C# DBConnection.Open方法代码示例

 public override void SaveTraceToDb()
 {
     LoggingService.Info("开始保存痕迹记录...");
     DBConnection connection = new DBConnection(base.SMDataSource);
     connection.Open();
     try
     {
         if (LoggingService.IsDebugEnabled)
         {
             LoggingService.DebugFormatted("共有修改或添加的痕迹记录：{0}条，删除记录：{1}条", new object[] { this.TraceTable.Rows.Count, (this._RecDelTable == null) ? 0 : this._RecDelTable.Rows.Count });
         }
         DbTransaction transaction = connection.BeginTrasaction() as DbTransaction;
         DbDataAdapter adapter = this.TraceTable.ExtendedProperties["da"] as DbDataAdapter;
         adapter.InsertCommand.Connection = connection.Connection as DbConnection;
         adapter.InsertCommand.Transaction = transaction;
         adapter.Update(this.TraceTable);
         if (TraceUtil.CanTraceLevel(TraceLevel.Deleted))
         {
             DbDataAdapter adapter2 = this._RecDelTable.ExtendedProperties["da"] as DbDataAdapter;
             adapter2.InsertCommand.Connection = connection.Connection as DbConnection;
             adapter2.InsertCommand.Transaction = transaction;
             adapter2.Update(this._RecDelTable);
         }
         connection.CommitTransaction();
     }
     catch (DbException exception)
     {
         connection.RollBackTransaction();
         string dataSetName = "TraceDb" + DateTimeHelper.GetNow().ToString();
         DataSet set = new DataSet(dataSetName);
         set.Tables.Add(this.TraceTable);
         set.Tables.Add(this._RecDelTable);
         set.WriteXml(Environment.CurrentDirectory + @"\" + dataSetName + ".xml");
         throw new DataFormException("数据修改日志记录保存不成功能（数据已成功能保存）！", exception);
     }
     finally
     {
         connection.Close();
         this.TraceTable.Rows.Clear();
         if (this._RecDelTable != null)
         {
             this._RecDelTable.Rows.Clear();
         }
     }
 }

 public DataSet RefreshDataset(SMDataSource smDS, DataSet ds)
 {
     DBConnection connection = new DBConnection(smDS);
     connection.Open();
     try
     {
         for (int i = 0; i < ds.Tables.Count; i++)
         {
             DataTable dt = ds.Tables[i];
             dt.Rows.Clear();
             string sql = (string) dt.ExtendedProperties["selectsql"];
             connection.ExecuteSql(dt, sql);
         }
     }
     finally
     {
         connection.Close();
     }
     return ds;
 }

 public virtual DataSet GetDs(string dataFormID, string keyValue)
 {
     DataSet set2;
     DAODataForm dAODataForm = this.GetDAODataForm(dataFormID);
     if (LoggingService.IsInfoEnabled)
     {
         LoggingService.InfoFormatted("准备获取表单：'{0}',键值：'{1}'的业务表单数据!", new object[] { dAODataForm.Name, keyValue });
     }
     if (dAODataForm == null)
     {
         throw new DataFormException("没有找到数据表单配置信息!");
     }
     DataSet set = new DataSet(dAODataForm.Name);
     DBConnection dbcn = new DBConnection(dAODataForm.DataSource);
     dbcn.Open();
     try
     {
         this.SyncDataSouce(keyValue, dAODataForm, dbcn);
         foreach (DAODataTable table in dAODataForm.BindTables)
         {
             if (!set.Tables.Contains(table.Name))
             {
                 set.Tables.Add(this.GetDataTable(table, keyValue, dbcn));
             }
         }
         set.AcceptChanges();
         set2 = set;
     }
     catch (ApplicationException exception)
     {
         throw exception;
     }
     finally
     {
         dbcn.Close();
     }
     return set2;
 }

 public static void Delete(IDictionary<DAODataSet, string> deletes)
 {
     Exception exception;
     try
     {
         string str = string.Empty;
         DAODataSet key = null;
         List<string> list = new List<string>(deletes.Count);
         List<string> list2 = new List<string>(deletes.Count);
         foreach (KeyValuePair<DAODataSet, string> pair in deletes)
         {
             key = pair.Key;
             foreach (DAODataTable table in key.DAODataTables)
             {
                 str = str + "delete from " + table.Name + " where ";
                 if (table.Level)
                 {
                     str = str + table.RelKey;
                 }
                 else
                 {
                     str = str + table.Key;
                     list.Add(table.Name);
                     list2.Add(pair.Value.ToString().Replace("'", ""));
                 }
                 str = str + " in (" + pair.Value + ");\r";
             }
         }
         if (str != string.Empty)
         {
             DBConnection connection = new DBConnection(key.DataSource);
             connection.Open();
             IDbTransaction transaction = connection.BeginTrasaction();
             try
             {
                 IDbCommand command = connection.Connection.CreateCommand();
                 command.Transaction = transaction;
                 command.CommandText = str;
                 command.CommandType = CommandType.Text;
                 command.ExecuteNonQuery();
                 connection.CommitTransaction();
             }
             catch (Exception exception1)
             {
                 exception = exception1;
                 connection.RollBackTransaction();
                 throw exception;
             }
             finally
             {
                 connection.Close();
             }
             try
             {
                 ITraceDb traceDB = GetTraceDB(key.DataSource);
                 if (TraceUtil.CanTraceLevel(TraceLevel.Deleted) && (traceDB != null))
                 {
                     traceDB.TraceOuterRemove(list.ToArray(), list2.ToArray(), "经由系统(可能是前台工作流完全删除)操作删除进行的记录,注意它并没有对子表的删除进行记录.");
                     traceDB.SaveTraceToDb();
                 }
             }
             catch (Exception exception2)
             {
                 exception = exception2;
                 log.Error("进行删除的痕迹记录出错:", exception);
             }
         }
     }
     catch (Exception exception3)
     {
         exception = exception3;
         throw new DataFormException("delete data raise error!", exception);
     }
 }

 public static void Initial(SMDataSource smDS, IList<DAODataTable> ddts, bool onlyTopLevel, string[] keys, string[] fields, IList<string[]> vals)
 {
     Exception exception;
     ITraceDb traceDB = GetTraceDB(smDS);
     bool canTraceAdd = TraceUtil.CanTraceLevel(TraceLevel.Added) && (traceDB != null);
     StringBuilder builder = new StringBuilder();
     foreach (DAODataTable table in ddts)
     {
         if (!onlyTopLevel || !table.Level)
         {
             string str = CreateInsertTableSQL(keys, fields, vals, traceDB, canTraceAdd, table);
             if (!string.IsNullOrEmpty(str))
             {
                 builder.Append(str).Append("\r\n");
             }
         }
     }
     if (builder.Length > 0)
     {
         DBConnection dbcn = new DBConnection(smDS);
         dbcn.Open();
         try
         {
             Execute(dbcn, builder.ToString(), null);
         }
         catch (Exception exception1)
         {
             exception = exception1;
             throw new DataFormException("Initial data raise error", exception);
         }
         finally
         {
             dbcn.Close();
         }
     }
     if (canTraceAdd)
     {
         try
         {
             traceDB.SaveTraceToDb();
         }
         catch (Exception exception2)
         {
             exception = exception2;
             log.Error("系统对新增数据进行痕记录时出错:", exception);
         }
     }
 }

 protected override DataTable QueryTrace(string table, string field, string keyValue)
 {
     DataTable table3;
     StringBuilder builder = new StringBuilder(100);
     builder.Append("select * from ").Append(TraceUtil.TraceTableName);
     builder.Append(" \r where ").Append(TraceUtil.FLD_TABLE).Append("='").Append(table);
     builder.Append("' \r and ").Append(TraceUtil.FLD_FIELD).Append("='").Append(field);
     builder.Append("' \r and ").Append(TraceUtil.FLD_KEY).Append("='").Append(keyValue);
     builder.Append("' \r order by ").Append(TraceUtil.FLD_TIMESTAMP);
     DBConnection connection = new DBConnection(base.SMDataSource);
     connection.Open();
     try
     {
         DataTable dt = new DataTable();
         connection.ExecuteSql(dt, builder.ToString());
         table3 = dt;
     }
     finally
     {
         connection.Close();
     }
     return table3;
 }

        private void initDatabaseConnection( DBConnection connection )
        {
            if( connection.DatabaseInfo.SecondaryDatabaseName.Any()
                    ? secondaryDatabasesWithInitializedConnections.Contains( connection.DatabaseInfo.SecondaryDatabaseName )
                    : primaryDatabaseConnectionInitialized )
                return;

            connection.Open();
            if( DataAccessStatics.DatabaseShouldHaveAutomaticTransactions( connection.DatabaseInfo ) )
                connection.BeginTransaction();

            if( connection.DatabaseInfo.SecondaryDatabaseName.Any() )
                secondaryDatabasesWithInitializedConnections.Add( connection.DatabaseInfo.SecondaryDatabaseName );
            else
                primaryDatabaseConnectionInitialized = true;
        }

 private DataTable GetSchemaTable()
 {
     DataTable schemaTable;
     DBConnection connection = new DBConnection(this.daoDataTable.TempletDataSet.DataSource);
     connection.Open();
     try
     {
         IDbCommand command = connection.Connection.CreateCommand();
         command.CommandType = CommandType.Text;
         command.CommandText = "select * from " + this.daoDataTable.Name + " where 1<>1";
         IDataReader reader = command.ExecuteReader();
         try
         {
             schemaTable = reader.GetSchemaTable();
         }
         finally
         {
             reader.Close();
         }
     }
     catch (Exception exception)
     {
         throw exception;
     }
     finally
     {
         connection.Close();
     }
     return schemaTable;
 }

 private void SaveDataToSQlDB(SMDataSource smDS, ref DataTable dt)
 {
     DBConnection connection = new DBConnection(smDS);
     connection.Open();
     try
     {
         IDbTransaction transaction = connection.BeginTrasaction();
         DataTable dataTable = dt;
         if (dataTable.GetChanges() != null)
         {
             string strSelect = (string) dataTable.ExtendedProperties["selectsql"];
             DbDataAdapter adapter = connection.GetDataAdapter(strSelect, true, true, true);
             try
             {
                 adapter.Update(dataTable);
             }
             catch (DBConcurrencyException exception)
             {
                 throw new DataFormException(exception.Message, exception);
             }
         }
         connection.CommitTransaction();
     }
     catch (Exception exception2)
     {
         connection.RollBackTransaction();
         throw exception2;
     }
     finally
     {
         connection.Close();
     }
     dt = this.RefreshDataset(smDS, dt);
 }