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public void CreateExcel(DataSet ds, string typeid, string FileName)
    {
        HttpResponse resp;
        resp = Page.Response;
        resp.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");
        resp.AppendHeader("Content-Disposition", "attachment;filename=" + FileName);
        string colHeaders = "", ls_item = "";
        int i = 0;

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        DataTable dt = ds.Tables[0];
        DataRow[] myRow = dt.Select("");
        // typeid=="1"ʱµ¼³öΪEXCEL¸ñʽÎļþ£»typeid=="2"ʱµ¼³öΪXML¸ñʽÎļþ
        if (typeid == "1")
        {

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            for (i = 0; i < dt.Columns.Count; i


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