一键保存和更新

问题描述

namespace RERMS.HR
{
    public partial class LateAttendance : System.Web.UI.Page
    {
        Button btnSave;
        protected void Page_Load(object sender, EventArgs e)
        {
            (this.Master as SiteMaster).SaveClicked += new EventHandler(Save_Click);
            (this.Master as SiteMaster).DeleteClicked += new EventHandler(Delete_Click);
            if (!IsPostBack)
            {  LoadGridView();
            }
            if (Request.QueryString["LateAttendanceApprovalID"] == null || Request.QueryString["LateAttendanceApprovalID"].ToString() == "")
            {}
            else if (Request.QueryString["LateAttendanceApprovalID"].ToString() != null || Request.QueryString["LateAttendanceApprovalID"].ToString() != "")
            {
                LateAttendanceApprovalForEdit();
            }
 }
 private void LateAttendanceApprovalForEdit()
        {
            btnSave = this.Master.FindControl("btnSave") as Button;
            if (btnSave.Text != "Update")
            {
                var LateRepository = new LateAttendanceRepository();
                var LateApprovalDto = new LateAttendanceApprovalDto();
                LateApprovalDto.LateAttendanceApprovalID = Convert.ToString(Request.QueryString["LateAttendanceApprovalID"]);
                LateApprovalDto = LateRepository.LoadLateAttendanceForEdit(LateApprovalDto).AttendanceApproval;
                txtApproveDate.Text = Convert.ToString(LateApprovalDto.ApprovalDate);
                txtArrivingTime.Text = Convert.ToString(LateApprovalDto.ArrivingTime);
                txtRemarks.Text = Convert.ToString(LateApprovalDto.Remarks);
                ddlEmployee.SelectedValue = LateApprovalDto.Employee.EmployeeID;
                btnSave.Text = "Update";
            }
        }

        private void LoadGridView()
        {
            LateAttendanceRepository LateRepository = new LateAttendanceRepository();
            LateRepository.LoadGridView(grdLateAttendance);

        }
void Save_Click(object sender, EventArgs e)
        {
            if (btnSave.Text == "Update")
            {
                UpdateLateAttendance();
            }
            else if (btnSave.Text == "Save")
            {
                SaveLateAttendance();
            }
             LoadGridView();
        }
        private void SaveLateAttendance()
        {
            var LateRepository = new LateAttendanceRepository();
            var LateApprovalDto = new LateAttendanceApprovalDto();
            var Company = new CompanyDto();
            var employeeDto = new EmployeeDto();
            var departmentDto = new DepartmentDto();
            LateApprovalDto.LateAttendanceApprovalID = "LT-10";
            LateApprovalDto.ApprovalDate = Convert.ToDateTime(txtApproveDate.Text);
            LateApprovalDto.ArrivingTime = Convert.ToDateTime(txtArrivingTime.Text); LateRepository.AddLateAttendance(LateApprovalDto);
        }
When i insert data then create this exception"Object reference not set to an instance of an object." Error line 81. because btnSave cant find value Update or Save.But i cant understand that.Sorry my poor English.
Source Error:

Line 79:         void Save_Click(object sender, EventArgs e)
Line 80:         {
Line 81:             if (btnSave.Text == "Update")
Line 82:             {
Line 83:                 UpdateAttendance();

请解决问题

pls solute the problem

推荐答案

void Save_Click(object sender, EventArgs e)
        {
            btnSave = this.Master.FindControl("btnSave") as Button;
            if (btnSave.Text == "Update")
            {
                UpdateLateAttendance();
            }
            else if (btnSave.Text == "Save")
            {
                SaveLateAttendance();
            }
             LoadGridView();
        }

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