我使用http://jtable.org/的最新版JTable(昨天下载)。我设置了我的JTable,如下所示(我还包括下面的服务器端代码,用C#编写)。 List函数有效(数据显示在表中),Add函数有效,Delete函数有效。但是,当我转到编辑一行时,尝试填充" ElevationsMulti"的数据时出错。领域。我得到一个错误,简单地说,"无法加载字段ElevationsMulti的选项。"
JTable代码:
$('#ReportsContainer').jtable({
title: 'Reports',
actions: {
listAction: '/Report_SingleEstimate/GetReportNames?customerId=' + customerId,
createAction: '/Report_SingleEstimate/AddReport',
updateAction: '/Report_SingleEstimate/EditReport',
deleteAction: '/Report_SingleEstimate/DeleteReport'
},
fields: {
ReportID: {
key: true,
list: false
},
ReportName: {
title: 'Report Name'
},
CustomerID: {
title: 'Customer',
list: false,
options: '/Estimates/GetCustomers',
defaultValue: customerId
},
PlanNameID: {
title: 'Plan Name',
dependsOn: 'CustomerID',
options: function (data) {
if (data.source == 'list') {
return '/Estimates/GetListOfPlanNames?customerId=0';
}
//data.source == 'edit' || data.source == 'create'
return '/Estimates/GetListOfPlanNames?customerId=' + data.dependedValues.CustomerID;
}
},
ProductID: {
title: 'Product',
options: '/Estimates/GetProducts'
},
HeaderFieldsMulti: {
title: 'Fields',
options: '/Report_SingleEstimate/GetHeaderFields',
type: 'multiselectddl',
list: false
},
ElevationsMulti: {
title: 'Elevations',
type: 'multiselectddl',
dependsOn: ['PlanNameID', 'ProductID'],
options: function (data) {
if (data.source == 'list') {
return '/Elevation/GetAllElevations';
}
return '/Report_SingleEstimate/GetElevations?PlanNameID=' + data.dependedValues.PlanNameID +
'&ProductID=' + data.dependedValues.ProductID;
},
list: false
}
}
});
$('#ReportsContainer').jtable('load');
不确定它是否会对JTable产生影响,但ElevationsMulti依赖于PlanNameID和ProductID字段,PlanNameID字段取决于CustomerID字段。换句话说,ElevationsMulti字段取决于依赖于另一个字段的字段(多个嵌套下拉列表)。
C#服务器端代码:
[HttpPost]
public JsonResult GetElevations(int PlanNameID, int ProductID)
{
try
{
int estimateId = Estimates.getEstimateId(PlanNameID, ProductID);
List<MyDropdownList> elevations = Estimate_ElevationList.listElevationsByEstimateForDropdown(estimateId);
return Json(new { Result = "OK", Options = elevations });
}
catch (Exception ex)
{
return Json(new { Result = "ERROR", Message = ex.Message });
}
}
错误:
进一步的调试给了我一个更具体的错误。
参数字典包含参数&#39; PlanNameID&#39;的空条目。非可空类型的System.Int32&#39; for method&#39; System.Web.Mvc.JsonResult GetElevations(Int32,Int32)&#39; in&#39; strol.Report_SingleEstimateController&#39;。可选参数必须是引用类型,可空类型,或者声明为可选参数。
基本上,JTable将PlanNameID作为空值发送到服务器。这似乎表明当JTable为ElevationsMulti字段调用服务器时,JTable尚未加载PlanNameID字段的选项。
如何在加载PlanNameID字段之前让JTable等待加载ElevationsMulti字段?
答案 0 :(得分:0)
问题解决了。
问题来自于在JTable中使用Type“multiselectddl”。我更改了JTable中的代码,该代码将multiselectddl创建为与常规下拉列表相同的代码。这是代码:
_createInputForRecordField: function (funcParams) {
...
//Create input according to field type
if (field.type == 'date') {
return this._createDateInputForField(field, fieldName, value);
} else if (field.type == 'textarea') {
return this._createTextAreaForField(field, fieldName, value);
} else if (field.type == 'password') {
return this._createPasswordInputForField(field, fieldName, value);
} else if (field.type == 'checkbox') {
return this._createCheckboxForField(field, fieldName, value);
} else if (field.options) {
if (field.type == 'multiselectddl') {
return this._createDropDownListMultiForField(field, fieldName, value, record, formType, form);
} else if (field.type == 'radiobutton') {
return this._createRadioButtonListForField(field, fieldName, value, record, formType);
} else {
return this._createDropDownListForField(field, fieldName, value, record, formType, form);
}
} else {
return this._createTextInputForField(field, fieldName, value);
}
},
_createDropDownListMultiForField: function (field, fieldName, value, record, source, form) {
//Create a container div
var $containerDiv = $('<div class="jtable-input jtable-multi-dropdown-input"></div>');
//Create multi-select element
var $select = $('<select multiple="multiple" class="' + field.inputClass + '" id="Edit-' + fieldName + '" name=' + fieldName + '></select>')
.appendTo($containerDiv);
var options = this._getOptionsForField(fieldName, {
record: record,
source: source,
form: form,
dependedValues: this._createDependedValuesUsingForm(form, field.dependsOn)
});
this._fillDropDownListWithOptions($select, options, value);
return $containerDiv;
}