Grid view row editing with drop down list and text box in modal pop up using

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C#3.5

bootstrap

Gridview row editing in bootstrap.


On clicking of a edit button a modal pop up should appear and all grid row data should be in edit mode.
how to do using ajax call

What I have tried:

function Edit(RecordID) {
$.ajax({
url: 'GroupDoctors.aspx/GetDoctorByGroupCode?ts=' + $.now(),
contentType: 'application/json',
type: 'POST',
data: JSON.stringify({ id: RecordID }),
success: function (res) {

var obj = JSON.parse(res.d);
$('#<%=txtUpperLimit.ClientID%>').val(obj.UpperLimit);
$('#<%=txtLowerLimit.ClientID%>').val(obj.DownLimit);
},
error: function (err) {
}
});

}

How should i call my drop down here