备注
Contains CSOM expando fields, which correspond to the fields defined in the parent list. The CSOM expando field name is the name of the field defined in the list and the CSOM expando field value is the field value in the list item. The following table defines the mapping between field types and values.
Field Type
CSOM Expando Field Value Type
Meaning
Integer
When its value is undefined it must be CSOM 空引用（无 在 Visual Basic 中）, otherwise it must be CSOM Int32.
Field allows an integer value.
Text
When its value is undefined it must be CSOM 空引用（无 在 Visual Basic 中）, otherwise it must be CSOM String.
Field allows a limited-length string of text.
Note
When its value is undefined it must be CSOM 空引用（无 在 Visual Basic 中）, otherwise it must be CSOM String.
Field allows larger amounts of text.
DateTime
When its value is undefined it must be CSOM 空引用（无 在 Visual Basic 中）, otherwise it must be CSOM DateTime.
Field allows full date and time values, as well as date-only values.
Counter
It must be CSOM Int32.
Counter is a monotonically increasing integer field, and has a unique value in relation to other values that are stored for the field in the list. Counter is used only for the list item identifier field, and not intended for use elsewhere.
Choice
When its value is undefined it must be CSOM 空引用（无 在 Visual Basic 中）, otherwise it must be CSOM String.
Field allows selection from a set of suggested values. A choice field supports a field-level setting which specifies whether free-form values are supported.
Lookup
When its value is undefined it must be CSOM 空引用（无 在 Visual Basic 中）, otherwise it must be CSOM Object.
Field allows a reference to another list item. The field supports specification of a list identifier for a targeted list. An optional site identifier can also be specified, which specifies the site of the list which contains the target of the lookup.
Boolean
When its value is undefined it must be CSOM 空引用（无 在 Visual Basic 中）, otherwise it must be CSOM Boolean.
Field allows a true or false value.
Number
When its value is undefined it must be CSOM null, otherwise it must be CSOM Double.
Field allows a positive or negative number. A number field supports a field level setting used to specify the number of decimal places to display.
Currency
When its value is undefined it must be CSOM 空引用（无 在 Visual Basic 中）, otherwise it must be CSOM Double.
Field allows for currency-related data. The Currency field has a CurrencyLocaleId property which takes a locale identifier of the currency to use.
URL
When its value is undefined it must be CSOM 空引用（无 在 Visual Basic 中）, otherwise it must be CSOM Object.
Field allows a URL and optional description of the URL.
Computed
N/A
Field renders output based on the value of other columns.
Threading
When its value is undefined it must be CSOM 空引用（无 在 Visual Basic 中）, otherwise it must be CSOM String.
Contains data on the threading of items in a discussion board.
Guid
When its value is undefined it must be CSOM 空引用（无 在 Visual Basic 中）, otherwise it must be CSOM GUID.
Specifies that the value of the field is a GUID.
MultiChoice
When its value is undefined it must be CSOM 空引用（无 在 Visual Basic 中）, otherwise it must be CSOM Array.
Field allows one or more values from a set of specified choices. A MultiChoice field can also support free-form values.
GridChoice
When its value is undefined it must be CSOM 空引用（无 在 Visual Basic 中）, otherwise it must be CSOM Array.
Grid choice supports specification of multiple number scales in a list.
Calculated
N/A
Field value is calculated based on the value of other columns.
File
When its value is undefined it must be CSOM 空引用（无 在 Visual Basic 中）, otherwise it must be CSOM String.
Specifies a reference to a file that can be used to retrieve the contents of that file.
Attachments
When its value is undefined it must be CSOM 空引用（无 在 Visual Basic 中）, otherwise it must be CSOM Boolean.
Field describes whether one or more files are associated with the item. See Attachments for more information on attachments. true if a list item has attachments, and false if a list item does not have attachments.
User
When its value is undefined it MUST be CSOM 空引用（无 在 Visual Basic 中）, otherwise it must be CSOM Object.
A lookup to a particular user in the User Info list.
Recurrence
When its value is undefined it MUST be CSOM 空引用（无 在 Visual Basic 中）, otherwise it must be CSOM Boolean.
Specifies whether a field contains a recurrence pattern for an item.
CrossProjectLink
When its value is undefined it MUST be CSOM 空引用（无 在 Visual Basic 中）, otherwise it must be CSOM Boolean.
Field allows a link to a Meeting Workspace site.
ModStat
When its value is undefined it MUST be CSOM 空引用（无 在 Visual Basic 中）, otherwise it must be CSOM int32.
Specifies the current status of a moderation process on the document.
Error
N/A
Specifies errors. Value = 24.
ContentTypeId
When its value is undefined it MUST be CSOM 空引用（无 在 Visual Basic 中）, otherwise it MUST be CSOM Object.
Field contains a content type identifier for an item. ContentTypeId conforms to the structure defined in ContentTypeId.
PageSeparator
N/A
Represents a placeholder for a page separator in a survey list. PageSeparator is only intended to be used with a Survey list.
ThreadIndex
When its value is undefined it must be CSOM 空引用（无 在 Visual Basic 中）, otherwise it must be CSOM String.
Contains a compiled index of threads in a discussion board.
WorkflowStatus
When its value is undefined it must be CSOM 空引用（无 在 Visual Basic 中）, otherwise it must be CSOM Int32.
Contains status on a running workflow for a particular item.
AllDayEvent
When its value is undefined it must be CSOM 空引用（无 在 Visual Basic 中）, otherwise it must be CSOM Boolean.
The AllDayEvent field is only used in conjunction with an Events list. true if the item is an all day event (that is, does not occur during a specific set of hours in a day).
WorkflowEventType
When its value is undefined it must be CSOM 空引用（无 在 Visual Basic 中）, otherwise it must be CSOM Int32.
A description of a type of a historical workflow event. See WorkflowEventType Enumeration for more information.
Facilities
When its value is undefined it must be CSOM 空引用（无 在 Visual Basic 中）, otherwise it must be CSOM Array.
FreeBusy
When its value is undefined it must be CSOM 空引用（无 在 Visual Basic 中）, otherwise it must be CSOM String.
Overbook
When its value is undefined it must be CSOM 空引用（无 在 Visual Basic 中）, otherwise it must be CSOM String.
Confidential
When its value is undefined it must be CSOM 空引用（无 在 Visual Basic 中）, otherwise it must be CSOM Boolean.
WhatsNew
When its value is undefined it must be CSOM 空引用（无 在 Visual Basic 中）, otherwise it must be CSOM Boolean.
DueDate
When its value is undefined it must be CSOM 空引用（无 在 Visual Basic 中）, otherwise it must be CSOM DateTime.
AllowEditing
When its value is undefined it must be CSOM 空引用（无 在 Visual Basic 中）, otherwise it must be CSOM Boolean.
SendTo
When its value is undefined it must be CSOM 空引用（无 在 Visual Basic 中）, otherwise it must be CSOM Array
Confirmations
When its value is undefined it must be CSOM 空引用（无 在 Visual Basic 中）, otherwise it must be CSOM String.
CallTo
When its value is undefined it must be CSOM 空引用（无 在 Visual Basic 中）, otherwise it must be CSOM Array.
CallTime
When its value is undefined it must be CSOM 空引用（无 在 Visual Basic 中）, otherwise it must be CSOM DateTime.
Whereabout
When its value is undefined it must be CSOM 空引用（无 在 Visual Basic 中）, otherwise it must be CSOM String.
From
When its value is undefined it must be CSOM 空引用（无 在 Visual Basic 中）, otherwise it must be CSOM DateTime.
Until
When its value is undefined it must be CSOM 空引用（无 在 Visual Basic 中）, otherwise it must be CSOM DateTime.
ContactInfo
When its value is undefined it must be CSOM 空引用（无 在 Visual Basic 中）, otherwise it must be CSOM String.
示例MSDN ：https://msdn.microsoft.com/zh-cn/library/office/microsoft.sharepoint.client.listitem.aspx
转载于:https://www.cnblogs.com/foreverfendou/p/7638616.html
