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  • How to read and loop through each rows in an Excel using C#

    - by Ullan
    I need to read an excel file and loop through the rows. I used the below code to read the excel file. But I am not getting the entire row, inseatd of getting the column values. try { OleDbConnection objConnection = new OleDbConnection(strConnectionString); string queryString = string.Format("Select * from [{0}$]", strSheetName, objConnection); OleDbCommand command = new OleDbCommand(queryString, objConnection); objConnection.Open(); OleDbDataReader reader = command.ExecuteReader(); while (reader.Read()) { var val1 = reader[0].ToString(); //Here I want to get each row } reader.Close(); } catch (Exception ex) { Console.WriteLine(ex.Message); } I need to check if the row is empty or not, if not empty, I need to serach for some values in a particular column. Thanks for your help

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  • How to optimize this script

    - by marks34
    I have written the following script. It opens a file, reads each line from it splitting by new line character and deleting first character in line. If line exists it's being added to array. Next each element of array is splitted by whitespace, sorted alphabetically and joined again. Every line is printed because script is fired from console and writes everything to file using standard output. I'd like to optimize this code to be more pythonic. Any ideas ? import sys def main(): filename = sys.argv[1] file = open(filename) arr = [] for line in file: line = line[1:].replace("\n", "") if line: arr.append(line) for line in arr: lines = line.split(" ") lines.sort(key=str.lower) line = ''.join(lines) print line if __name__ == '__main__': main()

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  • JQuery not working in IE7/8

    - by user1665283
    I have been given the following code to implement: <script type="text/javascript"> $(document).ready(function(){ $('.hotspots a').bind('mouseover click', function() { $this = $(this); if($('.hotspot-target').data('hotspot')!=$this.attr('href')) { $('.hotspot-target').data('hotspot', $this.attr('href')); $('.hotspot-target').fadeOut(100, function() { $('.hotspot-target').css({backgroundImage: 'url('+$this.attr('href')+')'}); $('.hotspot-target .detail').hide(); $('.hotspot-target .detail.'+$this.attr('class')).show(); $('.hotspot-target').fadeIn(100); }); } return false; }) }); </script> It works fine in FF and Chrome with no errors in the console. I also can't see any errors in the IE debugger, though I'm not so used to how that works. Is there anything obviously wrong with the above code? It's placed at the end of the page

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  • Why is Python 3.1 throwing a SyntaxError when printing after loop?

    - by bubersson
    Hi, I'm trying to run this snippet in Python 3.1 console and I'm getting SyntaxError: >>> while True: ... a=5 ... if a<6: ... break ... print("hello") File "<stdin>", line 5 print("hello") ^ SyntaxError: invalid syntax >>> (This is just shortened code to make a point.) Am I missing something? Is there some other Magic I don't know about? Thanks for your help (since this is my first StackOverflow question and I'm not a native English speaker)

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  • Error message: "$(window).width is not a function"

    - by Crippletoe
    Hi all, i am trying to use a jQuery scrollbar called "Jscrollhorizontalpane". when i am trying to use it i get the following error message: "$(window).width is not a function" in firebug's console. i am new to jQuery do this might be very basic but still, i dont know what that means and why there is a problem. the scroller comes in a bundle with a few files, one of which is called "jScrollHorizontalPane.js" and i believe it holds the code for the scroller. i tried replacing $ signs there with the word "jQuery" (in case there is a conflict) but it didnt seem to help. also important to add that on the same page i am using another jQuery scroller (a vertical one as opposed to the horizontal on mentioned above) which works just fine and when i examined it's .js file, i could spot lines with "$(window).width". any ideas?

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  • Why does GC.GetTotalMemory() report huge memory allocations?

    - by Seventh Element
    I have been playing around with GC.GetTotalMemory(). When I create a local variable of type Titles in the example below, the consumed amount of memory increases by 6276 bytes. What's going on here? class Program { enum Titles { Mr, Ms, Mrs, Dr }; static void Main(string[] args) { GetTotalMemory(); Titles t = Titles.Dr; GetTotalMemory(); } static void GetTotalMemory() { long bytes = GC.GetTotalMemory(true); Console.WriteLine("{0}", bytes); } }

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  • Object initialization sequence in Objective-C

    - by Alex
    Hello everyone. The Cocoa framework has a convention to always call self = [super init] in the init method of an inherited class, because [super init] may return a new instance. What will happen if I do this? @interface MyClass : NSObject /* or any other class */ { int ivar_; } @end @implementation MyClass - (id)init { ivar_ = 12345; if ((self = [super init])) { NSLog(@"ivar_'s value is %d", ivar_); } return self; } @end In the case when [super init] returns a new instance, what will I see in the console? ivar_'s value is 0? I can't think of a way to check this myself, because I don't know which class may return a new instance from its init method. Also, can't seem to find explicit clarification for this scenario in the docs. Could anyone help me out? Thanks!

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  • How can I implement log4j logging to an existing J2EE Struts web application?

    - by Ruepen
    I have recently inherited a J2EE Struts web app that was written back in 2002. There is no logging in the application other than the odd System.out.println(). I have added log4j logging so that I can write out some info to the console, but I'm concerned on how best to approach this. Any suggestions, tips, best practices would be welcome as I don't want to spend too much time adding logging to every method or class (or trying to find what places where logging would be best - ie. bad code blocks/defects). My current approach is to just add some logging to the few classes that I have been looking at to understand the code, but are there a few key places where I can add logging to maximize my use of adding log4j?

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  • C++ printf std::vector

    - by Sebtm
    How I can do something like this in C++: void my_print(format_string) { vector<string> data; //Fills vector printf(format_string, data); } my_print("%1$s - %2$s - %3$s"); my_print("%3$s - %2$s); I have not explained well before. The format string is entered by the application user. In C# this works: void my_print(format_string) { List<string> data = new List<string>(); //Fills list Console.WriteLine(format_string, data.ToArray); } my_print("{0} - {1} - {2}"); my_print("{2} - {1}");

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  • Why is it when I set "closeOnEscape" to false and then "closeOnEscape" to true jquery dialog escape

    - by chobo2
    Hi I am using jquery ui 1.8 and I have a model dialog that popups up and if a user clicks on a checkbox another one comes up. This requires them to say "yes" or "no" so I removed the "X" on the dialog and put closeOnEscape to false. However I noticed when I did that the model dialog underneath it would close when they hit escape. So now when the one that pops up when the checkbox is checked I disable closeOnEscape on the first dialog box. When they close it I enable again yet it does not work. I am not sure why $("#Dialog").dialog( "option", "closeOnEscape", true); I even do this in firebug. I just open my first dialog up Do this in firebugs console $("#Dialog").dialog( "option", "closeOnEscape", false); Then verify that escape is now disabled. I then try to enable it again $("#Dialog").dialog( "option", "closeOnEscape", true); Yet it never enables.

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  • Removing exception

    - by Nikhil K
    I have used this code for extracting urls from web page.But in the line of 'foreach' it is showing Object reference not set to an instance of an object exception. What is the problem? how can i correct that? WebClient client = new WebClient(); string url = "http://www.google.co.in/search?hl=en&q=java&start=10&sa=N"; string source = client.DownloadString(url); HtmlDocument doc = new HtmlDocument(); doc.LoadHtml(source); foreach (HtmlNode link in doc.DocumentNode.SelectNodes("//a[@href and @rel='nofollow']")) { Console.WriteLine(link.Attributes["href"].Value); }

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  • XML .NET Library

    - by osss
    Is it any XML .net library like simplexml in PHP? For example: <root> <obj> <val>value1</val> </obj> <obj> <val>value1</val> </obj> </root> objects = .....Parse(xml); Console.WriteLine(objects[0].val.ToString());

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  • [C# n MySQL] Creating a database using Connector/NET Programming?

    - by yeeen
    How to create a database using connector/net programming? How come the following doesn't work? string connStr = "server=localhost;user=root;port=3306;password=mysql;"; MySqlConnection conn = new MySqlConnection(connStr); MySqlCommand cmd; string s0; try { conn.Open(); s0 = "CREATE DATABASE IF NOT EXISTS `hello`;"; cmd = new MySqlCommand(s0, conn); conn.Close(); } catch (Exception e) { Console.WriteLine(e.ToString()); }

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  • Delegate Example From C# In Depth Confusion

    - by ChloeRadshaw
    I am looking at this example: List<Product> products = Product. GetSampleProducts() ; products.Sort( (first, second) => first.Name.CompareTo(second. Name) ) ; foreach (Product product in products) { Console. WriteLine(product) ; } What function is actually called in the API when you do that? Does the compiler create a class which implemnents the IComparer interface? I thought delegates were anonymous methods - Here it seems to be an anonymous interface implementation which is casuing confusion

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  • Determining whether a class implements a generic list in a T4 template

    - by James Hollingworth
    I'm writing a T4 template which loads some classes from an assembly, does some analysis of the classes and then generates some code. One particular bit of analysis I need to do is to determine whether the class implements a generic list. I can do this pretty simply in C#, e.g. public class Foo : List<string> { } var t = typeof(Foo); if (t.BaseType != null && t.BaseType.IsGenericType && t.BaseType.GetGenericTypeDefinition() == typeof(List<>))) Console.WriteLine("Win"); However T4 templates use the FXCop introspection engine and so you do not have access to the .net reflection API. I've spent the past couple of hours in Reflector but still can't figure it out. Does anyone have any clues about how to do this?

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  • rails 3.1 partial_updates doesn't seem to work with password

    - by user1306769
    i have a user model with a password attribute, which gets saved as password_digest. What i want to do is have the edit user page and the edit password page separated, so that the admin doesn't need to input the password everytime he needs to change something else. For this i have made an extra action / view. My problem is that when i update the user info, i get password validation errors even though i have no password field in the form. Which leads me to the conclusion that partial_updates isn't working with the password attribute (as i have already tested in the console that it is enabled, and it is) Is this me doing something wrong, or should i approach this differently?

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  • Why does this MSDN example for Func<> delegate have a superfluous Select() call?

    - by Dan
    The MSDN gives this code example in the article on the Func Generic Delegate: Func<String, int, bool> predicate = ( str, index) => str.Length == index; String[] words = { "orange", "apple", "Article", "elephant", "star", "and" }; IEnumerable<String> aWords = words.Where(predicate).Select(str => str); foreach (String word in aWords) Console.WriteLine(word); I understand what all this is doing. What I don't understand is the Select(str => str) bit. Surely that's not needed? If you leave it out and just have IEnumerable<String> aWords = words.Where(predicate); then you still get an IEnumerable back that contains the same results, and the code prints the same thing. Am I missing something, or is the example misleading?

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  • PHP and Javascript: Getting file contents with Javascript variable

    - by celliott1997
    Could someone help me to understand why this isn't working? var uname = "<?php echo strtolower($_GET['un']) ?>"; var source = "<?php echo file_get_contents('accounts/"+uname+"') ?>"; console.log(source); I've been trying for a while to get this working and it just doesn't seem to. Before I added in the source variable, it was working fine and displayed the un variable on the page. Thanks.

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  • TextMate: Preview in Firefox without having to save document first?

    - by hced
    Using TextMate: Is it possible to assign a shortcut to preview/refresh the currently edited HTML document in, say, Firefox, without having to first hit Save? I'm looking for the same functionality as TextMate's built-in Web Preview window, but I'd prefer an external browser instead of TextMate's. (Mainly in order to use a JavaScript console such as Firebug for instance). Would it be possible to pipe the currently unsaved document through the shell and then preview in Firefox. And if so, is there anyone having a TextMate command for this, willing to share it?

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  • C# Add class instance with internal timer to a static List, is it safe?

    - by CodeMongo
    My program has a static list of type classA. ClassA implements a threading timer that executes a task. The list may contain as many instances of classA as desired. Is this technique causing threading issues where the class instances can block each other? It that is the case how can I solve the that problem. ex: static List<MyClassType> list=null; void static Main() { list = new List<MyClassType>(); var a = new MyClassType(); var b = new MyClassType(); list.Add(a); list.Add(b); Console.ReadKey(); } a and b will execute theire internal task based on the timer.Is it s bsd technique? Why?

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  • structure in .NET

    - by redpaladin
    My problem is very simple.. My problem is to send a structure beetween a program in C to a C# program.. I made a struct in C#: public struct NetPoint { public float lat; // 4 bytes public float lon; // 4 bytes public int alt; // 4 bytes public long time; // 8 bytes } Total size of the struct must be 20 bytes When i do a sizeof() of this struct System.Diagnostics.Debug.WriteLine("SizeOf(NetPoint)=" + System.Runtime.InteropServices.Marshal.SizeOf(new NetPoint())); The debug console show : SizeOf(NetPoint)=24 But i expected to have 20 bytes ? Why do I have a difference ? Thank you in advance

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  • cygwin c sem_init

    - by RileyVanZeeland
    if((sem_init(sem, 1, 1)) == 1) perror("error initiating sem"); If I include this line of code my program simply starts and exits. I just started learning how to use semaphores. I'm using cygwin and when this line is commented out the printf's ABOVE this print to console but when include this, nothing happens. I did the following to get cygserver going- CYGWIN=server ran /bin/cygserver-config ran /usr/sbin/cygserver for the config it said the cygserver is already running And for the sygserver it saids- initailaizing complete failed to created named pipe: is the daemon already running? fatal error on IPC transport: closing down Any ideas?

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  • String.Format with NumberGroupSeparator outputting 0xa0 not comma

    - by andrevdm
    I'm seeing strange results when doing a string.Format( "C" ); E.g. double val = 123456.78; Console.WriteLine( val.ToString( "C" ) ); This prints the thousand separator as 0xa0 rather than a comma (0x2c). I get the same result if I use string.Format( "{0:0,0.00}", 1234567.12D ); Here is the full output R 123ÿ456,78 52333A333233 201230456C78 My regional settings are English (South African) and I'm getting the same result on multiple machines. Any ideas? Thanks.

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  • Carousel stopped working

    - by DenMed
    I can't get why, but suddenly my Bootstrap Carousel stopped working. I want it starts onload. Error from Chrome Console: Uncaught TypeError: Object [object Object] has no method 'carousel' :3000/assets/application.js?body=1:18 (anonymous function) :3000/assets/application.js?body=1:18 jQuery.Callbacks.fire jquery-1.7.2.js:1076 jQuery.Callbacks.self.fireWith jquery-1.7.2.js:1194 jQuery.extend.ready jquery-1.7.2.js:436 DOMContentLoaded jquery-1.7.2.js:950 In my application.js: $('.carousel').carousel({ interval: 2000 }) In my layout: <%= javascript_include_tag 'jquery-1.7.2', 'jquery.validate.min','application' %> Where is problem ?

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