如何解决ASP.NET Core 3.1中的数据表服务器端处理 代码
通过AJAX调用，我对数据表不熟悉。我需要实现数千条记录的服务器端处理。我正在学习教程，但是在某些地方与服务器端处理相混淆。
尝试从数据源渲染数据时出现错误。让我发布所有相关代码，并希望您能帮助我确定错误之处。由于我是 Datatables 和Ajax的新手，所以我将不胜感激，提供了示例，文本答案以及代码或链接到教程的更多答案，这些教程或教程链接了 ASP.NET CORE 3.1中的服务器端处理。 。
感谢您的宝贵时间和帮助。
NB。我从一个教程中获取了实现和配置，并尝试对其进行自定义。
下面是HTML表及其模型：
@model IEnumerable<StudentApplications>
<table id="custom-datatable" class="mb-5 display table table-bordered" style="width:100%">
<thead>
<tr>
<th>
@Html.DisplayNameFor(model => model.ApplicationId)
</th>
<th>
@Html.DisplayNameFor(model => model.Firstname)
</th>
<th>
@Html.DisplayNameFor(model => model.Surname)
</th>
<th>
@Html.DisplayNameFor(model => model.ApplicationFor)
</th>
<th>
@Html.DisplayNameFor(model => model.SubmissionDate)
</th>
<th></th>
</tr>
</thead>
<tfoot>
<tr>
<th>
@Html.DisplayNameFor(model => model.ApplicationId)
</th>
<th>
@Html.DisplayNameFor(model => model.Firstname)
</th>
<th>
@Html.DisplayNameFor(model => model.Surname)
</th>
<th>
@Html.DisplayNameFor(model => model.ApplicationFor)
</th>
<th>
@Html.DisplayNameFor(model => model.SubmissionDate)
</th>
<th></th>
</tr>
</tfoot>
</table>
以下是将HTML表初始化为数据表和某些配置的javascript文件：
$(document).ready(function () {
$('#custom-datatable').DataTable({
// Design Assets
stateSave: true,autoWidth: true,// ServerSide Setups
processing: true,serverSide: true,// Paging Setups
paging: true,// Searching Setups
searching: { regex: true },// Ajax Filter
ajax: {
url: "/myapplications/data",type: "POST",contentType: "application/json",dataType: "json",data: function (d) {
return JSON.stringify(d);
}
},// Columns Setups
columns: [
{ data: "ApplicationId" },{ data: "Firstname" },{ data: "Surname" },{ data: "ApplicationFor" },{ data: "SubmissionDate" }
//// For Student.Id
//{ "data": "applicationId","name": "ApplicationId" },//// For Student.Firstname
//{ "data": "firstname","name": "Firstname" },//// For Student.Surname
//{ "data": "surname","name": "Surname" },//// For Student.ApplicationFor
//{ "data": "applicationFor","name": "ApplicationFor" },//// For Student.SubmissionDate
//{ "data": "submissionDate","name": "SubmissionDate" }
],// Column Definitions
columnDefs: [
{ targets: "no-sort",orderable: false },{ targets: "no-search",searchable: false },{
targets: "trim",render: function (data,type,full,meta) {
if (type === "display") {
data = strtrunc(data,10);
}
return data;
}
},{ targets: "date-type",type: "date-eu" },{
targets: 10,data: null,orderable: false
},]
});
});
以下是获取数据的方法：
// loading datatable
[HttpPost]
[Route("myapplications/data")]
public async Task<IActionResult> Data([FromBody] DtParameters dtParameters)
{
searchBy = dtParameters.Search?.Value;
// if we have an empty search then just order the results by Id ascending
var orderCriteria = "ApplicationId";
var orderAscendingDirection = true;
if (dtParameters.Order != null)
{
// in this example we just default sort on the 1st column
orderCriteria = dtParameters.Columns[dtParameters.Order[0].Column].Data;
orderAscendingDirection = dtParameters.Order[0].Dir.ToString().ToLower() == "asc";
}
var result = context.AspNetStudentApplications.AsQueryable();
if (!string.IsNullOrEmpty(searchBy))
{
result = result.Where(r => r.ApplicationId != null && r.ApplicationId.ToUpper().Contains(searchBy.ToUpper()) ||
r.Firstname != null && r.Firstname.ToUpper().Contains(searchBy.ToUpper()) ||
r.Surname != null && r.Surname.ToUpper().Contains(searchBy.ToUpper()) ||
r.ApplicationFor != null && r.ApplicationFor.ToUpper().Contains(searchBy.ToUpper()) ||
r.SubmissionDate != null && r.SubmissionDate.ToUpper().Contains(searchBy.ToUpper()));
}
result = orderAscendingDirection ? result.OrderByDynamic(orderCriteria,DtOrderDir.Asc) : result.OrderByDynamic(orderCriteria,DtOrderDir.Desc);
// now just get the count of items (without the skip and take) - eg how many could be returned with filtering
var filteredResultsCount = await result.CountAsync();
var totalResultsCount = await context.AspNetStudentApplications.CountAsync();
return Json(new DtResult<StudentApplications>
{
Draw = dtParameters.Draw,RecordsTotal = totalResultsCount,RecordsFiltered = filteredResultsCount,Data = await result
.Skip(dtParameters.Start)
.Take(dtParameters.Length)
.ToListAsync()
});
}
以下是DtParameters类和与数据表相关的其他类：
/// <summary>
/// A full result,as understood by jQuery DataTables.
/// </summary>
/// <typeparam name="T">The data type of each row.</typeparam>
public class DtResult<T>
{
/// <summary>
/// The draw counter that this object is a response to - from the draw parameter sent as part of the data request.
/// Note that it is strongly recommended for security reasons that you cast this parameter to an integer,rather than simply echoing back to the client what it sent in the draw parameter,in order to prevent Cross Site Scripting (XSS) attacks.
/// </summary>
[JsonProperty("draw")]
public int Draw { get; set; }
/// <summary>
/// Total records,before filtering (i.e. the total number of records in the database)
/// </summary>
[JsonProperty("recordsTotal")]
public int RecordsTotal { get; set; }
/// <summary>
/// Total records,after filtering (i.e. the total number of records after filtering has been applied - not just the number of records being returned for this page of data).
/// </summary>
[JsonProperty("recordsFiltered")]
public int RecordsFiltered { get; set; }
/// <summary>
/// The data to be displayed in the table.
/// This is an array of data source objects,one for each row,which will be used by DataTables.
/// Note that this parameter's name can be changed using the ajax option's dataSrc property.
/// </summary>
[JsonProperty("data")]
public IEnumerable<T> Data { get; set; }
/// <summary>
/// Optional: If an error occurs during the running of the server-side processing script,you can inform the user of this error by passing back the error message to be displayed using this parameter.
/// Do not include if there is no error.
/// </summary>
[JsonProperty("error",NullValueHandling = NullValueHandling.Ignore)]
public string Error { get; set; }
public string PartialView { get; set; }
}
/// <summary>
/// The additional columns that you can send to jQuery DataTables for automatic processing.
/// </summary>
public abstract class DtRow
{
/// <summary>
/// Set the ID property of the dt-tag tr node to this value
/// </summary>
[JsonProperty("DT_RowId")]
public virtual string DtRowId => null;
/// <summary>
/// Add this class to the dt-tag tr node
/// </summary>
[JsonProperty("DT_RowClass")]
public virtual string DtRowClass => null;
/// <summary>
/// Add the data contained in the object to the row using the jQuery data() method to set the data,which can also then be used for later retrieval (for example on a click event).
/// </summary>
[JsonProperty("DT_RowData")]
public virtual object DtRowData => null;
/// <summary>
/// Add the data contained in the object to the row dt-tag tr node as attributes.
/// The object keys are used as the attribute keys and the values as the corresponding attribute values.
/// This is performed using using the jQuery param() method.
/// Please note that this option requires DataTables 1.10.5 or newer.
/// </summary>
[JsonProperty("DT_RowAttr")]
public virtual object DtRowAttr => null;
}
/// <summary>
/// The parameters sent by jQuery DataTables in AJAX queries.
/// </summary>
public class DtParameters
{
/// <summary>
/// Draw counter.
/// This is used by DataTables to ensure that the Ajax returns from server-side processing requests are drawn in sequence by DataTables (Ajax requests are asynchronous and thus can return out of sequence).
/// This is used as part of the draw return parameter (see below).
/// </summary>
public int Draw { get; set; }
/// <summary>
/// An array defining all columns in the table.
/// </summary>
public DtColumn[] Columns { get; set; }
/// <summary>
/// An array defining how many columns are being ordering upon - i.e. if the array length is 1,then a single column sort is being performed,otherwise a multi-column sort is being performed.
/// </summary>
public DtOrder[] Order { get; set; }
/// <summary>
/// Paging first record indicator.
/// This is the start point in the current data set (0 index based - i.e. 0 is the first record).
/// </summary>
public int Start { get; set; }
/// <summary>
/// Number of records that the table can display in the current draw.
/// It is expected that the number of records returned will be equal to this number,unless the server has fewer records to return.
/// Note that this can be -1 to indicate that all records should be returned (although that negates any benefits of server-side processing!)
/// </summary>
public int Length { get; set; }
/// <summary>
/// Global search value. To be applied to all columns which have searchable as true.
/// </summary>
public DtSearch Search { get; set; }
/// <summary>
/// Custom column that is used to further sort on the first Order column.
/// </summary>
public string SortOrder => Columns != null && Order != null && Order.Length > 0
? (Columns[Order[0].Column].Data +
(Order[0].Dir == DtOrderDir.Desc ? " " + Order[0].Dir : string.Empty))
: null;
/// <summary>
/// For Posting Additional Parameters to Server
/// </summary>
public IEnumerable<string> AdditionalValues { get; set; }
}
/// <summary>
/// A jQuery DataTables column.
/// </summary>
public class DtColumn
{
/// <summary>
/// Column's data source,as defined by columns.data.
/// </summary>
public string Data { get; set; }
/// <summary>
/// Column's name,as defined by columns.name.
/// </summary>
public string Name { get; set; }
/// <summary>
/// Flag to indicate if this column is searchable (true) or not (false). This is controlled by columns.searchable.
/// </summary>
public bool Searchable { get; set; }
/// <summary>
/// Flag to indicate if this column is orderable (true) or not (false). This is controlled by columns.orderable.
/// </summary>
public bool Orderable { get; set; }
/// <summary>
/// Search value to apply to this specific column.
/// </summary>
public DtSearch Search { get; set; }
}
/// <summary>
/// An order,as sent by jQuery DataTables when doing AJAX queries.
/// </summary>
public class DtOrder
{
/// <summary>
/// Column to which ordering should be applied.
/// This is an index reference to the columns array of information that is also submitted to the server.
/// </summary>
public int Column { get; set; }
/// <summary>
/// Ordering direction for this column.
/// It will be dt-string asc or dt-string desc to indicate ascending ordering or descending ordering,respectively.
/// </summary>
public DtOrderDir Dir { get; set; }
}
/// <summary>
/// Sort orders of jQuery DataTables.
/// </summary>
public enum DtOrderDir
{
Asc,Desc
}
/// <summary>
/// A search,as sent by jQuery DataTables when doing AJAX queries.
/// </summary>
public class DtSearch
{
/// <summary>
/// Global search value. To be applied to all columns which have searchable as true.
/// </summary>
public string Value { get; set; }
/// <summary>
/// true if the global filter should be treated as a regular expression for advanced searching,false otherwise.
/// Note that normally server-side processing scripts will not perform regular expression searching for performance reasons on large data sets,but it is technically possible and at the discretion of your script.
/// </summary>
public bool Regex { get; set; }
}
这是我的空表：
以下是我在尝试加载数据时遇到的错误：
我在哪里弄错了？
这是发生异常的地方：
@HMZ实现，我看到空白记录（下图）：
我看到此警报
坚持处理
当行数更改时，我看到此空表：
解决方法
您的代码需要改进：
-
默认情况下，asp.net核心中的
-
DataTable会以小写首字母表示json数据，因此您需要进行如下更改：
列：[ {data：“ applicationId”}， {data：“ firstname”}， {数据：“姓”}， {data：“ applicationFor”}， {data：“ submissionDate”} ]
-
默认数据表包含分页，排序和搜索。
-
当我测试您的代码时，它将在前端收到以下错误消息（您可以在浏览器中按
F12来检查错误消息）。不确定是否会收到此错误，因为DataTable的版本可能不同：TypeError：无法设置未定义的属性“ nTf”
我搜索了错误并得出结论，它是由表页脚中的th元素的数量与表头中的th元素的数量导致的结果。但是我发现{ {1}}和thead在您的代码中是相同的。
与传统的DataTable有点不同，您在tfoot和th的两端都有空的thead。因此，我尝试一下，然后在删除tfoot中的th，但保持tfoot中的th：
thead这是一个工作示例，如下所示：
型号：
<thead>
<tr>
<th>
@Html.DisplayNameFor(model => model.ApplicationId)
</th>
...
<th></th>
</tr>
</thead>
<tfoot>
<tr>
<th>
@Html.DisplayNameFor(model => model.ApplicationId)
</th>
....
@*<th></th>*@ //remove this...
</tr>
</tfoot>
查看：
public class StudentApplications
{
public int ApplicationId { get; set; }
public string Firstname { get; set; }
public string Surname { get; set; }
public string ApplicationFor { get; set; }
public string SubmissionDate { get; set; }
}
控制器：
@model IEnumerable<StudentApplications>
<table id="custom-datatable" class="mb-5 display table table-bordered" style="width:100%">
<thead>
<tr>
<th>
@Html.DisplayNameFor(model => model.ApplicationId)
</th>
<th>
@Html.DisplayNameFor(model => model.Firstname)
</th>
<th>
@Html.DisplayNameFor(model => model.Surname)
</th>
<th>
@Html.DisplayNameFor(model => model.ApplicationFor)
</th>
<th>
Date
</th>
<th></th>
</tr>
</thead>
<tfoot>
<tr>
<th>
@Html.DisplayNameFor(model => model.ApplicationId)
</th>
<th>
@Html.DisplayNameFor(model => model.Firstname)
</th>
<th>
@Html.DisplayNameFor(model => model.Surname)
</th>
<th>
@Html.DisplayNameFor(model => model.ApplicationFor)
</th>
<th>
@Html.DisplayNameFor(model => model.SubmissionDate)
</th>
@*<th></th>*@
</tr>
</tfoot>
</table>
@section Scripts
{
<link rel="stylesheet" type="text/css" href="https://cdn.datatables.net/1.10.20/css/jquery.dataTables.css">
<script type="text/javascript" charset="utf8" src="https://cdn.datatables.net/1.10.20/js/jquery.dataTables.js"></script>
<script>
$(document).ready(function () {
$('#custom-datatable').DataTable({
ajax: {
url: "/Home/data",type:"POST"
},columns: [
{ data: "applicationId" },{ data: "firstname" },{ data: "surname" },{ data: "applicationFor" },{ data: "submissionDate" }
]
});
});
</script>
}
Startup.cs：
[HttpPost]
public ActionResult Data()
{
var model = new List<StudentApplications>()
{
new StudentApplications(){ ApplicationId=1,ApplicationFor="aa",Firstname="Rena",SubmissionDate="2020-8-9",Surname="Ni"},new StudentApplications(){ ApplicationId=2,ApplicationFor="bb",Firstname="Sherry",SubmissionDate="2020-10-7",Surname="Chen"},new StudentApplications(){ ApplicationId=3,ApplicationFor="cc",Firstname="Xing",SubmissionDate="2020-5-10",Surname="Zou"},new StudentApplications(){ ApplicationId=4,ApplicationFor="dd",Firstname="a",new StudentApplications(){ ApplicationId=5,ApplicationFor="ee",Firstname="b",Surname="sd"},new StudentApplications(){ ApplicationId=6,ApplicationFor="ff",Firstname="c",Surname="df"},new StudentApplications(){ ApplicationId=7,ApplicationFor="gg",Firstname="d",Surname="Zdfgou"},new StudentApplications(){ ApplicationId=8,ApplicationFor="hh",Firstname="e",Surname="dfg"},new StudentApplications(){ ApplicationId=9,ApplicationFor="ii",Firstname="f",new StudentApplications(){ ApplicationId=10,ApplicationFor="jj",Firstname="g",Surname="vbc"},new StudentApplications(){ ApplicationId=11,ApplicationFor="kk",Firstname="h",Surname="hj"},new StudentApplications(){ ApplicationId=12,ApplicationFor="ll",Firstname="i",Surname="hjk"},new StudentApplications(){ ApplicationId=13,ApplicationFor="mm",Firstname="j",Surname="tyu"},};
return Json(new {Data = model});
}
结果：
我发现了问题。我缺少JsonSerializer，因此将其添加到Startup.cs类中。
此方法可以正常工作：
[HttpPost]
public async Task<IActionResult> LoadTable([FromBody] DtParameters dtParameters)
{
var searchBy = dtParameters.Search?.Value;
// if we have an empty search then just order the results by Id ascending
var orderCriteria = "Id";
var orderAscendingDirection = true;
if (dtParameters.Order != null)
{
// in this example we just default sort on the 1st column
orderCriteria = dtParameters.Columns[dtParameters.Order[0].Column].Data;
orderAscendingDirection = dtParameters.Order[0].Dir.ToString().ToLower() == "asc";
}
var result = context.TestRegisters.AsQueryable();
if (!string.IsNullOrEmpty(searchBy))
{
result = result.Where(r => r.Name != null && r.Name.ToUpper().Contains(searchBy.ToUpper()) ||
r.FirstSurname != null && r.FirstSurname.ToUpper().Contains(searchBy.ToUpper()) ||
r.SecondSurname != null && r.SecondSurname.ToUpper().Contains(searchBy.ToUpper()) ||
r.Street != null && r.Street.ToUpper().Contains(searchBy.ToUpper()) ||
r.Phone != null && r.Phone.ToUpper().Contains(searchBy.ToUpper()) ||
r.ZipCode != null && r.ZipCode.ToUpper().Contains(searchBy.ToUpper()) ||
r.Country != null && r.Country.ToUpper().Contains(searchBy.ToUpper()) ||
r.Notes != null && r.Notes.ToUpper().Contains(searchBy.ToUpper()));
}
result = orderAscendingDirection ? result.OrderByDynamic(orderCriteria,DtOrderDir.Asc) : result.OrderByDynamic(orderCriteria,DtOrderDir.Desc);
// now just get the count of items (without the skip and take) - eg how many could be returned with filtering
var filteredResultsCount = await result.CountAsync();
var totalResultsCount = await context.TestRegisters.CountAsync();
return Json(new DtResult<TestRegister>
{
Draw = dtParameters.Draw,RecordsTotal = totalResultsCount,RecordsFiltered = filteredResultsCount,Data = await result
.Skip(dtParameters.Start)
.Take(dtParameters.Length)
.ToListAsync()
});
}
这些DtParameter正确：
public class DtResult<T>
{
/// <summary>
/// The draw counter that this object is a response to - from the draw parameter sent as part of the data request.
/// Note that it is strongly recommended for security reasons that you cast this parameter to an integer,rather than simply echoing back to the client what it sent in the draw parameter,in order to prevent Cross Site Scripting (XSS) attacks.
/// </summary>
[JsonProperty("draw")]
public int Draw { get; set; }
/// <summary>
/// Total records,before filtering (i.e. the total number of records in the database)
/// </summary>
[JsonProperty("recordsTotal")]
public int RecordsTotal { get; set; }
/// <summary>
/// Total records,after filtering (i.e. the total number of records after filtering has been applied - not just the number of records being returned for this page of data).
/// </summary>
[JsonProperty("recordsFiltered")]
public int RecordsFiltered { get; set; }
/// <summary>
/// The data to be displayed in the table.
/// This is an array of data source objects,one for each row,which will be used by DataTables.
/// Note that this parameter's name can be changed using the ajax option's dataSrc property.
/// </summary>
[JsonProperty("data")]
public IEnumerable<T> Data { get; set; }
/// <summary>
/// Optional: If an error occurs during the running of the server-side processing script,you can inform the user of this error by passing back the error message to be displayed using this parameter.
/// Do not include if there is no error.
/// </summary>
[JsonProperty("error",NullValueHandling = NullValueHandling.Ignore)]
public string Error { get; set; }
public string PartialView { get; set; }
}
/// <summary>
/// The additional columns that you can send to jQuery DataTables for automatic processing.
/// </summary>
public abstract class DtRow
{
/// <summary>
/// Set the ID property of the dt-tag tr node to this value
/// </summary>
[JsonProperty("DT_RowId")]
public virtual string DtRowId => null;
/// <summary>
/// Add this class to the dt-tag tr node
/// </summary>
[JsonProperty("DT_RowClass")]
public virtual string DtRowClass => null;
/// <summary>
/// Add the data contained in the object to the row using the jQuery data() method to set the data,which can also then be used for later retrieval (for example on a click event).
/// </summary>
[JsonProperty("DT_RowData")]
public virtual object DtRowData => null;
/// <summary>
/// Add the data contained in the object to the row dt-tag tr node as attributes.
/// The object keys are used as the attribute keys and the values as the corresponding attribute values.
/// This is performed using using the jQuery param() method.
/// Please note that this option requires DataTables 1.10.5 or newer.
/// </summary>
[JsonProperty("DT_RowAttr")]
public virtual object DtRowAttr => null;
}
/// <summary>
/// The parameters sent by jQuery DataTables in AJAX queries.
/// </summary>
public class DtParameters
{
//public DtParameters()
//{
// Search = new DtSearch();
// Search.Value = "";
//}
/// <summary>
/// Draw counter.
/// This is used by DataTables to ensure that the Ajax returns from server-side processing requests are drawn in sequence by DataTables (Ajax requests are asynchronous and thus can return out of sequence).
/// This is used as part of the draw return parameter (see below).
/// </summary>
public int Draw { get; set; }
/// <summary>
/// An array defining all columns in the table.
/// </summary>
public DtColumn[] Columns { get; set; }
/// <summary>
/// An array defining how many columns are being ordering upon - i.e. if the array length is 1,then a single column sort is being performed,otherwise a multi-column sort is being performed.
/// </summary>
public DtOrder[] Order { get; set; }
/// <summary>
/// Paging first record indicator.
/// This is the start point in the current data set (0 index based - i.e. 0 is the first record).
/// </summary>
public int Start { get; set; }
/// <summary>
/// Number of records that the table can display in the current draw.
/// It is expected that the number of records returned will be equal to this number,unless the server has fewer records to return.
/// Note that this can be -1 to indicate that all records should be returned (although that negates any benefits of server-side processing!)
/// </summary>
public int Length { get; set; }
/// <summary>
/// Global search value. To be applied to all columns which have searchable as true.
/// </summary>
public DtSearch Search { get; set; }
/// <summary>
/// Custom column that is used to further sort on the first Order column.
/// </summary>
public string SortOrder => Columns != null && Order != null && Order.Length > 0
? (Columns[Order[0].Column].Data +
(Order[0].Dir == DtOrderDir.Desc ? " " + Order[0].Dir : string.Empty))
: null;
/// <summary>
/// For Posting Additional Parameters to Server
/// </summary>
public IEnumerable<string> AdditionalValues { get; set; }
}
/// <summary>
/// A jQuery DataTables column.
/// </summary>
public class DtColumn
{
/// <summary>
/// Column's data source,as defined by columns.data.
/// </summary>
public string Data { get; set; }
/// <summary>
/// Column's name,as defined by columns.name.
/// </summary>
public string Name { get; set; }
/// <summary>
/// Flag to indicate if this column is searchable (true) or not (false). This is controlled by columns.searchable.
/// </summary>
public bool Searchable { get; set; }
/// <summary>
/// Flag to indicate if this column is orderable (true) or not (false). This is controlled by columns.orderable.
/// </summary>
public bool Orderable { get; set; }
/// <summary>
/// Search value to apply to this specific column.
/// </summary>
public DtSearch Search { get; set; }
}
/// <summary>
/// An order,as sent by jQuery DataTables when doing AJAX queries.
/// </summary>
public class DtOrder
{
/// <summary>
/// Column to which ordering should be applied.
/// This is an index reference to the columns array of information that is also submitted to the server.
/// </summary>
public int Column { get; set; }
/// <summary>
/// Ordering direction for this column.
/// It will be dt-string asc or dt-string desc to indicate ascending ordering or descending ordering,respectively.
/// </summary>
public DtOrderDir Dir { get; set; }
}
/// <summary>
/// Sort orders of jQuery DataTables.
/// </summary>
public enum DtOrderDir
{
Asc,Desc
}
/// <summary>
/// A search,as sent by jQuery DataTables when doing AJAX queries.
/// </summary>
public class DtSearch
{
/// <summary>
/// Global search value. To be applied to all columns which have searchable as true.
/// </summary>
public string Value { get; set; }
/// <summary>
/// true if the global filter should be treated as a regular expression for advanced searching,false otherwise.
/// Note that normally server-side processing scripts will not perform regular expression searching for performance reasons on large data sets,but it is technically possible and at the discretion of your script.
/// </summary>
public bool Regex { get; set; }
}
此数据表配置正确：
$(document).ready(function () {
$("#demoTable").DataTable({
// Design Assets
stateSave: true,autoWidth: true,// ServerSide Setups
processing: true,serverSide: true,// Paging Setups
paging: true,// Searching Setups
searching: { regex: true },// Ajax Filter
ajax: {
url: "/TestRegisters/LoadTable",type: "POST",contentType: "application/json",dataType: "json",data: function (d) {
return JSON.stringify(d);
}
},// Columns Setups
columns: [
{ data: "id" },{ data: "name" },{ data: "firstSurname" },{ data: "secondSurname" },{ data: "street" },{ data: "phone" },{ data: "zipCode" },{ data: "country" },{ data: "notes" },{ data: "creationDate" }
]
});
});
这是我刚开始进行工作时就遗漏的单行代码：
services.AddControllers().AddJsonOptions(options => options.JsonSerializerOptions.Converters.Add(new JsonStringEnumConverter()));
添加JsonSerializer后，我得到以下结果：
这是Datatables服务器端处理的工作示例。这是一个示例，可能需要修改才能在您的应用程序中工作。
代码
Datatables表参数：
[ModelBinder(BinderType = typeof(DataTableModelBinder))]
public class DataTablesResult
{
public int Draw { get; set; }
public int Start { get; set; }
public int Length { get; set; }
public Search Search { get; set; }
public List<ColumnOrder> Order { get; set; }
public List<Column> Columns { get; set; }
}
public class Search
{
public string Value { get; set; }
public bool Regex { get; set; }
}
public class Column
{
public string Data { get; set; }
public string Name { get; set; }
public bool Searchable { get; set; }
public bool Orderable { get; set; }
public Search Search { get; set; }
}
public class ColumnOrder
{
public int Column { get; set; }
public string Dir { get; set; }
}
自定义模型绑定程序，以便在服务器端使用DataTablesResult正确绑定表参数：
public class DataTableModelBinder : IModelBinder
{
public Task BindModelAsync(ModelBindingContext bindingContext)
{
var request = bindingContext.HttpContext.Request;
// Retrieve request data
var draw = Convert.ToInt32(request.Query["draw"]);
var start = Convert.ToInt32(request.Query["start"]);
var length = Convert.ToInt32(request.Query["length"]);
// Search
var search = new Search
{
Value = request.Query["search[value]"],Regex = Convert.ToBoolean(request.Query["search[regex]"])
};
// Order
var o = 0;
var order = new List<ColumnOrder>();
while (!StringValues.IsNullOrEmpty(request.Query["order[" + o + "][column]"]))
{
order.Add(new ColumnOrder
{
Column = Convert.ToInt32(request.Query["order[" + o + "][column]"]),Dir = request.Query["order[" + o + "][dir]"]
});
o++;
}
// Columns
var c = 0;
var columns = new List<Column>();
while (!StringValues.IsNullOrEmpty(request.Query["columns[" + c + "][name]"]))
{
columns.Add(new Column
{
Data = request.Query["columns[" + c + "][data]"],Name = request.Query["columns[" + c + "][name]"],Orderable = Convert.ToBoolean(request.Query["columns[" + c + "][orderable]"]),Searchable = Convert.ToBoolean(request.Query["columns[" + c + "][searchable]"]),Search = new Search
{
Value = request.Query["columns[" + c + "][search][value]"],Regex = Convert.ToBoolean(request.Query["columns[" + c + "][search][regex]"])
}
});
c++;
}
var result = new DataTablesResult
{
Draw = draw,Start = start,Length = length,Search = search,Order = order,Columns = columns
};
bindingContext.Result = ModelBindingResult.Success(result);
return Task.CompletedTask;
}
}
服务器端操作：
[HttpGet]
public async Task<IActionResult> DataAjax(DataTablesResult tableParams)
{
var query = dataWrapper.YourDataSet.GetAll();
var totalCount = await query.CountAsync();
if (tableParams.Search != null)
query = query.Where(c => c.Firstname.Contains(tableParams.Search.Value)
|| c.Surname.Contains(tableParams.Search.Value));
//Other search queries goes here
if (tableParams.Order.Count > 0)
{
if (tableParams.Order[0].Dir == "asc")
query = query.OrderBy(c => EF.Property<string>(c,tableParams.Columns[tableParams.Order[0].Column].Name));
else
query = query.OrderByDescending(c => EF.Property<string>(c,tableParams.Columns[tableParams.Order[0].Column].Name));
}
//In this example multi order is disabled so we can order by any column dynamically
var result = await query.AsNoTracking().Select(E => new { Count = query.Count(),E = E }).Skip(tableParams.Start).Take(tableParams.Length).ToListAsync();
var pureData = result.Select(E => E.E);
if (result.Count == 0)
return Ok(new { tableParams.Draw,recordsTotal = 0,recordsFiltered = 0,data = Enumerable.Empty<string>() });
return Ok(new { tableParams.Draw,recordsTotal = totalCount,recordsFiltered = result.Select(c => c.Count).FirstOrDefault(),data = pureData });
}
数据表配置：
var table = $("#dataTable").DataTable({
serverSide: true,processing: true,ajax: {
url: "/Controller/DataAjax",method: "GET",dataType: "json"
},select: true,orderMulti: false,//Multi column order is disabled
columnDefs: [{
targets: [],//Here you can specify targets for cell ellipsis
render: $.fn.dataTable.render.ellipsis(10,true)
},{
targets: [],//Disable search on targeted columns
searchable: false
},//Disable order on targeted columns
orderable: false
}],columns: [
{ "name": "ApplicationId" } //Here your column names should match your db columns in order to have dynamic order.
]
});
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