重新绑定时Gridview变形了

Question

我已将gridview绑定到数据库，并在TICKER事件中加载。它运作良好，但问题是，当它重新绑定时，GIRDVIEW的布局和形状变得不正确和不安，有点混乱。

<asp:GridView ID="GridViewSmsComplaints" AllowPaging="True" PageSize="4" runat="server" AutoGenerateColumns="False" CssClass="mGrid" BorderColor="#333333"  Width="550px" OnRowDataBound="GridViewSmsComplaints_RowDataBound" OnPageIndexChanging="GridViewSmsComplaints_PageIndexChanging" >
               <Columns>
                    <asp:BoundField HeaderText="ID" DataField="ID" /> 
                    <asp:BoundField HeaderText="Recieving Date" DataField="RecievingDate" />  
                    <%--<asp:BoundField HeaderText="ToMobileNo" DataField="ToMobileNo" />  --%>
                    <asp:BoundField HeaderText="FromMobileNo" DataField="FromMobileNo" /> 
                    <asp:BoundField HeaderText="Message" DataField="Message" >   
                     <ItemStyle Wrap="True" />
                    </asp:BoundField>
                    <asp:TemplateField HeaderText="IsComplaint">
                     <ItemTemplate>
                       <asp:CheckBox ID="ckboxIsComplaint"  runat="server" />
                     </ItemTemplate>
                    </asp:TemplateField>
               </Columns>
            </asp:GridView>    
            <asp:Timer runat="server" Interval="20000" ID="RefreshSmsComplaints" OnTick="RefreshSmsComplaints_Tick" />
          </ContentTemplate>
         </asp:UpdatePanel>

股票代码：

 protected void RefreshSmsComplaints_Tick(object sender, EventArgs e)
    {
        // ReportViewer1.Visible = false;
        foreach (GridViewRow row in GridViewSmsComplaints.Rows)
        {
            CheckBox checkbox = (CheckBox)row.FindControl("ckboxIsComplaint");

            if (checkbox.Checked == true)
            {
                CheckedRows.Add(row.RowIndex);
            }
            else
            {
                CheckedRows.Remove(row.RowIndex);
            }
        }

        try
        {
            DateTime fromDate = DateTime.ParseExact(txtFromDate.Text, "dd/MMM/yyyy", null);
            DateTime toDate = DateTime.ParseExact(txtToDate.Text, "dd/MMM/yyyy", null);
            DataTable dt = ManageRecievedMessage.GetSmsComplaintsByDate(fromDate, toDate);
            //GridViewSmsComplaints.Attributes.Add("style", "word-break:keep-all;word-wrap:normal");

            if (dt.Rows.Count > 0)
            {
                GridViewSmsComplaints.DataSource = dt;
                GridViewSmsComplaints.DataBind();
                GridViewSmsComplaints.Visible = true;
                //gridViewComplaintsBySubject.Visible = false;
            }
            else
            {
                dt.Rows.Add(dt.NewRow());
                GridViewSmsComplaints.DataSource = dt;
                GridViewSmsComplaints.DataBind();
                int totalcolums = GridViewSmsComplaints.Rows[0].Cells.Count;
                GridViewSmsComplaints.Rows[0].Cells.Clear();
                GridViewSmsComplaints.Rows[0].Cells.Add(new TableCell());
                GridViewSmsComplaints.Rows[0].Cells[0].ColumnSpan = totalcolums;
                GridViewSmsComplaints.Rows[0].Cells[0].Text = "No Data Found for this date combination";
                GridViewSmsComplaints.Visible = true;
                //gridViewComplaintsBySubject.Visible = false;
            }
        }
        catch
        {
            HiddenFieldSetMessage.Value = "SomethingWrong";
            HiddenFieldShowMessage.Value = "True";
        }
    }