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Ajax + asp.net for User Login

Source: Internet
Author: User
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Ajax + asp.net for User Login

This article mainly introduces Ajax + asp.net to Implement User Login. It is mainly used to practice ajax usage. If you need it, refer to it.

 

 

Using user logon as an example to practice ajax usage

Login.html

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Success <! DOCTYPE html>

<Html xmlns = "http://www.w3.org/1999/xhtml">

<Head>

<Meta http-equiv = "Content-Type" content = "text/html; charset = UTF-8"/>

<Title> </title>

<Script type = "text/javascript">

Var obj = createobj ();

 

Function login (name, pwd)

{

Var urlstr = "http: /localhost: 14248/server. aspx? Username = "+ name +" & password = "+ pwd;

Obj. open ("get", urlstr, true );

Obj. onreadystatechange = dowork;

Obj. send ();

}

 

Function dowork ()

{

If (obj. readyState = 4)

{

If (obj. status = 200)

{

Document. getElementById ("msg"). innerText = obj. responseText;

}

}

}

// Create an object

Function createobj ()

{

Var xmlHttp = null;

Try {

// Non-IE browser

XmlHttp = new XMLHttpRequest ();

}

Catch (e)

{// IE browser

Try {

XmlHttp = new ActiveXObject ("Msxml2.HTTP ");

}

Catch (e)

{

XmlHttp = new ActiveXObject ("Microsoft. XMLHTTP ");

}

}

Return xmlHttp;

}

</Script>

</Head>

<Body>

<Table>

<Tr>

<Td align = "center" colspan = "2"> logon </td>

</Tr>

<Tr>

<Td> User name: </td>

<Td> <input type = "text" id = "username" name = "username"/> </td>

</Tr>

<Tr>

<Td> password: </td>

<Td> <input type = "password" id = "password" name = "password"/> </td>

</Tr>

<Tr>

<Td>

<Input type = "submit" value = "login" onclick = "login (document. getElementById ('username '). value, document. getElementById ('Password '). value) "/>

</Td>

<Td>

<Input type = "reset" value = "clear"/>

</Td>

<Td> <span id = "msg"> </span> </td>

</Tr>

</Table>

</Body>

</Html>

DAL. cs

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Using System;

Using System. Collections. Generic;

Using System. Data;

Using System. Data. SqlClient;

Using System. Linq;

Using System. Web;

 

Namespace AJAXtest

{

Public class DAL

{

Private string connstr = "server = acer-pc; database = mydatabase; user id = sa; password = 123456 ";

Public DataTable selectDB (string SQL)

{

DataTable dt = new DataTable ();

Try

{

SqlConnection conn = new SqlConnection (connstr );

SqlDataAdapter sda = new SqlDataAdapter (SQL, conn );

Sda. Fill (dt );

}

Catch (Exception e)

{}

Return dt;

}

}

}

BLL. cs

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Using System;

Using System. Collections. Generic;

Using System. Data;

Using System. Linq;

Using System. Web;

 

Namespace AJAXtest

{

Public class BLL

{

Public bool login (string username, string password)

{

Try

{

String SQL = "select password from Users where username = '" + username + "'";

DAL sqlSelect = new DAL ();

DataTable dt = sqlSelect. selectDB (SQL );

If (dt. Rows [0] ["password"]. ToString ()! = Password)

Return false;

}

Catch (Exception)

{

}

Return true;

}

}

}

Server. aspx. cs

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Using System;

Using System. Collections. Generic;

Using System. Linq;

Using System. Web;

Using System. Web. UI;

Using System. Web. UI. WebControls;

 

Namespace AJAXtest

{

Public partial class Server: System. Web. UI. Page

{

Protected void Page_Load (object sender, EventArgs e)

{

String username = Request ["username"]. ToString ();

String password = Request ["password"]. ToString ();

BLL B = new BLL ();

If (B. login (username, password ))

{

Response. Write ("Logon successful ");

Response. End ();

}

Else

{

Response. Write ("Logon Failed ");

Response. End ();

}

}

}

}

Server. aspx

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Dependencies <% @ Page Language = "C #" AutoEventWireup = "true" CodeBehind = "Server. aspx. cs" Inherits = "AJAXtest. Server" %>

 

<! DOCTYPE html>

 

<Html xmlns = "http://www.w3.org/1999/xhtml">

<Head runat = "server">

<Meta http-equiv = "Content-Type" content = "text/html; charset = UTF-8"/>

<Title> </title>

</Head>

<Body>

<Form id = "form1" runat = "server">

<Div>

 

</Div>

</Form>

</Body>

</Html>

The above is all the content of this article. I hope you will like it.

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.

Related Keywords:
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