Break HTML text inside ASP.Net GridView using C#

Hi,

In the table t_contents of database MySql version 8.0.17 I have stored in field/column contents the text that contains HTML code

On the GridView in markup page aspx using ASP.NET C#

I have set for correctly output

<asp:TemplateField HeaderText="Test"
    ItemStyle-HorizontalAlign="Left">
    <ItemTemplate>
        <asp:Label ID="lbtest" runat="server"
            Text='<%# HttpUtility.HtmlDecode(Eval("contents").ToString()) %>'>
        </asp:Label>
    </ItemTemplate>
    <EditItemTemplate>
        <asp:TextBox ID="txtext"
            runat="server"
            TextMode="MultiLine"
            Text='<%# HttpUtility.HtmlDecode(Eval("contents").ToString()) %>'></asp:TextBox>
    </EditItemTemplate>
</asp:TemplateField>

Now I need insert new line (break) on this html text each 20 letters using

    Text='<%# HttpUtility.HtmlDecode(SpliceText(Eval("contents").ToString(),20))%>'


    public static string SpliceText(string text, int lineLength)
    {
        var charCount = 0;
        var lines = text.Split(new string[] { " " }, StringSplitOptions.RemoveEmptyEntries)
                        .GroupBy(w => (charCount += w.Length + 1) / lineLength)
                        .Select(g => string.Join(" ", g));

        return String.Join("<br />", lines.ToArray());
    }

The problem it's inserting the SpliceText the output in gridview contains html code open.

 With the SpliceText function

Without the SpliceText function

How to to resolve this?

Can you help me? Thanks