从sql server接收数据时出错

我在我的应用程序的一个类中工作正常，下面的代码。以下代码段从远程服务器收到一个字符串“Okay”。从sql server接收数据时出错

try { 
        List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(2); 

        nameValuePairs.add(new BasicNameValuePair("userid", et1.getText().toString())); 
        nameValuePairs.add(new BasicNameValuePair("pass", et2.getText().toString()));      
        httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs)); 
        client.execute(httppost); 
        HttpResponse response = client.execute(httppost); 
        HttpEntity respEntity = response.getEntity(); 

        if (respEntity != null) { 
         // EntityUtils to get the response content 
         content = EntityUtils.toString(respEntity); 

        Log.d("valueeeeeeeeeeee", content); 
        }

的PHP代码是在以下几点：

<?php 

$host = "localhost"; 
$user = "admin"; 
$pass = "123"; 
$connection = mysql_connect($host,$user,$pass) or die (mysql_errno().": ".mysql_error()."<BR>"); 

$userid = mysql_real_escape_string($_POST['userid']); 
    $pass = mysql_real_escape_string($_POST['pass']); 

$db_select=mysql_select_db("mydb"); 
if(!$db_select){ 
    die(mysql_error()); 
    echo "error"; 
} 

    $query = "select count(1) as count_users from wp_users where user_login = '".$userid."' and user_pass='".$pass."'"; 

    $result = mysql_query($query); 
    $row = mysql_fetch_assoc($result); 

    if($row['count_users']>0) 
    { 
     echo "Okay"; 
    } 
    else 
    { 
     echo "Not found"; 
    } 

if($medo=mysql_query($query)){ 
    header("localhost/filename"); 
    exit; 
}else{ 
    echo"<p> Error</p>"; 
    die(mysql_error()); 
}

而当我试图在PHP运行下面的代码它给我同样采用Android代码中的错误。

<?php 

$host = "localhost"; 
$user = "admin"; 
$pass = "123"; 
$connection = mysql_connect($host,$user,$pass) or die (mysql_errno().": ".mysql_error()."<BR>"); 

$userid = mysql_real_escape_string($_POST['userid']); 
    $pass = mysql_real_escape_string($_POST['pass']); 

$db_select=mysql_select_db("mydb"); 
if(!$db_select){ 
    die(mysql_error()); 
    echo "error"; 
} 

    $query= "SELECT * FROM wp_users"; 
    $result = mysql_query($query); 
    $num_rows = mysql_num_rows($result); 

    if("$num_rows" > 0) 
    { 
     echo "$num_rows"; 
    } 
    else 
    { 
     echo "Not found"; 
    } 


    if($medo=mysql_query($query)){ 
    header("localhost/filename"); 
    exit; 
}else{ 
    echo"<p> Error</p>"; 
    die(mysql_error()); 
}

是否有不同的方式接收Android行末尾的行或列中的行数或数据？

来源

2013-05-14 Mohammad Sohaib

首先改变的

if("$num_rows" > 0) 
{ 
    echo "$num_rows"; 
}

到

if ($num_rows > 0) 
{ 
    echo $num_rows; 
}

其次，如果你只是想获得的行数使用查询

$query= "SELECT COUNT(*) FROM wp_users";

来源

2013-05-14 03:28:41 peterm

它仍然给了我“NumberFormatException异常：无效的诠释“error – 2013-05-14 03:32:01

$ query =”SELECT COUNT（*）FROM wp_users“; <------并没有真正的帮助，因为它给了我不正确的行数。 – 2013-05-14 03:36:37

@MohammadSohaib您的查询是'$ query =“SELECT * FROM wp_users”;'因此'SELECT COUNT（*）FROM wp_users'给出了您在问题中提出的问题 - 结果集中的行数。要么改变你的查询，要么清楚地解释你试图得到的数字。 – peterm 2013-05-14 03:40:55

从sql server接收数据时出错

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