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sqlHelper help = new sqlHelper();
if (ajaxrefresh.a == 1)
{
string sql_str = "select ids,reporter,news,times from newsnba order by ids desc";
DataSet ds = help.ExecuteDataSetSql(sql_str);
int count = ds.Tables[0].Rows.Count;
for (int i = 0; i < count; i++)
{
string ids = ds.Tables[0].Rows[i][0].ToString();
ajaxrefresh.str += ids + ",";

}
gvnews.DataSource = ds;
gvnews.DataBind();
ajaxrefresh.a++;
}
else
{
string idparam = ajaxrefresh.str.Substring(0, (ajaxrefresh.str.Length - 1));
string str = @"select ids,reporter,news,times from newsnba where ids not in ({0}) order by ids desc ";
str = string.Format(str, idparam);
DataSet dss = help.ExecuteDataSetSql(str);
gvnews.DataSource = dss;
gvnews.DataBind();
int counts=dss.Tables[0].Rows.Count;
for(int i=0;i<counts;i++)
{
ajaxrefresh.str+=dss.Tables[0].Rows[i][0].ToString();
}


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public string Login(string name)
{
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