ajax檔案下載

利用XMLHTTP下載檔案，和以前的方法一樣，先添加引用－COM－Microsoft Xml 3.0，然後在代碼開始處寫：

using MSXML2;

下面就是主要的代碼：

private void Page_Load(object sender, System.EventArgs e){               string Url = "http://dotnet.aspx.cc/Images/logoSite.gif";        string StringFileName = Url.Substring(Url.LastIndexOf("/") + 1);        string StringFilePath = Request.PhysicalApplicationPath;        if(!StringFilePath.EndsWith("/")) StringFilePath += "/";        MSXML2.XMLHTTP _xmlhttp = new MSXML2.XMLHTTPClass();        _xmlhttp.open("GET",Url,false,null,null);        _xmlhttp.send("");        if( _xmlhttp.readyState == 4 )        {                if(System.IO.File.Exists(StringFilePath + StringFileName))                         System.IO.File.Delete(StringFilePath + StringFileName);                System.IO.FileStream fs = new System.IO.FileStream(StringFilePath + StringFileName, System.IO.FileMode.CreateNew);                System.IO.BinaryWriter w = new System.IO.BinaryWriter(fs);                w.Write((byte[])_xmlhttp.responseBody);                w.Close();                fs.Close();                Response.Write ("檔案已經得到。
");                Response.Write ("查看" + StringFileName + "");        }        else        Response.Write (_xmlhttp.statusText);        Response.End();}

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