Onselectedindexchanged is firing

In grid row command ev开发者_运维技巧ent I am calling a .ascx page as a popup.

In the popup I have one button, on clicking the button, I'm calling one more popup.

Under the second popup I have four dropdown controls, in the dropdown controls I'm filtering and filling the data one after another.

The problem here is, if I filter the third dropdown, the second dropdown field data is getting reset(Onselectedindexchanged is firing).

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You might be reloading/binding the drop downs on post back. You may want to change it to something like this

if(!Page.IsPostback) { //load the dropdowns the first time. }