diff --git a/core/core.pro b/core/core.pro
index c0a6c46..5e996c1 100644
--- a/core/core.pro
+++ b/core/core.pro
@@ -125,7 +125,8 @@ HEADERS += core.h\
     reporting/reportviewer.h \
     reporting/reportdialog.h \
     iimporter.h \
-    csvimporter.h
+    csvimporter.h \
+    iimportprogress.h
 
 unix {
     target.path = /usr/lib
diff --git a/core/csvimporter.h b/core/csvimporter.h
index b395fd9..59a5489 100644
--- a/core/csvimporter.h
+++ b/core/csvimporter.h
@@ -5,7 +5,7 @@
 #include <QStringList>
 #include <QObject>
 
-class CsvImporter : public QObject, public IImporter
+class CORESHARED_EXPORT CsvImporter : public QObject, public IImporter
 {
     Q_OBJECT
 
diff --git a/core/iimporter.h b/core/iimporter.h
index 19d62a7..5326071 100644
--- a/core/iimporter.h
+++ b/core/iimporter.h
@@ -4,8 +4,9 @@
 #include <QMetaObject>
 #include <QObject>
 #include <QSharedPointer>
+#include "core_global.h"
 
-class IImporter
+class CORESHARED_EXPORT IImporter
 {
 public:
     explicit IImporter(const QMetaObject *metaObject) { m_metaObject = metaObject; }
diff --git a/core/iimportprogress.h b/core/iimportprogress.h
new file mode 100644
index 0000000..49fc035
--- /dev/null
+++ b/core/iimportprogress.h
@@ -0,0 +1,11 @@
+#ifndef IIMPORTPROGRESS_H
+#define IIMPORTPROGRESS_H
+
+class IImportProgress
+{
+public:
+    virtual void updateProgress(int currentPos) = 0;
+    virtual bool terminate() = 0;
+};
+
+#endif // IIMPORTPROGRESS_H
diff --git a/core/service.h b/core/service.h
index 60b9fa0..94c3760 100644
--- a/core/service.h
+++ b/core/service.h
@@ -4,6 +4,8 @@
 #include <QList>
 #include <QSharedPointer>
 #include <QString>
+#include <QEventLoop>
+#include <QApplication>
 
 #include <odb/core.hxx>
 #include <odb/transaction.hxx>
@@ -15,6 +17,7 @@
 #include "iservice.h"
 #include "permissionevaluator.h"
 #include "iimporter.h"
+#include "iimportprogress.h"
 
 #include "transaction.h"
 
@@ -179,7 +182,7 @@ public:
         }
     }
 
-    bool importData(IImporter *importer) {
+    bool importData(IImporter *importer, IImportProgress *progress = NULL) {
         int count = importer->recordCount();
 
         if (importer->isError()) {
@@ -201,6 +204,18 @@ public:
             {
                 return false;
             }
+
+            qApp->processEvents();
+
+            if (progress != NULL && progress->terminate())
+            {
+                return true;
+            }
+
+            if (progress != NULL)
+            {
+                progress->updateProgress(i * 100 / count);
+            }
         }
 
         return true;