DbDataReader IDataEngine.ExecuteReader(PageRequest request)
{
ViewPage page = new ViewPage(request);
if (_config == null)
{
_config = CreateConfiguration(request.Controller);
SelectView(request.Controller, request.View);
}
page.ApplyDataFilter(_config.CreateDataFilter(), request.Controller, request.View, null, null, null);
DbConnection connection = CreateConnection();
DbCommand selectCommand = CreateCommand(connection);
ConfigureCommand(selectCommand, page, CommandConfigurationType.Select, null);
return(selectCommand.ExecuteReader(CommandBehavior.CloseConnection));
}
object[] IDataController.GetListOfValues(string controller, string view, DistinctValueRequest request)
{
SelectView(controller, view);
ViewPage page = new ViewPage(request);
page.ApplyDataFilter(_config.CreateDataFilter(), controller, view, request.LookupContextController, request.LookupContextView, request.LookupContextFieldName);
List <object> distinctValues = new List <object>();
BusinessRules rules = _config.CreateBusinessRules();
if (rules != null)
{
rules.Page = page;
rules.BeforeSelect(request);
}
else
{
CreateBusinessRules().ExecuteServerRules(request, ActionPhase.Before);
}
using (DbConnection connection = CreateConnection())
{
DbCommand command = CreateCommand(connection);
ConfigureCommand(command, page, CommandConfigurationType.SelectDistinct, null);
DbDataReader reader = command.ExecuteReader();
while (reader.Read() && (distinctValues.Count < page.PageSize))
{
object v = reader.GetValue(0);
if (!(DBNull.Value.Equals(v)))
{
v = ConvertObjectToValue(v);
}
distinctValues.Add(v);
}
reader.Close();
}
if (rules != null)
{
rules.AfterSelect(request);
}
else
{
CreateBusinessRules().ExecuteServerRules(request, ActionPhase.After);
}
return(distinctValues.ToArray());
}
ViewPage IDataController.GetPage(string controller, string view, PageRequest request)
{
SelectView(controller, view);
request.AssignContext(controller, this._viewId);
ViewPage page = new ViewPage(request);
if (_config.PlugIn != null)
{
_config.PlugIn.PreProcessPageRequest(request, page);
}
_config.AssignDynamicExpressions(page);
page.ApplyDataFilter(_config.CreateDataFilter(), request.Controller, request.View, request.LookupContextController, request.LookupContextView, request.LookupContextFieldName);
BusinessRules rules = _config.CreateBusinessRules();
if (rules != null)
{
rules.Page = page;
rules.BeforeSelect(request);
}
else
{
CreateBusinessRules().ExecuteServerRules(request, ActionPhase.Before);
}
using (DbConnection connection = CreateConnection())
{
if (page.RequiresRowCount && !((request.Inserting || request.DoesNotRequireData)))
{
DbCommand countCommand = CreateCommand(connection);
ConfigureCommand(countCommand, page, CommandConfigurationType.SelectCount, null);
if (YieldsSingleRow(countCommand))
{
page.TotalRowCount = 1;
}
else
{
page.TotalRowCount = Convert.ToInt32(countCommand.ExecuteScalar());
}
if (page.RequiresAggregates)
{
DbCommand aggregateCommand = CreateCommand(connection);
ConfigureCommand(aggregateCommand, page, CommandConfigurationType.SelectAggregates, null);
DbDataReader reader = aggregateCommand.ExecuteReader();
if (reader.Read())
{
object[] aggregates = new object[page.Fields.Count];
for (int i = 0; (i < aggregates.Length); i++)
{
DataField field = page.Fields[i];
if (field.Aggregate != DataFieldAggregate.None)
{
object v = reader[field.Name];
if (!(DBNull.Value.Equals(v)))
{
aggregates[i] = v;
}
}
}
page.Aggregates = aggregates;
}
reader.Close();
}
}
if (page.RequiresMetaData)
{
PopulatePageCategories(page);
}
DbCommand selectCommand = CreateCommand(connection);
ConfigureCommand(selectCommand, page, CommandConfigurationType.Select, null);
if ((page.PageSize > 0) && !((request.Inserting || request.DoesNotRequireData)))
{
DbDataReader reader = null;
if (selectCommand == null)
{
reader = ExecuteVirtualReader(request, page);
}
else
{
reader = TransactionManager.ExecuteReader(request, page, selectCommand);
}
while (page.SkipNext())
{
reader.Read();
}
while (page.ReadNext() && reader.Read())
{
object[] values = new object[page.Fields.Count];
for (int i = 0; (i < values.Length); i++)
{
DataField field = page.Fields[i];
object v = reader[field.Name];
if (!(DBNull.Value.Equals(v)))
{
if (field.IsMirror)
{
v = String.Format(field.DataFormatString, v);
}
else
{
v = ConvertObjectToValue(v);
}
values[i] = v;
}
if (!(String.IsNullOrEmpty(field.SourceFields)))
{
values[i] = CreateValueFromSourceFields(field, reader);
}
}
page.Rows.Add(values);
}
reader.Close();
}
if (request.RequiresFirstLetters && this._viewType != "Form")
{
if (!(page.RequiresRowCount))
{
page.FirstLetters = String.Empty;
}
else
{
DbCommand firstLettersCommand = CreateCommand(connection);
string[] oldFilter = page.Filter;
ConfigureCommand(firstLettersCommand, page, CommandConfigurationType.SelectFirstLetters, null);
page.Filter = oldFilter;
if (!(String.IsNullOrEmpty(page.FirstLetters)))
{
DbDataReader reader = firstLettersCommand.ExecuteReader();
StringBuilder firstLetters = new StringBuilder(page.FirstLetters);
while (reader.Read())
{
firstLetters.Append(",");
string letter = Convert.ToString(reader[0]);
if (!(String.IsNullOrEmpty(letter)))
{
firstLetters.Append(letter);
}
}
reader.Close();
page.FirstLetters = firstLetters.ToString();
}
}
}
}
if (_config.PlugIn != null)
{
_config.PlugIn.ProcessPageRequest(request, page);
}
if (rules != null)
{
IRowHandler rowHandler = rules;
if (request.Inserting)
{
if (rowHandler.SupportsNewRow(request))
{
page.NewRow = new object[page.Fields.Count];
rowHandler.NewRow(request, page, page.NewRow);
}
}
else
if (rowHandler.SupportsPrepareRow(request))
{
foreach (object[] row in page.Rows)
{
rowHandler.PrepareRow(request, page, row);
}
}
if (rules != null)
{
rules.ProcessPageRequest(request, page);
}
}
page = page.ToResult(_config, _view);
if (rules != null)
{
rules.AfterSelect(request);
rules.Result.Merge(page);
}
else
{
CreateBusinessRules().ExecuteServerRules(request, ActionPhase.After);
}
return(page);
}
private void ExecuteDataExport(ActionArgs args, ActionResult result)
{
if (!(String.IsNullOrEmpty(args.CommandArgument)))
{
string[] arguments = args.CommandArgument.Split(',');
if (arguments.Length > 0)
{
bool sameController = (args.Controller == arguments[0]);
args.Controller = arguments[0];
if (arguments.Length == 1)
{
args.View = "grid1";
}
else
{
args.View = arguments[1];
}
if (sameController)
{
args.SortExpression = null;
}
SelectView(args.Controller, args.View);
}
}
PageRequest request = new PageRequest(-1, -1, null, null);
request.SortExpression = args.SortExpression;
request.Filter = args.Filter;
request.ContextKey = null;
request.PageIndex = 0;
request.PageSize = Int32.MaxValue;
if (args.CommandName.EndsWith("Template"))
{
request.PageSize = 0;
args.CommandName = "ExportCsv";
}
// store export data to a temporary file
string fileName = Path.GetTempFileName();
StreamWriter writer = File.CreateText(fileName);
try
{
ViewPage page = new ViewPage(request);
page.ApplyDataFilter(_config.CreateDataFilter(), args.Controller, args.View, null, null, null);
using (DbConnection connection = CreateConnection())
{
DbCommand selectCommand = CreateCommand(connection);
ConfigureCommand(selectCommand, page, CommandConfigurationType.Select, null);
DbDataReader reader = selectCommand.ExecuteReader();
if (args.CommandName.EndsWith("Csv"))
{
ExportDataAsCsv(page, reader, writer);
}
if (args.CommandName.EndsWith("Rss"))
{
ExportDataAsRss(page, reader, writer);
}
if (args.CommandName.EndsWith("Rowset"))
{
ExportDataAsRowset(page, reader, writer);
}
reader.Close();
}
}
finally
{
writer.Close();
}
result.Values.Add(new FieldValue("FileName", null, fileName));
}