To answer your first question, yes, the datatable parameters should bind automatically to the DataTableAjaxPostModel class when it's sent to the Postdata method via the HTTP POST request.
Regarding your second question, the code seems okay, but there are a few things that can be improved. For example, the using statement is not necessary for the HttpClient instance because it's already managed by the ASP.NET Core Dependency Injection container. Also, you should use the ActionResult<t> instead of ActionResult for returning data from your controller actions.
Here's a modified version of your code that takes into account the points mentioned above:
C#
[HttpPost]
[Route("Plots/Postdata")]
public async Task<ActionResult<string>> Postdata([FromForm] DataTableAjaxPostModel model)
{
using var client = new HttpClient();
client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
var body = new StringContent(JsonConvert.SerializeObject(model), Encoding.UTF8, "application/json");
var response = await client.PostAsync("https://localhost:7193/api/Erven", body);
if (response.IsSuccessStatusCode)
{
var content = await response.Content.ReadAsStringAsync();
return Ok(content);
}
return NotFound();
}
Regarding your third question, the code also seems okay. However, you might want to consider using a view model instead of returning an anonymous object. This can help improve the readability and maintainability of your code.
Here's an example of how you could modify the Getdata method to use a view model:
C#
public class DataTableResultViewModel<T>
{
public int Draw { get; set; }
public int RecordsTotal { get; set; }
public int RecordsFiltered { get; set; }
public List<T> Data { get; set; }
}
[HttpPost]
public async Task<ActionResult<DataTableResultViewModel<Progressreport>>> Getdata([FromBody] DataTableAjaxPostModel model)
{
var searchValue = model?.search?.value;
var draw = model.draw ?? 0;
var start = model.start ?? 0;
var length = model.length ?? 0;
var sortColumn = model.columns[model.order[0].column]?.name;
var sortColumnDirection = model.order?[0].dir;
var pageSize = length != 0 ? length.Value : 0;
var skip = start != 0 ? start.Value : 0;
var filteredRecords = 0;
var query = this._UoW.Repository<Progressreport>().Query();
if (!string.IsNullOrEmpty(sortColumn) && !string.IsNullOrEmpty(sortColumnDirection))
{
query = query.OrderBy(sortColumn + " " + sortColumnDirection);
}
if (!string.IsNullOrEmpty(searchValue))
{
query = query.Where(p => p.Inspector.ToLower().Contains(searchValue.ToLower()) ||
p.Projectname.ToLower().Contains(searchValue.ToLower()) ||
p.Plot.ToString().ToLower().Contains(searchValue.ToLower()) ||
p.Status.ToLower().Contains(searchValue.ToLower()));
}
var recordsTotal = await query.CountAsync();
var data = await query.Skip(skip).Take(pageSize).ToListAsync();
filteredRecords = data.Count();
var result = new DataTableResultViewModel<Progressreport>
{
Draw = draw,
RecordsTotal = recordsTotal,
RecordsFiltered = filteredRecords,
Data = data
};
return Ok(result);
}
Finally, regarding your last question, the jQuery datatable script seems fine, but you might want to change the "sAjaxSource" parameter to "ajax" since it's the recommended way of specifying the data source. Also, you should add error handling code to the bindDatatable function to handle any errors that may occur during the data retrieval process. You can use the error parameter in the DataTable initialization to handle any errors that occur during the data retrieval process. Here's an example of how you can add error handling to the bindDatatable function:
lua
function bindDatatable() {
datatable = $('#tblStudent').DataTable({
"ajax": {
"url": "Plots/Postdata",
"type": "POST",
"dataType": "json"
},
"serverSide": true,
"processing": true,
"searching": true,
"order": [[1, 'asc']],
"language": {
"emptyTable": "No record found.",
"processing": 'Loading...'
},
"columns": [
{ "data": "plot", "autoWidth": true },
{ "data": "status", "autoWidth": true },
{ "data": "contractor", "autoWidth": true },
{ "data": "inspector", "autoWidth": true }
],
"error": function (xhr, error, thrown) {
alert("Error occurred while loading data. Please try again.");
}
});
}
This code adds an error function to the DataTable initialization that displays an error message in case an error occurs during the data retrieval process. You can customize this function to handle errors in a way that suits your requirements.
Submit an article or tip