从 webmethod 发送错误消息

如何从 webmethod 获取错误消息，我想启动错误。另外，我希望在不同的场合有不同的错误消息。

        $.ajax({
            type: "POST",
            url: "betting.aspx/submitFunction",
            data: JSON.stringify({ results: jsonObj, edit: $("#ctl00_ContentPlaceHolder1_CreateOrEdit").val() }),
            contentType: "application/json; charset=utf-8",
            dataType: "json",
            success: function(arg) { //call successfull
                window.location = "bHistory.aspx";
            },
            error: function(xhr) {
                alert("Error! You need to login, and try again");
                window.location = "login.aspx";
                //error occurred
            }
        });

你可以试试这个：

error: function(msg, status) {
    if (status === "error") {
        var errorMessage = $.parseJSON(msg.responseText);
        alert(errorMessage.Message);
    }
}