Hi, I'm trying to scan an image with ImgXTwain in javascript, get the byte array and encode it to base64 for posting. I don't seem to be able to figure out how to get the image into a byte array...

Attached is what I have, I get a 'Type Mismatch' error on the second to last line of the attached script (imgx.Export...)

What am I doing wrong?

Try using ToMemoryFileVariant instead.

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Glenn Chittenden Jr.
Atalasoft Development Team

Thanks for the reply,

I'm trying that now, am still having problems (imgBytes[0] is null, imgBytes.length is null, though alert(imgBytes) shows binary data).

 
Javascript isn't my native tongue so to speak, so the problem is probably on my end at this point.

 

 Are there any examples using ToMemoryFileVariant in javascript?

 

Thanks 

For what it's worth, I have gotten past the initial problem of the array being unusable by following the steps outlined in the knowledge base regarding this.

However, the object used to get at the array is ADODB.Stream which is disabled in IE by default (in Vista at least).

I'm still looking into other ways of accessing the byte array returned from ToMemoryFileVariant...any tips would be greatly appreciated.   

This code seems to do what I need, incase anyone else runs into the same problem I did.

 

 

 

 //convert the image to base64 JPG and prepare for uploading
 var imgx = document.getElementById('scantest_ImgX');
 imgx.Images.Replace(imgx.Support.GetImageFromVariant(Image));
 var imgBytes = imgx.Export.ToMemoryFileVariant(1);
 var xmlDoc = new ActiveXObject("MSXML2.DOMDocument");
 xmlSOAP.loadXML('<?xml version="1.0" encoding="utf-8"?>'+
 '<soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" '+
 'xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"> '+
  '<soap:Body>'+
   '<UploadData xmlns="http://tempuri.org/" >'+
    '<imageData></imageData>'+
   '</UploadData>'+
  '</soap:Body>'+
 '</soap:Envelope>');
 
 // create a new node and set binary content
 var imgNode = xmlSOAP.selectSingleNode("//imageData");
 imgNode.dataType = "bin.base64";
 // store file content into XML node
 imgNode.nodeTypedValue = imgBytes;

 alert(xmlDoc.xml);