TextBox using HTMLEditorExtender does not insert new line when pressing Enter

Question

I am using AjaxToolKit's HTMLEditorExtender control in my website. The markup is as follows:

<asp:TextBox ID="TextBox2" runat="server" 
        Font-Names="'lucida grande',tahoma,verdana,arial,sans-serif" Height="100%" OnTextChanged="TextBox2_TextChanged" 
        style="margin-bottom: 26px; font-size: small;" Width="90%"></asp:TextBox>

<asp:HtmlEditorExtender ID="TextBox2_HtmlEditorExtender" runat="server" 
        Enabled="True" TargetControlID="TextBox2">
    <Toolbar>
        <asp:Undo />
        <asp:Redo />
        <asp:Bold />
        <asp:Italic />
        <asp:Underline />
        <asp:StrikeThrough />
        <asp:Subscript />
        <asp:Superscript />
        <asp:InsertOrderedList />
        <asp:InsertUnorderedList />
        <asp:RemoveFormat />
        <asp:SelectAll />
        <asp:UnSelect />
        <asp:Delete />
        <asp:Cut />
        <asp:Copy />
        <asp:Paste />
        <asp:Indent />
        <asp:Outdent />
        <asp:FontNameSelector />
    </Toolbar>
</asp:HtmlEditorExtender>

Running the application, and pressing Enter while TextBox2 has focus, no new line is inserted; instead, TextBox2 loses focus.

This doesn't happen unless the HTMLEditorExtender is attached to TextBox2.

More Details

I am running the application in local IIS. The website is live but the feature is not launched on the main website yet. I am using ASP.NET WebForms and latest AjaxToolkit version. Also this problem is in every browser including Chrome, IE, Opera, Firefox.

Answer 1

Finally I solved the error myself. The code which I provided was enclosed in a Panel that has a default button. So I removed the DefaultButton property and the code is working fine now. Thank you all for adding your responses.

Answer 2

I believe you need to set the number of rows. Take a look at this example, as I know it works for me:

<ajax:HtmlEditorExtender ID="tbCommentHtmlExtender" runat="server"  
TargetControlID="tbEditor" DisplaySourceTab="false" EnableSanitization="false">  
  <Toolbar>                                        
   <ajax:FontNameSelector />
   <ajax:FontSizeSelector />
   <ajax:Bold />
   <ajax:Italic />
   <ajax:Underline />
   <ajax:StrikeThrough />
   <ajax:JustifyLeft />
   <ajax:JustifyCenter />
   <ajax:JustifyRight />
   <ajax:JustifyFull />
   <ajax:InsertOrderedList />
   <ajax:InsertUnorderedList />
   <ajax:CreateLink />
   <ajax:UnLink />
   <ajax:RemoveFormat />
   <ajax:BackgroundColorSelector />
   <ajax:ForeColorSelector />
  </Toolbar>
</ajax:HtmlEditorExtender>  

<asp:TextBox ID="tbEditor"  runat="server" Width="570px" Height="570px"  Rows="10" TextMode="MultiLine" ></asp:TextBox>

Also, what is

OnTextChanged="TextBox2_TextChanged"

doing? If my above suggestion doesn't work, try removing that. If that works, post the corresponding function.