我想使用mvc asp.net在模式弹出窗口中从数据库检索数据。
这是我在控制器中的代码：
string mainconn = ConfigurationManager.ConnectionStrings["MyDbConnection"].ConnectionString;
NpgsqlConnection npgsqlConnection = new NpgsqlConnection(mainconn);
npgsqlConnection.ConnectionString = "Server = localhost; Port = 5432; User Id = xxxxx; Password = xxxxxx; Database = xxxxxx";
npgsqlConnection.Open();
NpgsqlCommand command = new NpgsqlCommand("Select chart_id, chart_name, Chart_Scale from tblchartmaster", npgsqlConnection);
NpgsqlDataReader dataReader = command.ExecuteReader();
DataTable data = new DataTable();
data.Load(dataReader);
return View();
And here is the code in the View:
<body>
@*<asp:button onclick="submit" text="Submit" runat="server" />*@
<input type="button" value="Submit" data-toggle="modal" data-target="#myModal" />
<h2>Map</h2>
<div id="map" class="map"></div>
<!-- The Modal -->
<div class="modal" id="myModal">
<div class="modal-dialog">
<div class="modal-content">
<!-- Modal Header -->
<div class="modal-header">
<h4 class="modal-title">Chart List</h4>
<button type="button" class="close" data-dismiss="modal">×</button>
</div>
<!-- Modal body -->
<div class="modal-body">
<table border="1">
<thead>
<tr>
<td>Select</td>
<td>Chart Name</td>
<td>Chart ID</td>
<td>Chart Scale</td>
</tr>
</thead>
</table>
</script>
</body>
</html>
但是我无法获取数据库数据。我的代码正确吗？请有人帮我找出解决方案。
您没有将数据从控制器发送到视图。假设您已将数据加载到data对象中：
data.Load(dataReader);
return View();
以ViewModel或在ViewBag或ViewData中发送数据：
ViewData：
ViewData["MyData"] = data;
ViewBag：
ViewBag.MyData= data;