输入字符串的格式不正确（CONVERTING STRING TO DECIMAL）

Question

I am trying to convert the string from *.aspx page:

JaveScript:

function updateOnClick() {

        if (!toIgnore) {
            refNo = document.getElementById("txtRef").value;
            note1000 = removeCommas(document.getElementById("txtNote_1000").value.substring(1));
            note100 = removeCommas(document.getElementById("txtNote_100").value.substring(1));
            note50 = removeCommas(document.getElementById("txtNote_50").value.substring(1));
            note20 = removeCommas(document.getElementById("txtNote_20").value.substring(1));
            note10 = removeCommas(document.getElementById("txtNote_10").value.substring(1));
            note5 = removeCommas(document.getElementById("txtNote_5").value.substring(1));
            note2 = removeCommas(document.getElementById("txtNote_2").value.substring(1));
            note1 = removeCommas(document.getElementById("txtNote_1").value.substring(1));
            coins = removeCommas(document.getElementById("txtCoins").value.substring(1));
            cheque = removeCommas(document.getElementById("txtCheque").value.substring(1));
            outstanding = removeCommas(document.getElementById("txtOutstanding").value.substring(1));
            total = removeCommas(document.getElementById("txtTotal").value.substring(1));
            collectable = removeCommas(document.getElementById("txtCollectable").value.substring(1));
            difference = removeCommas(document.getElementById("txtDifference").value.substring(1));
            collectionDate = document.getElementById(prefix + "txtDate").value;

            iniXmlHttp();

            xmlhttp.onreadystatechange = function () {
                if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
                    responseText = xmlhttp.responseText;

                    if (responseText == "") {
                        loadDailyCollectionTable();
                        document.getElementById("txtRef").focus();
                        document.getElementById("txtRef").select();
                    }

                }
            }

            xmlhttp.open("GET", "DailyCollectionPage.aspx?funcName=updateDailyCollection&RefNo=" + refNo +
            "&collectionDate=" + collectionDate + "&note1000=" + note1000 + "&note100=" + note100 +
            "&note50=" + note50 + "&note20=" + note20 + "&note10=" + note10 + "&note5=" + note5 +
            "&note2=" + note2 + "&note1=" + note1 + "&coins=" + coins + "&cheque=" + cheque +
            "&outstanding=" + outstanding + "&total=" + total + "&collectable=" + collectable + 
            "&difference=" + difference, true);

            xmlhttp.send();
        }
        else
            toIgnore = false;
    }

In Code Behind, I am getting the error in this line when I am trying to convert the string to decimal:

dailyCollection.Notes_1000 = Convert.ToDecimal(Request["note1000"]);

The error is: INPUT STRING WAS NOT IN A CORRECT FORMAT.

Can someone tell me what is wrong in my code. Any help will be very much appreciated!

Answer 1

INPUT STRING WAS NOT IN A CORRECT FORMAT. Are you sure your code always returns value it never returns NULL ? I think when your string is Null or Empty so you are receiving this error try to check for null or empty value first .

  if(!string.IsNullOrEmpty(Convert.Tostring(Request["note1000"]))) 
{
   dailyCollection.Notes_1000 = Convert.ToDecimal(Request["note1000"].ToString());

Answer 2

Have you tried doing this? -

dailyCollection.Notes_1000 = Convert.ToDecimal(Request["note1000"].ToString());

also, you should use Decimal.TryParse instead, which would handle such error conditions.

Eg:

decimal temp;
dailyCollection.Notes_1000  = Decimal.TryParse(Request["note1000"].ToString(),out temp)?temp:0.0M;