dynamic-controls

I am trying to dynamically create controls and give them properties during run time. I have put my code inside the Page_Init event, when I run my website I can see my controls but when I click on the submit button an error occurrs saying "Object reference not set to an instance of an object". Here is the code I have used: //Creates instances of the Control Label FeedbackLabel = new Label(); TextBox InputTextBox = new TextBox(); Button SubmitButton = new Button(); // Assign the control properties FeedbackLabel.ID = "FeedbackLabel"; FeedbackLabel.Text = "Please type your name: "; SubmitButton.ID

I have dynamically generated controls on the panels of windows form and i have also generated a button for removing the controls, all in rows. int c = 0; private void button1_Click(object sender, EventArgs e) { int v; v = c++; panel1.VerticalScroll.Value = VerticalScroll.Minimum; ComboBox combo = new ComboBox(); combo.Name = "combobox" + v ; combo.Location = new Point(30, 5 + (30 * v)); ComboBox combo2 = new ComboBox(); combo2.Name = "combobox2" + v ; combo2.Location = new Point(170, 5 + (30 * v)); TextBox txt = new TextBox(); txt.Name = "txtbx" + v; txt.Location = new Point(300, 5 + (30 * v))

I want to create control that will allow user to design his own website structure. I imagined that inside UpdatePanel is control(s) with TextBox ( for page name) and Button 'add below'. It would looks like: | "Questions" | | [ add below ] | | "Tags" | | [ add below ] | | "Badges" | | [ add below ] | now when user click on button in "Tags" element there should appear new one, between "Tags" and "Badges", with editable name, so user can name it "Users" for example. It should be done without full postback ( to avoid page blinks). Now is my problem: I cannot load those controls (at last not all of

I'm trying to create a web page that will display an appropriate user control based on the selected value of a drop down list. Basically the page layout is this: Drop Down Selection < User Control created based on drop down selection > I have it half working... the controls are changing when the selection changes. In OnInit(), I dynamically create the last selected control (whose value gets saved in session state because ViewState isn't available at OnInit). When the drop down selection change occurs, I remove the old user control, and add a new one. The problem is: with the new control being