C# Winform 加载等待

c# winform 解决加载数据时间过长时，提供等待界面。 loadWaitting = new PPSLoading(); loadWaitting.Name = "LoadWaitting1"; this.Controls.Add(loadWaitting); this.loadWaitting.Dock = DockStyle.Fill; this.loadWaitting.BringToFront();