我正在为DataTables编写服务器端处理代码。我有一个UI页面，我收集所有用户输入，如开始/结束日期，令牌ID，批次ID等。现在我必须将这些值传递给后端脚本并运行查询并将输出呈现到UI页面中的数据表。
所以我有JS代码来获取和验证用户输入，但我不知道如何调用/设置数据表的params以状态服务器端脚本。以下是我的剧本：
function runreport(datastring)
{
var oTable = $('#example').dataTable( {
"bProcessing": true,
"bServerSide": true,
"sAjaxSource": "runsearch.py",
"bDestroy" : true,
"fnServerData": function ( sSource, aoData, fnCallback ) {
$.ajax( {
"dataType": 'json',
"type": "POST",
"url": sSource,
"data": aoData,
"success": function(json) {
$("div#report_result").show();
$('html, body').animate({scrollTop:$(document).height()}, 'slow');
fnCallback(json);
}
} );
}
} );
}
当验证所有输入参数时，我调用'runreport'方法。我构建数据字符串就像查询字符串：token_id = xxxx＆amp; email_id=asdsad@jj.com& start_date = 1212121212＆amp; end_date = 98989898但是这些值没有通过？我收到以下错误：
k is undefined
[Break On This Error]
...Sorting=="undefined"&&typeof e.saved_aaSorting=="undefined")e.aaSorting[a][1]=k....
jquery....min.js (line 150)
我们应该怎么做才能从后端脚本生成DataTables结果？
我没有按要求获得结果输出？这是为服务器端进程调用DataTables功能的正确方法吗？
下面是我转储静态结果集的Python代码：
#!/usr/local/bin/python
import cgi
import MySQLdb
import json
print "Content-Type: application/json"
print
displaylength =5
result = {'iDisplayLength':str(displaylength), 'sPaginationType':'full_numbers', 'bProcessing':1, 'bDestroy': 1, 'bRetrieve':1, 'aaData':[{'First Field':'First Field Value', 'Second Field':'Second Field Value', 'Third Field':'Third Field Value', 'Fourth Field':'Fourth Field Value', 'Fifth Field':'Fifth Field Value', 'Sixth Field':'Sixth Field Value', 'Seventh Field':'Seventh Field Value', 'Eight Field':'Eight Field Value', 'Nineth Field':'Nineth Field Value'}, {'First Field':'First Field Value', 'Second Field':'Second Field Value', 'Third Field':'Third Field Value', 'Fourth Field':'Fourth Field Value', 'Fifth Field':'Fifth Field Value', 'Sixth Field':'Sixth Field Value', 'Seventh Field':'Seventh Field Value', 'Eight Field':'Eight Field Value', 'Nineth Field':'Nineth Field Value'}], 'aoColumns':[{'sTitle':'First Field', 'mDataProp': 'First Field'},{ 'sTitle':'Second Field', 'mDataProp': 'Second Field'}, {'sTitle':'Third Field', 'mDataProp': 'Third Field' }, { 'sTitle':'Fourth Field', 'mDataProp': 'Fourth Field' }, { 'sTitle':'Fifth Field' , 'mDataProp': 'Fifth Field' }, { 'sTitle':'Sixth Field', 'mDataProp': 'Sixth Field' }, { 'sTitle':'Seventh Field', 'mDataProp': 'Seventh Field' }, { 'sTitle':'Eight Field', 'mDataProp': 'Eight Field' }, { 'sTitle':'Nineth Field', 'mDataProp': 'Nineth Field' }]}
json_string = json.dumps(result)
print json_string
答案 0 :(得分：0)
有多种方法可以做到这一点。 DataTables支持AJAX source，因此您可以编写一个脚本，输出一个json数组并将其传递给DataTables插件。您也可以只从PHP呈现该表。
我会查看其中的一些examples，以了解将数据传递给DataTables的其他方法。
答案 1 :(得分：0)
aoData.push是您正在寻找的。将此用于fnServerData回调，将aoData.push中的名称和值替换为要传递的值。名称将是键，值将是值，作为$ _REQUEST变量传递：
"fnServerData": function ( sSource, aoData, fnCallback ) {
aoData.push({ "name": "var1name", "value": $('#var1').val() },
{ "var2name": "company_name", "value": $('#var2').val() });
$.ajax({
"dataType": 'json',
"type": "POST",
"url": sSource,
"data": aoData,
"success": fnCallback
});
}
要测试它是否正常工作，请使获取ajax请求的页面只需将$ _REQUEST邮寄给您。您应该将这些变量视为其中的一部分。
回调的常见伴侣是添加一个按钮来刷新表。这只是通过将以下内容绑定到刷新按钮上的单击处理程序来完成的：
oTable.fnDraw(false);
答案 2 :(得分：0)
以下是我的一些数据表C＃代码和服务器端/客户端
如果你愿意，你可以使用它将它翻译成python，我从Alans PHP示例中翻译了它
客户机侧：
/* Instantiate the Datatables on the ASP.NET GridView */
var dt = $('#gvJobs').dataTable({
"sDom": 'C<"clear">Rlfrtip', /* ColReOrder, ColVis */
"bFilter": true, /* Use custom filters, i have to revise this as I am doing the drop down filter manually now */
"bSort": true,
"bAutoWidth": false,
"bProcessing": true, /* Needed, Read Datatables documentation */
"bServerSide": true, /* Needed, Read Datatables documentation */
"aaSorting": [[0, "desc"]], /* Initial Default Sorting on the First Column */
"sPaginationType": "full_numbers",
"fnServerData": function (sSource, aoData, fnCallback) {
/* Adding Custom Drop Down Filter property to aoData which will be used server side */
aoData.push({ name: "ddlStatus", value: $("#ddlStatus option:selected").text() });
/* Here I do the PageMethods call (ASP.NETs Ajax Replacement) PageMethods.getData
"getData" is a Server Side C# Method which looks like this:
[WebMethod]
public static string getData(List<oaData> aoData)
{
//Method Code
}
With page methods you pass in all your parameters matching the server side method,
And right at the end, add your two callback functions for onsuccess and onerror
*/
PageMethods.getData(aoData, function (obj) {
/* On Success, datatables fnCallback with JSON object */
fnCallback(JSON.parse(obj));
}, function (XMLHttpRequest, textStatus, errorThrown) {
/* On Error, show error alert */
alert(XMLHttpRequest.status + ': ' + XMLHttpRequest.responseText);
});
},
"aoColumns": [
/* This (JobNo) my first column which is Custom with 3 Images and a HyperLink to another page,
The last 5 Columns is hidden from the User because those fields are only used to
Render the correct images in this first column, Only used as Eval fields basically
Note that mDataProp is the GridView column's "DataField" and not the "HeaderText"
*/
{ "mDataProp": "JobNo",
"fnRender": function (oObj) {
return "<img src='" + (oObj.aData.HasAttachments ? "css/paperclip-icon.png" : "css/empty-icon.png") + "' height='16px' />"
+ "<a href='#' onclick=\"gotoJobDetail('" + oObj.aData.JobId + "');\">" + oObj.aData.JobNo + "</a>"
+ "<img src='" + (oObj.aData.Visited ? "css/yes.png" : "css/no.png") + "' height='16px' />"
+ "<img src='" + (oObj.aData.Completed ? "css/completed.png" : "css/notcompleted.png") + "' height='16px' />";
},
"bUseRendered": true /* This renders the Column in HTML first, else you'd see the actual HTML text in the column */
},
{ "mDataProp": "JobStatusName" },
{ "mDataProp": "StatusDateTime" },
/* Only used as Eval Field for one of the images in the JobNo Column */
{ "mDataProp": "HasAttachments",
"bSearchable": false,
"bVisible": false
},
/* Only used as Eval Field for one of the images in the JobNo Column */
{"mDataProp": "Visited",
"bSearchable": false,
"bVisible": false
},
/* Only used as Eval Field for one of the images in the JobNo Column */
{"mDataProp": "Completed",
"bSearchable": false,
"bVisible": false
},
/* Just Hidden, not used at the moment neither by the user nor the application */
{"mDataProp": "JobStatusId",
"bSearchable": false,
"bVisible": false
},
/* Only used as Eval Field for one of the images in the JobNo Column */
{"mDataProp": "JobId",
"bSearchable": false,
"bVisible": false
}
]
});
服务器端对象
//INCOMING OBJECT FROM CLIENTSIDE
public class oaData
{
public string name { get; set; }
public string value { get; set; }
}
//RETURNING OBJECT TO CLIENTSIDE
public class oaData<T>
{
public int sEcho { get; set; }
public int iTotalRecords { get; set; }
public int iTotalDisplayRecords { get; set; }
public T aaData { get; set; }
public string sColumns { get; set; }
}
//THIS IS 'T' IN oaData<T>
public class JobOverviewDynamic
{
public int JobNo { get; set; }
public string JobStatusName { get; set; }
public string StatusDateTime { get; set; }
public bool HasAttachments { get; set; }
public bool Visited { get; set; }
public bool Completed { get; set; }
public int JobStatusId { get; set; }
public int JobId { get; set; }
}
填充对象，然后JSON将其与Newtonsoft库进行字符串化并返回 这是我的Serverside方法
[WebMethod]
public static string getData(List<oaData> aoData)
{
/* The Columns array
* If the array from Parameters is not empty, then use that
*/
string[] aColumns = { "JobNo", "JobStatusName", "StatusDateTime", "HasAttachments", "Visited", "Completed", "JobStatusId", "JobId" };
var newCols = aoData.Where(n => n.name == "sColumns").Select(n => n.value).FirstOrDefault().Split(',');
aColumns = (newCols.Length == 1 && newCols[0] == "") ? aColumns : newCols;
/* Paging */
var iDisplayStart = aoData.Where(n => n.name == "iDisplayStart").Select(n => n.value).FirstOrDefault();
var iDisplayLength = aoData.Where(n => n.name == "iDisplayLength").Select(n => n.value).FirstOrDefault();
/* Ordering */
var sOrder = "";
var iSortCol_0 = aoData.Where(n => n.name == "iSortCol_0").Select(n => n.value).FirstOrDefault();
if (iSortCol_0 != null && aColumns.Length > 0)
{
sOrder = "ORDER BY ";
var iSortingCols = aoData.Where(n => n.name == "iSortingCols").Select(n => int.Parse(n.value)).FirstOrDefault();
for (int i = 0; i < iSortingCols; i++)
{
var iSortCol = aoData.Where(n => n.name == "iSortCol_" + i).Select(n => int.Parse(n.value)).FirstOrDefault();
var bSortable = aoData.Where(n => n.name == "bSortable_" + iSortCol).Select(n => bool.Parse(n.value)).FirstOrDefault();
if (bSortable)
{
var sSortDir = aoData.Where(n => n.name == "sSortDir_" + i).Select(n => n.value).FirstOrDefault();
sOrder += aColumns[iSortCol] + " " + sSortDir + ", ";
}
}
sOrder = sOrder.Trim();
sOrder = sOrder.Substring(sOrder.Length - 1) == "," ? sOrder.Substring(0, sOrder.Length - 1) : sOrder;
sOrder = (sOrder == "ORDER BY") ? "" : sOrder;
}
/* Filtering
*/
var sWhere = "";
var sSearch = aoData.Where(n => n.name == "sSearch").Select(n => n.value).FirstOrDefault();
var status = aoData.Where(n => n.name == "ddlStatus").Select(n => n.value).FirstOrDefault();
if (sSearch != "" && aColumns.Length > 0)
{
sWhere = "WHERE (";
for (int i = 0; i < aColumns.Count(); i++)
{
sWhere += aColumns[i] + " LIKE '%" + sSearch + "%'" + (i < aColumns.Count() - 1 ? " OR " : " ");
}
sWhere = sWhere.Trim() + ")";
}
/* Individual column filtering */
for (int i = 0; i < aColumns.Count(); i++)
{
var bSearchableCol = aoData.Where(n => n.name == "bSearchable_" + i).Select(n => bool.Parse(n.value)).FirstOrDefault();
var sSearchCol = aoData.Where(n => n.name == "sSearch_" + i).Select(n => n.value).FirstOrDefault();
if (bSearchableCol && sSearchCol != "")
{
sWhere = (sWhere == "") ? "WHERE " : sWhere + " AND ";
sWhere += aColumns[i] + " LIKE '%" + sSearchCol + "%' ";
}
/* Added this second if statement for my custom drop down filter on a specific column
* The fnFilter setting with a column number does not work, and this way, ColReorder will still work
*/
if (status != "" && aColumns[i] == "JobStatusName")
{
sWhere = (sWhere == "") ? "WHERE " : sWhere + " AND ";
sWhere += aColumns[i] + " = '" + status + "' ";
}
}
/* SQL queries
* Get data to display
*/
List<LTS.JobOverviewDynamicResult> data;
using (var m = new Methods())
{
//Im not giving my SQL query
data = m.getJobOverviewDynamicData(sWhere, sOrder, iDisplayStart, iDisplayLength);
}
int iFilteredTotal = 0;
int iTotal = 0;
if (data.Count() > 0)
{
/* Filtered dataset and Total dataset length */
iFilteredTotal = (int)data.FirstOrDefault().ITotalFiltered;
iTotal = (int)data.FirstOrDefault().ITotal;
}
/* Output */
var sEcho = aoData.Where(n => n.name == "sEcho").Select(n => int.Parse(n.value)).FirstOrDefault();
var output = new oaData<List<JobOverviewDynamic>>()
{
sEcho = sEcho,
iTotalRecords = iTotal,
iTotalDisplayRecords = iFilteredTotal,
aaData = data.Select(n => new JobOverviewDynamic()
{
JobNo = (int)n.JobNo,
JobStatusName = n.JobStatusName,
StatusDateTime = ((DateTime)n.StatusDateTime).ToString("yyyy-MM-dd hh:mm"),
HasAttachments = (bool)n.HasAttachments,
Visited = (bool)n.Visited,
Completed = (bool)n.Completed,
JobStatusId = (int)n.JobStatusId,
JobId = (int)n.JobId
}).ToList(),
sColumns = string.Join(",", aColumns)
};
return JsonConvert.SerializeObject(output);
}
我希望这有点意义，如果不是的话 - 我和我会协助。