Update README.md

Sample and image added.

Author: Indumathi1195R

README.md

@@ -54,3 +54,11 @@ body: Card(
   ),
 )
 ```
+**[View document in Syncfusion Flutter Knowledge base](https://www.syncfusion.com/kb/11305/how-to-switch-between-the-date-range-picker-views-in-flutter-date-range-picker)**
+
+**Screenshots**
+
+![](http://www.syncfusion.com/uploads/user/kb/flut/flut-852/flut-852_img1.png)
+![](http://www.syncfusion.com/uploads/user/kb/flut/flut-852/flut-852_img2.png)
+![](http://www.syncfusion.com/uploads/user/kb/flut/flut-852/flut-852_img3.png)
+![](http://www.syncfusion.com/uploads/user/kb/flut/flut-852/flut-852_img4.png)