/// <summary>
/// 在指定的控件前显示必填项标记
/// </summary>
/// <param name="control"></param>
public void ShowMarker(Control control)
{
LabelControl requriedMarker = null;
if (requiredMarkers.ContainsKey(control))
{
requriedMarker = requiredMarkers[control];
requriedMarker.Visible = true;
}
else
{
requriedMarker = new LabelControl();
requriedMarker.Parent = control.Parent;
requriedMarker.Text = RequiredMarkerText;
requriedMarker.Font = RequiredMarkerFont;
requriedMarker.ForeColor = RequriedMarkerForeColor;
requriedMarker.Location = new Point(control.Left - requriedMarker.Width, control.Top + (control.Height - requriedMarker.Height) / 2);
//避免控件dock属性为fill时，遮挡标记的显示
if (control.Dock == DockStyle.Fill)
{
requriedMarker.Dock = DockStyle.Left;
requriedMarker.SendToBack();
}
requiredMarkers.Add(control, requriedMarker);
}
}
