Retrieving list values within custom task form

Question

I've created a custom list (PBE) and attached a workflow which creates a task. When I edit the task, I am in my custom task form (.aspx)

I want to check a value in a field in my orginal custom list (pbe). The url passed to the custom task form has several parameters, but I think list = task list. In ID parameter I can see the original list guid.

Is it possible to retrieve the orginal PBE data through the task list or do I need to edit the url ID field, saying this I dont have a reference to the item itself ?

I'm coding in c# and using Visual Studio.

Alexander · Accepted Answer · 2012-01-04 15:59:32Z

1

You can retrieve item from workflow properties and set IDs of PBE item and list to extended properties of task

taskProperties.ExtendedProperties["ItemId"] = item.ID;
taskProperties.ExtendedProperties["ItemListId"] = item.ParentList.ID;

Then you can retrieve these values in your custom task form like this

Hashtable extendedProperties = SPWorkflowTask.GetExtendedPropertiesAsHashtable(task);
var listId = extendedProperties["ItemListId"];
var itemId = extendedProperties["ItemId"];

You can access to the field like this

var list = web.Lists[listId];
var item = list.GetItemById(itemId);
var fieldValue = item[fieldId];

edited Jan 4, 2012 at 15:59

answered Jan 4, 2012 at 13:29

Alexander

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Hi Thanks for this information, In my Custom Task Form I now have the two variables. listId and itemId. How Can I grab a field in the list with a certain ID ?

Orange Juice Jones
– Orange Juice Jones

2012-01-04 15:35:28 +00:00
Commented Jan 4, 2012 at 15:35
I updated my answer. If you want to get field, not a value of field, you can use list.Fields[fieldId] method.

Alexander
– Alexander

2012-01-04 16:00:55 +00:00
Commented Jan 4, 2012 at 16:00
HI I accessed the fields like this, though it works its more complex, have I done it the long way ? this._sharePointListAttachedTo1 = this._myTeamSite.Lists[new Guid(listId)]; this._listItemObject1 = this._sharePointListAttachedTo1.GetItemById(Convert.ToInt32(itemId)); Label5.Text = Convert.ToString(_listItemObject1["AT pbe entry user"]);

Orange Juice Jones
– Orange Juice Jones

2012-01-04 20:19:18 +00:00
Commented Jan 4, 2012 at 20:19
Wheres a good place to learn about these classes and methods ? Not too keen on the msdn site..

Orange Juice Jones
– Orange Juice Jones

2012-01-04 20:25:09 +00:00
Commented Jan 4, 2012 at 20:25
I know only one site for this. it is a Google.com ;)

Alexander
– Alexander

2012-01-04 20:38:58 +00:00
Commented Jan 4, 2012 at 20:38

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