ASP.NET MVC显示SQL Server表数据

Question

On my second hitch on my journey to learning SQL, I've been following a tutorial but for some reason I cannot get my table to display its data on my page. 在学习SQL的第二个关键时刻，我一直在遵循教程，但是由于某种原因，我无法使表在页面上显示其数据。

On the ready(function) part of the code, I have tried using 3 different ways of calling the column names (as they have a space in them, foolish error of mine!) to see which one works, but I have a feeling its the #CBR aspect of the code not contacting the database properly? 在代码的ready（function）部分，我尝试使用3种不同的方式来调用列名（因为它们中有空格，这是我的愚蠢错误！），看哪一种有效，但我有一种感觉代码的#CBR方面未正确联系数据库？ Have I missed something obvious? 我错过了明显的事情吗？

I have pasted the code from my View page and Controller below. 我从下面的“视图”页面和“控制器”中粘贴了代码。

All help kindly received! 所有的帮助都很好！ and Thanks in advance! 并预先感谢！ :) :)

@{
Layout = null;
}

<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width" />
<title>Safes</title>
<link rel="stylesheet" 
href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" 
/>
<link rel="stylesheet" 
href="https://cdn.datatables.net/1.10.13/css/jquery.dataTables.min.css" />
<link href="~/Content/themes/base/jquery-ui.min.css" rel="stylesheet" />
</head>
<body>
<div style="width:90%; margin:0 auto">
    <table id="CBR">
        <thead>
            <tr>
                <th>Safe ID</th>
                <th>Department ID</th>
                <th>Safe Owner ID</th>
            </tr>
        </thead>       
    </table>
</div>

<script src="~/Scripts/jquery-3.1.1.min.js"></script>
<script src="~/Scripts/jquery.validate.min.js"></script>
<script src="~/Scripts/jquery.validate.unobtrusive.min.js"></script>
<script 
src="https://cdn.datatables.net/1.10.13/js/jquery.dataTables.min.js"> 
</script>
<script src="~/Scripts/jquery-ui-1.12.1.min.js"></script>

<script>
    $(document).ready(function () {
        var otable = $('#CBR').DataTable({
            "ajax": {
                "url": '/home/GetSafe',
                "type": "get",
                "datatype": "json"
            },
            "columns": [
                { "data": "Safe ID", "autoWidth": true },
                { "data": "[Department ID]", "autoWidth": true },
                { "data": "User_ID", "autoWidth": true }
            ]
        })
    })
</script>

</body>
</html>

And Controller excerpt: 和控制器摘录：

public ActionResult Safes()
    {
        ViewBag.Message = "Your Safe Page";

        return View();
    }

    public ActionResult GetSafe()
    {

        using (CBREntities dc = new CBREntities())
        {
            var safe = dc.Safes.OrderBy(a => a.User_ID).ToList();
            return Json(new { data = safe }, JsonRequestBehavior.AllowGet);
        }
    }

Answer 1

First, Change your jquery script with this one: 首先，使用以下代码更改您的jquery脚本：

<script src="code.jquery.com/jquery-3.1.1.min.js"></script>

Seems, You don't have that file on your server. 似乎，您的服务器上没有该文件。

Second, the c# exception says, you closed your connection and you can't select new items from db. 其次，c＃异常表明，您关闭了连接，并且无法从数据库中选择新项目。 Try this with connection. 尝试使用连接。 Sometimes this happen when you have virtual property(lazy loading) 有时，当您具有虚拟属性时会发生这种情况（延迟加载）

    var safe = dc.Safes.OrderBy(a => a.User_ID).Select(s=>
new{SafeID=s.SafeID,
DepartmentID=s.DepartmentID, 
User_ID=s.User_ID}
).ToList();

ASP.NET MVC显示SQL Server表数据

问题描述

1 个解决方案

解决方案1
0 2019-03-01 16:58:08

ASP.NET MVC显示SQL Server表数据

问题描述

1 个解决方案

解决方案1 0 2019-03-01 16:58:08

解决方案1
0 2019-03-01 16:58:08