Hello Ramesh,
thanks for your response. I tried out your example and it works well on our system. So I tried to find differences to the example in our project.
The main difference now is, that we are using masterpages on our sites. For adding scripts we are using the <asp:ScriptManager>control.
Without this control, everything works fine. But when we use this control, even if i don't bind the syncfusion scripts with it, I got an error:
Die Assembly "Syncfusion.EJ.Web, Version=13.2451.0.39, Culture=neutral, PublicKeyToken=3d67ed1f87d44c89" enthält keine Webressource mit dem Namen "Syncfusion.EJ.Olap.Resources.web.ej.dropdownlist.min.js"
Translated to english, this means, that the mentioned assembly does not contain any web ressource with the name [...]dropdownlist.min.js. Do you know, how we can solve this and still keep using the <asp:ScriptManager> control.
Best regards
Thomas Gramer