ASP.NET2.0自定义控件开发(3) ----给控件添加下拉列表属性

3.给控件添加下拉列表属性

 

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

namespace  CustomControls
... {
    /**//// 

    /// Summary description for LabelTextBox
    /// 

    public class LabelTextBox : Control
    ...{
        private string _labelText="LabelText";
        private string _textBoxText = "";

        [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;
            }
        }

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

            if (TextMode == TextBoxMode.SingleLine)
            ...{
                writer.Write("");
                writer.Write("");
                writer.Write("" + _labelText + "");
                writer.Write("");
                writer.Write("");
                writer.Write("");
            }
            else if (TextMode == TextBoxMode.MultiLine)
            ...{
                writer.Write("");
                writer.Write("");
                writer.Write("" + _labelText + "");
                writer.Write("");
                writer.Write("");
                writer.Write("");
            }
            else if (TextMode == TextBoxMode.Password)
            ...{
                writer.Write("");
                writer.Write("");
                writer.Write("" + _labelText + "");
                writer.Write("");
                writer.Write("");
                writer.Write("");
            }

            base.Render(writer);
        }
    }
}