Update all GridView row with jQuery QuickSearch plugin using VB.Net in ASP.Net

I have gridview with checkbox, boundfield and textboxfor input data. Also using quicksearch.js in gridheader. When i select some filtered data rowindex value is not correct and the update gone wrong data.

The form work well before i implemented quick search. I am quite new in js, and now the rowindex is not good (value form txtUP is ok), but the rowindex is not ok.

My update  button is outside gridview. 

<script type="text/javascript" src="Scripts/quicksearch.js"></script>
<script type="text/javascript">
    $(function () {
        $('.search_textbox').each(function (i) {
            $(this).quicksearch("[id*=GridTrx] tr:not(:has(th))", {
                'testQuery': function (query, txt, row) {
                    return $(row).children(":eq(" + i + ")").text().toLowerCase().indexOf(query[0].toLowerCase()) != -1;
                }
            });
        });
    });
</script>

<asp:GridView ID="GridTrx" runat="server" AutoGenerateColumns="False" Width="1050px"
    OnDataBound="OnDataBound" AllowSorting="True" OnSorting="GridTrx_Sorting" ClientIDMode="Static">
    <Columns>
        <asp:TemplateField HeaderText="" ItemStyle-HorizontalAlign="Left">
            <HeaderTemplate>
                <asp:CheckBox ID="chkHeader" runat="server" onclick="checkAll(this);" Visible="false" />
            </HeaderTemplate>
            <HeaderStyle Height="50px" />
            <ItemTemplate>
                <asp:CheckBox ID="chkRow" runat="server" onclick="Check_Click(this)" />
            </ItemTemplate>
            <ItemStyle Width="50px" />
        </asp:TemplateField>
        <asp:BoundField DataField="name" HeaderText="Current UP name" SortExpression="name"
            HtmlEncode="false">
            <ItemStyle Font-Names="Arial" Font-Size="X-Small" Font-Bold="True" />
        </asp:BoundField>
        <asp:TemplateField HeaderText="New UP name" SortExpression="name">
            <ItemTemplate>
                <asp:TextBox ID="txtUP" runat="server" AutoPostBack="false" Text='<%# Bind("name") %>'
                    Enabled="false" Font-Names="Arail" Font-Size="X-Small" Width="500px">
                </asp:TextBox>
            </ItemTemplate>
            <ItemStyle Font-Names="Arial" Font-Size="X-Small" Width="500px" />
        </asp:TemplateField>
        <asp:BoundField DataField="broj" HeaderText="broj" SortExpression="broj">
            <ItemStyle Font-Names="Arial" Font-Size="X-Small" Font-Bold="True" />
        </asp:BoundField>
    </Columns>
    <RowStyle BackColor="#F7F6F3" ForeColor="#333333" />
    <FooterStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
    <PagerStyle CssClass="pager-row" HorizontalAlign="Center" BackColor="#284775" ForeColor="White" />
    <SelectedRowStyle BackColor="#E2DED6" Font-Bold="True" ForeColor="#333333" />
    <HeaderStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
    <EditRowStyle BackColor="#999999" />
    <AlternatingRowStyle BackColor="White" ForeColor="#284775" />
</asp:GridView>
</div>
<div>
    <input id="Hidden1" type="hidden" />
</div>
</div>
<asp:SqlDataSource ID="sqlDatum" runat="server" ConnectionString="<%$ ConnectionStrings:conMA %>"
    SelectCommand="select distinct convert(char(10),datumImport,1) as datumImport FROM [M_A_TI_PN].[dbo].[Table_import] a with(nolock) order by 1">
</asp:SqlDataSource>

Protected Sub BtnUpdate_Click(sender As Object, e As EventArgs) Handles BtnUpdate.Click
    Dim userUpdate As String = Session("user")
    Dim DateUpdate As Date = Now.Date
    Dim Name_old As String = String.Empty
    Dim Name_new As String = String.Empty
 
    If DdllDatum.SelectedValue = "%" Then
        ClientScript.RegisterClientScriptBlock(Me.GetType(), "ClientScript", "alert ('choose date!')", True)
        Exit Sub
    End If
 
    Dim DatumImport As Date = CDate(DdllDatum.SelectedValue.ToString)
 
    Dim dt As New DataTable()
    dt.Columns.AddRange(New DataColumn(4) {New DataColumn("Name_old", GetType(String)),
                                        New DataColumn("Name_new", GetType(String)),
                                            New DataColumn("userUpdate", GetType(String)),
                                        New DataColumn("DateUpdate", GetType(Date)),
                                        New DataColumn("DatumImport", GetType(Date))})
 
 
    For i As Integer = 1 To GridTrx.Rows.Count - 1
        Dim cb As CheckBox = DirectCast(GridTrx.Rows(i).Cells(0).FindControl("chkRow"), CheckBox)
 
        If cb.Checked Then
            Dim novi As TextBox = DirectCast(GridTrx.Rows(i).Cells(0).FindControl("txtUP"), TextBox)
 
            Name_new = novi.Text.Trim
            Name_old = GridTrx.Rows(i).Cells(1).Text.ToString
            dt.Rows.Add(Name_old, Name_new, userUpdate, DateUpdate, DatumImport)
        End If
    Next
 
    If dt.Rows.Count > 0 Then
        UpdateUP(dt)
        BindUP()
 
        ClientScript.RegisterClientScriptBlock(Me.GetType(), "ClientScript", "alert ('Uspjesan update')", True)
    Else
        ClientScript.RegisterClientScriptBlock(Me.GetType(), "ClientScript", "alert ('Nije nista oznaceno za update')", True)
    End If 
End Sub