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<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
    <script type = "text/javascript">
        function setAutoComplete() {
            var textBoxes = document.getElementsByClassName("AutoCompleteTextBox");
            for (var i = 0; i < textBoxes.length; i++) {
                addAutoComplete(textBoxes[i].id);
            }
        }
        function addAutoComplete(hfUserId) {
            $("#" + hfUserId).autocomplete({
                source: function (request, response) {
                    $.ajax({
                        url: '<%=ResolveUrl("~/Service.asmx/GetUserNames") %>',
                data: "{ 'prefix': '" + request.term + "'}",
                dataType: "json",
                type: "POST",
                contentType: "application/json; charset=utf-8",
                success: function (data) {
                    response($.map(data.d, function (item) {
                        return {
                            label: item.split('-')[0],
                            val: item.split('-')[1]
                        }
                    }))
                },
                error: function (response) {
                    alert(response.responseText);
                },
                failure: function (response) {
                    alert(response.responseText);
                }
            });
        },
        select: function (e, i) {
            $("#<%=hfUserId.ClientID %>").val(i.item.val);
        },
        minLength: 1
    });
        };
        {
            $(document).ready(function () { setAutoComplete(); });
        }

        </script>
</head>
<body>
    <form id="form1" runat="server">
        <div>
            <asp:TextBox ID="hfUserId" runat="server"></asp:TextBox>
            <asp:GridView ID="GridView1" runat="server"
                AllowPaging="True"
                DataSourceID="SqlDataSource1"
                AutoGenerateColumns="False">
                <Columns>
                    <asp:TemplateField ItemStyle-Width="150px" HeaderText="Challan No">
                        <ItemTemplate>
                            <asp:TextBox ID="txt_UID" runat="server" Text='<%# Eval("ChallanNo")%>'
                                CssClass="AutoCompleteTextBox" Width="130px" BackColor="LightGoldenrodYellow"></asp:TextBox>
                        </ItemTemplate>
                        <ItemStyle Width="150px" />
                    </asp:TemplateField>
                    </Columns>
                </asp:GridView>
            <asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Button" />
        </div>

        <asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:AmitPandeyConnectionString %>" SelectCommand="SELECT [ChallanNo] FROM [CreateDocket]"></asp:SqlDataSource>

    </form>
    <script type = "text/javascript">
     $(document).ready(function () {
            $.each($(".AutoCompleteTextBox"), function (i, textBox) {
                textBox.autocomplete(txt_UID);
            })
     });
        </script>
</body>
</html>

What I want to do is put the value of the textbox(hfUserId) into the gridview textbox in all the rows the other columns in the gridview decide the no of rows
Posted

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