/// <summary>
/// This describes how to launch the form etc.
/// </summary>
/// <param name="context"></param>
/// <param name="provider"></param>
/// <param name="value"></param>
/// <returns></returns>
public override object EditValue(System.ComponentModel.ITypeDescriptorContext context, IServiceProvider provider, object value)
{
_context = context;
IWindowsFormsEditorService dialogProvider = (IWindowsFormsEditorService)provider.GetService(typeof(IWindowsFormsEditorService));
SQLExpressionDialog dlgExpression = new SQLExpressionDialog();
string original = (string)value;
dlgExpression.Expression = (string)value;
// Try to find the Table
IFeatureCategory category = context.Instance as IFeatureCategory;
if (category != null)
{
IFeatureScheme scheme = category.GetParentItem() as IFeatureScheme;
if (scheme != null)
{
IFeatureLayer layer = scheme.GetParentItem() as IFeatureLayer;
if (layer != null)
{
dlgExpression.Table = layer.DataSet.DataTable;
}
}
else
{
IFeatureLayer layer = category.GetParentItem() as IFeatureLayer;
if (layer != null)
{
dlgExpression.Table = layer.DataSet.DataTable;
}
}
}
dlgExpression.ChangesApplied += dlgExpression_ChangesApplied;
if (dialogProvider.ShowDialog(dlgExpression) != System.Windows.Forms.DialogResult.OK)
{
return original;
}
else
{
return dlgExpression.Expression;
}
}
//User Click the Select Button
private void BtnSelectClick(object sender, EventArgs e)
{
if (_enableUpdate)
{
if (((IndexParam) base.Param).Fs == null || ((IndexParam) base.Param).Fs.DataTable == null) return;
if (((IndexParam) base.Param).Fs.DataTable.Rows.Count < 1) return;
SQLExpressionDialog dlgExpression = new SQLExpressionDialog();
dlgExpression.Table = ((IndexParam) base.Param).Fs.DataTable;
dlgExpression.ShowDialog();
if (dlgExpression.DialogResult == DialogResult.OK)
{
_expression = dlgExpression.Expression;
textBox1.Text = _expression;
base.Status = ToolStatus.Ok;
_click = true;
LightTipText = MessageStrings.FeaturesSelected;
}
}
}