protected override void OnPreRender(EventArgs e)
{
base.OnPreRender(e);
SPList TasksList;
List <SPListItem> objNodeCollectionForDisplay = new List <SPListItem>();
SPList objTaskList;
string objLookupColumn = string.Empty;
string Title = string.Empty; string objNodeTitle = string.Empty;
SPQuery objSPQuery;
StringBuilder Query = new StringBuilder();
string[] valueArray = null;
if (!Page.IsPostBack)
{
if ((SPContext.Current.FormContext.FormMode == SPControlMode.New) || (SPContext.Current.FormContext.FormMode == SPControlMode.Edit))
{
Microsoft.SharePoint.SPFieldMultiColumnValue values = (Microsoft.SharePoint.SPFieldMultiColumnValue) this.ListItemFieldValue;
if (values != null)
{
valueArray = values.ToString().Split(new string[] { ";#" }, StringSplitOptions.RemoveEmptyEntries);
}
TasksList = SPContext.Current.Web.Lists[objTreeViewControlField.ListName];
SPField spField = SPContext.Current.Web.Lists[objTreeViewControlField.ListName].Fields[objTreeViewControlField.ParentLookup];
if (!string.IsNullOrEmpty(objTreeViewControlField.ListName))
{
objSPQuery = new SPQuery();
Query.Append(String.Format("<Where><IsNull><FieldRef Name='" + spField.InternalName + "' /></IsNull></Where>"));
objSPQuery.Query = Query.ToString();
objItems = TasksList.GetItems(objSPQuery);
if (objItems != null && objItems.Count > 0)
{
foreach (SPListItem objItem in objItems)
{
DisplayColumn = Convert.ToString(objItem[objTreeViewControlField.ValueColumn]);
Title = Convert.ToString(objItem[GlobalConstants.LIST_COLUMN_TITLE]);
CreateTree(Title, valueArray, null, DisplayColumn);
}
}
}
}
else
{
objLookupColumn = objTreeViewControlField.ParentLookup;
if (this.ListItemFieldValue != null)
{
objTaskList = SPContext.Current.Web.Lists[objTreeViewControlField.ListName];
if (objTaskList != null)
{
valueArray = this.ListItemFieldValue.ToString().Split(new string[] { ";#" }, StringSplitOptions.RemoveEmptyEntries);
if (this.ControlMode == SPControlMode.Display)
{
objNodeCollectionForDisplay = CreateNodeCollectionForDisplay(valueArray);
}
List <SPListItem> results = (from SPListItem item in objNodeCollectionForDisplay
where (new SPFieldLookupValue(Convert.ToString(item[objTreeViewControlField.ParentLookup])).LookupValue == null)
orderby item.ID
select item).ToList();
foreach (SPListItem objLstItem in results)
{
CreateTree(objLstItem[GlobalConstants.LIST_COLUMN_TITLE].ToString(), null, objNodeCollectionForDisplay, objLstItem[objTreeViewControlField.ValueColumn].ToString());
}
// objTreeView.RenderControl(output);
}
}
}
}
}
/// <summary>
/// Represents the method that handles the System.Web.UI.Control.PreRender event
/// of a Microsoft.SharePoint.WebControls.FieldMetadata object.
/// </summary>
/// <param name="e">An System.EventArgs that contains the event data.</param>
protected override void OnPreRender(EventArgs e)
{
base.OnPreRender(e);
SPList TasksList;
List <SPListItem> objNodeCollectionForDisplay = new List <SPListItem>();
SPList objTaskList;
string objLookupColumn = string.Empty;
string Title = string.Empty; string objNodeTitle = string.Empty;
SPQuery objSPQuery;
StringBuilder Query = new StringBuilder();
string[] valueArray = null;
SPField spField;
if (!Page.IsPostBack)
{
try
{
lblExptnMsg.Text = string.Empty;;
if ((SPContext.Current.FormContext.FormMode == SPControlMode.New) || (SPContext.Current.FormContext.FormMode == SPControlMode.Edit))
{
Microsoft.SharePoint.SPFieldMultiColumnValue objMultiColumnValues = (Microsoft.SharePoint.SPFieldMultiColumnValue) this.ListItemFieldValue;
if (objMultiColumnValues != null)
{
valueArray = objMultiColumnValues.ToString().Split(new string[] { GlobalConstants.VALUE_SEPARATOR }, StringSplitOptions.RemoveEmptyEntries);
}
TasksList = SPContext.Current.Web.Lists[objTreeViewControlField.ListName];
spField = SPContext.Current.Web.Lists[objTreeViewControlField.ListName].Fields[objTreeViewControlField.ParentLookup];
if (!string.IsNullOrEmpty(objTreeViewControlField.ListName))
{
objSPQuery = new SPQuery();
Query.Append(String.Format(GlobalConstants.DYNAMIC_CAML_QUERY, spField.InternalName));
objSPQuery.Query = Query.ToString();
objItems = TasksList.GetItems(objSPQuery);
if (objItems != null && objItems.Count > 0)
{
foreach (SPListItem objItem in objItems)
{
DisplayColumn = Convert.ToString(objItem[objTreeViewControlField.ValueColumn]);
Title = Convert.ToString(objItem[GlobalConstants.LIST_COLUMN_TITLE]);
CreateTree(Title, valueArray, null, DisplayColumn, objItem[objTreeViewControlField.KeyColumn].ToString());
}
}
}
}
else
{
objLookupColumn = objTreeViewControlField.ParentLookup;
if (this.ListItemFieldValue != null)
{
objTaskList = SPContext.Current.Web.Lists[objTreeViewControlField.ListName];
if (objTaskList != null)
{
valueArray = this.ListItemFieldValue.ToString().Split(new string[] { GlobalConstants.VALUE_SEPARATOR }, StringSplitOptions.RemoveEmptyEntries);
if (this.ControlMode == SPControlMode.Display)
{
objNodeCollectionForDisplay = CreateNodeCollectionForDisplay(valueArray);
}
List <SPListItem> results = (from SPListItem item in objNodeCollectionForDisplay
where (new SPFieldLookupValue(Convert.ToString(item[objTreeViewControlField.ParentLookup])).LookupValue == null)
orderby item.ID
select item).ToList();
foreach (SPListItem objLstItem in results)
{
CreateTree(objLstItem[GlobalConstants.LIST_COLUMN_TITLE].ToString(), null, objNodeCollectionForDisplay, objLstItem[objTreeViewControlField.ValueColumn].ToString(), objLstItem[objTreeViewControlField.KeyColumn].ToString());
}
}
}
}
}
catch (Exception ex)
{
if (string.IsNullOrEmpty(Convert.ToString(ex.InnerException)))
{
lblExptnMsg.Text = ex.Message;
}
else
{
lblExptnMsg.Text = Convert.ToString(ex.InnerException);
}
}
}
}
