public override object EditValue(ITypeDescriptorContext context, IServiceProvider provider, object value)
{
_editorService = provider.GetService(typeof(IWindowsFormsEditorService)) as IWindowsFormsEditorService;
if (_editorService == null)
{
return(base.EditValue(context, provider, value));
}
var report = GetReport(context);
if (report == null)
{
return(base.EditValue(context, provider, value));
}
var listBox = new ListBoxEx
{
BorderStyle = BorderStyle.None,
PaintIndicatorSupported = true,
ItemHeight = 20
};
listBox.Click += listBox_Click;
listBox.PaintIndicator += listBox_PaintIndicator;
listBox.Items.Add(EditorText);
_dbFields = new List <FieldInfo>();
_dbFields.AddRange(report.DataSource.DataSourceInfo.ImageFields);
foreach (var dbField in report.DataSource.DataSourceInfo.TextFields)
{
if (dbField.DataType == typeof(string))
{
_dbFields.Add(dbField);
}
}
listBox.Items.AddRange(_dbFields.Select(f => (object)f.Name).ToArray());
var itemsToDisplay = Math.Min(MaxDisplayListBoxItems, listBox.Items.Count);
listBox.Height = itemsToDisplay * listBox.ItemHeight;
if (value != null)
{
listBox.SelectedItem = value.ToString();
}
_editorService.DropDownControl(listBox);
if (listBox.SelectedIndex == 0)
{
value = base.EditValue(context, provider, value);
}
else if (listBox.SelectedIndex > 0)
{
var fieldName = listBox.SelectedItem.ToString();
value = PictureHolder.FromExpression(fieldName);
}
_dbFields = null;
return(value);
}
public void ApplyChanges()
{
if (radioNone.Checked)
{
_pictureHolder = PictureHolder.FromObject(null, null);
}
else if (radioFile.Checked)
{
_pictureHolder = PictureHolder.FromFile(txtFile.Text, C1FlexReport.GetActualBasePath(_report));
}
else if (radioURL.Checked)
{
_pictureHolder = PictureHolder.FromUrl(txtURL.Text, C1FlexReport.GetActualBasePath(_report));
}
else if (radioExpression.Checked)
{
_pictureHolder = PictureHolder.FromExpression(cmbExpression.Expression);
}
}
