The textarea control (used for multiline textbox) doesn't support a maxlength.
However, you can insert a little Javascript on the client to trim the excess
text when the textarea loses the focus. Here's a little example:
Private Sub Page_Load _
(ByVal sender As System.Object, _
ByVal e As System.EventArgs) Handles MyBase.Load
Dim sb As New System.Text.StringBuilder
sb.Append("<script language='javascript'>function ")
sb.Append("checklen(){var str=document.forms[0].TextBox1.value;")
sb.Append("document.forms[0].TextBox1.value=")
sb.Append("str.substring(0,255);}</script>")
Page.RegisterClientScriptBlock("chker", sb.ToString)
TextBox1.Attributes.Add("onblur", "checklen();")
End Sub
<form id="Form1" method="post" runat="server">
<p>
<asp:textbox id="TextBox1" runat="server" textmode="MultiLine"
maxlength="255" width="390px"
height="176px"></asp:textbox></p>
<p>
<asp:button id="Button1" runat="server" text="Button"></asp:button></p>
</form>
Does this help?
Ken
MVP [ASP.NET]
Hi,
I have a Text box and set its multiline property to "TRUE". How can i set
it maxlength property. I need to set its maxlength property to 255. Can
anyone help me out.
Thx,
kalai
