Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / xsp / System / Web / Configuration / ProvidersHelper.cs / 2 / ProvidersHelper.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Web.Configuration { using System.Configuration; using System.Configuration.Provider; using System.Web.Compilation; using System.Collections.Specialized; using System; using System.Security; using System.Security.Permissions; [AspNetHostingPermission(SecurityAction.LinkDemand, Level=AspNetHostingPermissionLevel.Minimal)] public static class ProvidersHelper { /////////////////////////////////////////////////////////////////////////////// /////////////////////////////////////////////////////////////////////////////// [AspNetHostingPermission(SecurityAction.Demand, Level = AspNetHostingPermissionLevel.Low)] public static ProviderBase InstantiateProvider(ProviderSettings providerSettings, Type providerType) { ProviderBase provider = null; try { string pnType = (providerSettings.Type == null) ? null : providerSettings.Type.Trim(); if (string.IsNullOrEmpty(pnType)) throw new ArgumentException(SR.GetString(SR.Provider_no_type_name)); Type t = ConfigUtil.GetType(pnType, "type", providerSettings, true, true); if (!providerType.IsAssignableFrom(t)) throw new ArgumentException(SR.GetString(SR.Provider_must_implement_type, providerType.ToString())); provider = (ProviderBase)HttpRuntime.CreatePublicInstance(t); // Because providers modify the parameters collection (i.e. delete stuff), pass in a clone of the collection NameValueCollection pars = providerSettings.Parameters; NameValueCollection cloneParams = new NameValueCollection(pars.Count, StringComparer.Ordinal); foreach (string key in pars) cloneParams[key] = pars[key]; provider.Initialize(providerSettings.Name, cloneParams); } catch (Exception e) { if (e is ConfigurationException) throw; throw new ConfigurationErrorsException(e.Message, providerSettings.ElementInformation.Properties["type"].Source, providerSettings.ElementInformation.Properties["type"].LineNumber); } return provider; } [AspNetHostingPermission(SecurityAction.Demand, Level = AspNetHostingPermissionLevel.Low)] public static void InstantiateProviders(ProviderSettingsCollection configProviders, ProviderCollection providers, Type providerType) { foreach (ProviderSettings ps in configProviders) { providers.Add(InstantiateProvider(ps, providerType)); } } } }
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