Asp.net core mvc NET内核中的DB视图
我为CRUD设置了一个DB注入的表Asp.net core mvc NET内核中的DB视图,asp.net-core-mvc,asp.net-core-1.0,Asp.net Core Mvc,Asp.net Core 1.0,我为CRUD设置了一个DB注入的表 ID EID Task entrydate Level 1 1 Demographics 2017-02-23 2 2 0 Demographics 2017-02-23 2 3 1 Progress Notes 2017-03-06 2 4 1 Demographics 2017-03-06 3 5 1 Assessments 2
ID EID Task entrydate Level
1 1 Demographics 2017-02-23 2
2 0 Demographics 2017-02-23 2
3 1 Progress Notes 2017-03-06 2
4 1 Demographics 2017-03-06 3
5 1 Assessments 2017-03-06 3
6 1 Assessments 2017-01-25 1
但是,为了以对客户端有意义的方式显示数据,我需要按entrydate在列中列出级别数据
ID EId Task 25 Jan 2017 23 Feb 2017 06 Mar 2017
1 1 Demographics NULL 2 NULL
2 0 Demographics NULL 2 NULL
3 1 Progress Notes NULL NULL 2
4 1 Demographics NULL NULL 3
5 1 Assessments NULL NULL 3
6 1 Assessments 1 NULL NULL
我一直致力于在控制器和视图中使用LINQ在视图中创建正确的表
控制器:
public IActionResult Index(int id)
{
HttpContext.Session.SetInt32("EmployeeID", id);
var model = db.EmployeeTask
.Where(h => h.EmployeeId == id)
.OrderByDescending(h => h.Entrydate);
return View(model);
}
private static List<Dictionary<string, object>> LoadData(string sqlSelect,
params object[] sqlParameters)
{
var table = new List<Dictionary<string, object>>();
using (var ctx = new DBContext())
{
ctx.Database.GetDbConnection();
ctx.Database.OpenConnection();
using (var cmd = ctx.Database.GetDbConnection().CreateCommand())
{
cmd.CommandText = sqlSelect;
foreach (var param in sqlParameters)
cmd.Parameters.Add(param);
using (var reader = cmd.ExecuteReader())
{
while (reader.Read())
{
var row = new Dictionary<string, object>();
for (int i = 0; i < reader.FieldCount; i++)
row[reader.GetName(i)] = reader[i];
table.Add(row);
}
if (table == null)
{
var row = new Dictionary<string, object>();
for (int i = 0; i < 1; i++)
row[reader.GetName(i)] = "None";
table.Add(row);
}
}
}
}
return table;
}
public IActionResult Index(int id, string datestart, string dateend)
{
HttpContext.Session.SetInt32("EmployeeID", id);
if(datestart == null)
{
var setdate = DateTime.Now;
datestart = setdate.AddMonths(-3).ToString();
}
if(dateend == null)
{
dateend = DateTime.Now.ToString();
}
var start = new SqlParameter("@StartDate", datestart);
var end = new SqlParameter("@EndDate", dateend);
var EmpId = new SqlParameter("@Id", id);
var tasks = LoadData("EXECUTE dbo.TaskView @StartDate, @EndDate,
@Id",start,end,EmpId);
ViewBag.start = DateTime.Parse(datestart);
ViewBag.end = DateTime.Parse(dateend);
return View(tasks);
}
查看页面:
<table class="table">
<thead>
<tr>
<th>
@Html.DisplayNameFor(model => model.KeyTask)
</th>
@foreach (var group in Model.GroupBy(item => item.Entrydate))
{
<th>
@group.Key.Date
</th>
}
<th></th>
</tr>
</thead>
<tbody>
@foreach (var group in Model.GroupBy(item => item.KeyTask)) {
<tr>
<td>
@group.Key
</td>
@foreach (var item in group)
{
<td>
@Html.DisplayFor(modelItem => item.Acceptable)
</td>
}
</tr>
}
</tbody>
</table>
@DisplayNameFor(model=>model.KeyTask)
@foreach(Model.GroupBy(item=>item.Entrydate)中的var组)
{
@组键日期
}
@foreach(Model.GroupBy(item=>item.KeyTask)中的var组){
@组键
@foreach(组中的var项目)
{
@DisplayFor(modelItem=>item.Acceptable)
}
}
从我的成绩来看,我几乎达到了目标
我遗漏了一些东西,因为来自acceptance的数据与entrydate列不匹配。我走的是正确的道路,还是我已经走到了LINQ所能走的那么远,需要尝试另一种方法?经过大量的搜索、阅读、尝试和错误,我找到了一种方法来实现这一点 首先,我意识到LINQ表达式不是我需要的方式。我需要单独构建行。由于数据具有动态列,DBSet无法工作。因此,我在SQL中构建了一个Pivot查询
DECLARE @cols NVARCHAR (MAX),
@StartDate date = '03/01/2017',
@EndDate date = '03/20/2017',
@Id nvarchar(10) = 1
SELECT @cols = COALESCE (@cols + ',[' + CONVERT(NVARCHAR, entrydate, 106) +
']',
'[' + CONVERT(NVARCHAR, entrydate, 106) + ']')
FROM (SELECT DISTINCT entrydate
FROM EmployeeTask
WHERE entrydate >= @StartDate AND entrydate <= @EndDate
AND EmployeeId = @Id) PV
ORDER BY entrydate DESC
DECLARE @query NVARCHAR(MAX)
SET @query = '
SELECT * FROM (SELECT KeyTask, acceptable, entrydate
FROM EmployeeTask
WHERE EmployeeId = ('+ @Id +')
Group by KeyTask, acceptable, entrydate) x
PIVOT (SUM(acceptable) FOR entrydate IN (' + @cols + ')) p
'
EXEC SP_EXECUTESQL @query
接下来,我修改了视图:
@model List<Dictionary<string, object>>
@{
ViewData["Title"] = "Employee Tasks";
}
<h2>Employee Tasks</h2>
<div class="panel panel-default">
<div class="panel-heading">Search by dates</div>
<div class="panel-body">
<form asp-controller="EmployeeTasks" asp-action="Index">
<label>Start Date</label>
<input type="date" name="datestart" id="start" value=@ViewBag.start
/>
<label>End Date</label>
<input type="date" name="dateend" id="end" value=@ViewBag.end />
<input type="submit" value="Search" />
</form>
</div>
</div>
<p>
<a asp-action="Create">Add New Employee Task</a>
</p>
@if (Model.FirstOrDefault() != null)
{
<table class="table table-bordered">
@foreach (var row in Model.FirstOrDefault())
{
<th>@row.Key</th>
}
@foreach (var row in Model)
{
<tr>
@foreach (var column in row)
{
<td>@column.Value</td>
}
</tr>
}
</table>
}
<div>
<a asp-controller="Employees" asp-action="Index">Back to Employee
Search</a>
</div>
@型号列表
@{
ViewData[“Title”]=“员工任务”;
}
员工任务
按日期搜索
开始日期
结束日期
如果有人有更简单的方法,请将其作为答案发布,以便我可以尝试,但这在.NET Core 1.1中非常有效。经过多次搜索、阅读、反复尝试,我找到了一种方法来实现这一点
首先,我意识到LINQ表达式不是我需要的方式。我需要单独构建行。由于数据具有动态列,DBSet无法工作。因此,我在SQL中构建了一个Pivot查询
DECLARE @cols NVARCHAR (MAX),
@StartDate date = '03/01/2017',
@EndDate date = '03/20/2017',
@Id nvarchar(10) = 1
SELECT @cols = COALESCE (@cols + ',[' + CONVERT(NVARCHAR, entrydate, 106) +
']',
'[' + CONVERT(NVARCHAR, entrydate, 106) + ']')
FROM (SELECT DISTINCT entrydate
FROM EmployeeTask
WHERE entrydate >= @StartDate AND entrydate <= @EndDate
AND EmployeeId = @Id) PV
ORDER BY entrydate DESC
DECLARE @query NVARCHAR(MAX)
SET @query = '
SELECT * FROM (SELECT KeyTask, acceptable, entrydate
FROM EmployeeTask
WHERE EmployeeId = ('+ @Id +')
Group by KeyTask, acceptable, entrydate) x
PIVOT (SUM(acceptable) FOR entrydate IN (' + @cols + ')) p
'
EXEC SP_EXECUTESQL @query
接下来,我修改了视图:
@model List<Dictionary<string, object>>
@{
ViewData["Title"] = "Employee Tasks";
}
<h2>Employee Tasks</h2>
<div class="panel panel-default">
<div class="panel-heading">Search by dates</div>
<div class="panel-body">
<form asp-controller="EmployeeTasks" asp-action="Index">
<label>Start Date</label>
<input type="date" name="datestart" id="start" value=@ViewBag.start
/>
<label>End Date</label>
<input type="date" name="dateend" id="end" value=@ViewBag.end />
<input type="submit" value="Search" />
</form>
</div>
</div>
<p>
<a asp-action="Create">Add New Employee Task</a>
</p>
@if (Model.FirstOrDefault() != null)
{
<table class="table table-bordered">
@foreach (var row in Model.FirstOrDefault())
{
<th>@row.Key</th>
}
@foreach (var row in Model)
{
<tr>
@foreach (var column in row)
{
<td>@column.Value</td>
}
</tr>
}
</table>
}
<div>
<a asp-controller="Employees" asp-action="Index">Back to Employee
Search</a>
</div>
@型号列表
@{
ViewData[“Title”]=“员工任务”;
}
员工任务
按日期搜索
开始日期
结束日期
如果有人有更简单的方法,请将其作为答案发布,以便我可以尝试,但这在.NET Core 1.1中非常有效。在Asp.NET Core code first方法中有更好的处理方法,因为您只需要在Sql server中创建相应的视图,如
CREATE VIEW VIEWNAME AS SELECT ENTRYDATE,COL1,COL2 FROM TABLES GROUP BY ENTRYDATE
然后,您只需要在web应用程序中创建一个与VIEWNAME同名的ViewModel类,然后需要在dbcontext类中调用这一行
public DbQuery<VIEWNAME> VIEWNAME { get; set; }
就是这样…干杯在Asp.Net核心代码优先的方法中有一种更好的处理方法,因为您只需要在Sql server中创建相应的视图,如
CREATE VIEW VIEWNAME AS SELECT ENTRYDATE,COL1,COL2 FROM TABLES GROUP BY ENTRYDATE
然后,您只需要在web应用程序中创建一个与VIEWNAME同名的ViewModel类,然后需要在dbcontext类中调用这一行
public DbQuery<VIEWNAME> VIEWNAME { get; set; }
就是这样……干杯你的分组结果在列和正文中是不同的,这意味着你不是在处理同一个分组结果,而这些分组结果应该在EntryDate
@JS_GodBlessAll:将数字与行中的日期对齐,但行应该是任务。我认为这里最大的问题是,对于某些日期不可接受的任务,没有真正的空或零作为占位符。我试着一行一行地构建,但是由于日期列是动态的,所以我无法构建一个能够准确反映我需要捕获的内容的模型。我还尝试了使用我找到的SQL方法,但我似乎还不能使它工作。您的分组方式s在列和正文中是不同的,这意味着您没有处理相同的分组方式结果,而这些分组方式应该是通过EntryDate
@JS_GodBlessAll:将数字与行中的日期对齐,但行应该是任务。我认为这里最大的问题是,对于某些日期不可接受的任务,没有真正的空或零作为占位符。我试着一行一行地构建,但是由于日期列是动态的,所以我无法构建一个能够准确反映我需要捕获的内容的模型。我还尝试使用我找到的SQL方法,但似乎还不能使它工作。