How to separate Date and time from DateTime method in ASP.Net - sql

Question

I am writing my SQL query to insert date and time and I want to separate date and time from DateTime method now. I want to store them in a table of my database separately. How I could insert them separately, please guide me.
Here is my incorrect query:
string CheckRequest = "select count(*) from Requests where Date='"+DateTime.Now.ToString()+"'";

Answer 1

DateTime variables in .NET are not 'separable' in date and time parts. They always contains the date and the time (hence the name). What you probably need is to query the database using only the Date part of your query. You could reach your result converting your DateTime variable to a string with just the date part using a special formatting pattern for the ToString method when applied to a DateTime variable
string CheckRequest = #"select count(*) from Requests
where Date='" +DateTime.Now.ToString("yyyy-MM-dd")+"';
but this still leaves an open problem.
Passing a formatted string requires that you format it exactly as your database expects it. Failing to accurately represent the string leads to a failure in retrieving records in the datatable.
A better approach is letting your database engine figure out the Date value from a DateTime variable using a parameterized query.
Something like this
string CheckRequest = #"select count(*) from Requests
where Date=#myDate"
using(SqlConnection cn = new SqlConnection(.......))
using(SqlCommand cmd = new SqlCommand(CheckRequest, cn))
{
cn.Open();
cmd.Parameters.Add("#myDate", SqlDbType.Date).Value = DateTime.Now.ToDay;
object result = cmd.ExecuteScalar();
if(result != null)
{
int count = Convert.ToInt32(result);
MessageBox.Show("Record found=" + count.ToString());
}
else
MessageBox.Show("No Record found");
}
Here I am using a parameter of type Date and assign the Now.ToDay (still a DateTime value but with the time equals to 12:00:00 AM) The database engine now knows to use only the Date part and query your table correctly