Question

我的代码有问题。我的ViewBag.Message无效，我不知道为什么它没有显示在我的页面上，最终它没有将我重定向到索引并卡在我当前的控制器上。这是我的代码：

控制器

public IActionResult AddPayments()
    {
        try
        {
            var sqlQuery = "INSERT INTO LoanPayments (LoanID, DateOfPayment, AmountOfPayment, Remarks) " +
            "SELECT lc.LoanID, " +
            " CONVERT(DATE, GETDATE(), 101), " +
            " ISNULL(CAST(((lt.InterestRate/100 ) * lc.LoanAmount) + lc.LoanAmount / ((dbo.fnNumberOfYears(CONVERT(VARCHAR(15), LoanDateStart, 101), CONVERT(VARCHAR(15), LoanPaymentDue, 101)) * 12)  * 2) AS DECIMAL(18,2)), 0), " +
            " 'Loan Ledger Created For ' + CAST(GETDATE() AS VARCHAR(50)) " +
            " FROM LoanContract lc " +
            " INNER JOIN LoanType lt ON lt.LoanTypeID = lc.LoanTypeID ";
            _Context.Database.ExecuteSqlCommand(sqlQuery);

            ViewBag.Message = "Has successfully created payments today.";

            return RedirectToAction("Index");
        }
        catch (Exception)
        {

            throw;
        }
    }

    public IActionResult Index()
    {
        return View();
    }

查看

＆＃13;

<h2>Create Payment</h2>
<span>@ViewBag.Message</span>
<a asp-controller="Payment" asp-action="AddPayments" class="btn btn-primary">Secondary</a>

＆＃13;

任何帮助将不胜感激！

Answer 1

使用TempData而不是ViewBag，它会在重定向上持续存在......但正如人们在评论中指出的那样 - 这是一个坏主意，你应该重构代码以避免不得不这样做...... / p>

更好的想法是将消息作为RouteValue传递给索引视图，但这又不是很干净所以如果我是你，我会重构...

编辑（简化示例）：

public IActionResult AddPayments()
    {
        try
        {
            ... // Omitted

            return RedirectToAction("Index", "Home", new { message = "Has successfully created payments today.");
        }
        catch (Exception)
        {    
            throw;
        }
    }

    public IActionResult Index(String message)
    {
        return View((Object) message);
    }

然后在你的索引视图中 - 你做@Model来显示消息。

注意：理想情况下，您可以将其包装在ViewModel中，而不是仅传递裸字符串，但希望这能为您提供正确的想法吗？

ViewBag.Message无法正常工作

1 个答案: