第2个回答 2013-04-26
AutoPostBack="True"给文本框加上自动提交
protected void TextBox1_TextChanged(object sender, EventArgs e)
{
string aa = TextBox1.Text;
int count = aa.Length;
if (count > 5)
{
Response.Write(aa.Substring(0, 5).ToString());
}
else
{
Response.Write(aa);
}
}