无法从 asp.net c# 中的文本框中获取值

我有一个页面，它从数据库中获取所有员工的详细信息，并在文本框中显示数据，在我更改员工的详细信息后应该对其进行编辑

我的问题是它没有从文本框中获取要更新的值

这是我的文本框 aspx 代码

<div class="col-md-3"> First Name
                            <div class="input-group">
                                    <span class="input-group-addon"><i class="entypo-user"></i></span>

                                <asp:TextBox ID="fname" runat="server" CssClass="form-control"></asp:TextBox>
                                </div>
                        </div>

这是获取文本框值的代码：

protected void btn_update_Click(object sender, EventArgs e)
    {
        try
        {

            empenty.FirstName = fname.Text;
            empenty.LastName = txtlaname.Text;
            empenty.Gender = ddlselect.SelectedItem.Text;
            empenty.DateOfBirth = txtdob.Text;
            empenty.MobileNumber = txtmnumber.Text;
            empenty.AlternateNumber = txtanumber.Text;
            empenty.EmailId = txtemail.Text;
            empenty.AlternateEmail = txtaemail.Text;
            empenty.FatherName = txtfaname.Text;
            empenty.MotherName = txtmoname.Text;
            empenty.AadhaarCardNo = txtacno.Text;
            empenty.PanCardNo = txtpcno.Text;
            empenty.PassportNo = txtpassno.Text;
            empenty.UserName = txtuname.Text;
            empenty.Password = txtpwd.Text;
            empenty.RAddressLine1 = txtraline1.Text;
            empenty.RAddressLine2 = txtraline2.Text;
            empenty.RCity = txtrcity.Text;
            empenty.RState = txtrstate.Text;
            empenty.RZipCode = txtrzcode.Text;
            empenty.RCountry = txtrcountry.Text;
            empenty.PAddressLine1 = txtraline1.Text;
            empenty.PAddressLine2 = txtpaline2.Text;
            empenty.PCity = txtpcity.Text;
            empenty.PState = txtpstate.Text;
            empenty.PZipCode = txtpzcode.Text;
            empenty.PCountry = txtpcountry.Text;
            empenty.OAddressLine1 = txtoaline1.Text;
            empenty.OAddressLine2 = txtoaline2.Text;
            empenty.OCity = txtocity.Text;
            empenty.OState = txtostate.Text;
            empenty.OZipCode = txtozcode.Text;
            empenty.OCountry = txtocountry.Text;
            int update = bal.empudate(empenty, Convert.ToInt32(ViewState["empid"].ToString()));

            ScriptManager.RegisterStartupScript(this, this.GetType(), "popup", "alert(' Successfully updated!');window.location.href = 'Newemployee.aspx'", true);

        }
        catch (Exception ex)
        {

            throw ex;
        }
    }

我试过放置断点并在我将鼠标悬停在fname.Text它上面时检查代码，它显示了从数据库获取数据时存储的先前值。

同样，它没有从文本框中获取新值，而是显示每个文本框的先前值。

这是我的 page_load 代码：

protected void Page_Load(object sender, EventArgs e)
    {
        Get_emp_data_to_update();
        GetEmpSeq();

    }

这是 Get_emp_data_to_update() 的代码：

private void Get_emp_data_to_update()
    {
        ViewState["empid"] = empid = Convert.ToInt32(Request.QueryString["empid"].ToString());

        using (dtst = bal.Getempedit(empid))
        {
            fname.Text = dtst.Tables[0].Rows[0]["firstname"].ToString();
            txtlaname.Text = dtst.Tables[0].Rows[0]["Lastname"].ToString();
            ddlselect.SelectedValue = dtst.Tables[0].Rows[0]["Gender"].ToString();
            txtdob.Text = dtst.Tables[0].Rows[0]["DateofBirthday"].ToString();
            txtmnumber.Text = dtst.Tables[0].Rows[0]["Mobilenumber"].ToString();
            txtanumber.Text = dtst.Tables[0].Rows[0]["Alternatenumber"].ToString();
            txtemail.Text = dtst.Tables[0].Rows[0]["Emailid"].ToString();
            txtaemail.Text = dtst.Tables[0].Rows[0]["AlternateEmail"].ToString();
            txtfaname.Text = dtst.Tables[0].Rows[0]["Fathername"].ToString();
            txtmoname.Text = dtst.Tables[0].Rows[0]["Mothername"].ToString();
            txtacno.Text = dtst.Tables[0].Rows[0]["AadhaarCardNo"].ToString();
            txtpcno.Text = dtst.Tables[0].Rows[0]["PanCardNo"].ToString();
            txtpassno.Text = dtst.Tables[0].Rows[0]["PassportNo"].ToString();
            txtuname.Text = dtst.Tables[0].Rows[0]["UserName"].ToString();
            txtpwd.Text = dtst.Tables[0].Rows[0]["password"].ToString();
            txtraline1.Text = dtst.Tables[0].Rows[0]["RAddressLine1"].ToString();
            txtraline2.Text = dtst.Tables[0].Rows[0]["RAddressLine2"].ToString();
            txtrcity.Text = dtst.Tables[0].Rows[0]["RCity"].ToString();
            txtrstate.Text = dtst.Tables[0].Rows[0]["RState"].ToString();
            txtrzcode.Text = dtst.Tables[0].Rows[0]["RZipCode"].ToString();
            txtrcountry.Text = dtst.Tables[0].Rows[0]["RCountry"].ToString();
            txtpaline1.Text = dtst.Tables[0].Rows[0]["PAddressLine1"].ToString();
            txtpaline2.Text = dtst.Tables[0].Rows[0]["PAddressLine2"].ToString();
            txtpcity.Text = dtst.Tables[0].Rows[0]["PCity"].ToString();
            txtpstate.Text = dtst.Tables[0].Rows[0]["PState"].ToString();
            txtpzcode.Text = dtst.Tables[0].Rows[0]["PZipCode"].ToString();
            txtpcountry.Text = dtst.Tables[0].Rows[0]["PCountry"].ToString();
            txtoaline1.Text = dtst.Tables[0].Rows[0]["OAddressLine1"].ToString();
            txtoaline2.Text = dtst.Tables[0].Rows[0]["OAddressLine2"].ToString();
            txtocity.Text = dtst.Tables[0].Rows[0]["OCity"].ToString();
            txtostate.Text = dtst.Tables[0].Rows[0]["OState"].ToString();
            txtozcode.Text = dtst.Tables[0].Rows[0]["OZipCode"].ToString();
            txtocountry.Text = dtst.Tables[0].Rows[0]["OCountry"].ToString();
        }

    }