ASP.NET2.0自定义控件开发(4) ----给控件添加树状属性

4.给控件添加树状属性 

 

using System;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.ComponentModel;

namespace CustomControls
...{
    /**//// <summary>
    /// Summary description for LabelTextBox
    /// </summary>
    public class LabelTextBox : Control
    ...{
        private string _labelText="LabelText";
        private string _textBoxText = "";
        private SizeInfo _size;

        [Browsable(true),
         Description("获取和设置Label文本"),
         DefaultValue("LabelText"),
         Category("Appearance")
        ]
        public virtual string Title
        ...{
            get ...{ return _labelText; }
            set ...{ _labelText = value; }
        }

        [Browsable(true),
         Description("获取和设置TextBox文本"),
         DefaultValue(""),
         Category("Appearance")
        ]
        public virtual string Text
        ...{
            get ...{ return _textBoxText; }
            set ...{ _textBoxText = value; }
        }

        [Browsable(true),
         Description("获取和设置TextBox的显示方式"),
         DefaultValue(""),
         Category("Appearance")
        ]
        public virtual TextBoxMode TextMode
        ...{
            get
            ...{
                object _textMode = ViewState["TextMode"];
                if (_textMode == null)
                    return TextBoxMode.SingleLine;
                else
                    return (TextBoxMode)_textMode;
            }
            set
            ...{
                ViewState["TextMode"] = value;
            }
        }

        [Browsable(true),
         Description("获取和设置控件的大小"),
         DesignerSerializationVisibility(DesignerSerializationVisibility.Content),
         NotifyParentProperty(true),
         Category("Appearance")
        ]
        public virtual SizeInfo Size
        ...{
            get 
            ...{
                if (_size == null)
                    _size = new SizeInfo();
                return _size;
            }
        }

        protected override void Render(HtmlTextWriter writer)
        ...{
            Page.VerifyRenderingInServerForm(this);

            if (TextMode == TextBoxMode.SingleLine)
            ...{
                writer.Write("<table style='width:180px;height:25px;border-width:0;'>");
                writer.Write("<tr>");
                writer.Write("<td><strong>" + _labelText + "</strong></td>");
                writer.Write("<td><input name='TextBox' id='TextBox' type='text' /></td>");
                writer.Write("</tr>");
                writer.Write("</table>");
            }
            else if (TextMode == TextBoxMode.MultiLine)
            ...{
                writer.Write("<table style='width:180px;height:25px;border-width:0;'>");
                writer.Write("<tr valign='top'>");
                writer.Write("<td><strong>" + _labelText + "</strong></td>");
                writer.Write("<td><textarea name='TextBox' id='TextBox' /></td>");
                writer.Write("</tr>");
                writer.Write("</table>");
            }
            else if (TextMode == TextBoxMode.Password)
            ...{
                writer.Write("<table style='width:180px;height:25px;border-width:0;'>");
                writer.Write("<tr>");
                writer.Write("<td><strong>" + _labelText + "</strong></td>");
                writer.Write("<td><input name='TextBox' id='TextBox' type='password' /></td>");
                writer.Write("</tr>");
                writer.Write("</table>");
            }

            base.Render(writer);
        }
    }

    [TypeConverter(typeof(ExpandableObjectConverter))]
    public class SizeInfo
    ...{
        private int _width;
        private int _height;

        [NotifyParentProperty(true)]
        public int Width
        ...{
            get ...{ return _width; }
            set ...{ _width = value; }
        }

        [NotifyParentProperty(true)]
        public int Height
        ...{
            get ...{ return _height; }
            set ...{ _height = value; }
        }
    }
}