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Old October 2nd, 2004, 06:35 AM
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Default Reading from Excel Files

Hi Guys,

Can Javascript read data from an excel file and then outpuyt the data to a web page?

cheers

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Old October 2nd, 2004, 06:42 AM
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Yes easily, do you want to run the code server-side or client-side?
If server-side then Excel will need to be installed on the server and all users will need a licence. If on the client the users will need Excel installed and your site will need to be in the "Local intranet" or "Trusted sites" zone.

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Old October 2nd, 2004, 06:54 AM
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Hi Joe,

The code will be run client side, we are covered by a site license so no worries there and my site is in the trusted zone.

Thanks
interrupt

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Old October 2nd, 2004, 07:37 AM
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Where is the Excel file, on the server or the client?

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Old October 2nd, 2004, 08:47 AM
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Excel file will be on the server.

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Old October 2nd, 2004, 09:24 AM
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That's the most awkward combination because as far as I know even the latest version cannot open a file by URL, you would need to copy the file to the client first then manipulate it.
First a function to copy files from server to client:
Code:
function saveRemoteFile(From, To)
{
  var oXmlHttp = new ActiveXObject("Msxml2.XmlHttp.4.0");  //Change to version 3 if necessary
  oXmlHttp.open("GET", From, false);
  oXmlHttp.send();
  if (oXmlHttp.status == 200)
  {
    var oStream = new ActiveXObject("Adodb.Stream");
    oStream.type = 1; //Binary
    oStream.open();
    oStream.write(oXmlHttp.responseBody);
    oStream.saveToFile(To, 1 && 2); //Create if needed and overwrite if necessary
    oStream.close();
  }
  else
  {
    throw new Error(oXmlHttp.statusText);  //Needs improving
  }
}
Now when web page needs Excel file you need to call
Code:
saveRemoteFile("http://myserver/myfolder/myfile.xls", "C:\\myfile.xls");
.
Now to work with file, let's display the value in cell A1 on first sheet in a div with the id of divOutput.
Code:
var oExcel = new ActiveXObject("Excel.Application");
var oWB = oExcel.workbooks.open("C:\\myfile.xls");
//oExcel.visible = true;
var oWS = oWB.worksheets(1);
document.getElementById("divOutput").innerText = oWS.Range("A1").value;
oExcel.quit();
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Old October 2nd, 2004, 10:03 AM
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How the hell do you do that???? lol! Thats just the ticket! Thanks Joe.

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Old September 28th, 2006, 09:31 AM
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I am having a problem when reading xls file. I dont want to upload the file on the server. I just want to read the file which the user is going to post.
Note: This file in not on the server and i want the file format as .xls (not .csv)
Using Request.BinaryRead(whatever may be the size of file) it gives me junk characters.

Please Help
Raghav

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Old September 28th, 2006, 09:31 AM
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More details about the problem
I have a web site in which any user(client) can upload the excel file.
The user is going to select file from his machine.
When the user clicks on upload the page(asp page) is posted back.
By using request.binaryread i will get all the contents of the page(asp) including the excel file data contents.
But i am not able to convert it in to readable format.

My main purpose is that i want the Excel data in the recordset.
I have the code to create the recordset when the file resides on the server.
And to do that i will have to upload that file on the server and then read it.
And after reading the file delete the file from the server. But that is not the solution.

By using request.binaryread i am able to read the file by converting it to string. But the same is not working for excel file.

Raghav



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