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gridview自動排序示例分享
GridView自帶了數據排序功能。在設計視圖下，只能對GridView的排序數據列和排序方向進行靜態設置。在後台程序中，則需要用Attributes方式對GridView的這兩個屬性進行動態設置
示例如下：前台 代碼如下: <%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" > <head runat="server"> <title>無標題頁</title> </head> <body> <form id="form1" runat="server"> <div> <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" CellPadding="4" ForeColor="#333333" GridLines="None" AllowSorting="True" OnSorting="GridView1_Sorting"> <FooterStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" /> <RowStyle BackColor="#EFF3FB" /> <Columns> <asp:BoundField DataField="id" HeaderText="ID" SortExpression="id" /> <asp:BoundField DataField="name" HeaderText="NAME" SortExpression="name" /> <asp:BoundField DataField="age" HeaderText="AGE" SortExpression="age" /> </Columns> <PagerStyle BackColor="#2461BF" ForeColor="White" HorizontalAlign="Center" /> <SelectedRowStyle BackColor="#D1DDF1" Font-Bold="True" ForeColor="#333333" /> <HeaderStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" /> <EditRowStyle BackColor="#2461BF" /> <AlternatingRowStyle BackColor="White" /> </asp:GridView> </div> </form> </body> </html> 前台注意點： 需要對GridView啟用AllowSorting、設置OnSorting事件，對需要排序的列設定SortExpression屬性。 後台 代碼如下: using System; using System.Data; using System.Configuration; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Web.UI.HtmlControls; public partial class _Default : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { // 設定初始排序參數值 // 錯誤的屬性設置方法：SortExpression、SortDirection均是GridView只讀屬性，無法直接賦值。 //this.GridView1.SortExpression = "id"; //this.GridView1.SortDirection = "ASC"; // 正確的屬性設置方法 this.GridView1.Attributes.Add("SortExpression", "id"); this.GridView1.Attributes.Add("SortDirection", "ASC"); // 綁定數據源到GridView this.BindGridView(); } } /// <summary> /// GridView排序事件 /// </summary> protected void GridView1_Sorting(object sender, GridViewSortEventArgs e) { // 從事件參數獲取排序數據列 string sortExpression = e.SortExpression.ToString(); // 假定為排序方向為“順序” string sortDirection = "ASC"; // “ASC”與事件參數獲取到的排序方向進行比較，進行GridView排序方向參數的修改 if (sortExpression == this.GridView1.Attributes["SortExpression"]) { //獲得下一次的排序狀態 sortDirection = (this.GridView1.Attributes["SortDirection"].ToString() == sortDirection ? "DESC" : "ASC"); } // 重新設定GridView排序數據列及排序方向 this.GridView1.Attributes["SortExpression"] = sortExpression; this.GridView1.Attributes["SortDirection"] = sortDirection; this.BindGridView(); } /// <summary> /// 綁定到GridView /// </summary> private void BindGridView() { // 獲取GridView排序數據列及排序方向 string sortExpression = this.GridView1.Attributes["SortExpression"]; string sortDirection = this.GridView1.Attributes["SortDirection"]; // 調用業務數據獲取方法 DataTable dtBind = this.getDB(); // 根據GridView排序數據列及排序方向設置顯示的默認數據視圖 if ((!string.IsNullOrEmpty(sortExpression)) && (!string.IsNullOrEmpty(sortDirection))) { dtBind.DefaultView.Sort = string.Format("{0} {1}", sortExpression, sortDirection); } // GridView綁定並顯示數據 this.GridView1.DataSource = dtBind; this.GridView1.DataBind(); } /// <summary> /// 獲取數據源的方法 /// </summary> /// <returns>數據源</returns> private DataTable getDB() { DataTable dt = new DataTable(); dt.Columns.Add("id"); dt.Columns.Add("name"); dt.Columns.Add("age"); dt.Rows.Add(new object[] { "000001", "hekui", "26" }); dt.Rows.Add(new object[] { "000002", "zhangyu", "26" }); dt.Rows.Add(new object[] { "000003", "zhukundian", "27" }); dt.Rows.Add(new object[] { "000004", "liyang", "25" }); dt.Rows.Add(new object[] { "000005", "caili", "27" }); return dt; &asp.net編程排行
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