asp.net控件设计时支持(2)-自动格式设置

       继续接着上面的

自动格式设置

先看个图



相信大家都很熟悉吧,我们可以用这个面板很方面的使用预定的样式.我们可以称之为自动格式设置或者自动套用样式.

ControlDesigner类提供了AutoFormats属性,其提供了DesignerAutoFormat类的DesignerAutoFormatCollection集合.我们来看下相关的类.



DesignerAutoFormat 是一个基类，如果你想为你的控件在设计时提供格式化的功能,你可以从此类派生,你必须实现Apply方法,此方法会将相关联的控件设置样式.由于实现比较简单就不再多多了,就直接拿MSDN的例子来看吧. 注意给 IndentLabelDesigner 加上SupportsPreviewControl元数据,这样可以支持预览功能.






  [Designer(typeof(IndentLabelDesigner)),


        ToolboxData("<{0}:IndentLabel Runat=/"server/"></{0}:IndentLabel>")]


    public class IndentLabel : Label




    

{


        [SupportsPreviewControl(true)]


        public class IndentLabelDesigner : LabelDesigner




        

{


            private DesignerAutoFormatCollection _autoFormats = null;




            public override DesignerAutoFormatCollection AutoFormats




            

{


                get




                

{


                    if (_autoFormats == null)




                    

{


                        _autoFormats = new DesignerAutoFormatCollection();


                        _autoFormats.Add(new IndentLabelAutoFormat("MyClassic"));


                        _autoFormats.Add(new IndentLabelAutoFormat("MyBright"));


                        _autoFormats.Add(new IndentLabelAutoFormat("Default"));


                    }


                    return _autoFormats;


                }


            }


        }




        private class IndentLabelAutoFormat : DesignerAutoFormat




        

{


            public IndentLabelAutoFormat(string name)


                : base(name)




            

{ }




            public override void Apply(Control inLabel)




            

{


                if (inLabel is IndentLabel)




                

{


                    IndentLabel ctl = (IndentLabel)inLabel;




                  


                    if (this.Name == "MyClassic")




                    

{


                       


                        ctl.ForeColor = Color.Gray;


                        ctl.BackColor = Color.LightGray;


                        ctl.Font.Size = FontUnit.XSmall;


                        ctl.Font.Name = "Verdana,Geneva,Sans-Serif";


                    }


                    else if (this.Name == "MyBright")




                    

{


                       


                        this.Style.ForeColor = Color.Maroon;


                        this.Style.BackColor = Color.Yellow;


                        this.Style.Font.Size = FontUnit.Medium;


                        ctl.MergeStyle(this.Style);


                    }


                    else




                    

{


                        ctl.ForeColor = Color.Black;


                        ctl.BackColor = Color.Empty;


                        ctl.Font.Size = FontUnit.XSmall;


                    }


                }


            }


        }


    }

这么着效果就实现了,这次比较懒,没好好写,还想打算写别的,就先这样吧.