private void button1_Click(object sender, EventArgs e)
{
string text = textBox1.Text;
Uri uri = new Uri("http://"+textBox1.Text);
webBrowser1.Url = uri;
this.WindowState = FormWindowState.Maximized; //窗体最大化
}
原文：http://www.cnblogs.com/-slient/p/5116640.html