Admin Login Design (7th section) _ Practical Tips

This article implementation of the administrator login effect, when the user name and password is correct, pop-up login success prompts, or pop-up user name or password error prompts.
Today there are three major learning tasks:
Learning Task One understanding the definition of namespaces

Defined
Namespace Space Name
{
Class
}
Reference
Using Space name

Learning Task Two realizes the design of administrator landing interface
the interface layout is as shown in the figure:

Tip: When inserting a table, you should pay attention to the table size, layout, border, background settings, ready in advance, you can save the next work; the 2nd is to distinguish between image and ImageButton.

Learning Task three realization of login interface verification
Step 1: Use a Third-party control validation code control, download the. dll file to add to the Toolbox.
Step 2: In Visual Studio 2008, in the Solution Explorer panel, right-click the site and choose Add ASP.net folder to the bin command from the pop-up shortcut menu. In the pop-up dialog box, right-click the Bin folder, select the Add Reference command from the pop-up shortcut menu, and in the Add Reference dialog box, select the Browse tab, locate the WebValidates.dll file, and add it to the Bin folder.
Step 3: Drag and drop the control to the page.
Step 4: Write code to load the build verification code for the first time. The code is as follows:

public partial class _default:system.web.ui.page 
{
  protected void Page_Load (object sender, EventArgs e)
  { C7/>if (! IsPostBack)
    {
      sncode.create ();
    }
  }

Step 5: Double-click the Login button to add the following code to the Adminlogin.aspx.cs code page:

Public partial class Admin_adminlogin:System.Web.UI.Page {protected void Page_Load (object sender, EventArgs e) { if (!
    IsPostBack) {sncode.create (); } protected void Imagebutton6_click (object sender, ImageClickEventArgs e) {if SNCODE.CHECKSN (textbox3.text.t
      Rim ()) {String username = TextBox1.Text;
      String userpwd = TextBox2.Text;
      Users user1 = null;
      User1 = new users (); User1.
      Admin = Username; User1.
      PWD = userpwd;
      DataSet DS1 = new Userschuli (). Adminlogin (user1); DataTable dt = DS1.
      Tables[0]; if (dt. Rows.Count > 0) {Response.Write ("<script>alert) (' username and password correct! ');
      </script> "); else {Response.Write <script>alert (' username or password incorrect! ');
   </script> "); } else {Response.Write (' <script>alert (' Authentication code Error! ');
    </script> "); } protected void Imagebutton5_click (object sender, ImageClickEventArgs e) {Textbox1.text = "";
    TextBox2.Text = "";
  TextBox3.Text = ""; }
}

Step 6: Run the debugging code, when the user name and password is correct and the verification code is correct, pop-up login success prompt box, or pop-up username or password error box.

Run Effect chart:

Summarize
Through the study of this section, understand the meaning and role of namespaces, use the table layout to implement the administrator login interface design and the use of Third-party control validation Code control to implement the login interface verification.

Hope that the above content can be helpful to everyone's study.