java - How can I add to the current value in SQLite column? -

-

im trying add on current number in credits column of person rowid of 0. if current value 5 , user selects number 2 in spinner , clicks button, value change 7. value gets updated 2. need add/change code achieve this?

    public void updateuser(int money)      {         string selectquery = "select " + key_credits + " " +                                    database_table + " " + key_rowid + " = " + 0;         cursor c = ourdatabase.rawquery(selectquery, null);         int oldmoney = 0;         if (c.movetofirst())          {                       oldmoney = oldmoney + integer.parseint(c.getstring(4));         }         contentvalues cvupdate = new contentvalues();         cvupdate.put(key_credits, (oldmoney + money));         ourdatabase.update(database_table, cvupdate, null, null);     }

you missed clause in update part

ourdatabase.update(database_table, cvupdate, key_rowid + "=?" ,new string[] { "1" });

i guess updated 2, because without clause update all entries. not updated 7 because, select statement has no results (don't know why, more code useful). check if select selects row:

public void updateuser(int money)  {     string selectquery = "select " + key_credits + " " +                                database_table + " " + key_rowid + " = " + 1;     cursor c = ourdatabase.rawquery(selectquery, null);     int oldmoney = 0;     log.d("com.example.yourapp", c.getcount() + " rows selected");     if (c.movetofirst())      {                                oldmoney = c.getint(c.getcolumnindex(key_credits));     }     contentvalues cvupdate = new contentvalues();     cvupdate.put(key_credits, (oldmoney + money));     ourdatabase.update(database_table, cvupdate, key_rowid + "=?" ,new string[] { "1" }); }

check log how big result is.

i hope helps you.

@edit: documentation of update @edit2: updated solution


Comments

Post a Comment

Popular posts from this blog

windows - Single EXE to Install Python Standalone Executable for Easy Distribution -

-
i used pyinstaller create standalone exe file pyqt project. did not use single file option because exe created single file option takes long open. therefore, pyinstaller created dist folder contains bunch of files including program.exe file. create setup.exe file place contents of dist folder in program directory , create shortcut in start menu , on desktop. want super simple user. maybe setup.exe files when download program cnet. found inno-setup, looks promising. however, not know if there special considerations because program standalone program create python/pyqt program. thanks! have experience task? there program using task not know about? inno-setup or nsis easiest use. tell them files include , put them , create nice installer you. wrote short tutorial on experiences using innosetup might find helpful: http://www.blog.pythonlibrary.org/2008/08/27/packaging-wxpymail-for-distribution/ note tutorial based around wxpython app wrote, concepts same.
Read more

c# - Access objects in UserControl from MainWindow in WPF -

-
i have simple xaml, how can change text property of textblock in usercontrol1 mainwindow ? <window x:class="refactorxaml.mainwindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:refactorxaml="clr-namespace:refactorxaml" title="mainwindow" height="350" width="525"> <grid> <grid.rowdefinitions> <rowdefinition height="100"></rowdefinition> <rowdefinition height="100"></rowdefinition> </grid.rowdefinitions> <grid> <refactorxaml:usercontrol1></refactorxaml:usercontrol1> </grid> <grid grid.row="1"> <button>change text</button> </grid> </grid> </window> <usercon...
Read more

javascript - How to name a jQuery function to make a browser's back button work? -

-
i'm trying write function ajaxyfy web site, works perfect, except function button. that's have now: function loading() { if (typeof history.pushstate !== "undefined") { var historycount = 0; $('.menu-item, .logo').on('click','a',function(e){ e.preventdefault(); $(this).data('clicked', true); if ($(this).is('.logo a')) { var homepage = $(this).attr('href'); function1(homepage); history.pushstate(null, null, homepage); } else if ($(this).is('.projects a')) { var projects = $(this).attr('href'); function2(projects); history.pushstate(null, null, projects); } else { var pages = $(this).attr('href'); function3(pages); history.pushstate(null, null, pages); ...
Read more