Asp.net login foreground background source code

Last Update:2013-12-28 Source: Internet

Author: User

Developer on Alibaba Coud: Build your first app with APIs, SDKs, and tutorials on the Alibaba Cloud. Read more ＞

Front-end code:

<Head>
<Title> </title>
<Style type = "text/css">
Body {font: 12px Helvetica, Arial, sans-serif; margin: 100px auto; padding: 0; word-wrap: break-word; word-break: break-all; background-color: #016BA9 ;}
. Login1 {background-image: url (../Images/login_1.jpg); width: 960px; height: 94px; margin: 0 auto ;}
. Login2 {background-image: url (../Images/login_2.jpg); width: 960px; height: 49px; margin: 0 auto ;}
. Login3 {background-image: url (../Images/login_3.jpg); width: 960px; height: 125px; margin: 0 auto ;}
. Login4 {background-image: url (../Images/login_4.jpg); width: 960px; height: 91px; margin: 0 auto ;}
. LoginTXT {border: 1px solid #800000; width: 150px; background-color: #866961; color: # fff; height: 19px ;}
</Style>
<Script type = "text/javascript">
If (top. location! = Self. location)
Top. location = self. location;

Function CheckIn (){
Var names = document. getElementById ("txtU_Name"). value;
Var pass = document. getElementById ("txtU_Pass"). value;
Var check = document. getElementById ("txtU_Check"). value;
If (names = ""){
Alert ("Enter the user name ...");
Document. getElementById ("txtU_Name"). focus ();
Return false;
}
Else if (pass = ""){
Alert ("enter your password ...");
Document. getElementById ("txtU_Pass"). focus ();
Return false;
}
Else if (check = ""){
Alert ("Enter the verification code ...");
Document. getElementById ("txtU_Check"). focus ();
Return false;
}
}
</Script>
</Head>
<Body>
<Form id = "form1" runat = "server" defaultfocus = "txtU_Name" defaultbutton = "BtnLogin">
<Div class = "login1"> </div>
<Div class = "login2"> </div>
<Div class = "login3">
<Table cellpadding = "0" cellspacing = "1" border = "0" style = "margin-left: 320px; width: 300px;">
<Tr>
<Td> User name: </td>
<Td> <asp: textbox ID = "txtU_Name" runat = "server" class = "loginTXT" maxlength = "20"> </asp: textbox> </td>
</Tr>
<Tr>
<Td> User Password: </td>
<Td> <input id = "txtU_Pass" type = "password" runat = "server" class = "loginTXT" maxlength = "6"/> </td>
</Tr>
<Tr>
<Td> Verification Code: </td>
<Td> <asp: textbox ID = "txtU_Check" runat = "server" class = "loginTXT" style = "width: 85px;" maxlength = "5"/> & nbsp; </td>
</Tr>
<Tr>
<Td colspan = "2"> </Tr>
<Tr>
<Td> </td>
<Td>
<Asp: button ID = "BtnLogin" runat = "server" text = "Logon management" OnClientClick = "return CheckIn ()" onclick = "BtnLogin_Click"/>
& Nbsp; <asp: button ID = "BtnHome" runat = "server" text = "back to homepage"
Onclick = "BtnHome_Click"/>
</Td>
</Tr>
</Table>
</Div>
<Div class = "login4"> </div>
</Form>
</Body>
</Html>

Background code:

Protected void BtnLogin_Click (object sender, EventArgs e)
{
String username = txtU_Name.Text;
String pwd = txtU_Pass.Value;
String check = txtU_Check.Text;

If (CheckNull ())
{
If (check. ToString (). ToLower () = Session ["ValidateCode"]. ToString (). ToLower ())
{
String strsql = "select count (1) from Login where UserName = '" + username + "' and UserPwd = '" + pwd + "'";
Object obj = SqlHelper. ExecuteScalar (ConfigurationManager. ConnectionStrings ["conn"]. ToString (), CommandType. Text, strsql );
If (obj! = Null & (int) obj> 0)
{
Response. Write ("<script> alert ('logon successful! ') </Script> ");
Session ["username"] = username;

HttpCookie hc = new HttpCookie ("username", username );
Hc. Expires = DateTime. Now. AddMinutes (1 );
Response. Cookies. Add (hc );

Response. Redirect ("Main. aspx ");
}
Else
{
Response. Write ("<script> alert ('user name or password is incorrect! ') </Script> ");
Response. Write ("<script> window. location. href = 'login. aspx '</script> ");
}
}
Else
{
Response. Write ("<script> alert ('verification code error! ') </Script> ");
Response. Write ("<script> window. location. href = 'login. aspx '</script> ");

}
}

}
Private bool CheckNull ()
{
Return (! (String. IsNullOrEmpty (txtU_Name.Text.Trim ()))&&! (String. IsNullOrEmpty (txtU_Pass.Value.Trim ()))&&! (String. IsNullOrEmpty (txtU_Check.Text.Trim ())))? True: false;
}

Main homepage code: page_Load

Try
{
String username = Session ["username"]. ToString ();
}
Catch
{
Response. Write ("<script> alert ('Log On from the homepage! '); Location. href = 'login. aspx'; </script> ");
}

This article from the "cainiao" blog, please be sure to keep this source http://wolfoo.blog.51cto.com/3126463/1288217

This article is an English version of an article which is originally in the Chinese language on aliyun.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to info-contact@alibabacloud.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

Get Started for Free

Sales Support

1 on 1 presale consultation

Chat Contact Sales
After-Sales Support

24/7 Technical Support 6 Free Tickets per Quarter Faster Response

Open a Ticket
Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.

Learn More

Asp.net login foreground background source code

Contact Us

A Free Trial That Lets You Build Big!

Sales Support

After-Sales Support