发送选定的jquery datatables行到服务器端c＃asp.net

Question

function Delete() 
     {
         var iTable = $('#Dims').DataTable();
         var rows = iTable.rows('.selected').indexes();             
         document.getElementById('<%=hdnRows.ClientID %>') = rows;  

     }

I am trying to get the rows selected in the datatable and put it into a hidden field named hdnRows so I can delete the selected rows from a list I am using to populate the datatable. I am not sure what type the rows variable is since it can contain several indexes (it must be a array).

I tried using a for loop and running through the variable rows and adding it to hdnRows in a comma delimited string.

 for (var i = 0; i < length; i++) {
             document.getElementById('<%=hdnRows.ClientID %>') += rows[i] + ',';
         }

This didn't put anything into the hidden field either. I even tried hard coding a number in just to see if it would work

document.getElementById('<%=hdnRows.ClientID %>') = '3'; 

I am executing a javascript function called delete from the onclientclick method of asp button.

<asp:Button ID="btnDelete" runat="server" OnClientClick="Delete()" Text="Del" />

Everything I read says this should work. If anyone answers the question be sure to indicate the data type of var rows.

Once on the server side I just need to delete the selected rows from a

List<structs>

I am using to populate table

Answer 1

I was very close.

document.getElementById('<%=hdnRows.ClientID %>').value = rows[0].toString();

The main things to remember are

1. You need the .value after you get the element(hidden field) by id. Be sure to use small v not capital V as the latter won't work and on the server side it's capital V

2. The hidden field stores a string so be sure to ad the .toString() method if your using a number.

On a side note the rows variable is an array.