95 lines
4.7 KiB
C#
95 lines
4.7 KiB
C#
//------------------------------------------------------------------------------
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// <copyright file="ProvidersHelper.cs" company="Microsoft">
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// Copyright (c) Microsoft Corporation. All rights reserved.
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// </copyright>
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//------------------------------------------------------------------------------
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namespace System.Web.Configuration
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{
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using System.Configuration;
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using System.Configuration.Provider;
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using System.Web.Compilation;
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using System.Collections.Specialized;
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using System;
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using System.Security;
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using System.Security.Permissions;
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public static class ProvidersHelper {
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///////////////////////////////////////////////////////////////////////////////
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///////////////////////////////////////////////////////////////////////////////
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[AspNetHostingPermission(SecurityAction.Demand, Level = AspNetHostingPermissionLevel.Low)]
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public static ProviderBase InstantiateProvider(ProviderSettings providerSettings, Type providerType)
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{
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ProviderBase provider = null;
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try {
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string pnType = (providerSettings.Type == null) ? null : providerSettings.Type.Trim();
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if (string.IsNullOrEmpty(pnType))
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throw new ArgumentException(SR.GetString(SR.Provider_no_type_name));
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Type t = ConfigUtil.GetType(pnType, "type", providerSettings, true, true);
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if (!providerType.IsAssignableFrom(t))
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throw new ArgumentException(SR.GetString(SR.Provider_must_implement_type, providerType.ToString()));
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provider = (ProviderBase)HttpRuntime.CreatePublicInstance(t);
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// Because providers modify the parameters collection (i.e. delete stuff), pass in a clone of the collection
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NameValueCollection pars = providerSettings.Parameters;
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NameValueCollection cloneParams = new NameValueCollection(pars.Count, StringComparer.Ordinal);
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foreach (string key in pars)
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cloneParams[key] = pars[key];
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provider.Initialize(providerSettings.Name, cloneParams);
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} catch (Exception e) {
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if (e is ConfigurationException)
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throw;
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throw new ConfigurationErrorsException(e.Message, e, providerSettings.ElementInformation.Properties["type"].Source, providerSettings.ElementInformation.Properties["type"].LineNumber);
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}
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return provider;
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}
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[AspNetHostingPermission(SecurityAction.Demand, Level = AspNetHostingPermissionLevel.Low)]
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internal static ProviderBase InstantiateProvider(NameValueCollection providerSettings, Type providerType) {
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ProviderBase provider = null;
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try {
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string pnName = GetAndRemoveStringValue(providerSettings, "name");
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string pnType = GetAndRemoveStringValue(providerSettings, "type");
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if (string.IsNullOrEmpty(pnType))
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throw new ArgumentException(SR.GetString(SR.Provider_no_type_name));
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Type t = ConfigUtil.GetType(pnType, "type", null, null, true, true);
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if (!providerType.IsAssignableFrom(t))
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throw new ArgumentException(SR.GetString(SR.Provider_must_implement_type, providerType.ToString()));
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provider = (ProviderBase)HttpRuntime.CreatePublicInstance(t);
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// Because providers modify the parameters collection (i.e. delete stuff), pass in a clone of the collection
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NameValueCollection cloneParams = new NameValueCollection(providerSettings.Count, StringComparer.Ordinal);
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foreach (string key in providerSettings)
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cloneParams[key] = providerSettings[key];
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provider.Initialize(pnName, cloneParams);
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}
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catch (Exception e) {
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if (e is ConfigurationException)
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throw;
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throw new ConfigurationErrorsException(e.Message, e);
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}
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return provider;
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}
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[AspNetHostingPermission(SecurityAction.Demand, Level = AspNetHostingPermissionLevel.Low)]
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public static void InstantiateProviders(ProviderSettingsCollection configProviders, ProviderCollection providers, Type providerType)
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{
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foreach (ProviderSettings ps in configProviders) {
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providers.Add(InstantiateProvider(ps, providerType));
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}
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}
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private static string GetAndRemoveStringValue(NameValueCollection collection, string key) {
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string strValue = collection[key] as string;
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if (!string.IsNullOrEmpty(strValue))
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strValue = strValue.Trim();
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collection.Remove(key);
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return strValue;
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}
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}
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}
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