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    protected void Button1_Click(object sender, EventArgs e)   
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    protected void Button2_Click(object sender, EventArgs e)   
    {   
        /*   
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        string fileName = "asd.txt";//¿Í»§¶Ë±£´æµÄÎļþÃû    
        string filePath = Server.MapPath("DownLoad/aaa.txt");//·¾¶   
  
       


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