The error "his.value is not a function" is because `this` in the context of the button click handler is not the Kendo DropDown widget. Instead you must get reference to the DropDown widget use its value API method.
"in my case,the id of each field is EntityField_GuidNumber is difficult to take each field separately and filter based on that,instead i put all the inputs in a <form></form> somehow i should get all the values from that form,and create a filter expression,that later is applied to the source of the grid.
so what is the solution to this problem?"
- The values from the fields can be extracted with DOM operations. You can use the help of jQuery serializeArray.
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