服务器的挂起执行，显示确认框，根据确认框的响应恢复其余代码

Question

我有一个登录页面。 单击登录按钮后，将执行回发操作，并在从DB（SQL Server）中获取结果后进行身份验证。 如果停用标记为true，则代码执行应停止，并且需要向用户（客户端）显示一个确认框，其余代码应根据来自“确认”框的响应恢复执行。 请帮忙。

C＃代码为：

    if (dt.Rows[0]["IsDeleted"].ToString() == "True")
    {
      Page.ClientScript.RegisterStartupScript(this.GetType(), "CallMyFunction", "Confirm()", true);
                        string confirmValue = Request.Form["confirm_value"];    
                        if (confirmValue == "Yes")
                        {
                            string RegisterQuery = "UPDATE [User] SET IsDeleted=0 where Id = '" + Session["UserId"].ToString() + "'";
                            dbClass.ConnectDataBaseToInsert(RegisterQuery);
                            this.Page.ClientScript.RegisterStartupScript(this.GetType(), "alert", "alert('Your Account has been Reactivated Succesfully!!')", true);
                            boolReturnValue = true;
                        }
                        else
{
                        this.Page.ClientScript.RegisterStartupScript(this.GetType(), "alert", "alert('Your Account remains Deactivated!!')", true);
                        return false;
                    }

JavaScript是：

<script type="text/javascript">
        function Confirm() {
            var confirm_value = document.createElement("INPUT");
            confirm_value.type = "hidden";
            confirm_value.name = "confirm_value";
            if (confirm("Your Account is deactivated. Do you want to Reactivate your account and continue?")) {
                confirm_value.value = "Yes";
            } else {
                confirm_value.value = "No";
            }
            document.forms[0].appendChild(confirm_value);
        }
    </script>