Limit A String If It's Larger Than Desired?

I currently have a string that I want to limit to 200 characters.

I don't know how to format it so if it's less, it wont change, but if its more, it will trim it.

This is in a ListView Control, NOT a Repeater.

<ItemTemplate>
<div class="portfolio_title">
<div class="custom_title">
<%# DataBinder.Eval(Container.DataItem, "Title")%></div>
</div>
<asp:Literal ID="LiteralArticle" runat="server"></asp:Literal>
<%# DataBinder.Eval(Container.DataItem, "Article")%><br />
<a href="NewsFull.aspx?id=<%# DataBinder.Eval(Container.DataItem, "id")%>">Read Full Article...</a>
<div class="page_line">
</div>
</ItemTemplate>