviderFactory GetDbProviderFactory (string providerName)
  95                 {
  96                         DbProviderFactory f = null;
  97
  98                         if (providerName != null && providerName != "") {
  99                                 try {
 100                                         f = DbProviderFactories.GetFactory(providerName);
 101                                 }
 102                                 catch (Exception e) { Console.WriteLine (e); /* nada */ }
 103                                 if (f != null)
 104                                         return f;
 105                         }
 106
 107                         return SqlClientFactory.Instance;
 108                 }
 109         }
 110
 111 }
 112
 113 #endif
 114