C＃如何获取动态创建的HTML控件

Question

I generated a HTMLTextArea using string and Response.Write() :

string area = "<textarea id=\"myArea{0}\" cols=\"30\" name=\"S1\" rows=\"5\" runat=\"server\"></textarea>";

Response.Write(String.Format(area,1));

After this, I don't know how to get the object of this myArea1 .

Are there any way I can achieve this goal?

Answer 1

The proper way to add System.Web.UI.HtmlControls. will be,

var newTextArea = new HtmlTextArea()
{
    ID = string.Format("myArea{0}", 1),
    Name = string.Format("S{0}", 1),
    Cols = 30,
    Rows = 5
};
Page.Controls.Add(newTextArea);

Then you can access it like,

var myTextArea = Page.FindControl("myArea1") as HtmlTextArea;

Answer 2

You can try this.

  HtmlTextArea txt = (HtmlTextArea)(Page.FindControl("myArea1"));
  string value = txt.Value;

Refer to this .

Answer 3

如果只对获取用户输入感兴趣，则实际上并不需要访问TextArea对象本身，您应该可以在提交表单时在Request.Form集合中找到它。