How to put datetimepicker control in query in C#

Hi all,

Iam creating one report in c# where having one combobox which is contain Daily,Weekly

Monthly,HalfYearly,Yearly items if user select in combobox any of them item then in datagridview show respective data as per selection in combobox, as of now its working fine for me but my project manager want dateTime picker option in front end , so if user selected combobox item as weekly and startdate(from datepicker):11/03/2016 and enddate(fromdatetimepicker) as 15/03/2016 so he can get that releted data into datagridview im using access database for this and having only one column Date from using that column only i have to show details i was tried my end but not happening iam putting a code here just tell me how i use datetimepicker option in that

if (comboBox1.SelectedItem.ToString() == "Weekly")

{

string connetionString = null;

connetionString = ConfigurationManager.ConnectionStrings["AccessConnectionString"].ConnectionString;

cnn.ConnectionString = connetionString;

string sql = "SELECT * FROM Billing where Date Between Date() and Date()-6";

OleDbConnection connection = new OleDbConnection(connetionString);

OleDbDataAdapter dataadapter = new OleDbDataAdapter(sql, connection);

DataSet ds = new DataSet();

connection.Open();

dataadapter.Fill(ds, "Billing");

connection.Close();

dataGridView1.DataSource = ds;

dataGridView1.DataMember = "Billing";

}

else if (comboBox1.SelectedItem.ToString() == "Monthly")

{

string connetionString = null;

connetionString = ConfigurationManager.ConnectionStrings["AccessConnectionString"].ConnectionString;

cnn.ConnectionString = connetionString;

string sql = "SELECT * FROM Billing where Year([Date]) = Year(Now()) And Month([Date]) = Month(Now())";

OleDbConnection connection = new OleDbConnection(connetionString);

OleDbDataAdapter dataadapter = new OleDbDataAdapter(sql, connection);

DataSet ds = new DataSet();

connection.Open();

dataadapter.Fill(ds, "Billing");

connection.Close();

dataGridView1.DataSource = ds;

dataGridView1.DataMember = "Billing";

}

else if (comboBox1.SelectedItem.ToString() == "HalfYearly")

{

string connetionString = null;

connetionString = ConfigurationManager.ConnectionStrings["AccessConnectionString"].ConnectionString;

cnn.ConnectionString = connetionString;

string sql = "SELECT * FROM Billing where Year([Date]) = Year(Now()) And DatePart('h', [Date]) = DatePart('h', Now())";

OleDbConnection connection = new OleDbConnection(connetionString);

OleDbDataAdapter dataadapter = new OleDbDataAdapter(sql, connection);

DataSet ds = new DataSet();

connection.Open();

dataadapter.Fill(ds, "Billing");

connection.Close();

dataGridView1.DataSource = ds;

dataGridView1.DataMember = "Billing";

}

else if (comboBox1.SelectedItem.ToString() == "Yearly")

{

string connetionString = null;

connetionString = ConfigurationManager.ConnectionStrings["AccessConnectionString"].ConnectionString;

cnn.ConnectionString = connetionString;

string sql = "SELECT * FROM Billing where Year([Date]) = Year(Date())";

OleDbConnection connection = new OleDbConnection(connetionString);

OleDbDataAdapter dataadapter = new OleDbDataAdapter(sql, connection);

DataSet ds = new DataSet();

connection.Open();

dataadapter.Fill(ds, "Billing");

connection.Close();

dataGridView1.DataSource = ds;

dataGridView1.DataMember = "Billing";

}

Actually i want only how i will add Start_date(datetimepicker1) and end_date(datetimePicker2) in below query

SELECT * FROM Billing where Date Between Date() and Date()-6 --Weekly

SELECT * FROM Billing where Year([Date]) = Year(Now()) And Month([Date]) = Month(Now()) --monthly

SELECT * FROM Billing where Year([Date]) = Year(Now()) And DatePart('h', [Date]) = DatePart('h', Now()) --"HalfYearly"

SELECT * FROM Billing where Year([Date]) = Year(Date())-- "Yearly"