统一项目按钮外观

统一项目按钮外观

一种最简单的方法就是扩展Button。
这里我们举例用最常用的按钮、Add，Edit、Delete
Add一般是跳转URL，Edit也是跳转URL，Delete一般需要后台处理。
以下是源代码，请大家多多提意见。
   

/**//// <summary>
    /// 
    /// </summary>
    [
     ToolboxBitmap(typeof(TDButton), "WebximumWebControl.TDButton.bmp"),
     Designer(typeof(WebximumWebControl.TDButtonDesigner)),
    ]
    public class TDButton : Button
    {
        /**//// <summary>
        /// 超级链接
        /// </summary>
        public string URL
        {
            get
            {
                if (ViewState["URL"] == null)
                {
                    return string.Empty;
                }
                else
                {
                    return Convert.ToString(ViewState["URL"]);
                }
            }
            set
            {
                ViewState["URL"] = value;
            }
        }
        /**//// <summary>
        /// 
        /// </summary>
        public TDButton()
        {
            this.Width = new Unit(60);
        }

        /**//// <summary>
        /// 
        /// </summary>
        /// <param name="writer"></param>
        protected override void AddAttributesToRender(System.Web.UI.HtmlTextWriter writer)
        {
            base.AddAttributesToRender(writer);
            writer.AddStyleAttribute(HtmlTextWriterStyle.Display, "none");
        }

        private bool _IsParentWindowOpen = false;
        /**//// <summary>
        /// 父窗口打开
        /// </summary>
        public bool IsParentWindowOpen
        {
            get
            {
                return this._IsParentWindowOpen;
            }
            set
            {
                this._IsParentWindowOpen = value;
            }
        }

        /**//// <summary>
        /// 
        /// </summary>
        /// <param name="writer"></param>
        protected override void Render(System.Web.UI.HtmlTextWriter writer)
        {
            if (string.IsNullOrEmpty(this.URL))
            {
                base.Render(writer);
                writer.Write("<a href='JavaScript:' onclick=\"document.getElementById('" + 

this.ClientID + "').click();\">"
                                                        + "<table width='" + Width + "' border='0' 

cellpadding='0' cellspacing='0'>"
                                                          + "<tr>"
                                                          + "<td align='center' valign='middle' 

class='btsearch' style='cursor: pointer; height: 19px;'>"
                                                          + this.Text
                                                                + "</td>"
                                                            + "</tr>"
                                                        + "</table>"
                                                    + "</a>");
            }
            else
            {                
                string strHTML = "<a href='JavaScript:' onclick=\"{0}='" + this.URL + "'\">"
                               + "<table width='" + Width + "' border='0' cellpadding='0' 

cellspacing='0'>"
                                 + "<tr>"
                                 + "<td align='center' valign='middle' class='btsearch' style='cursor: 

pointer; height: 19px;'>"

                                 + this.Text

                                       + "</td>"
                                   + "</tr>"
                               + "</table>"
                           + "</a>";
                if (this.IsParentWindowOpen)
                {
                    writer.Write(string.Format(strHTML, "window.parent.document.location"));
                }
                else
                {
                    writer.Write(string.Format(strHTML, "document.location"));
                }
            }
           
        }
    }

    /**//// <summary>
    /// 
    /// </summary>
    public class TDButtonDesigner : ControlDesigner
    {
        /**//// <summary>
        /// 
        /// </summary>
        /// <returns></returns>
        public override string GetDesignTimeHtml()
        {

            TDButton oTDButton = (TDButton)this.Component;
            return ("<a href='JavaScript:' onclick='document.location='" + oTDButton.URL + "' >"
                                               + "<table width='60' border='0' cellpadding='0' 

cellspacing='0'>"
                                                 + "<tr>"
                                                 + "<td align='center' valign='middle' 

class='btsearch' style='cursor: pointer; height: 19px;'>"
                                                 + oTDButton.Text
                                                       + "</td>"
                                                   + "</tr>"
                                               + "</table>"
                                           + "</a>");
        }
    }