Question

I have a code:

Session[“timestamp”] has a byte array in it coming using LInq to Entity

Now when i call this function it throws an error

The web service has a signature like:

[WebMethod]
public  string IsRowChanged(int en_id , byte[] timestamp)
{
}

If I replace byte[] with string everywhere it works.

$.ajax({
    type: "POST",
    url: "UpdateEntityService.asmx/IsRowChanged",
    data: "{ 'en_id':'" + '<%= Request.QueryString["entity_id"] == null ? "1" : Request.QueryString["entity_id"] %>' + "' , 'timestamp': '" + '<%= (Session["timestamp"]) %>' + "'   }",
    contentType: "application/json; charset=utf-8",
    dataType: "json",
    success: function (msg) {

        var result = msg.d;

        if (result == "0") {

            save_valid();

            $.prompt("Data Saved Sucessfully");

        }
        else {

            $.prompt("Data Concurrency Error! Reload the Page.. by pressing F5");

        }

    },
    error: function (XMLHttpRequest, textStatus, errorThrown) {
        alert(textStatus);
        alert(textStatus);
        alert(errorThrown);
    }
});

Any help is appreciated.

Answer 1

You should Base encode binary data and convert it back to byte[] at serverside.

// returns a byte[]
System.Convert.FromBase64String(base64String);
// returns a string
System.Convert.ToBase64String(byteData);