diff --git a/src/xlsx/xlsxsharedstrings.cpp b/src/xlsx/xlsxsharedstrings.cpp
index 25f26fb..8f913a3 100755
--- a/src/xlsx/xlsxsharedstrings.cpp
+++ b/src/xlsx/xlsxsharedstrings.cpp
@@ -61,6 +61,11 @@ int SharedStrings::addSharedString(const QString &string)
 
 void SharedStrings::incRefByStringIndex(int idx)
 {
+    if (idx <0 || idx >= m_stringList.size()) {
+        qDebug("SharedStrings: invlid index");
+        return;
+    }
+
     addSharedString(m_stringList[idx]);
 }
 
diff --git a/src/xlsx/xlsxstyles.cpp b/src/xlsx/xlsxstyles.cpp
index e879bab..1a2cb7d 100755
--- a/src/xlsx/xlsxstyles.cpp
+++ b/src/xlsx/xlsxstyles.cpp
@@ -63,7 +63,7 @@ Format *Styles::createFormat()
 
 Format *Styles::xfFormat(int idx) const
 {
-    if (idx <0 || idx > m_xf_formatsList.size())
+    if (idx <0 || idx >= m_xf_formatsList.size())
         return 0;
 
     return m_xf_formatsList[idx];
diff --git a/src/xlsx/xlsxworkbook.h b/src/xlsx/xlsxworkbook.h
index 607198d..c9e54b2 100755
--- a/src/xlsx/xlsxworkbook.h
+++ b/src/xlsx/xlsxworkbook.h
@@ -69,6 +69,7 @@ public:
 private:
     friend class Package;
     friend class Worksheet;
+    friend class WorksheetPrivate;
     friend class Document;
     friend class DocumentPrivate;
 
diff --git a/src/xlsx/xlsxworksheet.cpp b/src/xlsx/xlsxworksheet.cpp
index 45e8fa7..adb056c 100755
--- a/src/xlsx/xlsxworksheet.cpp
+++ b/src/xlsx/xlsxworksheet.cpp
@@ -1076,65 +1076,89 @@ QByteArray Worksheet::saveToXmlData()
     return data;
 }
 
+void WorksheetPrivate::readSheetData(XmlStreamReader &reader)
+{
+    Q_ASSERT(reader.name() == QLatin1String("sheetData"));
+
+    while(!(reader.name() == QLatin1String("sheetData") && reader.tokenType() == QXmlStreamReader::EndElement)) {
+        reader.readNextStartElement();
+
+        if (reader.tokenType() == QXmlStreamReader::StartElement) {
+            if (reader.name() == QLatin1String("c")) {
+                QXmlStreamAttributes attributes = reader.attributes();
+                QString r = attributes.value(QLatin1String("r")).toString();
+                QPoint pos = xl_cell_to_rowcol(r);
+
+                //get format
+                Format *format = 0;
+                if (attributes.hasAttribute(QLatin1String("s"))) {
+                    int idx = attributes.value(QLatin1String("s")).toInt();
+                    format = workbook->styles()->xfFormat(idx);
+                }
+
+                if (attributes.hasAttribute(QLatin1String("t"))) {
+                    QString type = attributes.value(QLatin1String("t")).toString();
+                    if (type == QLatin1String("s")) {
+                        //string type
+                        reader.readNextStartElement();
+                        if (reader.name() == QLatin1String("v")) {
+                            QString value = reader.readElementText();
+                            workbook->sharedStrings()->incRefByStringIndex(value.toInt());
+                            XlsxCellData *data = new XlsxCellData(value ,XlsxCellData::String, format);
+                            cellTable[pos.x()][pos.y()] = QSharedPointer<XlsxCellData>(data);
+                        }
+                    } else if (type == QLatin1String("b")) {
+                        //bool type
+                    }
+                } else {
+                    //number type
+                    reader.readNextStartElement();
+                    if (reader.name() == QLatin1String("v")) {
+                        QString value = reader.readElementText();
+                        XlsxCellData *data = new XlsxCellData(value ,XlsxCellData::Number, format);
+                        cellTable[pos.x()][pos.y()] = QSharedPointer<XlsxCellData>(data);
+                    }
+                }
+            }
+        }
+    }
+}
+
 bool Worksheet::loadFromXmlFile(QIODevice *device)
 {
     Q_D(Worksheet);
 
     XmlStreamReader reader(device);
     while(!reader.atEnd()) {
-         QXmlStreamReader::TokenType token = reader.readNext();
-         if (token == QXmlStreamReader::StartElement) {
-             if (reader.name() == QLatin1String("dimension")) {
-                 QXmlStreamAttributes attributes = reader.attributes();
-                 QStringList range = attributes.value(QLatin1String("ref")).toString().split(QLatin1Char(':'));
-                 if (range.size() == 2) {
-                     QPoint start = xl_cell_to_rowcol(range[0]);
-                     QPoint end = xl_cell_to_rowcol(range[1]);
-                     d->dim_rowmin = start.x();
-                     d->dim_colmin = start.y();
-                     d->dim_rowmax = end.x();
-                     d->dim_colmax = end.y();
-                 } else {
-                     QPoint p = xl_cell_to_rowcol(range[0]);
-                     d->dim_rowmin = p.x();
-                     d->dim_colmin = p.y();
-                     d->dim_rowmax = p.x();
-                     d->dim_colmax = p.y();
-                 }
-             } else if (reader.name() == QLatin1String("c")) {
-                 QXmlStreamAttributes attributes = reader.attributes();
-                 QString r = attributes.value(QLatin1String("r")).toString();
-                 QPoint pos = xl_cell_to_rowcol(r);
-
-                 Format *format = 0;
-                 if (attributes.hasAttribute(QLatin1String("s"))) {
-                     int idx = attributes.value(QLatin1String("s")).toInt();
-                     format = d->workbook->styles()->xfFormat(idx);
-                 }
-
-                 if (attributes.hasAttribute(QLatin1String("t"))) {
-                     QString type = attributes.value(QLatin1String("t")).toString();
-                     if (type == QLatin1String("s")) {
-                         //string type
-                         reader.readNextStartElement();
-                         if (reader.name() == QLatin1String("v")) {
-                             QString value = reader.readElementText();
-                             d->workbook->sharedStrings()->incRefByStringIndex(value.toInt());
-                             XlsxCellData *data = new XlsxCellData(value ,XlsxCellData::String, format);
-                             d->cellTable[pos.x()][pos.y()] = QSharedPointer<XlsxCellData>(data);
-                         }
-                     }
-                 } else {
-                     //number type
-                     reader.readNextStartElement();
-                     if (reader.name() == QLatin1String("v")) {
-                         QString value = reader.readElementText();
-                         XlsxCellData *data = new XlsxCellData(value ,XlsxCellData::Number, format);
-                         d->cellTable[pos.x()][pos.y()] = QSharedPointer<XlsxCellData>(data);
-                     }
-                 }
-             }
-         }
+        reader.readNextStartElement();
+        if (reader.tokenType() == QXmlStreamReader::StartElement) {
+            if (reader.name() == QLatin1String("dimension")) {
+                QXmlStreamAttributes attributes = reader.attributes();
+                QStringList range = attributes.value(QLatin1String("ref")).toString().split(QLatin1Char(':'));
+                if (range.size() == 2) {
+                    QPoint start = xl_cell_to_rowcol(range[0]);
+                    QPoint end = xl_cell_to_rowcol(range[1]);
+                    d->dim_rowmin = start.x();
+                    d->dim_colmin = start.y();
+                    d->dim_rowmax = end.x();
+                    d->dim_colmax = end.y();
+                } else {
+                    QPoint p = xl_cell_to_rowcol(range[0]);
+                    d->dim_rowmin = p.x();
+                    d->dim_colmin = p.y();
+                    d->dim_rowmax = p.x();
+                    d->dim_colmax = p.y();
+                }
+            } else if (reader.name() == QLatin1String("sheetViews")) {
+
+            } else if (reader.name() == QLatin1String("sheetFormatPr")) {
+
+            } else if (reader.name() == QLatin1String("cols")) {
+
+            } else if (reader.name() == QLatin1String("sheetData")) {
+                d->readSheetData(reader);
+            }
+        }
     }
 
     return true;
diff --git a/src/xlsx/xlsxworksheet.h b/src/xlsx/xlsxworksheet.h
index e42036d..5236444 100755
--- a/src/xlsx/xlsxworksheet.h
+++ b/src/xlsx/xlsxworksheet.h
@@ -40,7 +40,6 @@ class WorksheetTest;
 QT_BEGIN_NAMESPACE_XLSX
 class Package;
 class Workbook;
-class XmlStreamWriter;
 class Format;
 class Drawing;
 struct XlsxImageData;
diff --git a/src/xlsx/xlsxworksheet_p.h b/src/xlsx/xlsxworksheet_p.h
index 28e3d1e..485d759 100644
--- a/src/xlsx/xlsxworksheet_p.h
+++ b/src/xlsx/xlsxworksheet_p.h
@@ -24,6 +24,7 @@
 ****************************************************************************/
 #ifndef XLSXWORKSHEET_P_H
 #define XLSXWORKSHEET_P_H
+#include "xlsxglobal.h"
 #include "xlsxworksheet.h"
 
 #include <QImage>
@@ -31,6 +32,9 @@
 
 namespace QXlsx {
 
+class XmlStreamWriter;
+class XmlStreamReader;
+
 struct XlsxCellData
 {
     enum CellDataType {
@@ -173,7 +177,7 @@ struct XlsxColumnInfo
     bool hidden;
 };
 
-class WorksheetPrivate
+class XLSX_AUTOTEST_EXPORT WorksheetPrivate
 {
     Q_DECLARE_PUBLIC(Worksheet)
 public:
@@ -192,6 +196,8 @@ public:
     XlsxObjectPositionData objectPixelsPosition(int col_start, int row_start, double x1, double y1, double width, double height);
     XlsxObjectPositionData pixelsToEMUs(const XlsxObjectPositionData &data);
 
+    void readSheetData(XmlStreamReader &reader);
+
     Workbook *workbook;
     Drawing *drawing;
     QMap<int, QMap<int, QSharedPointer<XlsxCellData> > > cellTable;
diff --git a/tests/auto/worksheet/tst_worksheet.cpp b/tests/auto/worksheet/tst_worksheet.cpp
index 65b5f8c..f263076 100644
--- a/tests/auto/worksheet/tst_worksheet.cpp
+++ b/tests/auto/worksheet/tst_worksheet.cpp
@@ -2,6 +2,8 @@
 #include <QtTest>
 
 #include "xlsxworksheet.h"
+#include "private/xlsxworksheet_p.h"
+#include "private/xlsxxmlreader_p.h"
 
 class WorksheetTest : public QObject
 {
@@ -14,6 +16,8 @@ private Q_SLOTS:
     void testEmptySheet();
     void testMerge();
     void testUnMerge();
+
+    void testReadSheetData();
 };
 
 WorksheetTest::WorksheetTest()
@@ -51,6 +55,25 @@ void WorksheetTest::testUnMerge()
     QVERIFY2(!xmldata.contains("<mergeCell"), "");
 }
 
+void WorksheetTest::testReadSheetData()
+{
+    const QByteArray xmlData = "<sheetData>"
+            "<row r=\"1\" spans=\"1:6\">"
+            "<c r=\"A1\" s=\"1\" t=\"s\"><v>0</v></c>"
+            "</row>"
+            "<row r=\"3\" spans=\"1:6\">"
+            "<c r=\"B3\" s=\"1\"><v>12345</v></c>"
+            "</row>"
+            "</sheetData>";
+    QXlsx::XmlStreamReader reader(xmlData);
+    reader.readNextStartElement();//current node is sheetData
+
+    QXlsx::Worksheet sheet("", 0);
+    sheet.d_ptr->readSheetData(reader);
+
+    QCOMPARE(sheet.d_ptr->cellTable.size(), 2);
+}
+
 QTEST_APPLESS_MAIN(WorksheetTest)
 
 #include "tst_worksheet.moc"