gridviewpageable.cs

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            //str.Append("</script>");

            return str.ToString();
        }

        #endregion

        #region 分页栏

        /// <summary>
        /// 数值按钮
        /// </summary>
        /// <returns></returns>
        private void RenderNumericButton(HtmlTextWriter writer)
        {
            int i = 10;

            //数值按钮当前分页的最后一页索引
            int endindex = this.FirstNumericButton + i;
            //数值按钮分页最后一面的分页数
            int endpage = this.PageViewCount % 10;

            if (endpage != 0 && (this.PageViewIndex > (this.PageViewCount - endpage - 1) &&
                this.PageViewIndex < this.PageViewCount))
            { //索引页在最后一面分页中
                endindex = this.PageViewCount;
            }

            for (int j = this.FirstNumericButton; j < endindex; j++)
            {
                if (j == this.PageViewIndex)
                { //当前页
                    CreateNumericButton(writer, j, false);
                }
                else
                {
                    CreateNumericButton(writer, j, true);
                }
            }
        }

        /// <summary>
        /// 创建数值型按钮
        /// </summary>
        /// <param name="writer">HTML输出流</param>
        /// <param name="text">数值按钮文本</param>
        private void CreateNumericButton(HtmlTextWriter writer, int text, bool show)
        {
            writer.Write("&nbsp;");

            string strtext = string.Format("{0}", text + 1);

            if (show == true)
            { //没被选择
                writer.AddStyleAttribute(HtmlTextWriterStyle.TextDecoration, "none");
                writer.AddAttribute(HtmlTextWriterAttribute.Href, Page.ClientScript.GetPostBackClientHyperlink(this, "pager$" + text.ToString()));
                writer.RenderBeginTag(HtmlTextWriterTag.A);
                writer.Write(strtext);
                writer.RenderEndTag();
            }
            else
            { //当前被选页面
                writer.Write(strtext);
            }
            writer.Write("&nbsp;");
        }

        /// <summary>
        /// 当前页,总页数
        /// </summary>
        /// <returns></returns>
        private string RenderPageNow()
        {
            string templateCell = string.Format(PageNowFormat, PageViewIndex + 1, PageViewCount);
            return templateCell;
        }

        /// <summary>
        /// 每页行数,总行数
        /// </summary>
        /// <returns></returns>
        private string RenderPageRow()
        {
            string templateCell = string.Format(PageRowFormat, PageViewSize, PageRowCount);
            return templateCell;
        }

        /// <summary>
        /// 首页
        /// </summary>
        /// <returns></returns>
        private string RenderFirst()
        {
            string templateCell = string.Empty;

            if (PageButtonType == BUTTON_TYPE.Text)
            {
                if (PageViewIndex <= 0)
                {
                    templateCell = PageFirstFormat;
                }
                else
                {
                    templateCell = string.Format("<a href=\"{0}\" style=\"text-decoration:none\">{1}</a>",
                        Page.ClientScript.GetPostBackClientHyperlink(this, "pager$0"), PageFirstFormat);
                }
            }
            else
            {
                if (PageViewIndex <= 0)
                {
                    templateCell = string.Format("<img border=\"0\" src=\"{0}\" />", ConverImageUrl(PageFirstImage));
                }
                else
                {
                    templateCell = string.Format("<a href=\"{0}\" style=\"text-decoration:none\"><img border=\"0\" src=\"{1}\" /></a>",
                        Page.ClientScript.GetPostBackClientHyperlink(this, "pager$0"), ConverImageUrl(PageFirstImage));
                }
            }
            return templateCell;
        }

        /// <summary>
        /// 末页
        /// </summary>
        /// <returns></returns>
        private string RenderLast()
        {
            string templateCell = string.Empty;

            if (PageButtonType == BUTTON_TYPE.Text)
            {
                if (PageViewIndex >= PageViewCount - 1)
                {
                    templateCell = PageLastFormat;
                }
                else
                {
                    templateCell = string.Format("<a href=\"{0}\" style=\"text-decoration:none\">{1}</a>",
                        Page.ClientScript.GetPostBackClientHyperlink(this, string.Format("pager${0}", PageViewCount - 1)), PageLastFormat);
                }
            }
            else
            {
                if (PageViewIndex >= PageViewCount - 1)
                {
                    templateCell = string.Format("<img border=\"0\" src=\"{0}\" />", ConverImageUrl(PageLastImage));
                }
                else
                {
                    templateCell = string.Format("<a href=\"{0}\" style=\"text-decoration:none\"><img border=\"0\" src=\"{1}\" /></a>",
                        Page.ClientScript.GetPostBackClientHyperlink(this, string.Format("pager${0}", PageViewCount - 1)), ConverImageUrl(PageLastImage));
                }
            }

            return templateCell;
        }

        /// <summary>
        /// 上一页
        /// </summary>
        /// <returns></returns>
        private string RenderBack()
        {
            string templateCell = string.Empty;

            if (PageButtonType == BUTTON_TYPE.Text)
            {
                if (PageViewIndex <= 0)
                { //当前是第1页
                    templateCell = PageBackFormat;
                }
                else
                {
                    templateCell = string.Format("<a href=\"{0}\" style=\"text-decoration:none\">{1}</a>",
                        Page.ClientScript.GetPostBackClientHyperlink(this, string.Format("pager${0}", PageViewIndex - 1)), PageBackFormat);
                }
            }
            else
            {
                if (PageViewIndex <= 0)
                { //当前是第1页
                    templateCell = string.Format("<img border=\"0\" src=\"{0}\" />", ConverImageUrl(PageBackImage));
                }
                else
                {
                    templateCell = string.Format("<a href=\"{0}\" style=\"text-decoration:none\"><img border=\"0\" src=\"{1}\" /></a>",
                        Page.ClientScript.GetPostBackClientHyperlink(this, string.Format("pager${0}", PageViewIndex - 1)), ConverImageUrl(PageBackImage));
                }
            }

            return templateCell;
        }

        /// <summary>
        /// 下一页
        /// </summary>
        /// <returns></returns>
        private string RenderNext()
        {
            string templateCell = string.Empty;

            if (PageButtonType == BUTTON_TYPE.Text)
            {
                if (PageViewIndex >= PageViewCount - 1)
                { //当前是末页
                    templateCell = PageNextFormat;
                }
                else
                {
                    templateCell = string.Format("<a href=\"{0}\" style=\"text-decoration:none\">{1}</a>",
                        Page.ClientScript.GetPostBackClientHyperlink(this, string.Format("pager${0}", PageViewIndex + 1)), PageNextFormat);
                }
            }
            else
            {
                if (PageViewIndex >= PageViewCount - 1)
                { //当前是末页
                    templateCell = string.Format("<img border=\"0\" src=\"{0}\" />", ConverImageUrl(PageNextImage));
                }
                else
                {
                    templateCell = string.Format("<a href=\"{0}\" style=\"text-decoration:none\"><img border=\"0\" src=\"{1}\" /></a>",
                        Page.ClientScript.GetPostBackClientHyperlink(this, string.Format("pager${0}", PageViewIndex + 1)), ConverImageUrl(PageNextImage));
                }
            }

            return templateCell;
        }

        #endregion

        #region 图片路径转换

        private string ResolvePhysicalLocation(string path)
        {
            ISite site1 = this.GetSite();
            if (site1 == null)
            {
                return path;
            }
            IWebApplication application1 = (IWebApplication)site1.GetService(typeof(IWebApplication));
            IProjectItem item1 = application1.GetProjectItemFromUrl(path);
            if (item1 != null)
            {
                return item1.PhysicalPath;
            }
            return path.Replace("~/", application1.RootProjectItem.PhysicalPath);
        }

        private ISite GetSite()
        {
            if (base.Site != null)
            {
                return base.Site;
            }
            for (Control control1 = this.Parent; control1 != null; control1 = control1.Parent)
            {
                if (control1.Site != null)
                {
                    return control1.Site;
                }
            }
            return null;
        }

        private void RenderImage(HtmlTextWriter writer, string imageurl)
        {
            if (this.Page != null)
            {
                string text1 = this.Page.ResolveUrl(imageurl);
                if (base.DesignMode)
                {
                    string text2 = this.ResolvePhysicalLocation(text1);
                    text1 = text2;
                }
                writer.AddAttribute(HtmlTextWriterAttribute.Src, text1);
            }
            writer.RenderBeginTag(HtmlTextWriterTag.Img);
            writer.RenderEndTag();
        }

        private string ConverImageUrl(string url)
        {
            string text1 = this.Page.ResolveUrl(url);
            return this.ResolvePhysicalLocation(text1);
        }

        #endregion

        #region 回发数据和事件

        /// <summary>
        /// 数据回发判断
        /// </summary>
        /// <param name="postDataKey"></param>
        /// <param name="postCollection"></param>
        /// <returns></returns>
        public bool LoadPostData(string postDataKey, System.Collections.Specialized.NameValueCollection postCollection)
        {
            string postedValue = postCollection[postDataKey];
            string presentValue = Text;

            if (presentValue == null || postedValue != presentValue)
            {
                Text = postedValue;
                return true;
            }

            return false;

        }

        /// <summary>
        /// 数据回发激发事件
        /// </summary>
        public void RaisePostDataChangedEvent()
        {
            OnTextChanged(EventArgs.Empty);
        }

        /// <summary>
        /// OnTextChanged事件
        /// </summary>
        /// <param name="eventArgs"></param>
        private void OnTextChanged(EventArgs eventArgs)
        {
            EventHandler textChangedHandler = (EventHandler)Events[EventTextChanged];

            if (textChangedHandler != null)
            {
                textChangedHandler(this, eventArgs);
            }
        }

        /// <summary>
        /// 为TextChanged实现事件属性结构 
        /// </summary>
        public event EventHandler TextChanged
        {
            add
            {
                Events.AddHandler(EventTextChanged, value);
            }
            remove
            {
                Events.RemoveHandler(EventTextChanged, value);
            }
        }

        /// <summary>
        /// 事件回发
        /// </summary>
        /// <param name="eventArgument"></param>
        protected override void RaisePostBackEvent(string eventArgument)
        {
            base.RaisePostBackEvent(eventArgument);

            if (this.AllowPagerable == true)
            {
                string[] str = eventArgument.Split('$');

                if (str[0] == "jump")
                { //跳转按钮
                    Int32 pi;
                    try
                    {
                        string index = (string)ViewState["Text"];
                        pi = Int32.Parse(index);
                        pi -= 1;
                    }
                    catch
                    {
                        pi = PageViewIndex;
                    }

                    if (pi >= 0 && pi <= PageViewCount - 1)
                    {
                        PageViewIndex = pi;
                    }
                    else
                    {
                        PageViewIndex = PageViewCount - 1;
                    }

                    OnChangePageIndex(new EventArgs());
                }
                else if (str[0] == "pager")
                { //文字按钮
                    PageViewIndex = Int32.Parse(str[1]);

                    OnChangePageIndex(new EventArgs());
                }

                if (this.ShowNumericButton == true)
                {
                    if (this.PageViewIndex >= (this.FirstNumericButton + 10))
                    { //向后翻页
                        if (this.PageViewIndex == (this.PageViewCount - 1))
                        {  //末页
                            if ((this.PageViewCount % 10) == 0)
                            { //每面页数一样
                                this.FirstNumericButton = this.PageViewIndex - 10 + 1;
                            }
                            else
                            {
                                this.FirstNumericButton = this.PageViewIndex - (this.PageViewCount % 10) + 1;
                            }
                        }
                        else
                        {
                            this.FirstNumericButton = this.PageViewIndex;
                        }
                    }
                    else if (this.PageViewIndex < this.FirstNumericButton)
                    { //向前翻页
                        if (this.PageViewIndex == 0)
                        {  //首页
                            this.FirstNumericButton = 0;
                        }
                        else
                        {
                            this.FirstNumericButton = this.PageViewIndex - 10 + 1;
                        }
                    }

                    OnChangePageIndex(new EventArgs());
                }
                
                
            }
        }

        /// <summary>
        /// 激发页面索引改变
        /// </summary>
        /// <param name="e"></param>
        private void OnChangePageIndex(EventArgs e)
        {
            ChangePageIndex(this, e);
        }

        #endregion

        #region 输出分页栏

        public override void RenderControl(HtmlTextWriter writer)
        {
            if (BottomPagerRow != null)
            {
                BottomPagerRow.Cells.Clear();
            }