小编jus*_*tus的帖子

我有一个使用Windows身份验证的ASP.NET MVC Intranet站点.它是使用Windows身份验证从ASP.NET MVC的默认项目设置的.如果用户未经过身份验证/匿名,我一直在努力寻找覆盖默认登录弹出窗口的信息.

默认登录提示:

我在互联网上找到的所有东西都有近10年的历史,使用经典的ASP或Web Forms.我找不到的是使用ASP.NET MVC.

我想要做的是,如果用户是匿名/未经过身份验证,则会将用户重定向到"登录"视图.此外,还可以在自动身份验证时注销,并以其他用户身份登录.

我遇到的主要问题是我无法找到在我的项目中进行实际身份验证的位置.我已经检查过App_Start,Global.asax等等.我也找不到如何覆盖它.

我知道我的代码缺乏,但如果有人有一个良好的起点或经验,我会很感激.

对MVC来说很新.尝试提交包含静态DropDownListFor的表单时,我收到以下异常.

The ViewData item that has the key 'CurrentPosition' is of type 'System.String' but must be of type 'IEnumerable<SelectListItem>'.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. 

Exception Details: System.InvalidOperationException: The ViewData item that has the key 'CurrentPosition' is of type 'System.String' but must be of type 'IEnumerable<SelectListItem>'.

Source Error: 


Line 36:            @Html.LabelFor(m => m.CurrentPosition, new { …

我真的希望你们中的一些人喜欢挑战.我有一个产品ID,价格和日期范围的表格,当这些价格活跃时.

+----+-------+---------------------+---------------------+
| Id | Price |      StartDate      |       EndDate       |
+----+-------+---------------------+---------------------+
|  1 |    19 | 2016-12-01 00:00:00 | 2017-12-01 23:59:59 |
|  1 |    18 | 2017-01-01 00:00:00 | 2018-01-12 23:59:59 |
|  1 |    17 | 2017-02-03 00:00:00 | 2017-03-03 23:59:59 |
|  1 |    16 | 2018-01-01 00:00:00 | 2018-03-02 23:59:59 |
|  2 |    15 | 2017-01-01 00:00:00 | 2017-03-05 23:59:59 |
|  2 |    15 | 2017-03-06 00:00:00 | 2017-03-31 23:59:59 |
|  2 …

阅读或修改一些用户创建的.xlsx文件时,我收到以下错误消息:

We found a problem with some content in 'test.xlsx'. Do you want us to try to recover as much as we can? If you trust the source of this workbook, click Yes.

单击是获取另一条消息:

Excel cannot open the file 'test.xlsx' because the file format or file extension is not valid. Verify that the file has not been corrupted and that the file extension matches the format of the file.

此处出现问题.xlsx文件的示例(在放入NPOI之前).

下面是相同的文件,现在损坏的读取和写回后iWorkbook.Write(filestream); 这里.

使用以下代码创建新的.xlsx文件时没有问题:

string newPath = @"C:\MyPath\test.xlsx"; …

我似乎无法掌握如何执行此操作，也无法找到一种简单的方法来对其进行解释……因此，我希望这个简化的示例将是有意义的。

被赋予List <>这样的对象：

public class FlatManyToMany
{
    public string BookTitle { get; set; }
    public int BookPages { get; set; }
    public string ReaderName { get; set; }
    public int ReaderAge { get; set; }
}

var flatManyToMany = new List<FlatManyToMany>();

flatManyToMany.Add(new FlatManyToMany { BookTitle = "How to Do This Double List", BookPages = 105, ReaderName = "Kyle", ReaderAge = 29 });
flatManyToMany.Add(new FlatManyToMany { BookTitle = "How to Do This Double List", BookPages = 105, ReaderName = "Bob", ReaderAge …