1.设置AllowSorting="True"

2.点击GridView的事件onsorting="GridView1_Sorting"

3.利用GridView的Sort属性，页面在ViewState中存储主键和排序，默认是升序，ViewState["OrderDire"] = "ASC";；由于要在分页事件中实现能再排回来，所以再在分页事件中添加ViewState["OrderDire"] = "Desc";

全部代码如下：

public partial class WebForm1 : System.Web.UI.Page

{

string strcon="Data Source=.;Initial Catalog=db_TomeTwo;Integrated Security=True";


protected void Page_Load(object sender, EventArgs e)

{

if (!IsPostBack)

{

ViewState["SortOrder"] = "au_id";

ViewState["OrderDire"] = "ASC";

Bind();


}

}

public void Bind()

{


string strsel="select * from authors";

SqlConnection conn=new SqlConnection (strcon);

SqlCommand com=new SqlCommand (strsel,conn);

SqlDataAdapter sda=new SqlDataAdapter (com);

DataSet ds=new DataSet();

conn.Open();

sda.Fill(ds,"authors");

DataView dw = ds.Tables["authors"].DefaultView;

string strsort = (string)ViewState["SortOrder"] + "," + (string)ViewState["OrderDire"];

//Response.Write(strsort);

dw.Sort = strsort;


//GridView1.DataSource=ds.Tables["authors"];

GridView1.DataSource = dw;

GridView1.DataBind();

conn.Close();


}


protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)

{

GridView1.PageIndex = e.NewPageIndex;

Bind();

}


protected void GridView1_Sorting(object sender, GridViewSortEventArgs e)

{

string spage = e.SortExpression;

if (ViewState["SortOrder"].ToString() == spage)

{

if (ViewState["OrderDire"].ToString() == "Desc")

{

ViewState["OrderDire"] = "ASC";


}

else

{

ViewState["OrderDire"] = "Desc";

}

}

else

{

ViewState["SortOrder"] = e.SortExpression;

}

Bind();

}

}