Overview
In previous post we’ve discussed one of the useful features for TaxonomyWebTaggingControl control that allows to specify ID of parent Term for any valid value in control. This could improve user experience in cases when subset of terms should be displayed for selection based on some conditions instead of displaying all terms from term set.
This time we will dig in a little bit to investigate how TaxonomyWebTaggingControl works and illustrate some examples how to access and manipulate TaxonomyWebTaggingControl on the client side.
TaxonomyWebTaggingControl
Before we proceed let me clarify some details about TaxonomyWebTaggingControl control itself.
TaxonomyWebTaggingControl ASP.NET control is a server side wrapper for ScriptForWebTaggingUI client control. One of the main purposes of TaxonomyWebTaggingControl control is to provide the ability to initialize ScriptForWebTaggingUI control by generating parameters on the server side (see table 1).
It is interesting to note here that ScriptForWebTaggingUI was built using Script#. Script# is a development tool that generates JavaScript by compiling C# source code. It means that ScriptForWebTaggingUI was originally created by Microsoft as C# control and this is another great example of using Script# for building real world applications.
ScriptForWebTaggingUI control properties
Table 1. ScriptForWebTaggingUI client control properties .
| InputFieldId | Input field ID that is used for storing term value |
| SspId | IDs of the TermStore objects that this control will validate against |
| GroupId | Gets and sets the IDs of the Group object that this control will validate against |
| TermSetId | Gets the IDs of the TermSet object that this control will validate against |
| AnchorId | Get or set the ID of the Taxonomy whose children will be used to validate against |
| IsMulti | Gets or sets whether this control accepts multiple Term objects |
| AllowFillIn | Gets or sets whether this control will give the option of adding new Term objects if the Open() property is set. |
| WidthCSS | Gets or sets a CSS class that will be applied to the control that should specify a width CSS class. |
| Lcid | Gets or sets the LCID repesenting the language this control will validate against. |
| IsSpanTermSets | Gets and sets whether this control will resolve against all TermSet objects or only the TermSet objects provided. |
| IsSpanTermStores | Gets or sets whether this control will resolve against all TermStore objects or only the TermStore objects provided. |
| IsIgnoreFormatting | Gets or sets whether this control will format valid and invalid Term objects or leave them as plain text. |
| IsIncludeDeprecated | Gets or sets whether this control will resolve against deprecated Term objects. |
| IsIncludeUnavailable | Gets or sets whether this control will resolve against unavailable Term objects. |
| IsIncludeTermSetName | Gets and sets whether this control will resolve against the names of TermSet object names. |
| IsAddTerms | Gets and sets whether this control will try to add unresolved Term objects to the TermSet object. |
| IsIncludePathData | Gets or sets whether this control will include the full GUID path for all Term objects. |
| IsUseCommaAsDelimiter | Gets or sets whether this control will use a comma in addition to a semi-colon as a delimiter. |
| Disable | Gets or sets whether this control is disabled or not |
| ExcludeKeyword | Gets and sets whether this control will resolve against keyword Term object or not |
| WebServiceUrl | Gets and sets the URL of the TaxonomyInternalService that will be used to resolve against |
| FieldName | Gets and sets the value that will be shown in the ToolTip on the client |
| FieldId | Gets and sets the id of field |
| DisplayPickerButton | Gets or sets whether this control will allow browsing with the picker |
Relevant properties for server side TaxonomyWebTaggingControl control are listed here.
Microsoft.SharePoint.Taxonomy client namespace in SharePoint 2010
Table 2. The following table lists classes used for ScriptForWebTaggingUI control
| HighlightResult | |
| ScriptForWebTaggingUI | Represents container for ControlObject |
| ControlObject | Represents control itself |
| Term | Defines Term on the client side |
| ScriptResources | |
| PanelResizer | |
| SelectionMadeEventArgs | |
| SuggestionContainer | |
| SuggestionGroup | |
| Suggestion |
Access and manipulate TaxonomyWebTaggingControl from client side
To manipulate term values in TaxonomyWebTaggingControl control we’ll use Client Object model for Taxonomy listed in table 2, in particular ControlObject capabilities. Below are provided methods for getting and setting values in TaxonomyWebTaggingControl on the client side
To find TaxonomyWebTaggingControl on the client side webTaggingId identifier is used, that corresponds to ContainerId property of control.
Usage
Testing data
For demonstration purposes we’ll use information about countries that has the following structure:
- the first level is the continents
- the second level is the countries
Example 1. Setting TaxonomyWebTaggingControl control value
Example 2. Getting TaxonomyWebTaggingControl control value
In this example is demonstrated how to get term value from
Example 3.Retrieve ScriptForWebTaggingUI control properties
For every instance of TaxonomyWebTaggingControl control placed on page is generated corresponding ScriptForWebTaggingUI control that could be used to retrieving properties as shown below:
