一个带checkbox的webcontrol

谢谢大家，无以回报，贴点儿东西吧。

刚才看到下边不少人问给datatable或table添加一个选择框，实际上如果你可以自己做一个webcontrol来实现这个功能，下边是我做的一个带checkbox的webcontrol，由于注释比较全，所以我就不加说明了。

using System;
using System.Collections ;
using System.Web.UI.WebControls ;
using System.Web.UI ;



namespace Bigeagle.Web.WebControls
{
    /// <summary>
    /// <br>自定义控件，带选择框的Table</br>
    /// <br>Author:  Bigeagle@163.net</br>
    /// <br>Date:    2001/10/10</br>
    /// <br>History: 2001/10/10 finished</br>
    /// </summary>
    /// <remarks>
    /// 继承System.Web.UI.WebControls.Table，增加CheckedValue属性，
    /// 用于多项选择的场合，返回被选择的CheckTableRow的值的数组
    /// </remarks>
    public class CheckTable : System.Web.UI.WebControls.Table
    {

        /// <summary>
        /// 是否使用checkbox
        /// </summary>
        /// <remarks>如果为false则不显示checkbox</remarks>
        private bool m_bUseCheck ;


        /// <summary>
        /// ֵ选择数组
        /// </summary>
        /// <remarks>返回选定的CheckTableRow的值</remarks>
        private ArrayList m_arrCheckedValue ;

        /// <summary>
        /// 取得选择数组的属性
        /// </summary>
        /// <remarks>只读属性</remarks>
        public ArrayList CheckedValue
        {
            get
            {
                return this.m_arrCheckedValue ;
            }
        }

        /// <summary>
        /// 存取是否使用checkbox的属性
        /// </summary>
        public bool UseCheck
        {
            get
            {
                return this.m_bUseCheck ;
            }
            set
            {
                this.m_bUseCheck = value ;
            }
        }


        /// <summary>
        /// 构造函数
        /// </summary>
        public CheckTable()
        {
            this.m_arrCheckedValue = new ArrayList() ;
            this.m_bUseCheck = true ;
        }

        /// <summary>
        /// 重载父类方法
        /// </summary>
        /// <param name="e"></param>
        protected override void OnLoad(System.EventArgs e)
        {
            if(this.m_bUseCheck)
            {
                try
                {
                    for(int i = 0 ; i < this.Rows.Count ; i++)
                    {
                        CheckTableRow ctr = (CheckTableRow)this.Rows[i] ;
                        CheckBox cb = (CheckBox)ctr.FindControl(ctr.Value) ;
                        if(cb.Checked)
                        {
                            this.m_arrCheckedValue.Add(ctr.Value) ;
                        }
                    }

                }
                catch(Exception)    //一般出现异常是因为有重复的控件id
                {
                    throw(new Exception("出现重复的控件id")) ;
                }
            }
        }//end method
        

    }//end class
}//end method

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

namespace Bigeagle.Web.WebControls
{
    /// <summary>
    /// <br>自定义控件，带选择框的TableRow</br>
    /// <br>Author:  Bigeagle@163.net</br>
    /// <br>Date:    2001/10/10</br>
    /// <br>History: 2001/10/10 finished</br>
    /// </summary>
    /// <remarks>
    /// 继承System.Web.UI.WebControls.TableRow , 作为自定义控件CheckTable的TableRow，
    /// 与TableRow相比，增加一个值属性和一个CheckBox
    /// </remarks>
    public class CheckTableRow : System.Web.UI.WebControls.TableRow
    {
        /// <summary>
        /// 值
        /// </summary>
        private string m_strValue ;

        /// <summary>
        /// 是否使用checkbox
        /// </summary>
        /// <remarks>如果为false则不显示checkbox</remarks>
        private bool m_bUseCheck ;

        /// <summary>
        /// 存取value的属性
        /// </summary>
        public string Value
        {
            get
            {
                return this.m_strValue ;
            }
            set
            {
                this.m_strValue = value ;
            }
        }

        /// <summary>
        /// 存取是否使用checkbox的属性
        /// </summary>
        public bool UseCheck
        {
            get
            {
                return this.m_bUseCheck ;
            }
            set
            {
                this.m_bUseCheck = value ;
            }
        }


        /// <summary>
        /// 构造函数
        /// </summary>
        public CheckTableRow()
        {
            this.m_strValue = "" ;
            this.m_bUseCheck = true ;

            
        }

        /// <summary>
        /// 重载父类方法
        /// </summary>
        /// <returns>控件结合</returns>
        /// <remarks>增加一个带有CheckBox的td</remarks>
        protected override System.Web.UI.ControlCollection CreateControlCollection()
        {
            ControlCollection cc = base.CreateControlCollection() ;
            if(this.m_bUseCheck)
            {
                TableCell td = new TableCell() ;
                td.BackColor = this.BackColor ;
                td.VerticalAlign = VerticalAlign.Top ;
                CheckBox cb = new CheckBox() ;
                cb.ID = this.m_strValue ;
                td.Controls.Add(cb) ;
                cc.Add(td) ;
            }
            return cc ;
        }//end method


    }//end class
}//end namespace
 

原文转自：http://www.ltesting.net