Clearing a drop down list in C#

问题

I truly do hate to ask such a crayon-question... I'm trying to clear, not remove a drop down combo list in VSC#. My ddl lets the user choose the payRate of an employee. I've researched everywhere, even here, and everything suggests using..

   cmboPayRate.Items.Clear();   .. or
   cmboPayRate.SelectedIndex = - 1;

I even threw in

cmboPayRate.SelectedItem = -1;   

for safe measure. Nothing working. Again, I know this is easy(should be), but not working for me. Any suggestions would be greatly appreciated.

Thanks -Matt.

回答1:

try

DropDownList1.Items.Clear(); 

No hidden and clear the Drop Down List.

回答2:

you can do as below

while(cmboPayRate.Items.Count>0)
   cmboPayRate.Items.RemoveAt(0);

来源：https://stackoverflow.com/questions/17519278/clearing-a-drop-down-list-in-c-sharp