c# - What does setting the SelectedIndex to -1 on a drop down list do? -


i have simple question here. have seen drop down list indexes set -1 when being reset.

what line of code doing?

mydropdownlist.selectedindex = -1;

how can set value less 0?

thank you!

-1 indicates there no selectedindex . setting selectedindex -1 show first item in list when load page.


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