/// <inheritdoc />
public void CreateCategories(IAttributeSource source, ICancelProgressHandler progressHandler)
{
string fieldName = EditorSettings.FieldName;
if (EditorSettings.ClassificationType == ClassificationType.Custom)
{
return;
}
if (EditorSettings.ClassificationType == ClassificationType.UniqueValues)
{
CreateUniqueCategories(fieldName, source, progressHandler);
}
else
{
if (source.GetColumn(fieldName).DataType == typeof(string))
{
NonNumericField?.Invoke(this, EventArgs.Empty);
return;
}
if (!SufficientValues(fieldName, source, EditorSettings.NumBreaks))
{
CreateUniqueCategories(fieldName, source, progressHandler);
}
else
{
GetValues(source, progressHandler);
CreateBreakCategories();
}
}
AppearsInLegend = true;
LegendText = fieldName;
}
private bool IsValidField(string fieldName)
{
if (fieldName == null)
{
return(false);
}
if (_source != null)
{
return(_source.GetColumn(fieldName) != null);
}
return(_table != null && _table.Columns.Contains(fieldName));
}
private void btnGetUniqueValues_Click(object sender, EventArgs e)
{
// Sorting should be done as the original objects, not as strings.
var lst = new HashSet <object>();
string fieldName = lbxFields.SelectedItem.ToString();
bool useAll = false;
bool isString = true;
if (_attributeSource != null)
{
isString = (_attributeSource.GetColumn(fieldName).DataType == typeof(string));
int numPages = (int)Math.Ceiling((double)_attributeSource.NumRows() / 10000);
for (int page = 0; page < numPages; page++)
{
DataTable table = _attributeSource.GetAttributes(page * 10000, 10000);
foreach (DataRow dr in table.Rows)
{
if (dr[fieldName] is DBNull)
{
continue;
}
if (lst.Contains(dr[fieldName]))
{
continue;
}
lst.Add(dr[fieldName]);
}
if (lst.Count <= 10000 || useAll)
{
continue;
}
if (MessageBox.Show("There are more than 10, 000 unique values... do you wish to show all of them?",
"Large Number of Unique Values", MessageBoxButtons.YesNo) == DialogResult.Yes)
{
useAll = true;
}
else
{
break;
}
}
}
else if (_table != null)
{
isString = (_table.Columns[fieldName].DataType == typeof(string));
foreach (DataRow dr in _table.Rows)
{
if (dr[fieldName] is DBNull)
{
continue;
}
if (lst.Contains(dr[fieldName]))
{
continue;
}
lst.Add(dr[fieldName]);
}
}
var text = new object[lst.Count];
int i = 0;
foreach (var o in lst.OrderBy(_ => _))
{
if (isString)
{
text[i++] = "'" + ((string)o).Replace("'", "''") + "'";
}
else
{
text[i++] = o.ToString();
}
}
lbxUniqueValues.SuspendLayout();
lbxUniqueValues.Items.Clear();
lbxUniqueValues.Items.AddRange(text);
lbxUniqueValues.ResumeLayout();
lbxUniqueValues.Enabled = true;
lbxUniqueValues.BackColor = Color.White;
btnGetUniqueValues.Enabled = false;
}
/// <summary>
/// This checks the type of the specified field whether it's a string field
/// </summary>
private static bool CheckFieldType(string fieldName, IAttributeSource source)
{
return source.GetColumn(fieldName).DataType == typeof(string);
}
/// <inheritdoc />
public void CreateCategories(IAttributeSource source, ICancelProgressHandler progressHandler)
{
string fieldName = EditorSettings.FieldName;
if (EditorSettings.ClassificationType == ClassificationType.Custom) return;
if (EditorSettings.ClassificationType == ClassificationType.UniqueValues)
{
CreateUniqueCategories(fieldName, source, progressHandler);
}
else
{
if (source.GetColumn(fieldName).DataType == typeof(string))
{
//MessageBox.Show(MessageStrings.FieldNotNumeric);
if (NonNumericField != null) NonNumericField(this, EventArgs.Empty);
return;
}
if (!SufficientValues(fieldName, source, EditorSettings.NumBreaks))
{
CreateUniqueCategories(fieldName, source, progressHandler);
}
else
{
GetValues(source, progressHandler);
CreateBreakCategories();
}
}
AppearsInLegend = true;
LegendText = fieldName;
}
/// <summary>
/// This checks the type of the specified field whether it's a string field.
/// </summary>
/// <param name="fieldName">Name of the field that gets checked.</param>
/// <param name="source">Attribute source that contains the field.</param>
/// <returns>True, if the field is of type boolean.</returns>
private static bool CheckFieldType(string fieldName, IAttributeSource source)
{
return(source.GetColumn(fieldName).DataType == typeof(string));
}
