remove value in drop down list...........................................................

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hi I can not speak good English,I wish I could say good

I have a drop down list in my project(asp.net framework 4 (c#))
I want to remove some value of these drop
The user could select a value from drop to remove it
The values of drop is hierarchically,The parent and child

I do not know how to do
Please help me
Thank you

Posted 29-Jun-13 22:32pm

nazanin6868

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Maciej Los 30-Jun-13 4:37am

What kind of object it is: ListBox, ComboBox?

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Mike Meinz · Answer 1 · 2013-06-29T23:46:00

Solution 1

The documentation for DropDownList says you can use the Remove or RemoveAt methods.

ListItemCollection Class

Remove the currently selected item

lstReservations.Items.RemoveAt(lstReservations.SelectedIndex)

In Visual Studio, you can click the Help menu item, then View Help to access the help file information for each of the .NET Framework Classes. Many of the help file entries have small examples.

Posted 29-Jun-13 23:46pm

Mike Meinz

Updated 30-Jun-13 3:47am

v4

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nazanin6868 30-Jun-13 8:52am

Thank you
but remove metod remove all value and I want to remove some value that user requset

Mike Meinz 30-Jun-13 9:07am

I use these two methods. I know what they do!

Remove() removes the item at a specified index - lstReservations.Items(idx).Remove()

RemoveAt() removes the item at the specified index. - lstReservations.Items.RemoveAt(idx)

Public method Remove Removes the specified item from the ComboBox.
Public method RemoveAt Removes an item from the ComboBox at the specified index.

nazanin6868 30-Jun-13 9:19am

ComboBox and dropdownlist are different?Methods used in these two controls are the same?
How should I use this method?

Mike Meinz 30-Jun-13 9:38am

DropDownList class has same methods for its ITEMS property. Remove() works a little differently but RemoveAt() works the same.

ListItemCollection Class

nazanin6868 30-Jun-13 9:46am

ok,Thank you very much

Mike Meinz 30-Jun-13 9:48am

I updated the Solution with an example.

nazanin6868 30-Jun-13 10:14am

thanks,but
The values of my drop is hierarchically,The parent and child

Mike Meinz 30-Jun-13 10:21am

I suggest you use Improve Question and rephrase your question to be very specific about your application and include some code that shows the DropDownList parent and child relationships.

Detailed questions get detailed answers!

nazanin6868 6-Jul-13 3:09am

Thank you very much,My problem was solved.