关于gridview排序问题

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" CellPadding="4" ForeColor="#333333" GridLines="None" AllowSorting="True" OnSorting="GridView1_Sorting">
<FooterStyleBackColor="#507CD1" Font-Bold="True" ForeColor="White"/>
<RowStyle BackColor="#EFF3FB"/>
<Columns>
<asp:BoundFieldDataField="id" HeaderText="ID" SortExpression="id"/>
<asp:BoundFieldDataField="name" HeaderText="NAME" SortExpression="name"/>
<asp:BoundFieldDataField="age" HeaderText="AGE" SortExpression="age"/>
</Columns>
<PagerStyleBackColor="#2461BF" ForeColor="White" HorizontalAlign="Center"/>
<SelectedRowStyleBackColor="#D1DDF1" Font-Bold="True" ForeColor="#333333"/>
<HeaderStyleBackColor="#507CD1" Font-Bold="True" ForeColor="White"/>
<EditRowStyleBackColor="#2461BF"/>
<AlternatingRowStyleBackColor="White"/>
</asp:GridView>
</div>
</form>
</body>
</html>
需要对GridView启用AllowSorting、设置OnSorting事件，对需要排序的列设定SortExpression属性。

// 正确的属性设置方法
            this.GridView1.Attributes.Add("SortExpression","id");
this.GridView1.Attributes.Add("SortDirection","ASC");

/// <summary>
/// GridView排序事件
/// </summary>
    protectedvoid 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();
}

/// 绑定到GridView
/// </summary>
    privatevoid 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();
}

为了减少数据库的链接，这里使用的缓存catche,将生成的ds放到catche里，然后重新绑定gridview。