[Asp.Net Forums 2.0]增加Pager控件没有的跳转页功能

增加Pager控件没有的跳转页功能

作者: venjiang    2004年6月14日

Pager类,用于分页, Controls\Utility\Pager.cs

首先增加成员变量:

        /// venjiang:增加跳转页输入文本框

        /// </summary>

        TextBox gotoPage;

        /// <summary>

        /// venjiang:增加跳转按钮

        /// </summary>

        LinkButton gotoButton;

其次增加控件:

/// <summary>

        /// 跳转按钮

        /// </summary>

        void AddGotoButton()

        {

            this.gotoButton=new LinkButton();

            this.gotoButton.ID="GoTo";

            this.gotoButton.Text="Go";

            this.gotoButton.Click += new System.EventHandler(PageIndex_Click);

            Controls.Add(gotoButton);

        }

 

        /// <summary>

        /// 增加跳转页输入框

        /// </summary>

        void AddGotoPage()

        {

            this.gotoPage=new TextBox();

            this.gotoPage.Width=30;

            this.gotoPage.ID="GoToPage";

            //this.gotoPage.Text="3";

            this.gotoPage.TextChanged += new System.EventHandler(PageText_Change);

            //this.gotoPage.EnableViewState=true;

            Controls.Add(gotoPage);

        }

增加跳转页文本框文本改变事件:

    void PageText_Change(Object sender,EventArgs e)

        {

            int i = 1;

            try

            {

                i = Convert.ToInt32(this.gotoPage.Text.Trim().ToString());

               

                if(i < 1)

                {

                    i = 1;

                    this.gotoPage.Text="1";

                }

 

                if(i > CalculateTotalPages())

                {

                    i = CalculateTotalPages();

                    this.gotoPage.Text=i.ToString();

                }

            }

            catch

            {

                this.gotoPage.Text="";

                return;

            }

            this.gotoButton.CommandArgument = (i-1).ToString();

           

        }

增加呈现方法:

        void RenderGotoPage(HtmlTextWriter writer)

        {

            Literal l,m;

 

            l = new Literal();

            l.Text = "&nbsp;&nbsp;";

            l.RenderControl(writer);

            this.gotoPage.RenderControl(writer);

            this.gotoButton.RenderControl(writer);

            m = new Literal();

            m.Text = "&nbsp;";

            m.RenderControl(writer);

        }

 

最后将所创建的方法分别添加到相应用方法中:

在CreateChildControls()方法尾部,增加this.AddGotoPage();this.AddGotoButton();

Render(…)方法尾部,增加this.RenderGotoPage(writer);

 

重新运行程序,分页图如下: