Question

将值更新到数据库时，不是每次更新1行（这是我们想要的），而是更新整个数据库列。这是我的代码：

Java代码：

  private Dialog alertDialog() {          final AlertDialog.Builder
alertDialog = new AlertDialog.Builder（NotificationActivity.this）;
              // Setting Dialog Title
              alertDialog.setTitle("Confirmation...");

              // Setting Dialog Message
              alertDialog.setMessage("Do you want to accept this job?");

              // Setting Icon to Dialog
              alertDialog.setIcon(R.drawable.ic_dialog_alert);

              // Setting Positive "Yes" Button
              alertDialog.setPositiveButton("YES", new DialogInterface.OnClickListener() {
                          public void onClick(DialogInterface dialog,int which) {
                              // Write your code here to execute after dialog
                              Toast.makeText(getApplicationContext(), "Accept", Toast.LENGTH_SHORT).show();
                              // Return Result from alertdialog to database
                              result = "accepted";
                               System.out.println("The result is "+ result);
                               new UpdateActivity().execute();
                          }
                      });
              // Setting Negative "NO" Button
              alertDialog.setNegativeButton("NO", new DialogInterface.OnClickListener() {
                          public void onClick(DialogInterface dialog, int which) {
                              // Write your code here to execute after dialog
                              Toast.makeText(getApplicationContext(), "Reject", Toast.LENGTH_SHORT).show();
                              dialog.cancel();
                              // Return Result from alertdialog to database
                              result = "rejected";
                              System.out.println("The result is "+ result);
                               new UpdateActivity().execute();
                          }
                      });
              return alertDialog.show();      }
/ ** *后台异步任务更新数据库* * /类   UpdateActivity扩展了AsyncTask {

/ ** *开始后台线程之前显示进度对话框* * /     @Override protected void onPreExecute（）{super.onPreExecute（）;         pDialog = new ProgressDialog（NotificationActivity.this）;         pDialog.setMessage（“发送...”）;         pDialog.setIndeterminate（假）; pDialog.setCancelable（真）;         pDialog.show（）; }

/ ** *保存产品* * /受保护的字符串   doInBackground（String ... args）{                 的System.out.println（ “发送...”）;
  // getting updated data from dialog         String confirmation =
result.toString（）; System.out.println（“结果为字符串...”+确认）;
  // Building Parameters              List<NameValuePair> params = new
的ArrayList（）; params.add（new BasicNameValuePair（TAG_ID， UID））; params.add（new BasicNameValuePair（TAG_RESULT，confirmation））; //获取JSON对象 //请注意，create product url接受POST方法 JSONObject json = jsonParser.makeHttpRequest（UPDATE_URL， “POST”，params）; System.out.println（“Json解析...”）; //检查log cat以回复 Log.d（“Create Response”，json.toString（））;
          // check for success tag
          try {
              System.out.println("Checking...");
              int success = json.getInt(TAG_SUCCESS);

              if (success == 1) {
                  // successfully created product
                  Intent i = new Intent(getApplicationContext(), JobsAcceptedActivity.class);
                  startActivity(i);
                  //Toast.makeText(getApplicationContext(), "Update successfully...", Toast.LENGTH_SHORT).show();
                  System.out.println("Successfully updated...");
                  // closing this screen
                  finish();
              } else {
                  // failed to create product
                  //Toast.makeText(getApplicationContext(), "Update unsucessfully...", Toast.LENGTH_SHORT).show();
                  System.out.println("Update unsuccessfully...");
              }
          } catch (JSONException e) {
              e.printStackTrace();
          }
          System.out.println("Done!");

          return null;            }

      /**
       * After completing background task Dismiss the progress dialog
       * **/          protected void onPostExecute(String file_url) {
          // dismiss the dialog once done
          pDialog.dismiss();          }

  }   }

PHP代码：

$ response = array（）; //检查必填字段（isset（$ _ POST ['UID']）＆amp;＆amp; isset（$ _ POST ['accept']））{

$UID = $_POST['UID'];
$accept = $_POST['accept'];

// include db connect class
require_once __DIR__ . '/db_connect.php';

// connecting to db
$db = new DB_CONNECT();

// mysql update row with matched pid
$result = mysql_query("UPDATE notification SET accept = '$accept' WHERE UID = $UID");

// check if column inserted or not
if ($result) {
    // successfully updated
    $response["success"] = 1;
    $response["message"] = "Notification successfully updated.";

    // echoing JSON response
    echo json_encode($response);
} else {

} } else {
// required field is missing
$response["success"] = 0;
$response["message"] = "Required field(s) is missing";

// echoing JSON response
echo json_encode($response);

Answer 1

问：将值更新到数据库时，不是每次更新1行（这是我们想要的），而是更新整个数据库列。

答：听起来你可能想要更新更严格的“where”条款：）

Answer 2

这是你的==＆gt; $ result = mysql_query（“UPDATE notification SET accept ='$ accept'WHERE UID = $ UID”）;

我的Suggession ==＆gt; $ result = mysql_query（“UPDATE notification SET accept ='$ accept'WHERE UID ='$ UID'”）;或
$ queryString =“UPDATE notification SET accept =”。$ accept。“WHERE UID =”。$ UID;
$ result = mysql_query（$ queryString）;

更新mySQL数据库

2 个答案: