OdbcConnectionString.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / Data / System / Data / Odbc / OdbcConnectionString.cs / 1305376 / OdbcConnectionString.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// [....] 
// [....]
//----------------------------------------------------------------------------- 
 
namespace System.Data.Odbc {
 
    using System;
    using System.Collections;
    using System.Data;
    using System.Data.Common; 
    using System.Security;
    using System.Security.Permissions; 
    using System.Text; 

    internal sealed class OdbcConnectionString : DbConnectionOptions { 
        // instances of this class are intended to be immutable, i.e readonly
        // used by pooling classes so it is much easier to verify correctness
        // when not worried about the class being modified during execution
 
        private static class KEY {
            internal const string SaveFile                  = "savefile"; 
        } 

        private readonly string _expandedConnectionString; 

        internal OdbcConnectionString(string connectionString, bool validate) : base(connectionString, null, true) {
            if (!validate) {
                string filename = null; 
                int position = 0;
                _expandedConnectionString = ExpandDataDirectories(ref filename, ref position); 
            } 
            if (validate || (null == _expandedConnectionString)) {
                // do not check string length if it was expanded because the final result may be shorter than the original 
                if ((null != connectionString) && (ODBC32.MAX_CONNECTION_STRING_LENGTH < connectionString.Length)) { // MDAC 83536
                    throw ODBC.ConnectionStringTooLong();
                }
            } 
        }
 
        protected internal override System.Security.PermissionSet CreatePermissionSet() { 
            System.Security.PermissionSet permissionSet;
            if (ContainsKey(KEY.SaveFile)) { 
                permissionSet = new NamedPermissionSet("FullTrust");
            }
            else {
                permissionSet = new System.Security.PermissionSet(System.Security.Permissions.PermissionState.None); 
                permissionSet.AddPermission(new OdbcPermission(this));
            } 
            return permissionSet; 
        }
 
        protected internal override string Expand() {
            if (null != _expandedConnectionString) {
                return _expandedConnectionString;
            } 
            else {
                return base.Expand(); 
            } 
        }
    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.

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