66 lines
2.6 KiB
C#
66 lines
2.6 KiB
C#
//------------------------------------------------------------------------------
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// <copyright file="OdbcConnectionString.cs" company="Microsoft">
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// Copyright (c) Microsoft Corporation. All rights reserved.
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// </copyright>
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// <owner current="true" primary="true">[....]</owner>
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// <owner current="true" primary="false">[....]</owner>
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//------------------------------------------------------------------------------
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namespace System.Data.Odbc {
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using System;
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using System.Collections;
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using System.Data;
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using System.Data.Common;
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using System.Security;
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using System.Security.Permissions;
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using System.Text;
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internal sealed class OdbcConnectionString : DbConnectionOptions {
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// instances of this class are intended to be immutable, i.e readonly
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// used by pooling classes so it is much easier to verify correctness
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// when not worried about the class being modified during execution
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private static class KEY {
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internal const string SaveFile = "savefile";
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}
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private readonly string _expandedConnectionString;
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internal OdbcConnectionString(string connectionString, bool validate) : base(connectionString, null, true) {
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if (!validate) {
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string filename = null;
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int position = 0;
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_expandedConnectionString = ExpandDataDirectories(ref filename, ref position);
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}
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if (validate || (null == _expandedConnectionString)) {
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// do not check string length if it was expanded because the final result may be shorter than the original
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if ((null != connectionString) && (ODBC32.MAX_CONNECTION_STRING_LENGTH < connectionString.Length)) { // MDAC 83536
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throw ODBC.ConnectionStringTooLong();
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}
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}
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}
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protected internal override System.Security.PermissionSet CreatePermissionSet() {
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System.Security.PermissionSet permissionSet;
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if (ContainsKey(KEY.SaveFile)) {
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permissionSet = new NamedPermissionSet("FullTrust");
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}
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else {
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permissionSet = new System.Security.PermissionSet(System.Security.Permissions.PermissionState.None);
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permissionSet.AddPermission(new OdbcPermission(this));
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}
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return permissionSet;
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}
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protected internal override string Expand() {
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if (null != _expandedConnectionString) {
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return _expandedConnectionString;
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}
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else {
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return base.Expand();
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}
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}
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}
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}
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