Wss3sdk: ellipsis and rendering restrictions in mobile development

In the mobile device viewer, if the text length of a field exceeds web. config ( Local_drive: \ Program Files \ common files \ microsoft shared \ Web Server Extensions \ 12 \ template \ layouts \ mobile Directory), WSS will display the ellipsis. The mobile list item editing form contains a large amount of data. WSS disables the field editing function based on the field type to avoid data loss due to content exceeding the specified limit. In either case, the limitations of mobile rendering determine what content will be displayed on the mobile device.
Figure 1. Text cutting and ellipsis Rendering

You can modify the length limit of the text to change its rendering effect in the mobile view or form. There are two ways to choose from: one is to edit the Web. config file in a text editor, and the other is to modify it by using the type and members in the WSS object model.
Rendering restrictions not only define the text length limit for animation rendering for the mobile control, but also include many other display options for the control. For a detailed list of rendering restrictions and their default values, see the table at the end of this article.
Each display setting is represented by a name-value pair in the <ettings> section of the web. config file. For example, <add key = "mobile_webtitlelimit" value = "20"/>. If the text length limit is set to 0 or not specified, the ellipsis rendering is invalid.
Note: :
To modify these attribute values, you must modify the mobile Web. confg file on all front-end web servers deployed in WSS to make the change take effect.

Configure limits using object models

Rendering restrictions are determined by one of the two methods. One is the default configuration settings in the mobile Web. config file, and the other is to configure web attributes for each website through the object model. Your modifications to Web. config are global Based on the front-end web server layer. However, changes to Web attributes are at the website level and are not inherited from sub-websites.
To allow customization of website-level rendering restrictions, WSS first determines whether rendering restriction parameters are stored in Web attributes. If yes, use the rendering restriction stored by the web property value; otherwise, use the rendering restriction of Web. config. The Web attribute settings of a specific website overwrite the global settings in Web. config.
To modify the rendering restrictions of a mobile control, you can useMicrosoft. Sharepoint. spwebClassPropertiesProperty returns an attribute package (Microsoft. Sharepoint. Utilities. sppropertybag) Object, including all configurations of a given website. The following example shows how to change the rendering limit of the List title of a specified website to 15 characters.
C #

Spweb website = Spcontext. Current. Site. allwebs [ " Website " ];
Sppropertybag propbag = Website. properties;
Propbag [ " Mobile_listtitlelimit " ] =   " 15 " ;
Propbag. Update ();

The above example needs to be referencedMicrosoft. SharePointAndMicrosoft. Sharepoint. UtilitiesNamespace. In additionProgramInsertFormdigestControl.

Rendering restrictions

 

The following table describes the rendering restriction parameters for mobile pages and Their default maximum values.

Name	Description	Value
Basic rendering restrictions
Mobile_basetextlengthlimit	Limits on text Length	255
System rendering restrictions
Mobile_enablelimitationondispform	Specifies the function for rendering ellipsis in a display form.	False
Mobile_fieldnumberlimitforinputform	Maximum number of fields displayed in the new/edit form	100
Mobile_fieldtitlelimit	Field title restrictions (displayed in the form)	20
Mobile_itemtitlelimit	Restrictions on the title of a list item (displayed in the form)	20
Mobile_listtitlelimit	Restrictions on the list title (displayed in the List View)	20
Mobile_viewitemnumberlimit	Maximum number of items displayed in the List View	100
Mobile_viewnumberlimit	View quantity limit in view selector (displayed in List View)	10
Mobile_viewtitlelimit	View title restriction in the view selector (displayed in the List View)	20
Mobile_webtitlelimit		20
Field restrictions
Mobile_attachmentsfieldnumberlimit	Maximum number of attachments displayed	3
Mobile_attachmentsfieldtextlimit	Length limit of a single attachment file name	20
Mobile_calculatedfieldtextlimit	Length limit of calculated value fields	20
Mobile_choicefieldoptionnumberlimit	Number of items displayed by option fields in the new or edit form	10
Mobile_choicefieldoptiontextlimit	Title length limit of an option in the option field	20
Mobile_fieldtextlimitforview	Length limit of a field value in the view	19
Mobile_filefieldtextlimit	The length of the file field is limited.	20
Mobile_lookupfieldoptionnumberlimit	Maximum number of items displayed by a query item field in the new or edit form	10
Mobile_lookupfieldoptiontextlimit	Length limit of an option in the item Field	20
Mobile_multichoice_displaylimitforselectedchoices		10
Mobile_multilinetextfieldtextlimit	Length limit of Multi-Line Text Field Values	256
Mobile_multilookup_displaylimitforselectedlookups		10
Mobile_multiuser_displaylimitforselectedusers		100
Mobile_singlelinetextfieldtextlimit	Length limit of Single-Line Text Field Values	256
Mobile_urlfieldtextlimit	URL field value length limit	20
Mobile_userfieldoptionnumberlimit	Limit on the number of items displayed for user-type fields in the new or edit form	100
Mobile_userfieldoptiontextlimit	The title length limit of an option in the user Field	20

Note::
The unit of character limit in the preceding table is the number of characters, which is the same for both halfwidth and fullwidth characters.