109 lines
3.6 KiB
C#
109 lines
3.6 KiB
C#
//
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// System.Web.Compilation.ConnectionStringsExpressionBuilder
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//
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// Authors:
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// Chris Toshok (toshok@ximian.com)
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//
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// (C) 2006 Novell, Inc (http://www.novell.com)
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//
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using System;
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using System.CodeDom;
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using System.Configuration;
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using System.Web.Configuration;
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using System.Web.UI;
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namespace System.Web.Compilation {
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[ExpressionEditor("System.Web.UI.Design.ConnectionStringsExpressionEditor, " + Consts.AssemblySystem_Design)]
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[ExpressionPrefix("ConnectionStrings")]
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public class ConnectionStringsExpressionBuilder : ExpressionBuilder {
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public override object EvaluateExpression (object target, BoundPropertyEntry entry,
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object parsedData, ExpressionBuilderContext context)
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{
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return GetConnectionString (entry.Expression.Trim());
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}
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public override CodeExpression GetCodeExpression (BoundPropertyEntry entry, object parsedData,
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ExpressionBuilderContext context)
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{
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Pair connString = parsedData as Pair;
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return new CodeMethodInvokeExpression (
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new CodeTypeReferenceExpression (typeof (ConnectionStringsExpressionBuilder)),
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(bool)connString.Second ? "GetConnectionStringProviderName" : "GetConnectionString",
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new CodeExpression [] {new CodePrimitiveExpression (connString.First)}
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);
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}
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public static string GetConnectionString (string connectionStringName)
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{
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ConnectionStringSettings conn = WebConfigurationManager.ConnectionStrings [connectionStringName];
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if (conn == null)
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return String.Empty;
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else
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return conn.ConnectionString;
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}
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public static string GetConnectionStringProviderName (string connectionStringName)
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{
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ConnectionStringSettings conn = WebConfigurationManager.ConnectionStrings [connectionStringName];
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if (conn == null)
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return String.Empty;
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else
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return conn.ProviderName;
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}
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public override object ParseExpression (string expression, Type propertyType, ExpressionBuilderContext context)
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{
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bool wantsProviderName = false;
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string connStringName = String.Empty;
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if (!String.IsNullOrEmpty (expression)) {
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int subidx = expression.Length;
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if (expression.EndsWith (".providername", StringComparison.InvariantCultureIgnoreCase)) {
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wantsProviderName = true;
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subidx -= 13;
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} else if (expression.EndsWith (".connectionstring", StringComparison.InvariantCultureIgnoreCase))
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subidx -= 17;
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connStringName = expression.Substring (0, subidx);
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}
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return new Pair (connStringName, wantsProviderName);
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}
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public override bool SupportsEvaluate {
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get { return true; }
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}
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}
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}
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