How to pull PostBack data into a dynamically added UserControl (.NET)?

问题

I have a Panel on my Page:

<asp:Panel ID="pnlTest" runat="server" />

Then I dynamically add a TextBox to it on Page_Load:

    TextBox simpleTextBox = new TextBox();
    pnlTest.Controls.Add(simpleTextBox);
    simpleTextBox.ID = "SimpleTextBox-1";

Is there a way to pull in the information typed in this TextBox without pulling it directly from Request.Form? I thought I could do something like this after I added it again:

lblPresentResults.Text = myTextBox.Text;

I know this example seems contrived, but I figured I'd try to eliminate all the other variables in my specific application, especially to ask a question here.

回答1:

You need to add the textbox before viewstate loads, such as in Page_Init, and you should be able to do this.

回答2:

Just create the text box on Init or PreInit rather than Load, so that it exists in the page before ViewState is restored. Then ASP.Net will update it for you automatically.

来源：https://stackoverflow.com/questions/722570/how-to-pull-postback-data-into-a-dynamically-added-usercontrol-net