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  • Is File good for Interprocess communication

    - by Karthik
    Hi, I have an EXE and DLL running in different process. From DLL I have to send large of amount of data to EXE, which would vary from 50 chars to 2000 chars and more(The data is recordid of records saved in DB). I thought about two options to do that: 1. Using SendMessage- In which data's will be sent in batch. 2. Use an Intermediate file to transfer data. Can anyone list out the pros and cons of methods. I have developed my components using C#.NET Thanks you folks.

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  • When not to use a Drupal node?

    - by stotastic
    I've recently created a very simple CRUD table where the user stores some data. For the data, I created a custom node. The functionality works great for creating, editing, and deleting data in the CRUD table using the basic node functionality (I'm actually amazed how fast and easy it was to program the basic functionality with proper access controls using only a tiny bit of code).... Since the data isn't meant to be treated the same way as 'content' such as a blog post (no title, no body, no commments, no revisions, shouldn't show up on ?q=node page, no previews, no teasers, etc)... I find that I'm spending most of my time 'turning off' and modifying the stuff that drupal does automatically for nodes. I know its a matter of taste, but where should one draw the line on what should be treated as a node and what shouldn't? In other words, would it be better to program this stuff from scratch without using nodes?

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  • paypal custom confirmation page

    - by krike
    I have a deposit page where people can deposit money on their accounts, but I would like to extend this with other payment methods and also I don't want to have certain information in the form visible to people (those who now how to manipulate form data using firebug). So I want to submit the form to a confirmation page where the data is processed and where new data is added like the paypal e-mail and the IPN link that needs to be send to, and only then redirected to paypal. is there php code I can use to submit the form immediatly once the data is processed? or should this be done in the meta tag or something like that?

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  • Most efficient way to update a MySQL Database on a Linux host with that of an ASP.Net Form on Window

    - by NJTechGuy
    My kind webhost (1and1) royally asked me to go elsewhere to do something like this. I have 2 sites. One of them was developed by a .Net programmer. Now I am contracted to implement a PHP site and fetch data from the .Net site. There is an ASP.Net form that a customer fills and when they hit submit, the data gets stored in SQL Server DB. How do I also store the same data in MySQL parallelly? I cannot directly use some database connectors with ASP.Net since MySQL connectivity is not supported on 1and1 Windows hosting (biz account, no less!). What I thought of is to publish an RSS feed of entries in ASP.Net site and routinely scrape that data into MySQL on Linux host. It is an overkill, I know. Not efficient. I thought I would pick the best brains on SOF to get a different, efficient opinion. Thanks in advance guys...

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  • How to join results from two different sets in LINQ?

    - by Inez
    Hi, I get some data about customers in my database with this method: public List<KlientViewModel> GetListOfKlientViewModel() { List<KlientViewModel> list = _klientRepository.List().Select(k => new KlientViewModel { Id = k.Id, Imie = k.Imie, Nazwisko = k.Nazwisko, Nazwa = k.Nazwa, SposobPlatnosci = k.SposobPlatnosci, }).ToList(); return list; } but also I have another method which counts value for extra field in KlientViewModel - field called 'Naleznosci'. I have another method which counts value for this field based on customers ids, it looks like this: public Dictionary<int, decimal> GetNaleznosc(List<int> klientIds) { return klientIds.ToDictionary(klientId => klientId, klientId => (from z in _zdarzenieRepository.List() from c in z.Klient.Cennik where z.TypZdarzenia == (int) TypyZdarzen.Sprzedaz && z.IdTowar == c.IdTowar && z.Sprzedaz.Data >= c.Od && (z.Sprzedaz.Data < c.Do || c.Do == null) && z.Klient.Id == klientId select z.Ilosc*(z.Kwota > 0 ? z.Kwota : c.Cena)).Sum() ?? 0); } So what I want to do is to join data from method GetNaleznosc with data generated in method GetListOfKlientViewModel. I call GetNaleznosc like this: GetNaleznosc(list.Select(k => k.Id).ToList()) but don't know what to do next.

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  • Drupal module permissions

    - by Trevor Newhook
    When I run the code with an admin user, the module returns what it should. However, when I run it with a normal user, I get a 403 error. The module returns data from an AJAX call. I've already tried adding a 'access callback' = 'user_access'); line to the exoticlang_chat_logger_menu() function. I'd appreciate any pointers you might have. Thanks for the help The AJAX call: jQuery.ajax({ type: 'POST', url: '/chatlog', success: exoticlangAjaxCompleted, data:'messageLog=' + privateMessageLogJson, dataType: 'json' }); The module code: function exoticlang_chat_logger_init(){ drupal_add_js('misc/jquery.form.js'); drupal_add_library('system', 'drupal.ajax'); } function exoticlang_chat_logger_permission() { return array( 'Save chat data' => array( 'title' => t('Save ExoticLang Chat Data'), 'description' => t('Send private message on chat close') ), ); } /** * Implementation of hook_menu(). */ function exoticlang_chat_logger_menu() { $items = array(); $items['chatlog'] = array( 'type' => MENU_CALLBACK, 'page callback' => 'exoticlang_chat_log_ajax', 'access arguments' => 'Save chat data'); //'access callback' => 'user_access'); return $items; } function exoticlang_chat_logger_ajax(){ $messageLog=stripslashes($_POST['messageLog']); $chatLog= 'Drupal has processed this. Message log is: '.$messageLog; $chatLog=str_replace('":"{[{','":[{',$chatLog); $chatLog=str_replace(',,',',',$chatLog); $chatLog=str_replace('"}"','"}',$chatLog); $chatLog=str_replace('"}]}"','"}]',$chatLog); echo json_encode(array('messageLog' => $chatLog)); // echo $chatLog; echo print_r(privatemsg_new_thread(array(user_load(1)), 'The subject', 'The body text')); drupal_exit(); }

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  • Hi, how to verify if file exists on windows bat file?

    - by CuSS
    Hi, i have to create a bat file that does this: 1 - If "C:\myprogram\sync\data.handler" exists, exit; 2 - If "C:\myprogram\html\data.sql" doesn't exists, exit; 3 - In "C:\myprogram\sync\" delete all files and folders except ('test','test3' and 'test2') 4 - Copy "C:\myprogram\html\data.sql" to "C:\myprogram\sync\" 5 - Call other bat file w/ option "sync.bat myprogram.ini". If it was in bash enviroment it was easy for me, but i don't know how to test if a file or folder exists and if it is a file or folder :/ Thanks

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  • LINQ and paging with a DataTable - can't get Skip working?

    - by Kit Menke
    Ok so this might be a dumb question, but I can't seem to figure it out. I thought I'd try out LINQ against a DataTable. I got my query working and now I'm trying to implement some simple paging. DataTable dataTable = null; dataTable = GetAllDataTables(); var query = from r in dataTable.AsEnumerable() orderby r.Field<string>(Constants.fileName) select r; query.Skip(WPP_PAGE_SIZE * pageIndex).Take(WPP_PAGE_SIZE); My problem is that I get an error at query.Skip(...). Error 1 'System.Data.OrderedEnumerableRowCollection' does not contain a definition for 'Skip' and no extension method 'Skip' accepting a first argument of type 'System.Data.OrderedEnumerableRowCollection' could be found (are you missing a using directive or an assembly reference?) References I have: Microsoft.SharePoint System System.Core System.Data System.Data.DataSetExtensions System.Web System.Xml What am I missing?

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  • in django admin, can we have a multiple select based on choices

    - by Rasiel
    http://docs.djangoproject.com/en/dev/ref/models/fields/#choices i've read through the documentation and this implies using a database table for dynamic data, however it states choices is meant for static data that doesn't change much, if ever. so what if i want to use choices, but have it select multiple because the data i'm using is quite static, e.g days of the week. is there anyway to achieve this without a database table?

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  • Cannot read app.config, why???

    - by user46503
    Hello, I'm trying to get data from app.config and I always get zero. The App.config is here: <?xml version="1.0" encoding="utf-8"?> <configuration> <connectionStrings> <add name="ExplorerContext" connectionString="metadata=res://*/ExplorerData.csdl|res://*/ExplorerData.ssdl|res://*/ExplorerData.msl;provider=System.Data.SqlClient;provider connection string=&quot;Data Source=MYT\SQLEXPRESS;Initial Catalog=Explorer;Integrated Security=True;MultipleActiveResultSets=True&quot;" providerName="System.Data.EntityClient" /> </connectionStrings> </configuration> Could someone explain what is wrong, why I cannot get the values, System.Configuration.ConfigurationManager.AppSettings.Count is always 0 Thanks

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  • How to use R's ellipsis feature when writing your own function?

    - by Ryan Thompson
    The R language has a nifty feature for defining functions that can take a variable number of arguments. For example, the function data.frame takes any number of arguments, and each argument becomes the data for a column in the resulting data table. Example usage: > data.frame(letters=c("a", "b", "c"), numbers=c(1,2,3), notes=c("do", "re", "mi")) letters numbers notes 1 a 1 do 2 b 2 re 3 c 3 mi The function's signature includes an ellipsis, like this: function (..., row.names = NULL, check.rows = FALSE, check.names = TRUE, stringsAsFactors = default.stringsAsFactors()) { [FUNCTION DEFINITION HERE] } I would like to write a function that does something similar, taking multiple values and consolidating them into a single return value (as well as doing some other processing). In order to do this, I need to figure out how to "unpack" the ... from the function's arguments within the function. I don't know how to do this. The relevant line in the function definition of data.frame is object <- as.list(substitute(list(...)))[-1L], which I can't make any sense of. So how can I convert the ellipsis from the function's signature into, for example, a list? To be more specific, how can I write get_list_from_ellipsis in the code below? my_ellipsis_function(...) { input_list <- get.list.from.ellipsis(...) output_list <- lapply(X=input_list, FUN=do_something_interesting) return(output_list) } my_ellipsis_function(a=1:10,b=11:20,c=21:30)

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  • IE7 not digesting JSON: "parse error"

    - by Kenny Leu
    While trying to GET a JSON, my callback function is NOT firing. $.ajax({ type:"GET", dataType:'json', url: myLocalURL, data: myData, success: function(returned_data){alert('success');} }); The strangest part of this is that my JSON(s) validates on JSONlint this ONLY fails on IE7...it works in Safari, Chrome, and all versions of Firefox. If I use 'error', then it reports "parseError"...even though it validates! Is there anything that I'm missing? Does IE7 not process certain characters, data structures (my data doesn't have anything non-alphanumeric, but it DOES have nested JSONs)? I have used tons of other AJAX calls that all work (even in IE7), but with the exception of THIS call. An example data return here is: {"question":{ "question_id":"19", "question_text":"testing", "other_crap":"none" }, "timestamp":{ "response":"answer", "response_text":"the text here" } } I am completely at a loss. Hopefully someone has some insight into what's going on...thank you!

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  • mem-leak freeing g_strdup

    - by Mike
    I'm trying to free g_strdup but I'm not sure what I'm doing wrong. Using valgrind --tool=memcheck --leak-check=yes ./a.out I keep getting: ==4506== 40 bytes in 10 blocks are definitely lost in loss record 2 of 9 ==4506== at 0x4024C1C: malloc (vg_replace_malloc.c:195) ==4506== by 0x40782E3: g_malloc (in /lib/libglib-2.0.so.0.2200.3) ==4506== by 0x4090CA8: g_strdup (in /lib/libglib-2.0.so.0.2200.3) ==4506== by 0x8048722: add_inv (dup.c:26) ==4506== by 0x80487E6: main (dup.c:47) ==4506== 504 bytes in 1 blocks are possibly lost in loss record 4 of 9 ==4506== at 0x4023E2E: memalign (vg_replace_malloc.c:532) ==4506== by 0x4023E8B: posix_memalign (vg_replace_malloc.c:660) ==4506== by 0x408D61D: ??? (in /lib/libglib-2.0.so.0.2200.3) ==4506== by 0x408E5AC: g_slice_alloc (in /lib/libglib-2.0.so.0.2200.3) ==4506== by 0x4061628: g_hash_table_new_full (in /lib/libglib-2.0.so.0.2200.3) ==4506== by 0x40616C7: g_hash_table_new (in /lib/libglib-2.0.so.0.2200.3) ==4506== by 0x8048795: main (dup.c:42) I've tried different ways to freed but no success so far. I'll appreciate any help. Thanks BTW: It compiles and runs fine. #include <stdio.h> #include <string.h> #include <stdlib.h> #include <glib.h> #include <stdint.h> struct s { char *data; }; static GHashTable *hashtable1; static GHashTable *hashtable2; static void add_inv(GHashTable *table, const char *key) { gpointer old_value, old_key; gint value; if(g_hash_table_lookup_extended(table,key, &old_key, &old_value)){ value = GPOINTER_TO_INT(old_value); value = value + 2; /*g_free (old_key);*/ } else { value = 5; } g_hash_table_replace(table, g_strdup(key), GINT_TO_POINTER(value)); } static void print_hash_kv (gpointer key, gpointer value, gpointer user_data){ gchar *k = (gchar *) key; gchar *h = (gchar *) value; printf("%s: %d \n",k, h); } int main(int argc, char *argv[]){ struct s t; t.data = "bar"; int i,j; hashtable1 = g_hash_table_new(g_str_hash, g_str_equal); hashtable2 = g_hash_table_new(g_str_hash, g_str_equal); for(i=0;i<10;i++){ add_inv(hashtable1, t.data); add_inv(hashtable2, t.data); } /*free(t.data);*/ /*free(t.data);*/ g_hash_table_foreach (hashtable1, print_hash_kv, NULL); g_hash_table_foreach (hashtable2, print_hash_kv, NULL); g_hash_table_destroy(hashtable1); g_hash_table_destroy(hashtable2); return 0; }

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  • Can someone explain/annotate this Ruby snippet with comments?

    - by Ronnie
    Could someone please add comments to this code? Or, alternatively, what would be the pseudocode equivalent of this Ruby code? It seems simple enough but I just don't know enough Ruby to convert this to PHP. data = Hash.new({}) mysql_results.each { |r| data[r['year']][r['week']] = r['count'] } (year_low..year_high).each do |year| (1..52).each do |week| puts "#{year} #{week} #{data[year][week]}" end end Any help whatsoever would be really appreciated. Thanks!

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  • Add C pointer to NSMutableArray

    - by Georges Oates Larsen
    I am writing an Objective-C program that deals with low level image memory. I am using ANSI-C structs for my data storage -- Full blown objects seem overkill seeing as the data I am storing is 100% data, with no methods to operate on that data. Specifically, I am writing a customizable posterization algorithm which relies on an array of colors -- This is where things get tricky. I am storing my colors as structs of three floats, and an integer flag (related to the posterization algorithm specifically). Everyhting is going well, except for one thing... [actual question] I can't figure out how to add pointers to an NSMutableArray! I know how to add an object, but adding a pointer to a struct seems to be more difficult -- I do not want NSMutableArray dereferencing my pointer and treating the struct as some sort of strange object. I want NSMutableArray to add the pointer its self to its collection. How do I go about doing this? Thanks in advance, G

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  • Copy and paste between sheets in a workbook with VBA code

    - by Hannah
    Trying to write a macro in VBA for Excel to look at the value in a certain column from each row of data in a list and if that value is "yes" then it copies and pastes the entire row onto a different sheet in the same workbook. Let's name the two sheets "Data" and "Final". I want to have the sheets referenced so it does not matter which sheet I have open when it runs the code. I was going to use a Do loop to cycle through the rows on the one data sheet until it finds there are no more entries, and if statements to check the values. I am confused about how to switch from one sheet to the next. How do I specifically reference cells in different sheets? Here is the pseudocode I had in mind: Do while DataCells(x,1).Value <> " " for each DataCells(x,1).Value="NO" if DataCells(x,2).Value > DataCells(x,3).Value or _ DataCells(x,4).Value < DataCells(x,5).Value 'Copy and paste/insert row x from Data to Final sheet adding a new 'row for each qualifying row else x=x+1 end else if DataCells(x,1).Value="YES" Loop 'copy and paste entire row to a third sheet 'continue this cycle until all rows in the data sheet are examined

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  • Commercial web application--scalable database design

    - by Rob Campbell
    I'm designing a set of web apps to track scientific laboratory data. Each laboratory has several members, each of whom will access both their own data and that of their laboratory as a whole. Many typical queries will thus be expected to return records of multiple members (e.g. my mouse, joe's mouse and sally's mouse). I think I have the database fairly well normalized. I'm now wondering how to ensure that users can efficiently access both their own data and their lab's data set when it is mixed among (hopefully) a whole ton of records from other labs. What I've come up with so far is that most tables will end with two fields: user_id and labgroup_id. The WHERE clause of any SELECT statement will include the appropriate reference to one of the id fields ("...WHERE 'labroup_id=n..." or "...WHERE user_id=n..."). My questions are: Is this an approach that will scale to 10^6 or more records? If so, what's the best way to use these fields in a query so that it most efficiently searches the relevant subset of the database? e.g. Should the first step in querying be to create a temporary table containing just the labgroup's data? Or will indexing using some combination of the id, user_id, and labroup_id fields be sufficient at that scale? I thank any responders very much in advance.

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  • Get jQuery Error if PHP Breaks

    - by Norbert
    I have a PHP script that breaks if a variable is not populated and it isn't added to the database, but jQuery handles this as a success and I get this error: TypeError: Result of expression 'data' [null] is not an object. Here's the jQuery script: $.ajax({ type: "POST", url: "/clase/do-add", data: $("#adauga").serialize(), dataType: "json", error: function (xhr, textStatus, errorThrown) { alert('Try again.'); }, success: function(data) { var dlHTML = '<dl id="' + data.id + '"> [too long] </dl>'; $('form#adauga').after(dlHTML); $('#main dl:first').hide().fadeIn(); adaugaClasaSubmit.removeAttr('disabled'); adaugaClasa.removeAttr('readonly'); adaugaClasa.val("").focus(); } });

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  • Google Chart Number formatting

    - by MizAkita
    I need to format my pie and column charts to show the $ and comma in currency format ($###,###) when you hover over the charts. Right now, it is displaying the number and percentage but the number as #####.## here is my code. Any help would be appreciated. // Load the Visualization API and the piechart package. google.load('visualization', '1.0', {'packages':['corechart']}); // Set a callback to run when the Google Visualization API is loaded. google.setOnLoadCallback(drawChart); var formatter = new google.visualization.NumberFormat({ prefix: '$' }); formatter.format(data, 1); var options = { pieSliceText: 'value' }; // Callback that creates and populates a data table, // instantiates the pie chart, passes in the data and // draws it. function drawChart() { // REVENUE CHART - Create the data table. var data4 = new google.visualization.DataTable(); data4.addColumn('string', 'Status'); data4.addColumn('number', 'In Thousands'); data4.addRows([ ['Net tution & Fees', 213.818], ['Auxiliaries', 30.577], ['Government grants/contracts', 39.436], ['Private grants/gifts', 39.436], ['Investments', 10.083], ['Clinics', 14.353], ['Other', 5.337] ]); // EXPENSES CHART - Create the data table. var data5 = new google.visualization.DataTable(); data5.addColumn('string', 'Status'); data5.addColumn('number', 'Amount'); data5.addRows([ ['Instruction', 133.868], ['Sponsored Progams', 34.940], ['Auxiliaries', 30.064], ['Academic Support', 25.529], ['Depreciation & amortization', 18.548], ['Student Services', 22.626], ['Plant operations & maintenance', 18.105], ['Fundraising', 13.258], ['Geneal Administration', 11.628], ['Interest', 6.846], ['Student Aid', 1.886], ]); // ENDOWMENT CHART - Create the data table. var data6 = new google.visualization.DataTable(); data6.addColumn('string', 'Status'); data6.addColumn('number', 'In Millions'); data6.addRows([ ['2010', 178.7], ['2011', 211.693], ['2012', 199.3] ]); // Set REVENUE chart options var options4 = { is3D: true, fontName: 'Arial', colors:['#AFD8F8', '#F6BD0F', '#8BBA00', '#FF8E46', '#008E8E', '#CCCCCC', '#D64646', '#8E468E'], 'title':'', 'width':550, 'height':250}; // Set EXPENSES chart options var options5 = { is3D: true, fontName: 'Arial', colors:['#AFD8F8', '#F6BD0F', '#8BBA00', '#FF8E46', '#008E8E', '#CCCCCC', '#D64646', '#8E468E'], 'title':'', 'width':550, 'height':250}; // Set ENDOWMENT chart options var options6 = { is3D: true, fontName: 'Arial', colors:['#AFD8F8', '#F6BD0F', '#8BBA00', '#FF8E46', '#008E8E', '#CCCCCC', '#D64646', '#8E468E'], 'title':'', 'width':450, 'height':250}; // Instantiate and draw our chart, passing in some options. var chart4 = new google.visualization.PieChart(document.getElementById('chart_div4')); chart4.draw(data4, options4); var chart5 = new google.visualization.PieChart(document.getElementById('chart_div5')); chart5.draw(data5, options5); var chart6 = new google.visualization.ColumnChart(document.getElementById('chart_div6')); chart6.draw(data6, options6);}

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  • .NET SerialPort.Read skipps bytes

    - by Lukas Rieger
    Solution Reading the data byte wise via "port.ReadByte" is too slow, the problem is inside the SerialPort class. i changed it to reading bigger chunks via "port.Read" and there are now no buffer overruns. although i found the solution myself, writing it down helped me and maybe someone else has the same problem and finds this via google... (how can i mark it as answered?) EDIT 2 by setting port.ReadBufferSize = 2000000; i can delay the problem for ~30 seconds. so it seems, .Net really is too slow... since my application is not that critical, i just set the buffer to 20MB, but i am still interested in the cause. EDIT i just tested something i had not thought of before (shame on me): port.ErrorReceived += (object self, SerialErrorReceivedEventArgs se_arg) => { Console.Write("| Error: {0} | ", System.Enum.GetName(se_arg.EventType.GetType(), se_arg.EventType)); }; and it seems that i have an overrun. Is the .Net implementation too slow for 500k or is there an error on my side? Original Question i built a very primitive oszilloscope (avr, which sends adc data over uart to an ftdi chip). On the pc side i have a WPF Programm that displays this data. The Protokoll is: two sync bytes (0xaffe) - 14 data bytes - two sync bytes - 14 data bytes - ... i use 16bit values, so inside the 14 data bytes are 7 channels (lsb first). I verified the uC Firmware with hTerm, and it does send and receive everything correct. But, if i try to read the data with C#, sometimes some bytes are lost. The oszilloscop programm is a mess, but i created a small sample application, which has the same symptoms. I added two extension methods to a) read one byte from the COM Port and ignore -1 (EOF) and b) wait for the sync pattern. The sample programm first syncs onto the data stream by waiting for (0xaffe) and then compares the received bytes with the expected values. the loop runs a few times until an assert failed message pops up. I could not find anything about lost bytes via google, any help would be appreciated. Code using System; using System.Collections.Generic; using System.Diagnostics; using System.IO.Ports; using System.Linq; using System.Text; using System.Threading.Tasks; namespace SerialTest { public static class SerialPortExtensions { public static byte ReadByteSerial(this SerialPort port) { int i = 0; do { i = port.ReadByte(); } while (i < 0 || i > 0xff); return (byte)i; } public static void WaitForPattern_Ushort(this SerialPort port, ushort pattern) { byte hi = 0; byte lo = 0; do { lo = hi; hi = port.ReadByteSerial(); } while (!(hi == (pattern >> 8) && lo == (pattern & 0x00ff))); } } class Program { static void Main(string[] args) { //500000 8n1 SerialPort port = new SerialPort("COM3", 500000, Parity.None, 8, StopBits.One); port.Open(); port.DiscardInBuffer(); port.DiscardOutBuffer(); //Sync port.WaitForPattern_Ushort(0xaffe); byte hi = 0; byte lo = 0; int val; int n = 0; // Start Loop, the stream is already synced while (true) { //Read 7 16-bit values (=14 Bytes) for (int i = 0; i < 7; i++) { lo = port.ReadByteSerial(); hi = port.ReadByteSerial(); val = ((hi << 8) | lo); Debug.Assert(val != 0xaffe); } //Read two sync bytes lo = port.ReadByteSerial(); hi = port.ReadByteSerial(); val = ((hi << 8) | lo); Debug.Assert(val == 0xaffe); n++; } } } }

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  • Object reference not set to an instance of an object

    - by MBTHQ
    Can anyone help with the following code? I'm trying to get data from the database colum to the datagridview... I'm getting error over here "Dim sql_1 As String = "SELECT * FROM item where item_id = '" + DataGridView_stockout.CurrentCell.Value.ToString() + "'"" Private Sub DataGridView_stockout_CellMouseClick(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewCellMouseEventArgs) Handles DataGridView_stockout.CellMouseClick Dim i As Integer = Stock_checkDataSet1.Tables(0).Rows.Count > 0 Dim thiscur_stok As New System.Data.SqlClient.SqlConnection("Data Source=MBTHQ\SQLEXPRESS;Initial Catalog=stock_check;Integrated Security=True") ' Sql Query Dim sql_1 As String = "SELECT * FROM item where item_id = '" + DataGridView_stockout.CurrentCell.Value.ToString() + "'" ' Create Data Adapter Dim da_1 As New SqlDataAdapter(sql_1, thiscur_stok) ' Fill Dataset and Get Data Table da_1.Fill(Stock_checkDataSet1, "item") Dim dt_1 As DataTable = Stock_checkDataSet1.Tables("item") If i >= DataGridView_stockout.Rows.Count Then 'MessageBox.Show("Sorry, DataGridView_stockout doesn't any row at index " & i.ToString()) Exit Sub End If If 1 >= Stock_checkDataSet1.Tables.Count Then 'MessageBox.Show("Sorry, Stock_checkDataSet1 doesn't any table at index 1") Exit Sub End If If i >= Stock_checkDataSet1.Tables(1).Rows.Count Then 'MessageBox.Show("Sorry, Stock_checkDataSet1.Tables(1) doesn't any row at index " & i.ToString()) Exit Sub End If If Not Stock_checkDataSet1.Tables(1).Columns.Contains("os") Then 'MessageBox.Show("Sorry, Stock_checkDataSet1.Tables(1) doesn't any column named 'os'") Exit Sub End If 'DataGridView_stockout.Item("cs_stockout", i).Value = Stock_checkDataSet1.Tables(0).Rows(i).Item("os") Dim ab As String = Stock_checkDataSet1.Tables(0).Rows(i)(0).ToString() End Sub I keep on getting the error saying "Object reference not set to an instance of an object" I dont know where I'm going wrong. Help really appreciated!!

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  • Generating an Excel file in ASP.NET

    - by Dan Coates
    I am about to add a section to an ASP.NET app (VB.NET codebehind) that will allow a user to get data returned to them as an Excel file, which I will generate based on database data. While there are several ways of doing this, each has its own drawbacks. How would you return the data? I'm looking for something that's as clean and straightforward as possible.

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  • MySQL database Int overflow and can't login in.

    - by Ryan SMith
    I have a MySQL database on my server and I"m pretty sure it's an int over flow on one table with an auto_increment field that's crashing it. I can delete the table, it's not very important, but I can't get into the server. Is there anyway to delete that database from the file system or without logging into MySQL? HELP! THE WORLD IS ENDING!

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