Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Data/System/Data/Odbc/OdbcConnectionOpen.cs

@@ -0,0 +1,84 @@
+//------------------------------------------------------------------------------
+// <copyright file="OdbcConnectionOpen.cs" company="Microsoft">
+//      Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+// <owner current="true" primary="true">[....]</owner>
+// <owner current="true" primary="false">[....]</owner>
+//------------------------------------------------------------------------------
+
+using System;
+using System.Data;
+using System.Data.Common;
+using System.Data.ProviderBase;
+using System.Threading;
+using SysTx = System.Transactions;
+
+namespace System.Data.Odbc {
+    sealed internal class OdbcConnectionOpen : DbConnectionInternal {      
+       
+        // Construct from a compiled connection string
+        internal OdbcConnectionOpen(OdbcConnection outerConnection, OdbcConnectionString connectionOptions) {
+#if DEBUG
+            try { // use this to help validate this object is only created after the following permission has been previously demanded in the current codepath
+                if (null != outerConnection) {
+                    outerConnection.UserConnectionOptions.DemandPermission();
+                }
+                else {
+                    connectionOptions.DemandPermission();
+                }
+            }
+            catch(System.Security.SecurityException) {
+                System.Diagnostics.Debug.Assert(false, "unexpected SecurityException for current codepath");
+                throw;
+            }
+#endif
+            OdbcEnvironmentHandle environmentHandle = OdbcEnvironment.GetGlobalEnvironmentHandle();
+            outerConnection.ConnectionHandle = new OdbcConnectionHandle(outerConnection, connectionOptions, environmentHandle);
+        }
+
+        internal OdbcConnection OuterConnection {
+            get {
+                OdbcConnection outerConnection = (OdbcConnection)Owner;
+
+                if (null == outerConnection)
+                    throw ODBC.OpenConnectionNoOwner();
+            
+                return outerConnection;
+            }
+        }
+        
+        override public string ServerVersion {
+            get { 
+                return OuterConnection.Open_GetServerVersion();
+            }
+        }
+        
+        override protected void Activate(SysTx.Transaction transaction) {
+            OdbcConnection.ExecutePermission.Demand();
+        }
+
+        override public DbTransaction BeginTransaction(IsolationLevel isolevel) {
+            return BeginOdbcTransaction(isolevel);
+        }
+        
+        internal OdbcTransaction BeginOdbcTransaction(IsolationLevel isolevel) {
+            return OuterConnection.Open_BeginTransaction(isolevel);
+        }
+        
+        override public void ChangeDatabase(string value) {
+            OuterConnection.Open_ChangeDatabase(value);
+        }
+
+        override protected DbReferenceCollection CreateReferenceCollection() {
+            return new OdbcReferenceCollection();
+        }
+        
+        override protected void Deactivate() {
+            NotifyWeakReference(OdbcReferenceCollection.Closing);
+        }
+          
+        override public void EnlistTransaction(SysTx.Transaction transaction) {
+            OuterConnection.Open_EnlistTransaction(transaction);
+        }
+    }
+}