public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
// 设定初始排序参数值
// 错误的属性设置方法:SortExpression、SortDirection均是GridView只读属性,无法直接赋值。
//this.GridView1.SortExpression="id";
//this.GridView1.SortDirection="ASC";
// 正确的属性设置方法
this.GridView1.Attributes.Add("SortExpression", "id");
this.GridView1.Attributes.Add("SortDirection", "ASC");
// 绑定数据源到GridView
this.BindGridView();
}
}
/// <summary>
/// GridView排序事件
/// </summary>
protected void GridView1_Sorting(object sender, GridViewSortEventArgs e)
{
// 从事件参数获取排序数据列
string sortExpression=e.SortExpression.ToString();
// 假定为排序方向为“顺序”
string sortDirection="ASC";
// “ASC”与事件参数获取到的排序方向进行比较,进行GridView排序方向参数的修改
if (sortExpression==this.GridView1.Attributes["SortExpression"])
{
//获得下一次的排序状态
sortDirection=(this.GridView1.Attributes["SortDirection"].ToString()==sortDirection ? "DESC" : "ASC");
}
// 重新设定GridView排序数据列及排序方向
this.GridView1.Attributes["SortExpression"]=sortExpression;
this.GridView1.Attributes["SortDirection"]=sortDirection;
this.BindGridView();
}
/// <summary>
/// 绑定到GridView
/// </summary>
private void BindGridView()
{
// 获取GridView排序数据列及排序方向
string sortExpression=this.GridView1.Attributes["SortExpression"];
string sortDirection=this.GridView1.Attributes["SortDirection"];
// 调用业务数据获取方法
DataTable dtBind=this.getDB();
// 根据GridView排序数据列及排序方向设置显示的默认数据视图
if ((!string.IsNullOrEmpty(sortExpression)) && (!string.IsNullOrEmpty(sortDirection)))
{
dtBind.DefaultView.Sort=string.Format("{0} {1}", sortExpression, sortDirection);
}
// GridView绑定并显示数据
this.GridView1.DataSource=dtBind;
this.GridView1.DataBind();
}
/// <summary>
/// 获取数据源的方法
/// </summary>
/// <returns>数据源</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;
}
}