Use code To implement Assigned To select multiple persons in the task list

MSDN post history http://social.msdn.microsoft.com/Forums/zh-CN/sharepointwebpartzhchs/thread/1bef6db4-d95a-4bbb-88e3-ea5e89a0f5e5

Q:

By default, only one person or group can be selected in the Assigned To field of the new task item,

However, if I want to select two or more people, this will not work. I need to go to Team Site> Tasks> Settings> Edit Column and select "Yes" for Allow multiple selections.

How to implement it using code: The Allow multiple selections option is Yes, and the default value is No

A:

using (SPSite site = new SPSite("http://moss:5000"))         using (SPWeb web = site.RootWeb)         {             web.AllowUnsafeUpdates = true;             SPList list = web.Lists["Tasks"];             SPFieldLookup userField = list.Fields["Assigned To"] as SPFieldLookup;             userField.AllowMultipleValues = true;             userField.Update();         }

Thank you! The solution Justin Liu provided me!

In addition:

Derived class of Microsoft. SharePoint. SPField:

Microsoft.SharePoint.SPFieldAttachments

Microsoft. SharePoint. SPFieldBoolean

Microsoft. SharePoint. SPFieldCalculated

Microsoft. SharePoint. SPFieldComputed

Microsoft. SharePoint. SPFieldCrossProjectLink

Microsoft. SharePoint. SPFieldDateTime

Microsoft. SharePoint. SPFieldFile

Microsoft. SharePoint. SPFieldLookup

Microsoft. SharePoint. SPFieldMultiChoice

Microsoft. SharePoint. SPFieldMultiColumn

Microsoft. SharePoint. SPFieldMultiLineText

Microsoft. SharePoint. SPFieldNumber

Microsoft. SharePoint. SPFieldPageSeparator

Microsoft. SharePoint. SPFieldRecurrence

Microsoft. SharePoint. SPFieldText

Microsoft. SharePoint. SPFieldUrl

Technorati tags: sharepoint, task, assigned