/// <summary>
/// Hanlde column selection events from our DataGridView. Columns are selected or deselected
/// by setting the UsageType. Ensure changes are made to the through the managed wrapper (design-time interface)
/// so that changes are persisted or cancelled based on form result.
/// </summary>
/// <param name="sender">DataGridView</param>
/// <param name="e">DataGridViewCellEventArgs</param>
private void dgColumns_CellContentClick(object sender, DataGridViewCellEventArgs e)
{
if (e.ColumnIndex == 0 && e.RowIndex >= 0)
{
// Get current value and flip boolean to get new value
bool newValue = !Convert.ToBoolean(dgColumns.CurrentCell.Value);
// Get the virtual column to work with
IDTSVirtualInputColumn100 virtualColumn = _virtualInput.VirtualInputColumnCollection[e.RowIndex];
try
{
// Set the column UsageType to indicate the column is selected or not
if (newValue)
{
_designTimeComponent.SetUsageType(_input.ID, _virtualInput, virtualColumn.LineageID, DTSUsageType.UT_READWRITE);
}
else
{
_designTimeComponent.SetUsageType(_input.ID, _virtualInput, virtualColumn.LineageID, DTSUsageType.UT_IGNORED);
}
}
catch (Exception ex)
{
// Catch any error from base class SetUsageType here.
// Display simple error message from exception
MessageBox.Show(ex.Message, "Invalid Column", MessageBoxButtons.OK, MessageBoxIcon.Error);
// Rollback UI selection
dgColumns.CancelEdit();
}
}
}