private QvDataContractResponse GetPreview(UserParameter parameter, string appId, string objectId)
{
q2gconhypercubemain.Connection connection = null;
try
{
var oId = GetObjectId(objectId);
if (String.IsNullOrEmpty(oId))
{
throw new Exception("no object id for preview table found.");
}
var config = QlikApp.CreateConfig(parameter, appId);
var qlikApp = new QlikApp(parameter);
connection = qlikApp.CreateNewConnection(config);
var script = ScriptCode.Create(appId, oId);
var resultTable = tableFunctions.GetTableInfosFromApp("PreviewTable", script, connection.CurrentApp);
if (resultTable == null)
{
throw new Exception("no preview table found.");
}
return(PreviewResponse.Create(resultTable.Preview));
}
catch (Exception ex)
{
logger.Error(ex, $"fields from app {appId} and table {objectId} not loaded.");
return(new PreviewResponse());
}
finally
{
connection?.Close();
}
}
public static PreviewResponse Create(IPreviewResponse preview)
{
try
{
var result = new PreviewResponse()
{
MaxCount = preview.MaxCount,
};
result.qPreview.AddRange(preview.qPreview);
return(result);
}
catch (Exception ex)
{
logger.Error(ex, "The preview result could not create.");
return(new PreviewResponse());
}
}
public TableHelper GetTableInfosFromApp(string tableName, ScriptCode script, ConnectorParameter parameter, QlikApp qlikApp = null)
{
try
{
var resultTable = new QvxTable()
{
TableName = tableName,
};
HyperCubePager pager = null;
IEnumerable <int> columnOrder = null;
var fields = new List <QvxField>();
var rows = new List <QvxDataRow>();
var size = new Size();
if (qlikApp == null)
{
qlikApp = AppInstance.GetQlikInstance(parameter, script.AppId);
}
if (qlikApp == null)
{
return(null);
}
var masterObject = qlikApp.FirstSession.CurrentApp.GetMasterObjectAsync(script.ObjectId).Result;
if (masterObject != null)
{
logger.Debug($"find master object: {script.ObjectId}");
var genericObject = qlikApp.FirstSession.CurrentApp.CreateGenericSessionObjectAsync(masterObject.Properties).Result;
pager = genericObject.GetAllHyperCubePagers().FirstOrDefault() ?? null;
var tableLayout = genericObject.GetLayout().As <TableLayout>();
var hyperCube = tableLayout.HyperCube;
columnOrder = hyperCube.ColumnOrder;
size = hyperCube.Size;
fields.AddRange(GetHyperCubeFields(hyperCube.DimensionInfo, hyperCube.MeasureInfo, script));
}
var table = qlikApp.FirstSession.CurrentApp.GetObjectAsync <Table>(script.ObjectId).Result;
if (table != null)
{
logger.Debug($"table object: {script.ObjectId}");
pager = table.HyperCubePager;
columnOrder = table.ColumnOrder;
size = table.Size;
fields.AddRange(GetHyperCubeFields(table.DimensionInfo, table.MeasureInfo, script));
}
var preview = new PreviewResponse()
{
MaxCount = 15,
};
if (script != null)
{
var initalPage = new NxPage {
Top = 0, Left = 0, Width = size.cx, Height = preview.MaxCount
};
var allPages = new List <IEnumerable <NxDataPage> >();
allPages.Add(pager.GetData(new List <NxPage>()
{
initalPage
}));
if (script.Full)
{
var pageHeight = Math.Min(size.cy * size.cx, 5000) / size.cx;
logger.Debug($"read data - column count: {size.cx}");
initalPage = new NxPage {
Top = 0, Left = 0, Width = size.cx, Height = pageHeight
};
allPages = pager.IteratePages(new[] { initalPage }, Pager.Next).ToList();
preview.MaxCount = 0;
}
if (allPages == null)
{
throw new Exception($"no dimension in table {script.ObjectId} exits.");
}
logger.Debug($"read pages - count {allPages.Count}");
foreach (var page in allPages)
{
var allMatrix = page?.SelectMany(p => p.Matrix);
foreach (var matrix in allMatrix)
{
var row = new QvxDataRow();
var hrow = new PreviewRow();
var drow = new PreviewRow();
foreach (var order in columnOrder)
{
if (order < fields.Count)
{
var field = fields[order];
row[field] = matrix[order].Text;
if (!preview.qPreview.Any(s => s.qValues.Contains(field.FieldName)))
{
hrow.qValues.Add(field.FieldName);
}
if (preview.qPreview.Count <= preview.MaxCount)
{
drow.qValues.Add(matrix[order].Text);
}
}
}
rows.Add(row);
if (hrow.qValues.Count > 0)
{
preview.qPreview.Add(hrow);
}
if (drow.qValues.Count > 0)
{
preview.qPreview.Add(drow);
}
}
}
}
resultTable.Fields = fields.ToArray();
resultTable.GetRows = () => { return(rows); };
logger.Debug($"return table {resultTable.TableName}");
return(new TableHelper(resultTable, preview));
}
catch (Exception ex)
{
logger.Error(ex, "can´t read table infos.");
return(null);
}
}
public TableHelper(QvxTable table, PreviewResponse preview)
{
QvxTable = table;
Preview = preview;
}