private void btnAddExpression_Click(object sender, RoutedEventArgs e)
{
//get the actual field name from the map here
string fieldName = "";
Model.Expression.fieldType ft = Model.Expression.fieldType.Unknown;
if (cboFieldNames.SelectedValue.ToString() == _FieldNameAliasMap[cboFieldNames.SelectedIndex].value[0])
{
fieldName = _FieldNameAliasMap[cboFieldNames.SelectedIndex].key;
ft = _FieldNameAliasMap[cboFieldNames.SelectedIndex].FieldType;
}
else
{
for (int i = 0; i < cboFieldNames.Items.Count; i++)
{
if (_FieldNameAliasMap[i].value[0] == cboFieldNames.SelectedValue.ToString())
{
fieldName = _FieldNameAliasMap[i].key;
ft = _FieldNameAliasMap[i].FieldType;
}
}
}
string op = cboOperators.SelectedValue as string;
string value = txtSimpleExpression.Text;
bool validValue = validateValue(ft, value);
if (validValue)
{
Model.Expression exp = new Model.Expression(fieldName, op, value);
foreach (StringItems2 item in FieldNameAliasMap)
{
if (item.key == fieldName)
{
exp.FieldType = item.FieldType;
break;
}
}
if (expressions == null)
{
expressions = new ObservableCollection <Model.Expression>();
lvExpressions.ItemsSource = expressions;
//TODO...may want to clean this up between when the diag is opened and closed
expressions.CollectionChanged += expressions_CollectionChanged;
}
expressions.Add(exp);
if (lvExpressions.Visibility == System.Windows.Visibility.Hidden)
{
lvExpressions.Visibility = System.Windows.Visibility.Visible;
}
}
}
//returns true for any fields that query is supported on for this addin
private bool validateValue(Model.Expression.fieldType ft, string value)
{
switch (ft)
{
case Model.Expression.fieldType.Blob:
MessageBox.Show("Query not supported on BLOB field type.");
return(false);
case Model.Expression.fieldType.Date:
DateTime dt;
if (DateTime.TryParse(value, out dt))
{
return(true);
}
else
{
MessageBox.Show("Cannot add Expression.\nUnable to parse value: " + value + " for Date field type.");
return(false);
}
case Model.Expression.fieldType.Double:
Double d;
if (Double.TryParse(value, out d))
{
return(true);
}
else
{
MessageBox.Show("Cannot add Expression.\nUnable to parse value: " + value + " for Double field type.");
return(false);
}
case Model.Expression.fieldType.GUID:
Guid g;
if (Guid.TryParse(value, out g))
{
return(true);
}
else
{
MessageBox.Show("Cannot add Expression.\nUnable to parse value: " + value + " for GUID field type.");
return(false);
}
case Model.Expression.fieldType.Geometry:
MessageBox.Show("Query not supported on GEOMETRY field type.");
return(false);
case Model.Expression.fieldType.GlobalID:
Guid guid;
if (Guid.TryParse(value, out guid))
{
return(true);
}
else
{
MessageBox.Show("Cannot add Expression.\nUnable to parse value: " + value + " for GlobalID field type.");
return(false);
}
case Model.Expression.fieldType.Integer:
Int32 i;
if (Int32.TryParse(value, out i))
{
return(true);
}
else
{
MessageBox.Show("Cannot add Expression.\nUnable to parse value: " + value + " for Integer field type.");
return(false);
}
case Model.Expression.fieldType.OID:
Int32 oid;
if (Int32.TryParse(value, out oid))
{
return(true);
}
else
{
MessageBox.Show("Cannot add Expression.\nUnable to parse value: " + value + " for OID field type.");
return(false);
}
case Model.Expression.fieldType.Raster:
MessageBox.Show("Query not supported on RASTER field type.");
return(false);
case Model.Expression.fieldType.Single:
Int16 ii;
if (Int16.TryParse(value, out ii))
{
return(true);
}
else
{
MessageBox.Show("Cannot add Expression.\nUnable to parse value: " + value + " for Single Integer field type.");
return(false);
}
case Model.Expression.fieldType.SmallInteger:
Int16 iii;
if (Int16.TryParse(value, out iii))
{
return(true);
}
else
{
return(false);
}
case Model.Expression.fieldType.String:
return(true);
case Model.Expression.fieldType.Unknown:
MessageBox.Show("Query not supported on UNKNOWN field type.");
return(false);
case Model.Expression.fieldType.XML:
MessageBox.Show("Query not supported on XML field type.");
return(false);
default:
return(false);
}
}