edit,delete and update in gridview

<asp:GridView ID="GridviewTeams"
                runat="server"
                AutoGenerateColumns="false"
                OnRowUpdating="GV_RowUpdating"
                OnRowDeleting="GV_RowDeleting"
                OnRowEditing="GV_RowEditing"
                OnRowCancelingEdit="GV_RowCancelingEdit">
            <Columns>
                <asp:TemplateField HeaderText="ID">
                    <EditItemTemplate>
                        <asp:TextBox runat="server" ID="tbx_ID" >
                        </asp:TextBox>
                    </EditItemTemplate>
                    <ItemTemplate>
                        <asp:Label runat="server" ID="GV_lblTeamID" Text='<%# Eval("teamID") %>'></asp:Label>
                    </ItemTemplate>
                </asp:TemplateField>

                <asp:TemplateField HeaderText="Team Name">
                    <EditItemTemplate>
                        <asp:TextBox runat="server" ID="tbxEditTeamName" ></asp:TextBox>
                    </EditItemTemplate>
                    <ItemTemplate>
                        <asp:Label runat="server" ID="lblEditTeamName" Text='<%# Eval("team_name") %>'></asp:Label>
                    </ItemTemplate>
                </asp:TemplateField>

                <asp:TemplateField HeaderText="Team email">
                    <EditItemTemplate>
                        <asp:TextBox runat="server" ID="tbxEditTeamEmail" ></asp:TextBox>
                    </EditItemTemplate>
                    <ItemTemplate>
                        <asp:Label runat="server" ID="lbl_edit_stadium_adress"  Text='<%# Eval("team_email") %>'></asp:Label>
                    </ItemTemplate>
                </asp:TemplateField>

                <asp:TemplateField HeaderText="Commands" ShowHeader="False">
                    <EditItemTemplate>
                        <asp:LinkButton ID="LnkBtnUpdate" runat="server" CausesValidation="True"
                            CommandName="Update" Text="Update"></asp:LinkButton>
                        &nbsp;<asp:LinkButton ID="LnkBtnCancel" runat="server" CausesValidation="False"
                            CommandName="Cancel" Text="Cancel"></asp:LinkButton>
                    </EditItemTemplate>
                    <ItemTemplate>
                        <asp:LinkButton ID="LnkBtnEdit" runat="server" CausesValidation="False"
                            CommandName="Edit" Text="Edit"></asp:LinkButton>
                        &nbsp;<asp:LinkButton ID="LnkBtnDelete" runat="server" CausesValidation="False"
                            CommandName="Delete" Text="Delete"></asp:LinkButton>
                    </ItemTemplate>
                </asp:TemplateField>

            </Columns>
                </asp:GridView>

protected void Page_Load(object sender, EventArgs e)
      {
          Bind();
      }
      public void Bind()
      {
          try
          {
              CTeam cTeam = new CTeam();
              GridviewTeams.DataSource = cTeam.GetAllTeams();
              GridviewTeams.DataBind();
          }
          catch (Exception err)
          {
              Response.Write(err.Message);
          }
      }
      protected void BtnAdd_Click(object sender, EventArgs e)
      {
          CTeam cteam = new CTeam();
          cteam.AddTeams(tbxTeamName.Text,tbxTeamEmail.Text);
          Bind();
      }
      protected void GV_RowDeleting(object sender, GridViewDeleteEventArgs e)
      {
          CTeam cteam = new CTeam();
          int indexrow = e.RowIndex;
          short tid = short.Parse(((Label)GridviewTeams.Rows[indexrow].FindControl("GV_lblTeamID")).Text);
          cteam.DeleteTeams(tid);
          Bind();
      }
      protected void GV_RowEditing(object sender, GridViewEditEventArgs e)
      {
          GridviewTeams.EditIndex = e.NewEditIndex;
          Bind();
      }
      protected void GV_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
      {
          GridviewTeams.EditIndex = -1;
          Bind();
      }
      protected void GV_RowUpdating(object sender, GridViewUpdateEventArgs e)
      {
          CTeam cteam = new CTeam();
          int indexrow = e.RowIndex;
          string tname = ((TextBox)GridviewTeams.Rows[e.RowIndex].FindControl("tbxEditTeamName")).Text;
          string temail = ((TextBox)GridviewTeams.Rows[e.RowIndex].FindControl("tbxEditTeamEmail")).Text;
          cteam.UpdateTeams(tname, temail);

          GridviewTeams.EditIndex = -1;
          Bind();
      }
  }