Winforms have two combobox in click of a button i should display result

public void DisplayEmployee()
        {
            //try
            //{
                dtObj.Clear();
                flowLayoutPanel1.Controls.Clear();
                string s = CmbShiftdetails.Text;//.SelectedItem.ToString();
                string sql_displayemp = string.Format("SELECT EmployeeMaster.EmployeeId, EmployeeMaster.EmployeeCode, EmployeeMaster.EmployeeName, EmployeeMaster.Address, EmployeeMaster.PhoneNo, EmployeeMaster.Emailid, EmployeeMaster.Designation, EmployeeMaster.Photo, DepartmentMaster.DepartmentId, DepartmentMaster.DepartmentName, ShiftMaster.ShiftId, ShiftMaster.ShiftName FROM DepartmentMaster INNER JOIN EmployeeMaster ON DepartmentMaster.DepartmentId = EmployeeMaster.DepartmentId INNER JOIN ShiftMaster ON EmployeeMaster.ShiftId = ShiftMaster.ShiftId where ShiftMaster.ShiftName='{0}' and DepartmentMaster.DepartmentName='{1}'", CmbShiftdetails.Text, CmbDepartment.Text);
                
               
                
                dtObj = obj.NonTransaction(sql_displayemp);
                if (dtObj.Rows.Count > 0)
                {
                    TableLayoutPanel tlpobj = new TableLayoutPanel();
                    tlpobj.Name = "Emp";
                    tlpobj.CellBorderStyle = TableLayoutPanelCellBorderStyle.OutsetDouble;
                    tlpobj.AutoSize = true;
 
                    string[] headers = { "EmployeeCode", "EmployeeName", "Address", "PhoneNo", "Emailid", "Designation", "Photo", "Edit", "Delete" };
                    for (int i = 0; i < headers.Length; i++)
                    {
                        Label lbl = new Label();
                        lbl.Text = headers[i];
                        tlpobj.Controls.Add(lbl, i, 0);
                    }
                    for (int i = 0; i < dtObj.Rows.Count; i++)
                    {
                        Button btnedit = new Button();
                        btnedit.Text = "Edit";
                        btnedit.Name = "e_" + dtObj.Rows[i]["EmployeeId"].ToString();
                        btnedit.Click += new EventHandler(btnedit_Click);
                        btnedit.Width = 60;
 
                        Button btndelete = new Button();
                        btndelete.Text = "Delete";
                        btndelete.Name = "d_" + dtObj.Rows[i]["EmployeeId"].ToString();
                        btndelete.Click += new EventHandler(btndelete_Click);
                        btndelete.Width = 60;
 
                        Label lblempid = new Label();
                        lblempid.Text = dtObj.Rows[i]["EmployeeId"].ToString();
                        lblempid.Name = "lblempid" + dtObj.Rows[i]["EmployeeId"].ToString();
                        lblempid.Visible = false;
 
                        Label lblempcode = new Label();
                        lblempcode.Text = dtObj.Rows[i]["EmployeeCode"].ToString();
                        lblempcode.Name = "lblempcode" + dtObj.Rows[i]["EmployeeId"].ToString();
 
                        Label lblempname = new Label();
                        lblempname.Text = dtObj.Rows[i]["EmployeeName"].ToString();
                        lblempname.Name = "lblempname" + dtObj.Rows[i]["EmployeeId"].ToString();
 
                        Label lbladdress = new Label();
                        lbladdress.Text = dtObj.Rows[i]["Address"].ToString();
                        lbladdress.Name = "lbladdress" + dtObj.Rows[i]["EmployeeId"].ToString();
 
                        Label lblphone = new Label();
                        lblphone.Text = dtObj.Rows[i]["PhoneNo"].ToString();
                        lblphone.Name = "lblphone" + dtObj.Rows[i]["EmployeeId"].ToString();
 
                        Label lblemail = new Label();
                        lblemail.Text = dtObj.Rows[i]["Emailid"].ToString();
                        lblemail.Name = "lblemail" + dtObj.Rows[i]["EmployeeId"].ToString();
 
                        Label lbldesignation = new Label();
                        lbldesignation.Text = dtObj.Rows[i]["Designation"].ToString();
                        lbldesignation.Name = "lbldesignation" + dtObj.Rows[i]["EmployeeId"].ToString();
 
                        
                        
 
                        PictureBox pbemp = new PictureBox();
                        pbemp.SizeMode = PictureBoxSizeMode.StretchImage;
                        try
                        {
                            pbemp.Image = Image.FromStream(new MemoryStream(((byte[])dtObj.Rows[i]["Photo"])));
                        }
                        catch { }
                        pbemp.Name = "pbemp" + dtObj.Rows[i]["EmployeeId"].ToString();
 
                        ["EmployeeId"].ToString();
 
                       ["EmployeeId"].ToString();
                        // tlpobj.Controls.Add(lblempid, 0, i + 1);
                        tlpobj.Controls.Add(lblempcode, 0, i + 1);
                        tlpobj.Controls.Add(lblempname, 1, i + 1);
                        tlpobj.Controls.Add(lbladdress, 2, i + 1);
                        tlpobj.Controls.Add(lblphone, 3, i + 1);
                        tlpobj.Controls.Add(lblemail, 4, i + 1);
                        tlpobj.Controls.Add(lbldesignation, 5, i + 1);
                        //tlpobj.Controls.Add(lblemail, 4, i + 1);
                        tlpobj.Controls.Add(pbemp, 6, i + 1);
                        //tlpobj.Controls.Add(lbltagid, 6, i + 1);
                        // tlpobj.Controls.Add(lblshiftid, 7, i + 1);
                        tlpobj.Controls.Add(btnedit, 7, i + 1);
                        tlpobj.Controls.Add(btndelete, 8, i + 1);
                    }
 
                    flowLayoutPanel1.Controls.Add(tlpobj);
                    flowLayoutPanel1.Refresh();
 
                }
private void BtnGo_Click(object sender, EventArgs e)
        {
            DisplayEmployee();
        }