Javascript 林克上市<；AJAX>；在数据表中使用
我试图执行一个LINQ查询来填充一个AJAX列表，然后返回到视图中的数据表中使用 我以前没有尝试实现AJAX，只是将其放在模型中，并在循环中呈现表中的每一行，这一点就可以实现了。然而，这是令人难以置信的资源要求，并采取了太长的时间来呈现在我的更大的查询页面 所以我尝试实现AJAX，不管LINQ返回空值。我知道我可以正确地获取数据，因为我已经实现了一个测试用例，它返回了一个简单的AJAX小样本，但是由于某种原因，它并没有填充我的数据表 因此，简而言之，我需要：修复我的LINQ列表并使用它填充数据表 这是我的控制器：Javascript 林克上市<；AJAX>；在数据表中使用,javascript,c#,asp.net,ajax,linq,Javascript,C#,Asp.net,Ajax,Linq,我试图执行一个LINQ查询来填充一个AJAX列表，然后返回到视图中的数据表中使用 我以前没有尝试实现AJAX，只是将其放在模型中，并在循环中呈现表中的每一行，这一点就可以实现了。然而，这是令人难以置信的资源要求，并采取了太长的时间来呈现在我的更大的查询页面 所以我尝试实现AJAX，不管LINQ返回空值。我知道我可以正确地获取数据，因为我已经实现了一个测试用例，它返回了一个简单的AJAX小样本，但是由于某种原因，它并没有填充我的数据表 因此，简而言之，我需要：修复我的LINQ列表并使用它填充数据表
public class stockAJAX
{
public int StockId { get; set; }
public string ProductGroup { get; set; }
public string GroupType { get; set; }
public string ItemType { get; set; }
public string Model { get; set; }
public string SerialNo { get; set; }
public string NR { get; set; }
public string Status { get; set; }
public string Description { get; set; }
public string DateArrived { get; set; }
public int? CurrentLocation { get; set; }
public string TerminalId { get; set; }
}
public class TableController : Controller
{
List<stockAJAX> stock = new List<stockAJAX>();
stockAJAX ajaxTemp = new stockAJAX();
static string csv;
[AcceptVerbs(HttpVerbs.Get | HttpVerbs.Post)]
public JsonResult getAJAX(System.Web.Mvc.FormCollection collection)
{
//Recieve Data from the Select Company DropDownList
string selectedList = collection["list"];
//Recieve Data from the Select GroupType DropDownList
string selectedGroupType = collection["grouptype"];
//Recieve Data from the Show All Stock checkbox
string selectedAmount = collection["amount"];
//A list of type <stock> has its value recieved from the function which computes which query to use and then executes it.
stock = returnList(selectedGroupType, selectedList, selectedAmount);
if (stock == null)
{
System.Windows.Forms.MessageBox.Show("NULL AJAX");
stockAJAX stock1 = new stockAJAX();
stock1.StockId = 0;
stock1.ProductGroup = " ";
stock1.GroupType = " ";
stock1.ItemType = " ";
stock1.Model = " ";
stock1.SerialNo = " ";
stock1.NR = " ";
stock1.Status = " ";
stock1.Description = " ";
stock1.DateArrived = " ";
stock1.CurrentLocation = 0;
stock1.TerminalId = " ";
return Json(stock1, JsonRequestBehavior.AllowGet);
}
return Json(stock, JsonRequestBehavior.AllowGet);
}
//Function that grabs the data for the DataTable, and the two DropDownLists, the two DropDownLists are return through ViewData[] and the DataTable data is returned via Model
//Takes three strings which are taken from Form Data
public List<stockAJAX> returnList(string selectedGroupType, string selectedList, string selectedAmount)
{
//List of type <stock> this will contain all of the data to be put into the DataTable
//Namespace utilising the TableEntities connection to the Entity Framework
using (TableEntities context = new TableEntities())
{
//Lists which will contain data for the DropDownLists
IList<SelectListItem> ddl = new List<SelectListItem>();
IList<SelectListItem> ddl2 = new List<SelectListItem>();
//Temp list of strings, used to grab data from the Entity to be placed into the dropdownlists
List<string> stocktemp = null;
//Query for the ProductGroup DropDownList
stocktemp = (from c in context.stocks
select c.ProductGroup
).Distinct().ToList();
foreach (string item in stocktemp) //Places data received in the SelectList as items
{
if (item == selectedList && item != null) //Tests to see if the Item was selected in the last view, if so is set as default
ddl.Add(new SelectListItem() { Text = item, Selected = true });
else if (item != null)
ddl.Add(new SelectListItem() { Text = item });
}
ViewData["list"] = ddl; //PLaces the SelectList in the ViewData[]
//Query for the GroupType DropDownList
stocktemp = (from c in context.stocks
select c.GroupType
).Distinct().ToList();
foreach (string item in stocktemp)//Tests to see if the Item was selected in the last view, if so is set as default
{
if (item == selectedGroupType && item != null)
ddl2.Add(new SelectListItem() { Text = item, Selected = true });
else if (item != null)
ddl2.Add(new SelectListItem() { Text = item });
}
ViewData["grouptype"] = ddl2; //PLaces the SelectList in the ViewData[]
//If the user selected to show all data, omits the Take(1000) function
if (selectedAmount == "true")
{
//If the Value is null for both, then it will return no data.
//This case is if the User selected the default non-value option for each
if (selectedList == null && selectedGroupType == null)
{
stock = (from c in context.stocks
select new stockAJAX
{
StockId = c.StockId,
ProductGroup = c.ProductGroup,
GroupType = c.GroupType,
ItemType = c.ItemType,
Model = c.Model,
SerialNo = c.SerialNo,
NR = c.NR,
Status = c.Status.ToString(),
Description = c.Description,
DateArrived = c.DateArrived.ToString(),
CurrentLocation = c.CurrentLocation,
TerminalId = c.TerminalId,
}
).ToList();
}
else if (selectedGroupType == "grouptype=Select+GroupType" || selectedGroupType == null || selectedGroupType == "") //If SelecteGroupType is NULL, then no value was selected for Select GroupType
{
if (selectedList == null || selectedList == "") //if selectedList is also NULL return nothing
{
stock = (from c in context.stocks
select new stockAJAX
{
StockId = c.StockId,
ProductGroup = c.ProductGroup,
GroupType = c.GroupType,
ItemType = c.ItemType,
Model = c.Model,
SerialNo = c.SerialNo,
NR = c.NR,
Status = c.Status.ToString(),
Description = c.Description,
DateArrived = c.DateArrived.ToString(),
CurrentLocation = c.CurrentLocation,
TerminalId = c.TerminalId,
}
).ToList();
}
else //Else, if selectedList is not null, return data from query using selectedList as the testing for ProductGroup
{
stock = (from c in context.stocks
where c.ProductGroup == selectedList
select new stockAJAX
{
StockId = c.StockId,
ProductGroup = c.ProductGroup,
GroupType = c.GroupType,
ItemType = c.ItemType,
Model = c.Model,
SerialNo = c.SerialNo,
NR = c.NR,
Status = c.Status.ToString(),
Description = c.Description,
DateArrived = c.DateArrived.ToString(),
CurrentLocation = c.CurrentLocation,
TerminalId = c.TerminalId,
}
).ToList();
}
}
else if (selectedList == "list=Select+Company" || selectedList == null || selectedList == "") //if select list is null, then no value was selected for Select Company
{
stock = (from c in context.stocks
where c.GroupType == selectedGroupType
select new stockAJAX
{
StockId = c.StockId,
ProductGroup = c.ProductGroup,
GroupType = c.GroupType,
ItemType = c.ItemType,
Model = c.Model,
SerialNo = c.SerialNo,
NR = c.NR,
Status = c.Status.ToString(),
Description = c.Description,
DateArrived = c.DateArrived.ToString(),
CurrentLocation = c.CurrentLocation,
TerminalId = c.TerminalId,
}
).ToList();
}
else //else if grouptype is not null, retrun data from query using groupType as the testing for GroupType
{
stock = (from c in context.stocks
where c.ProductGroup == selectedList
where c.GroupType == selectedGroupType
select new stockAJAX
{
StockId = c.StockId,
ProductGroup = c.ProductGroup,
GroupType = c.GroupType,
ItemType = c.ItemType,
Model = c.Model,
SerialNo = c.SerialNo,
NR = c.NR,
Status = c.Status.ToString(),
Description = c.Description,
DateArrived = c.DateArrived.ToString(),
CurrentLocation = c.CurrentLocation,
TerminalId = c.TerminalId,
}
).ToList();
}
}
else //If Show All was not checked, then select top 1000 ordered by descending date
{
//If the Value is null for both, then it will return no data.
//This case is if the User selected the default non-value option for each
if (selectedList == null && selectedGroupType == null)
{
stock = null;
}
else if (selectedGroupType == "grouptype=Select+GroupType" || selectedGroupType == null || selectedGroupType == "") //If SelecteGRoupType is NULL, then no value was selected for Select GroupType
{
if (selectedList == null || selectedList == "") //if selectedList is also NULL return nothing
{
stock = null;
}
else //Else, if selectedList is not null, return data from query using selectedList as the testing for ProductGroup
{
stock = (from c in context.stocks
where c.ProductGroup == selectedList
orderby c.DateArrived descending
select new stockAJAX
{
StockId = c.StockId,
ProductGroup = c.ProductGroup,
GroupType = c.GroupType,
ItemType = c.ItemType,
Model = c.Model,
SerialNo = c.SerialNo,
NR = c.NR,
Status = c.Status.ToString(),
Description = c.Description,
DateArrived = c.DateArrived.ToString(),
CurrentLocation = c.CurrentLocation,
TerminalId = c.TerminalId,
}
).Take(1000).ToList();
}
}
else if (selectedList == "list=Select+Company" || selectedList == null || selectedList == "") //if select list is null, then no value was selected for Select Company
{
stock = (from c in context.stocks
where c.GroupType == selectedGroupType
orderby c.DateArrived descending
select new stockAJAX
{
StockId = c.StockId,
ProductGroup = c.ProductGroup,
GroupType = c.GroupType,
ItemType = c.ItemType,
Model = c.Model,
SerialNo = c.SerialNo,
NR = c.NR,
Status = c.Status.ToString(),
Description = c.Description,
DateArrived = c.DateArrived.ToString(),
CurrentLocation = c.CurrentLocation,
TerminalId = c.TerminalId,
}
).Take(1000).ToList();
}
else //else if grouptype is not null, retrun data from query using groupType as the testing for GroupType
{
stock = (from c in context.stocks
where c.ProductGroup == selectedList
where c.GroupType == selectedGroupType
orderby c.DateArrived descending
select new stockAJAX
{
StockId = c.StockId,
ProductGroup = c.ProductGroup,
GroupType = c.GroupType,
ItemType = c.ItemType,
Model = c.Model,
SerialNo = c.SerialNo,
NR = c.NR,
Status = c.Status.ToString(),
Description = c.Description,
DateArrived = c.DateArrived.ToString(),
CurrentLocation = c.CurrentLocation,
TerminalId = c.TerminalId,
}
).Take(1000).ToList();
}
}
}
//return the value to be used by the DataTable
return stock;
}
//Accept GET and POST
[AcceptVerbs(HttpVerbs.Get | HttpVerbs.Post)]
public ActionResult Index(System.Web.Mvc.FormCollection collection)
{
//DateTime lastMonth = DateTime.Today.AddMonths(-6);
//Recieve Data from the Select Company DropDownList
string selectedList = collection["list"];
//Recieve Data from the Select GroupType DropDownList
string selectedGroupType = collection["grouptype"];
//Recieve Data from the Show All Stock checkbox
string selectedAmount = collection["amount"];
//A list of type <stock> has its value recieved from the function which computes which query to use and then executes it.
returnList(selectedGroupType, selectedList, selectedAmount);
//Returns the view
return View();
公共类stockAJAX
{
public int StockId{get；set；}
公共字符串ProductGroup{get；set；}
公共字符串GroupType{get；set；}
公共字符串ItemType{get；set；}
公共字符串模型{get；set；}
公共字符串SerialNo{get；set；}
公共字符串NR{get；set；}
公共字符串状态{get；set；}
公共字符串说明{get；set；}
公共字符串DateArrived{get；set；}
公共int？当前位置{get；set；}
公共字符串TerminalId{get；set；}
}
公共类TableController:控制器
{
列表库存=新列表（）；
stockAJAX ajaxTemp=newstockajax（）；
静态字符串csv；
[接受动词（HttpVerbs.Get | HttpVerbs.Post）]
公共JsonResult getAJAX（System.Web.Mvc.FormCollection）
{
//从选择公司下拉列表接收数据
string selectedList=collection[“list”]；
//从选择GroupType下拉列表接收数据
字符串selectedGroupType=collection[“grouptype”]；
//从“显示所有库存”复选框接收数据
字符串selectedAmount=collection[“amount”]；
//类型列表的值从函数接收，该函数计算要使用的查询，然后执行该查询。
stock=返回列表（selectedGroupType、selectedList、selectedAmount）；
如果（股票==null）
{
System.Windows.Forms.MessageBox.Show（“空AJAX”）；
stockAJAX stock1=新的stockAJAX（）；
stock1.StockId=0；
stock1.ProductGroup=“”；
stock1.GroupType=“”；
stock1.ItemType=“”；
stock1.Model=“”；
stock1.SerialNo=“”；
股票1.NR=“”；
股票1.状态=”；
stock1.Description=“”；
stock1.DateArrived=“”；
stock1.CurrentLocation=0；
stock1.TerminalId=“”；
返回Json（stock1，JsonRequestBehavior.AllowGet）；
}
返回Json（stock，JsonRequestBehavior.AllowGet）；
}
//函数获取DataTable和两个DropDownList的数据，两个DropDownList通过ViewData[]返回，DataTable数据通过Model返回
//从表单数据中获取三个字符串
公共列表返回列表（字符串selectedGroupType、字符串selectedList、字符串selectedAmount）
{
//此类型的列表将包含要放入DataTable的所有数据
//使用TableEntities连接到实体框架的命名空间
使用（TableEntities上下文=新TableEntities（））
{
//包含下拉列表数据的列表
IList ddl=新列表（）；
IList ddl2=新列表（）；
//临时字符串列表，用于从要放入DropDownList的实体中获取数据
List stocktemp=null；
//查询ProductGroup DropDownList
stocktemp=（来自context.stocks中的c）
选择c.ProductGroup
).Distinct（）.ToList（）；
foreach（stocktemp中的字符串项）//将在SelectList中接收的数据作为项放置
{
if（item==selectedList&&item！=null）//测试项目是否在上一个视图中被选中，如果是，则设置为默认值
Add（new SelectListItem（）{Text=item，Selected=true}）；
else if（项！=null）
Add（新的SelectListItem（）{Text=item}）；
}
ViewData[“list”]=ddl；//将SelectList放置在ViewData[]
//查询GroupType DropDownList
stocktemp=（来自context.stocks中的c）
选择c.GroupType
).Distinct（）.ToList（）；
foreach（stocktemp中的string item）//测试该项是否在最后一个视图中被选中，如果是，则设置为默认值
{
if（item==selectedGroupType&&item！=null）
ddl2.Add（新的SelectListItem（）{Text=item，Selected=true}）；
else if（项！=null）
ddl2.Add（新建SelectListItem（）{Text=item}）；
}
ViewData[“grouptype”]=ddl2；//将选择列表放置在ViewData[]
//如果用户选择显示所有数据，则忽略Take（1000）功能
如果（selectedAmount==“true”）
{
//如果两者的值都为null，则它将不返回任何数据。
//这种情况下，如果用户为每个选项选择了默认的非值选项
if（selectedList==null&&selectedGroupType==null）
{
stock=（来自context.stocks中的c）
选择新stockAJAX
{
StockId=c.StockId，
ProductGroup=c.ProductGroup，
GroupType=c.GroupType，
ItemType=c.ItemType，
模型=c.模型，
SerialNo=c.SerialNo，
NR=c.NR，
Status=c.Status.ToString（），
描述=c.描述，
DateArrized=c.DateArrized.ToString（），
CurrentLocation=c.CurrentLocation，
var Json = [
{ StockId: 0,
ProductGroup: 0,
GroupType: 0,
ItemType: 0 ,
Model: 0 ,
SerialNo: 0,
NR: 0 ,
Status: 0,
Description: 0,
DateArrived: 0 ,
CurrentLocation: 0 ,
TerminalId: 0,
},
];
$("#myTable").DataTable({
"JQueryUI": true,
"stateSave": true,
"ajax": $.ajax({
contentType: 'application/json; charset=utf-8',
dataType: 'json',
type: 'GET',
url: '/Table/getAJAX',
data: Json,
success: function(Json)
{
if (Json.length == 0 || Json == null)
alert(post);
var _len = Json.length, post, i;
for (i = 0; i < _len; i++) {
post = Json[i];
alert(post);
}
},
failure: function () { alert("unavailable"); },
})
});
$('#loading').hide();
$('#myTable').show();
<div class="filter">
<form class="my-form" method="post" action="~/Table/Index">
<br />
@Html.DropDownList("list", "Select Company")
@Html.DropDownList("grouptype", "Select GroupType")
<br />
<button input type="submit"> Submit </button>
<input type="checkbox" name="amount" id="amount" value="true"><p2>Show All Company Stock</p2>
<br /><br />
</form>
</div>
<table class="table-fill" id="myTable">
<thead>
<tr>
<th>
<p1>Stock Id</p1>
</th>
<th>
<p1>Product Group</p1>
</th>
<th>
<p1>Group Type</p1>
</th>
<th>
<p1>Item Type</p1>
</th>
<th>
<p1>Model</p1>
</th>
<th>
<p1>Serial No</p1>
</th>
<th>
<p1>NR</p1>
</th>
<th>
<p1>Status</p1>
</th>
<th>
<p1>Description</p1>
</th>
<th>
<p1>Date Arrived</p1>
</th>
<th>
<p1>Current Location</p1>
</th>
<th>
<p1>Terminal ID</p1>
</th>
</tr>
</thead>
<tfoot>
<tr>
<th>Id</th>
<th>Product</th>
<th>Group</th>
<th>Item</th>
<th>Model</th>
<th>Serial</th>
<th>NR</th>
<th>Status</th>
<th>Descr</th>
<th>Date</th>
<th>Location</th>
<th>T-ID</th>
</tr>
</tfoot>
</table>
public List<stockAJAX> returnList(string selectedGroupType, string selectedList, string selectedAmount)
{
using (TableEntities context = new TableEntities())
{
// Do base query
IQueryable<stock> stocks = context.stocks.AsQueryable();
// Do filtering here
if (selectedList == null && selectedGroupType == null)
{
// return all the records
}
else if (selectedGroupType == "grouptype=Select+GroupType" || selectedGroupType == null || selectedGroupType == "") //If SelecteGroupType is NULL, then no value was selected for Select GroupType
{
if (selectedList == null || selectedList == "") //if selectedList is also NULL return nothing
{
// return all the records
}
else //Else, if selectedList is not null, return data from query using selectedList as the testing for ProductGroup
{
stocks = stocks.Where(c=>c.ProductGroup == selectedList);
}
}
else if (selectedList == "list=Select+Company" || selectedList == null || selectedList == "") //if select list is null, then no value was selected for Select Company
{
stocks = stocks.Where(c=>c.GroupType == selectedGroupType);
}
else //else if grouptype is not null, retrun data from query using groupType as the testing for GroupType
{
stocks = stocks
.Where(c=>c.ProductGroup == selectedList)
.Where(c=>c.GroupType == selectedGroupType);
}
// Apply limit
if (selectedAmount != "true")
{
stocks = stocks
.OrderByDescending(c=>c.DateArrived)
.Take(1000);
}
// Do projection to DTO
var result = stocks.Select(c=>new stockAJAX
{
StockId = c.StockId,
ProductGroup = c.ProductGroup,
GroupType = c.GroupType,
ItemType = c.ItemType,
Model = c.Model,
SerialNo = c.SerialNo,
NR = c.NR,
Status = c.Status.ToString(),
Description = c.Description,
DateArrived = c.DateArrived.ToString(),
CurrentLocation = c.CurrentLocation,
TerminalId = c.TerminalId,
}).ToList();
}
//return the value to be used by the DataTable
return result;
}
[AcceptVerbs(HttpVerbs.Get | HttpVerbs.Post)]
public JsonResult getAJAX()
{
using (TableEntities context = new TableEntities())
{
stock = (from c in context.stocks
select new stockAJAX
{
StockId = c.StockId,
ProductGroup = c.ProductGroup,
GroupType = c.GroupType,
ItemType = c.ItemType,
Model = c.Model,
SerialNo = c.SerialNo,
NR = c.NR,
Status = c.Status.ToString(),
Description = c.Description,
DateArrived = c.DateArrived.ToString(),
CurrentLocation = c.CurrentLocation,
TerminalId = c.TerminalId,
}
).Take(1000).ToList();
}
return Json(stock, JsonRequestBehavior.AllowGet);
}