How to chage the properties for controls inside a template field?
<p>I have a templatefield having a textbox and filteredtextboxextender inside the templatefield. I need to change the ValidChars property for filteredtextboxextender from "123" to "abc" in c# codebehind. The templatefield is there inside the GridView.
I used the following code in aspx page.</p>

<pre><code>&lt;asp:GridView ID="grdEducation" runat="server" AllowSorting="True" AutoGenerateColumns="False"
                        AllowPaging="false" CellPadding="4" GridLines="Vertical" OnRowDeleting="grdEducation_RowDeleting"
                        OnRowDataBound="grdEducation_RowDataBound" OnRowUpdating="grdEducation_RowUpdating" ShowFooter="false" ShowHeader="true"&gt;
                        &lt;HeaderStyle CssClass="grid-header-style" /&gt;
                        &lt;Columns&gt;
                        &lt;asp:TemplateField HeaderStyle-CssClass="grid-label-small" &gt;`   

    &lt;ItemTemplate&gt;
                                    &lt;table&gt;
                                        &lt;tr&gt;
                                            &lt;td width='90%'&gt;
                                                &lt;table&gt;
                                                &lt;td width='60%'&gt;
                                                        &lt;asp:TextBox ID="textbox1" Width="100px" runat="server"
                                                            ToolTip="Provide text" MaxLength="11"&gt;&lt;/asp:TextBox&gt;
                                                        &lt;ajaxtoolkit:FilteredTextBoxExtender ID="filter" runat="server" TargetControlID="textbox1"
                                                            ValidChars="123" /&gt;

                                                    &lt;/td&gt;
                                                &lt;/table&gt;
    &lt;/td&gt;
                                        &lt;/tr&gt;
                                    &lt;/table&gt;
                                &lt;/ItemTemplate&gt;
                        &lt;/asp:TemplateField&gt;
                        &lt;/Columns&gt;
&lt;/asp:GridView&gt;
</code></pre>

<p>Is there any possibility is there for change filteredtextboxextender property like that like that? </p>

<p>Thank you..</p>
