hi bro,

i dont know how to convert the file when i am using the javascript send the file by XMLHTTP method. i can get the file but the file format is not the same with the file i sent. thanks for any suggestions ..

<script language="javascript">
var url = "ajax/ajaxFile.aspx";
var binary;
var filename;
var mytext;
var _folder="";

function upload() {
    filename = document.getElementById('myfile').value;
    mytext = document.getElementById('mytext').value;
    document.getElementById('ajaxbutton').disabled = true;

    // request local file read permission
    try {
        netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");
    } catch (e) {
        alert("Permission to read file was denied.");
    }
   
    // open the local file
    var file = Components.classes["@mozilla.org/file/local;1"]
        .createInstance(Components.interfaces.nsILocalFile);
    file.initWithPath( filename );       
    stream = Components.classes["@mozilla.org/network/file-input-stream;1"]
        .createInstance(Components.interfaces.nsIFileInputStream);
    stream.init(file,    0x01, 00004, null);
    var bstream =  Components.classes["@mozilla.org/network/buffered-input-stream;1"]
        .getService();
    bstream.QueryInterface(Components.interfaces.nsIBufferedInputStream);
    bstream.init(stream, 1000);
    bstream.QueryInterface(Components.interfaces.nsIInputStream);
    binary = Components.classes["@mozilla.org/binaryinputstream;1"]
        .createInstance(Components.interfaces.nsIBinaryInputStream);
    binary.setInputStream (stream);

    // start AJAX file upload in 1 second
    window.setTimeout("ajax_upload()", 1000);
}

function ajax_upload() {
    // request more permissions
    try {
        netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");
    } catch (e) {
        alert("Permission to read file was denied.");
    }

    http_request = false;
    http_request = new XMLHttpRequest();
    if (!http_request) {
        alert('Cannot create XMLHTTP instance');
        return false;
    }

    // prepare the MIME POST data
    var boundaryString = 'capitano';
    var boundary = '--' + boundaryString;
    var requestbody = boundary + '\n'
    + 'Content-Disposition: form-data; name="mytext"' + '\n'
    + '\n'
    + mytext + '\n'
    + '\n'
    + boundary + '\n'
    + 'Content-Disposition: form-data; name="pathFile"' + '\n'
    + '\n'
    + _folder + '\n'
    + '\n'
    + boundary + '\n'
    + 'Content-Disposition: form-data; name="myfile"; filename="'
        + filename + '"' + '\n'
    + 'Content-Type: application/octet-stream' + '\n'
    + '\n'
    + escape(binary.readBytes(binary.available()))
    + '\n'
    + boundary;

    document.getElementById('sizespan').innerHTML =
        "requestbody.length=" + requestbody.length;
   
    // do the AJAX request
    http_request.onreadystatechange = requestdone;
    http_request.open('POST', url, true);
    http_request.setRequestHeader("Content-type", "multipart/form-data; \
        boundary=\"" + boundaryString + "\"");
    http_request.setRequestHeader("Connection", "close");
    http_request.setRequestHeader("Content-length", requestbody.length);
    http_request.send(requestbody);

}

function requestdone() {
    if (http_request.readyState == 4) {
        if (http_request.status == 200) {
            result = http_request.responseText;
            document.getElementById('myspan').innerHTML = result;           
        } else {
            alert('There was a problem with the request.');
        }
        document.getElementById('ajaxbutton').disabled = false;
    }
}

</script>

------------------------------------------

and my asp.net code as

 if (Request["pathFile"] != null)
        {
            string strPath = Request["pathFile"].ToString().Trim();
            Response.Write(strPath+"<br/>");
            if (Request.Files.Count > 0)
            {
                try
                {
                    for (int i = 0; i < Request.Files.Count; i++)
                    {

                        int values = Request.Files[i].FileName.LastIndexOf('\\');
                        string filename = Request.Files[i].FileName.Substring(values + 1);
                        String strSavePath = Server.MapPath(ConfigurationManager.AppSettings["NewsImage"]) + "\\" + strPath + "\\" + filename;
                        Response.Write(strSavePath);
                        Request.Files[i].SaveAs(strSavePath)
                        //if (!CheckImageSize(strSavePath, 100, 100))
                        //{
                        //    WebLibs.Globals.ResizeImage(strSavePath, 100, 100);
                        //}
                    }
                }
                catch (Exception objEx)
                {
                    Response.Write(objEx.Message);
                }
            }

 --------------------------------------------------------------

dear Lance,

Your ref is really great but i just wanna know how to convert the file when i receive from client . do u have any ideas thanks for ur responding .  

AFAIK, there is no "magic" way. You would need to read the file and convert it yourself.

NC...

i know there is no magic way, but i try alot of my code but Problem is always troublesome. Just wanna ask , wat is the format file when i recive from sever , i guess it is binary but i use streambinary to convert and nothing happen T_T ...any ideas please.