How to declare the array of objects

Complete code with the solution:
 
 

// Define the payload as a string
string payload = @"
{
    contractInvoicePerDayID : '1061, 1135',
    invoiceObj : ['2023-04-24T04:37:45', '2023-04-24T04:37:45']
}";

// Use Newtonsoft.Json to deserialize the payload into a dynamic object
dynamic payloadObj = JsonConvert.DeserializeObject(payload);

// Extract the contractInvoicePerDayID property and split it into a list of integers
List contractInvoicePerDayIDs = ((string)payloadObj.contractInvoicePerDayID).Split(',').Select(int.Parse).ToList();

// Extract the invoiceObj property as a list of DateTime objects
List invoiceObj = ((JArray)payloadObj.invoiceObj).Select(d => DateTime.Parse((string)d)).ToList();

// Use the extracted data in your code
int? baseStateProvinceID = null;
if (contractInvoicePerDayIDs.Count == 1)
{
    baseStateProvinceID = staffCIPDApprovedViewModel.BaseStateProvinceID;
}

CIPDPushReqMod timeCardPushRequest = new CIPDPushReqMod();
using (SqlConnection connection = new SqlConnection(db.Database.Connection.ConnectionString))
{
    try
    {
        using (SqlCommand command = new SqlCommand("spGetCIPDForPushToLawson", connection))
        {
            command.CommandType = CommandType.StoredProcedure;
            command.Parameters.Add("@ContractInvoicePerDayIDs", SqlDbType.NVarChar).Value = string.Join(",", contractInvoicePerDayIDs);
            if (connection.State != ConnectionState.Closed)
            {
                connection.Close();
            }
            connection.Open();
            using (var reader = command.ExecuteReader())
            {
                timeCardPushRequest.TimeCardLst = ((IObjectContextAdapter)db).ObjectContext.Translate(reader).ToList();
                reader.NextResult();
                timeCardPushRequest.AdditionalComponents = ((IObjectContextAdapter)db).ObjectContext.Translate(reader).ToList();
            }
        }
    }
    catch (Exception)
    {
    }
    finally
    {
        if (connection.State != ConnectionState.Closed)
        {
            connection.Close();
        }
    }
}

In this code, first deserialize the payload into a dynamic object using Newtonsoft.Json. Then, extract the contractInvoicePerDayID property and split it into a list of integers using LINQ's `Select` and `ToList` methods. Next, extract the invoiceObj property as a list of DateTime objects using a combination of LINQ's `Select` and `ToList` methods, as well as DateTime.Parse. I used the extracted data in your code as before, but with one modification: join the `contractInvoicePerDayIDs` list into a comma-separated string and pass it as a parameter value to the SqlCommand.

List invoiceObj = new List
{
    DateTime.Parse("2023-04-24T04:37:45"),
    DateTime.Parse("2023-04-24T04:37:45")
};

CIPDPushReqMod timeCardPushRequest = new CIPDPushReqMod();
timeCardPushRequest.TimeCardLst = invoiceObj.Select(x => new CIPDPushReqObj { InvoiceDate = x }).ToList();