สอบถามครับ ขอวิธีเขียน CODE รันไอดี พยัญชนะ + ตัวเลขครับ c#

handleHotBeforeKeyDown: function (e) {
    var selectedLast = this.getSelectedLast();
    if (!selectedLast) {
        return;
    }
    var row = selectedLast[0];
    var col = selectedLast[1];
    var celltype = this.getCellMeta(row, col).type;

    // prevent Alpha chars in numeric sheet cells
    if (celltype === "numeric") {
        var evt = e || window.event; // IE support
        var key = evt.charCode || evt.keyCode || 0;

        // check for cut and paste
        var isClipboard = false;
        var ctrlDown = evt.ctrlKey || evt.metaKey; // Mac support

        // Check for Alt+Gr (http://en.wikipedia.org/wiki/AltGr_key)
        if (ctrlDown && evt.altKey) isClipboard = false;
        // Check for ctrl+c, v and x
        else if (ctrlDown && key == 67) isClipboard = true; // c
        else if (ctrlDown && key == 86) isClipboard = true; // v
        else if (ctrlDown && key == 88) isClipboard = true; // x

        // allow backspace, tab, delete, enter, arrows, numbers and keypad numbers
        // ONLY home, end, F5, F12, minus (-), period (.)
        // console.log('Key: ' + key + ' Shift: ' + e.shiftKey + ' Clipboard: ' + isClipboard);
        var isNumeric = ((key == 8) || (key == 9) || (key == 13) || (key == 46)
            || (key == 116) || (key == 123) || (key == 189) || (key == 190)
            || ((key >= 35) && (key <= 40)) || ((key >= 48) && (key <= 57))
            || ((key >= 96) && (key <= 105)));

        if ((!isNumeric && !isClipboard) || e.shiftKey) {
            // prevent alpha characters
            e.stopImmediatePropagation();
            e.preventDefault();
        }
    }
} 

หรือ
|| [8, 9, 13, 46, 116, 123, 189, 190].indexOf(key) > -1