Question

我有view这样：

<div class="container content-sm">
    @{
        if (Request.IsAuthenticated)
        {
            <a>my profile</a>
        }
        else
        {
            if (Request.Url != null)
            {
                <a>Log in</a>
            }
        }
    }
<div class="row">
    <div class="col-md-9">
        <div class="blog-item">
            some html tags ...
        </div>
        <div>
            <a>Next article</a>
        </div>
        <script type="text/javascript" src="~/Scripts/jquery-1.10.2.min.js"></script>
        <script type="text/javascript" src="~/Scripts/jquery.unobtrusive-ajax.min.js"></script>
        <div class="post-comment hidden-print" id="comment-tool-box">
            @using (Ajax.BeginForm("SaveComment", "News", new { id = Model.Blog.Id }, new AjaxOptions
            {
                HttpMethod = "POST",
                UpdateTargetId = "CommentToolPanel",
                LoadingElementId = "loader",
                OnBegin = "OnBegin",
                OnSuccess = "OnComplete",
                OnFailure = "OnFailure"
            }, new {@class = "my-form"}))
            {
                @Html.AntiForgeryToken()
                @Html.Partial("_PartialComment")
            }
        </div>
    </div>
</div>

和controller：

    [Route("en-us/blogs/explore/show/{year}/{month}/{day}/{id}/{title}")]
    public ActionResult Details(string year, string month, string day, int id)
    {
        try
        {
            var model = _db.Table.ToList();
            return View(model);
        }
        catch (Exception exception)
        {
            _logger.Log(exception);
            return View("Index");
        }
    }

    public string Captcha(int id)
    {
        Response.Cache.SetCacheability(HttpCacheability.Public);
        Response.Cache.SetMaxAge(new TimeSpan(0, 5, 0));
        var obj = new RandomStringGenerator(true, true, true, false)
        {
            MinLowerCaseCharacters = 2,
            MinNumericCharacters = 2,
            MinUpperCaseCharacters = 2
        };
        var input = obj.Generate(7);
        var bmp = new Bitmap(1, 1);
        var graphics = Graphics.FromImage(bmp);
        var font = new Font("Arial", 20f);
        var stringSize = graphics.MeasureString(input, font);
        bmp = new Bitmap
            (
            bmp,
            (int)stringSize.Width,
            (int)stringSize.Height
            );
        graphics = Graphics.FromImage(bmp);
        graphics.DrawString(input, font, Brushes.LightGray, 0, 0);
        font.Dispose();
        graphics.Flush();
        graphics.Dispose();
        var width = bmp.Width;
        var height = bmp.Height;
        var tmp = new Random();
        for (var x = 0; x < width; x++)
        {
            for (var y = 0; y < height; y++)
            {
                var r = tmp.Next(0, 255);
                var g = tmp.Next(0, 255);
                var b = tmp.Next(0, 255);
                bmp.SetPixel(x, y, Color.FromArgb(255, r, g, b));
                y++;
            }
            x++;
        }
        MemoryStream stream;
        using (stream = new MemoryStream())
        {
            bmp.Save(stream, ImageFormat.Png);
        }
        var image = stream.ToArray();

        var imageBase64Data = Convert.ToBase64String(image);
        var imageDataUrl = $"data:image/png;base64,{imageBase64Data}";
        var captchaImage =
            $"<a data-ajax=\"true\" data-ajax-mode=\"replace\" data-ajax-update=\"#capt1\" href=\"/News/Captcha\"><img src='{imageDataUrl}' title=\"Click to reload a new image\" /></a>";

        System.Web.HttpContext.Current.Session["maCaptcha"] = input;

        Session["maCaptcha"] = input;

        return captchaImage;
    }

和_PartialComment查看

<div id="CommentToolPanel" class="hidden-print">
<header>Leave a Comment</header>
<fieldset>
    <section>
            @{
                var opts1 = new AjaxOptions
                {
                    UpdateTargetId = "capt1"
                };
            }
            <span id="capt1">
                @Html.Action("Captcha", "News")
            </span>
            @Html.TextBoxFor(m => m.CaptchaString, new
            {
                id = "captchaImage",
                name = "captchaImage",
                type = "text",
                placeholder = "Captcha code is case censitive."
            })
    </section>
</fieldset>
<footer>
            <button type="submit" class="button" id="btnComment">Submit</button>
</footer>

第一次加载视图时，一切都很好，但是，当我刷新浏览器时，控制器中的Details方法不会触发，但页面内容会更新。
让我们说数据库中有2条记录。第一次，显示记录＃1（到目前为止一直很好），点击下一步，记录＃2也会显示（似乎很好），现在，我尝试再次显示记录＃1，但是{{1} }因此，我的问题是：如果用户登录并浏览页面，然后退出并返回此页面，我的个人资料链接仍然是显示，因为视图没有更新我尝试这些东西：
ASP.NET MVC AjaxForm not updating partial view properly
Update A Div And Partial View Using Ajax.BeginForm On Form Submit
[Walkthrough] Updating Partial Views with Unobtrusive AJAX in MVC 3
View not updating after post
但没有帮助:(

编辑：
当我从_PartialComment视图中删除这部分代码时，问题就解决了： @ Html.Action（＆＃34; Captcha＆＃34;，＆＃34; News＆＃34;） @ Html.TextBoxFor（m =＆gt; m.CaptchaString，new { id =＆＃34; captchaImage＆＃34;， name =＆＃34; captchaImage＆＃34;， type =＆＃34; text＆＃34;，占位符=＆＃34;验证码是案例敏感的。＆＃34; }）

你能否告诉我我的错误是什么，哪些部分是错的？
我该如何解决这个问题？

Answer 1

通过在CreateTable( "dbo.AspNetRoles", c => new { Id = c.Guid(nullable: false, identity: true), Name = c.String(nullable: false, maxLength: 256), }) .PrimaryKey(t => t.Id) .Index(t => t.Name, unique: true, name: "RoleNameIndex");方法中删除这些行，我的问题就解决了！

Captcha

我不知道为什么。

视图不会更新

1 个答案: