NullReferenceException was unhandled by user code

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ASP.NET

WebAPI

client side code



<script>
var obj = [];
jQuery.support.cors = true;
$(document).ready(function () {

$("#btnLoginquerystring").click
(
function () {
var value1 = $("#txtValue1").val();
var value2 = $("#txtValue2").val();
var arg = "info1=" + value1 + "&info2=" + value2;
$.ajax({
url: "http://localhost:9320/api/UpdateKYC?" + arg,
type: "Get",
dataType: "json",
async: true,
traditional: true,
success: function (data) {
$('#usersection').empty();
for (var i = 0; i < data.length; i++) {
obj[i] = new Object;
obj[i].CenterCode = data[i].CenterCode;
obj[i].LoanCode = data[i].LoanCode;
obj[i].ClientCode = data[i].ClientCode;
obj[i].ClientName = data[i].ClientName;
obj[i].DateApproved = data[i].DateApproved;
obj[i].LoanStatus = data[i].LoanStatus;

$('' + data[i].CenterCode + '' + obj[i].LoanCode + '' + obj[i].ClientCode + '' + obj[i].ClientName + '' + data[i].DateApproved + '' + obj[i].LoanStatus + '').appendTo("#usersection");
}
},
error: function (msg) { alert(msg); }
});
}
);
$("#btnLoginobj").click
(
function () {

var StaffCode = $("#txtValue1").val();
var Password = $("#txtValue2").val();
$.ajax({
url: "http://localhost:9320/api/UpdateKYC",
type: "Get",
data: JSON.stringify([StaffCode,Password]),
success: function (data) {
$('#usersection').empty();
for (var i = 0; i < data.length; i++) {
obj[i] = new Object;
obj[i].CenterCode = data[i].CenterCode;
obj[i].LoanCode = data[i].LoanCode;
obj[i].ClientCode = data[i].ClientCode;
obj[i].ClientName = data[i].ClientName;
obj[i].DateApproved = data[i].DateApproved;
obj[i].LoanStatus = data[i].LoanStatus;

$('' + data[i].CenterCode + '' + obj[i].LoanCode + '' + obj[i].ClientCode + '' + obj[i].ClientName + '' + data[i].DateApproved + '' + obj[i].LoanStatus + '').appendTo("#usersection");
}
},
error: function (msg) { alert(msg); }
});
}
);

});

function uploadkyc(index)
{
alert("hello:- " + obj[index].LoanCode);

}

</script>





server side code

public List<clientliststructure> GetDetail(string info1, string info2)
{
// LoginSructure objLoginStructure=new LoginSructure();
//objLoginStructure.StaffCode = "11383";
//objLoginStructure.Password = "1234";
try
{
//string info = "11014 123";
// string[] words = info.Split(' ');
string connectionstring = ConfigurationManager.ConnectionStrings["ConnectionStrig"].ConnectionString;
SqlConnection con = new SqlConnection(connectionstring);
SqlCommand cmd = new SqlCommand("select BranchCode from Staff where StaffCode='" + info1 + "' and Password='" + info2 + "'", con);
con.Open();
SqlDataReader reader = cmd.ExecuteReader();
while (reader.Read())
{
BranchCode = reader.GetString(0);
}
reader.Close();
cmd.Dispose();
con.Close();
ObjclientList = new MapClientDatatoModel().Mapclientlist(BranchCode);
return ObjclientList;
}
catch (Exception ex)
{
return ObjclientList;
}

}


public List<clientliststructure> GetDetail(List<string> val)
{
LoginSructure objLoginStructure=new LoginSructure();
objLoginStructure.StaffCode =val[0];
objLoginStructure.Password = val[1];
try
{
//string info = "11014 123";
// string[] words = info.Split(' ');
string connectionstring = ConfigurationManager.ConnectionStrings["ConnectionStrig"].ConnectionString;
SqlConnection con = new SqlConnection(connectionstring);
SqlCommand cmd = new SqlCommand("select BranchCode from Staff where StaffCode='" + objLoginStructure.StaffCode + "' and Password='" + objLoginStructure.Password + "'", con);
con.Open();
SqlDataReader reader = cmd.ExecuteReader();
while (reader.Read())
{
BranchCode = reader.GetString(0);
}
reader.Close();
cmd.Dispose();
con.Close();
ObjclientList = new MapClientDatatoModel().Mapclientlist(BranchCode);
return ObjclientList;
}
catch (Exception ex)
{
return ObjclientList;
}

}

Error Description

whren we click button "btnLoginquerystring" it work fine because we use querystring to paas data in web Api method.but when click on button "btnLoginobj" its show error "NullReferenceException was unhandled by user code" in
public List<clientliststructure> GetDetail(List<string> val)
{
LoginSructure objLoginStructure=new LoginSructure();
objLoginStructure.StaffCode =val[0];->NullReferenceException was unhandled by user code
objLoginStructure.Password = val[1];