private bool TestExpression()
{
var success = false;
MapWinGIS.Table tbl = Shapefile.Table;
if (textQuery.Text == string.Empty)
{
return(true);
}
else
{
object result = null;
string err = string.Empty;
if (tbl.Query(textQuery.Text, ref result, ref err))
{
lblResult.Foreground = Brushes.Green;
int[] arr = result as int[];
if (arr != null)
{
lblResult.Content = "Number of shapes = " + arr.Length.ToString();
// updating shapefile selection
//if (_selectionMode)
//{
// ArrayList options = new ArrayList();
// options.Add("1 - New selection");
// options.Add("2 - Add to selection");
// options.Add("3 - Exclude from selection");
// options.Add("4 - Invert in selection");
// string s = string.Format("Number of shapes = {0}. Choose the way to update selection", arr.Length);
//}
}
success = (arr != null && arr.Length > 0);
}
else
{
if (err.ToLower() == "selection is empty")
{
lblResult.Foreground = Brushes.Blue;
lblResult.Content = err;
}
else
{
lblResult.Foreground = Brushes.Red;
lblResult.Content = err;
}
}
}
return(success);
}
private void ShowValues(int fieldIndex)
{
if (Shapefile.NumFields - 1 < fieldIndex)
{
return;
}
_isString = Shapefile.get_Field(fieldIndex).Type == FieldType.STRING_FIELD;
MapWinGIS.Table tbl = Shapefile.Table;
ShapefileFieldSummary sfs = new ShapefileFieldSummary();
for (int x = 0; x < Shapefile.NumShapes; x++)
{
string rowEntry = "";
if (Shapefile.CellValue[fieldIndex, x] != null)
{
if (_isString)
{
rowEntry = (string)Shapefile.CellValue[fieldIndex, x];
if (rowEntry.Length == 0)
{
rowEntry = "[Blank]";
}
}
else
{
Object obj = Shapefile.CellValue[fieldIndex, x];
rowEntry = obj.ToString();
}
}
if (!sfs.FieldEntriesAndCount.Keys.Contains(rowEntry))
{
sfs.FieldEntriesAndCount.Add(rowEntry, 1);
}
else
{
sfs.FieldEntriesAndCount[rowEntry]++;
}
}
dgvValues.DataContext = sfs.FieldEntriesAndCount.OrderBy(t => t.Key);
dgvValues.Columns.Clear();
dgvValues.Columns.Add(new DataGridTextColumn {
Header = "Cell value", Binding = new Binding("Key")
});
dgvValues.Columns.Add(new DataGridTextColumn {
Header = "Count", Binding = new Binding("Value")
});
}
