private void afTreeView2_AfterSelect(object sender, TreeViewEventArgs e)
{
AFAttribute selectedAttribute = afTreeView2.AFSelection as AFAttribute;
//Clear data items
lbCurrentVal.Text = "";
lbTagName.Text = "";
lbTimestamp.Text = "";
lbData.Items.Clear();
cbUOM.Items.Clear();
btnInspectTag.Hide();
afDataChart.Series["dataSeries"].Points.Clear();
//Set timerange to default value
afStartDate.Text = "*-12h";
afEndTime.Text = "*";
if (selectedAttribute != null)
{
if (selectedAttribute.DefaultUOM != null)
{
cbUOM.Text = null;
//Fill out the UoM drop-down list
UOMClass selectedUOMClass = selectedAttribute.DefaultUOM.Class;
cbUOM.Items.AddRange(selectedUOMClass.UOMs.ToArray());
cbUOM.SelectedItem = selectedAttribute.DefaultUOM;
}
lbAttribName.Text = selectedAttribute.ToString();
if (selectedAttribute.GetValue() != null) //Check that an attribute has been selected
{
//Set lbCurrentVal to hold the current attribute value and timestamp
lbCurrentVal.Text = selectedAttribute.GetValue().ToString();
lbTimestamp.Text = selectedAttribute.GetValue().Timestamp.ToString();
}
try//Check attribute for association with a PI Tag
{
lbTagName.Text = selectedAttribute.PIPoint.Name.ToString(); //Set lbTagName to hold associated PI tag name
btnInspectTag.Show();
} catch (OSIsoft.AF.PI.PIPointInvalidException) { //No tag association exists
lbTagName.Text = "INVALID PI POINT";
} catch (System.NullReferenceException)
{
lbTagName.Text = "NO PI POINT";
}
bntShowTrend.PerformClick();
}
}