การค้นหาจากวันที่ จาก test ที่เลือกวันที่ได้ ต้องทำอย่างไรบ้างครับ

 private void search()
        {
            dataGridView1.DataSource = null;
            // Set Column
            DataGridViewTextBoxColumn  c01 = new DataGridViewTextBoxColumn()  { DataPropertyName = "receive_no", HeaderText = "receive_no",Width=100  };
            DataGridViewTextBoxColumn  c02 = new DataGridViewTextBoxColumn()  { DataPropertyName = "invoice_no", HeaderText = "invoice_no" };
            DataGridViewTextBoxColumn  c03 = new DataGridViewTextBoxColumn()  { DataPropertyName = "product_code", HeaderText = "product_code" };
            DataGridViewTextBoxColumn  c04 = new DataGridViewTextBoxColumn()  { DataPropertyName = "add_date", HeaderText = "add_date", Width = 120 };
            DataGridViewTextBoxColumn  c05 = new DataGridViewTextBoxColumn()  { DataPropertyName = "product_name", HeaderText = "product_name" ,Width = 180 };
            DataGridViewTextBoxColumn  c06 = new DataGridViewTextBoxColumn()  { DataPropertyName = "product_unit_name", HeaderText = "product_unit_name" };
            DataGridViewTextBoxColumn  c07 = new DataGridViewTextBoxColumn()  { DataPropertyName = "remark", HeaderText = "remark"};
            DataGridViewTextBoxColumn  c08 = new DataGridViewTextBoxColumn()  { DataPropertyName = "quantity", HeaderText = "quantity" };
            DataGridViewComboBoxColumn c09 = new DataGridViewComboBoxColumn() { DataPropertyName = "receive_type_id", HeaderText = "receive_type_id", DataSource = GetTable("select * from receives_types"), DisplayMember = "name", ValueMember = "id", Width = 120 };
            DataGridViewComboBoxColumn c10 = new DataGridViewComboBoxColumn() { DataPropertyName = "supplier_id", HeaderText = "supplier_id", DataSource = GetTable("select * from suppliers"), DisplayMember = "company_name", ValueMember = "id" };

// Add Column
            dataGridView1.Columns.AddRange(c01, c02, c03, c05, c06, c07, c08, c09, c10, c04);
// Set DataSource   
            dataGridView1.DataSource = GetTable2(
  "select receive_no,invoice_no,product_code,(receive_details.remark),product_name,product_unit_name,quantity,receive_type_id,supplier_id,(receives.add_date) FROM receive_details JOIN receives ON receives.id=receive_details.receive_id join stock_incomings on stock_incomings.receive_detail_id=receive_details.id where receives.add_date like'" + textdate1.Text + "%' ");
           
        }
        private DataTable GetTable2(String SQL)
        {
            if (conn.State == ConnectionState.Closed)
                conn.Open();
            SqlDataAdapter sda1 = new SqlDataAdapter(SQL, conn);
            DataTable dt1 = new DataTable();
            sda1.Fill(dt1);
            return dt1; 
        }