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A standard list box is a box containing a list of multiple items, with multiple items visible.The following terms are important to understand as you read this article: With a standard drop-down list, users are limited to choices in the list, but with a combo box they can enter a choice that isn't in the list. Users can choose one and only one option. With a drop-down list or combo box, users make a choice among a list of mutually exclusive values. Much of the guidance still applies in principle, but the presentation and examples do not reflect our current design guidance. (((DropDownList)sender).This design guide was created for Windows 7 and has not been updated for newer versions of Windows. Protected void SiteSelected(object sender, EventArgs e) Protected void Page_Load(object sender, EventArgs e)ĭ(new ListItem(site.Key, site.Value)) Protected override void OnInit(EventArgs e) your constructor, it's not recommended for production purposes. Because the SecurityPermission attribute bypasses the security check for callers of the Instrumentation method, and then remove the SecurityPermission attribute when the code is ready

Uncomment the following SecurityPermission attribute only when doing Performance Profiling using

Public partial class VisualWebPart1 : WebPart Namespace vwpCustomDropdownList.VisualWebPart1

Once I deploy the wsp and place the webpart on my site and select a dropdown item, it refreshes the page and I get a "Page Cannot Be Displayed" message. The answered solution on the above page doesn't appear to be working for me.