动态生成TextBox控件和获取控件输入的值？该怎么处理

动态生成TextBox控件和获取控件输入的值？
点击button动态生成TextBox控件和获取控件输入的值？

[解决办法]
#1的一点都不厚道，这么简单的功能还打广告

丢个button到form上面

C# code

    public partial class Form1 : Form    {        TextBox _mtextbox = null;        public Form1()        {            InitializeComponent();            button1.Text = "点击创建控件";        }        private void button1_Click(object sender, EventArgs e)        {            if (_mtextbox == null)            {                _mtextbox = new TextBox();                this._mtextbox.Location = new System.Drawing.Point(150, 149);                this._mtextbox.Name = "textBox1";                this._mtextbox.Size = new System.Drawing.Size(100, 21);                this._mtextbox.TabIndex = 1;                this.Controls.Add(_mtextbox);                button1.Text = "在输入框中输入信息以后点击";            }            else                MessageBox.Show(this._mtextbox.Text);        }    }
[解决办法]
C# code
 protected void Page_Load(object sender, EventArgs e)    {        if (ViewState["isok"] != null)        {            CreateTextBox();        }    }    protected void Button1_Click(object sender, EventArgs e)    {        CreateTextBox();    }    private void CreateTextBox()    {        TextBox tb = new TextBox();        tb.ID = "TextBox1";        tb.AutoPostBack = true;        tb.TextChanged += new EventHandler(tb_TextChanged);        this.form1.Controls.Add(tb);        ViewState["isok"] = true;    }    void tb_TextChanged(object sender, EventArgs e)    {        Response.Write((sender as TextBox).Text);    }