1. Why can you call yourself in C #? For example the following code: protected override void Render (System.Web.UI.HtmlTextWriter writer) {if (! Message = String.Empty) this.lblWelcome.Text = _message; if (! IconImageUrl = String.Empty) this.imgIcon.ImageUrl = _Imageurl; base.render (Writer);
For example, Override Protected Void OnNit (Eventargs E) {// // Codegen: This call is required for the ASP.NET Web Form Designer. // InitializeComponent (); base.oninit (e);
2. Why do you have different pages in the .NET environment and in IIS When you add a custom control to the page, you can debug the user control in .NET, you can run in IIS.
3, protected string headerMessage = string.empty; what is the difference between String.empty and the front String? What type is it?
