Adding attributes with web service

[Guss]

Hi there

[WebMethod]
    public RadTreeNodeData[] GetManufacturers(RadTreeNodeData node, object context)
    {
        IDictionary<string, object> contextDictionary = (IDictionary<string, object>)context;
        String sql = "";
        String parentname = "";
        if (node.Value == "HardwareType")
        {
            sql = "SELECT 'Manufacturer' as [value], manufacturer as [text], hardwareType as [parentName] from tHardwareCatalog WHERE hardwareType = '" + node.Text + "' GROUP BY hardwareType, manufacturer ORDER BY manufacturer";
        }
        else if (node.Value == "Manufacturer")
        {
            parentname = node.Attributes["parentName"].ToString();
            sql = "SELECT id as [value], model as [text], manufacturer as [parentName] from tHardwareCatalog WHERE hardwareType = '" + parentname +"' AND manufacturer = '" + node.Text + "' ORDER BY model";
        }

        SqlDataAdapter adapter = new SqlDataAdapter(sql, ConfigurationManager.ConnectionStrings["RemoteSqlServerData"].ConnectionString);
        DataTable data = new DataTable();
        adapter.Fill(data);
        List<RadTreeNodeData> result = new List<RadTreeNodeData>();
        foreach (DataRow row in data.Rows)
        {
            RadTreeNodeData itemData = new RadTreeNodeData();
            itemData.Text = row["text"].ToString();
            itemData.Value = row["value"].ToString();
            itemData.Attributes.Add("parantName",row["parentName"].ToString());
            if (row["value"].ToString() == "Manufacturer")
            {
                itemData.ExpandMode = TreeNodeExpandMode.WebService;
            }
            result.Add(itemData);
        }
        return result.ToArray();
    }

When I create nodes with a web service, I also want to add attibutes to the node, so that I can read it some other stage.

It does not seem to work."The given key was not present in the dictionary" Error.

Please advise

[Veselin Vasilev]

Hi Guss,

Please try setting the Attributes of a node in this way:

node.Attributes["attr1"] = "attr1 value from webservice";
node.Attributes["attr2"] = "attr2 value from webservice";

I hope this helps.




Best wishes,
Veselin Vasilev
the Telerik team

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[Guss]

Hi there, its actually the other way round.
The web service to get the attribute from the selected node.

But i've figured it out.

In the web service I get it out of the context object (after making it a dictionary)

 

String hardwaretype = (string)contextDictionary["hardwaretype"];
String useinrefresh = (string)contextDictionary["useinrefresh"];
String refreshgroup = (string)contextDictionary["refreshgroup"];

and in the page, I pass the information into the context object:

function NodePopulatingCatalogId(sender, eventArgs)
{
    var node = eventArgs.get_node(); 
    var context = eventArgs.get_context(); 
    if (node.get_value() == "Manufacturer")
    {
        var parentname = node.get_parent().get_text();  
        context["parentname"] = parentname; 
    }
    var hardwaretype = document.getElementById("<%= hardwaretype.ClientID %>"); 
    var useinrefresh = document.getElementById("<%= useinrefresh.ClientID %>"); 
    var refreshgroup = document.getElementById("<%= refreshgroup.ClientID %>"); 
    context["hardwaretype"] = hardwaretype.value;
    context["useinrefresh"] = useinrefresh.value; 
    context["refreshgroup"] = refreshgroup.value; 
 }