initial oogynize check in _ this actually used to work!

DataAccessLayer/dVersioningTables.cs

@@ -0,0 +1,108 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Data.SqlServerCe;
+using Foo.DataAccessLayer.DataTypes;
+
+namespace Foo.DataAccessLayer
+{
+    internal class dVersioningTables
+    {
+
+        /// <summary>
+        /// Quick Check if there is Version Information available for this Table
+        /// </summary>
+        /// <param name="TableName">a table name to check</param>
+        /// <returns>true if the DB has version information for this Table</returns>
+        internal bool DoesTableHaveVersionEntry(string TableName)
+        {            
+            // Check TableName Integrity
+            if (!DataTypeValidation.IsValidTableName(TableName))
+                return false;
+
+            object obj = null;
+            lock (this)
+            {
+                string sql = "SELECT [TableName] FROM VersioningTables WHERE [TableName] = @tablename";
+                SqlCeParameter[] sqlparams = new SqlCeParameter[] { new SqlCeParameter("@tablename", TableName) };
+
+                obj = DB.RunSQLCommandTextExecuteScalar(sql, sqlparams);
+            }
+            return (obj != null);
+        }
+
+        /// <summary>
+        /// Retrieve the Version information for the specified Table
+        /// </summary>
+        /// <param name="TableName">a table name to check</param>
+        /// <returns>version information string, or empty.string if not found</returns>
+        internal string GetVersionInformationForTable(string TableName)
+        {
+            // Check TableName Integrity
+            if (!DataTypeValidation.IsValidTableName(TableName))
+                return String.Empty;
+
+            object obj = null;
+            lock (this)
+            {
+                string sql = "SELECT [Version] FROM VersioningTables WHERE [TableName] = @tablename";
+                SqlCeParameter[] sqlparams = new SqlCeParameter[] { new SqlCeParameter("@tablename", TableName) };
+
+                obj = DB.RunSQLCommandTextExecuteScalar(sql, sqlparams);
+                if (obj != null)
+                    return obj.ToString();
+            }
+            return String.Empty;
+        }
+
+        /// <summary>
+        /// Use this most often to insert/update the version information of a table into the VersioningTables Table
+        /// </summary>
+        /// <param name="TableName">The table name for which to insert version information</param>
+        /// <param name="VersionInformation">the version information in the format of n.n.nnnn</param>
+        /// <returns>true if successfully inserted or updated, false otherwise</returns>
+        internal bool AddUpdateVersionInformationForSpecifiedTable(string TableName, string VersionInformation)
+        {
+            // Check TableName Integrity
+            if (!DataTypeValidation.IsValidTableName(TableName))
+                return false;
+
+            // Check Version Integrity
+            if (!DataTypeValidation.IsValidVersionInformation(VersionInformation))
+                return false;
+
+            lock (this)
+            {
+                // First Determine if we need to update or insert
+                bool bUpdate = DoesTableHaveVersionEntry(TableName);
+
+                if (!bUpdate) // we need to insert
+                {
+                    string sql = "INSERT INTO VersioningTables ([TableName],[Version]) VALUES (@tablename,@version)";
+                    SqlCeParameter[] sqlparams = new SqlCeParameter[] 
+                    { 
+                        new SqlCeParameter("@tablename", TableName),
+                        new SqlCeParameter("@version", VersionInformation),
+                    };
+
+                    int nResult = DB.RunSQLCommandTextExecuteNonQuery(sql, sqlparams);
+                    return (nResult == 1);                    
+                }
+                else // we need to update
+                {
+                    string sql2 = "UPDATE VersioningTables SET [Version]=@version WHERE [TableName]=@tablename";
+                    SqlCeParameter[] sqlparams2 = new SqlCeParameter[] 
+                    { 
+                        new SqlCeParameter("@tablename", TableName),
+                        new SqlCeParameter("@version", VersionInformation),
+                    };
+
+
+                    int nResult2 = DB.RunSQLCommandTextExecuteNonQuery(sql2, sqlparams2);
+                    return (nResult2 == 1);
+                }
+            }            
+        }
+    }
+}