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  protected void Page_Load(object sender, EventArgs e)
    {
            if (!IsPostBack)
        {  this.GridView1.Attributes.Add("SortExpression", "id");
            this.GridView1.Attributes.Add("SortDirection", "ASC");
            this.BindGridView();
        }
    }
    protected void GridView1_Sorting(object sender, GridViewSortEventArgs e)
    {
            string sortExpression = e.SortExpression.ToString();
        // ¼Ù¶¨ÎªÅÅÐò·½ÏòΪ¡°Ë³Ðò¡±
        string sortDirection = "ASC";
        // ¡°ASC¡±Óëʼþ²ÎÊý»ñÈ¡µ½µÄÅÅÐò·½Ïò½øÐбȽϣ¬½øÐÐGridViewÅÅÐò·½Ïò²ÎÊýµÄÐÞ¸Ä
        if (sortExpression == this.GridView1.Attributes["SortExpression"])
        {
            //»ñµÃÏÂÒ»´ÎµÄÅÅÐò״̬
            sortDirection = (this.GridView1.Attributes["SortD


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select cast(convert(numeric(18,2),1275674000000/100000000)as real)
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