ให้แสดงผล เช็คบ็อกคะ ช่วยหน่อยนะคะ ด่วนนนนนนนนนนะคะ ขอบคุณก่อนล่วงหน้าคะ

private void txtSearchReceive_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.KeyCode == Keys.Enter)
            {
                if (txtSearchReceive.Text.Trim() == "")
                {
                    return;
                }
                sb = new StringBuilder();
                sb.Remove(0, sb.Length);


                sb.Append("SELECT  ");
                sb.Append("RECEIVE_HEAD.ReceiveHeadId, ");
                sb.Append("RECEIVE_HEAD.ReceiveHeadDate, ");
                sb.Append("SHIPPER.ShipperName, ");
                sb.Append("SUPPLIER.SupplierName, ");
                sb.Append("PRODUCT.ProductId, ");
                sb.Append("PRODUCT.ProductName, ");
                sb.Append("RECEIVE_DETAIL.AmountProduct, ");
                sb.Append("UNITPACK.UnitPackName, ");
                sb.Append("RECEIVE_DETAIL.ReceiveDetailQuantity, ");
                sb.Append("UNITSALE.UnitSaleName, ");
                sb.Append("RECEIVE_DETAIL.ReceiveDetailPriceUnit, ");
                sb.Append("EMPLOYER.EmployerName ");

                sb.Append("FROM   RECEIVE_HEAD INNER JOIN ");
                sb.Append("RECEIVE_DETAIL ON ");
                sb.Append("RECEIVE_HEAD.ReceiveHeadId = RECEIVE_DETAIL.ReceiveHeadId ");
                sb.Append("INNER JOIN  PRODUCT ON ");
                sb.Append("RECEIVE_DETAIL.ProductId = PRODUCT.ProductId ");
                sb.Append("INNER JOIN SHIPPER ON ");
                sb.Append("RECEIVE_HEAD.ShipperId = SHIPPER.ShipperId ");
                sb.Append("INNER JOIN  SUPPLIER ON ");
                sb.Append("RECEIVE_DETAIL.SupplierId = SUPPLIER.SupplierId ");
                sb.Append("INNER JOIN EMPLOYER ON ");
                sb.Append("RECEIVE_HEAD.EmployerId = EMPLOYER.EmployerId ");
                sb.Append("INNER JOIN UNITSALE ON ");
                sb.Append("PRODUCT.UnitSaleId = UNITSALE.UnitSaleId ");
                sb.Append("INNER JOIN UNITPACK ON ");
                sb.Append("PRODUCT.UnitPackId = UNITPACK.UnitPackId ");

                    if (cboSearch_DataReceive.SelectedIndex == 0)
                    {
                        sb.Append(" WHERE (RECEIVE_HEAD.ReceiveHeadId=@ReceiveId)");
                    }

                     else if (cboSearch_DataReceive.SelectedIndex == 1)
                    {
                        sb.Append(" WHERE (SHIPPER.ShipperName LIKE @ShipperName)");
                    }
                    if (cboSearch_DataReceive.SelectedIndex == 2)
                    {
                        sb.Append(" WHERE (PRODUCT.ProductId=@ProductId)");
                    }
                     else if (cboSearch_DataReceive.SelectedIndex == 3)
                    {
                        sb.Append(" WHERE (PRODUCT.ProductName LIKE @ProductName)");
                    }
                    if (cboSearch_DataReceive.SelectedIndex == 4)
                    {
                        sb.Append(" WHERE (RECEIVE_HEAD.DrawId=@DrawId)");
                    }

                    sb.Append(" ORDER BY RECEIVE_HEAD.ReceiveHeadId ");

                    if (chkDateTime.Checked)
                    {
                        sb.Append("SELECT  ");
                        sb.Append("RECEIVE_HEAD.ReceiveHeadId, ");
                        sb.Append("RECEIVE_HEAD.ReceiveHeadDate, ");
                        sb.Append("SHIPPER.ShipperName, ");
                        sb.Append("SUPPLIER.SupplierName, ");
                        sb.Append("PRODUCT.ProductId, ");
                        sb.Append("PRODUCT.ProductName, ");
                        sb.Append("RECEIVE_DETAIL.AmountProduct, ");
                        sb.Append("UNITPACK.UnitPackName, ");
                        sb.Append("RECEIVE_DETAIL.ReceiveDetailQuantity, ");
                        sb.Append("UNITSALE.UnitSaleName, ");
                        sb.Append("RECEIVE_DETAIL.ReceiveDetailPriceUnit, ");
                        sb.Append("EMPLOYER.EmployerName ");

                        sb.Append("FROM   RECEIVE_HEAD INNER JOIN ");
                        sb.Append("RECEIVE_DETAIL ON ");
                        sb.Append("RECEIVE_HEAD.ReceiveHeadId = RECEIVE_DETAIL.ReceiveHeadId ");
                        sb.Append("INNER JOIN  PRODUCT ON ");
                        sb.Append("RECEIVE_DETAIL.ProductId = PRODUCT.ProductId ");
                        sb.Append("INNER JOIN SHIPPER ON ");
                        sb.Append("RECEIVE_HEAD.ShipperId = SHIPPER.ShipperId ");
                        sb.Append("INNER JOIN  SUPPLIER ON ");
                        sb.Append("RECEIVE_DETAIL.SupplierId = SUPPLIER.SupplierId ");
                        sb.Append("INNER JOIN EMPLOYER ON ");
                        sb.Append("RECEIVE_HEAD.EmployerId = EMPLOYER.EmployerId ");
                        sb.Append("INNER JOIN UNITSALE ON ");
                        sb.Append("PRODUCT.UnitSaleId = UNITSALE.UnitSaleId ");
                        sb.Append("INNER JOIN UNITPACK ON ");
                        sb.Append("PRODUCT.UnitPackId = UNITPACK.UnitPackId ");

                        sb.Append(" WHERE (RECEIVE_HEAD.ReceiveHeadDate BETWEEN @StartDateTime AND @EndDateTime)  ");


                        MessageBox.Show("แสดง");

                    }
               
                
                    string sqlSearch;
                    sqlSearch = sb.ToString();

                    dt = new DataTable();
                    com = new SqlCommand();
                    com.Parameters.Clear();

                    com.Parameters.Add("@StartDateTime", SqlDbType.DateTime).Value = dtStart.Value.ToString("dd/MM/yyyy");
                    com.Parameters.Add("@EndDateTime", SqlDbType.DateTime).Value = dtEnd.Value.ToString("dd/MM/yyyy");

                    if (cboSearch_DataReceive.SelectedIndex == 0)
                    {
                        com.Parameters.Add("@ReceiveId", SqlDbType.NVarChar).Value = txtSearchReceive.Text.Trim();
                    }
                    else if (cboSearch_DataReceive.SelectedIndex == 1)
                    {
                        com.Parameters.Add("@ShipperName", SqlDbType.NVarChar).Value = "%" + txtSearchReceive.Text.Trim() + "%";
                    }
                    else if (cboSearch_DataReceive.SelectedIndex == 2)
                    {
                        com.Parameters.Add("@ProductId", SqlDbType.NVarChar).Value = txtSearchReceive.Text.Trim();
                    }
                    else if (cboSearch_DataReceive.SelectedIndex == 3)
                    {
                        com.Parameters.Add("@ProductName", SqlDbType.NVarChar).Value = "%" + txtSearchReceive.Text.Trim() + "%";
                    }
                    else if (cboSearch_DataReceive.SelectedIndex == 4)
                    {
                        com.Parameters.Add("@DrawId", SqlDbType.NVarChar).Value = txtSearchReceive.Text.Trim();
                    }
                
                com.CommandText = sqlSearch;
                com.CommandType = CommandType.Text;
                com.Connection = Conn;
                dr = com.ExecuteReader();

                if (dr.HasRows)
                {

                    dt.Load(dr);  //  ให้ dt โหลดข้อมูลออกมา 
                    CheckResult = dt.Rows.Count;

                    dgvReceiveHistoryMain.DataSource = dt;  // แสดงรายชื่อ  ลงไปยัง dgv unit ( Datagrid view)
                    FormatDgvReceiveHistoryMain();
                }
                else
                {
                    CheckResult = 0;
                    dgvReceiveHistoryMain.DataSource = null; // ล้างข้อมูลออก
                }

                txtSearchReceive.Focus();
                txtSearchReceive.SelectAll();
                lblReceiveHistoryMain.Text = "พบ : " + CheckResult.ToString() + " รายการ จากการค้นหาคำว่า " + txtSearchReceive.Text + "";
                dr.Close();
            }
        }