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  • Getting Started with jqChart for ASP.NET Web Forms

    - by jqChart
    Official Site | Samples | Download | Documentation | Forum | Twitter Introduction jqChart takes advantages of HTML5 Canvas to deliver high performance client-side charts and graphs across browsers (IE 6+, Firefox, Chrome, Opera, Safari) and devices, including iOS and Android mobile devices. Some of the key features are: High performance rendering. Animaitons. Scrolling/Zoooming. Support for unlimited number of data series and data points. Support for unlimited number of chart axes. True DateTime Axis. Logarithmic and Reversed axis scale. Large set of chart types - Bar, Column, Pie, Line, Spline, Area, Scatter, Bubble, Radar, Polar. Financial Charts - Stock Chart and Candlestick Chart. The different chart types can be easily combined.  System Requirements Browser Support jqChart supports all major browsers: Internet Explorer - 6+ Firefox Google Chrome Opera Safari jQuery version support jQuery JavaScript framework is required. We recommend using the latest official stable version of the jQuery library. Visual Studio Support jqChart for ASP.NET does not require using Visual Studio. You can use your favourite code editor. Still, the product has been tested with several versions of Visual Studio .NET and you can find the list of supported versions below: Visual Studio 2008 Visual Studio 2010 Visual Studio 2012 ASP.NET Web Forms support Supported version - ASP.NET Web Forms 3.5, 4.0 and 4.5 Installation Download and unzip the contents of the archive to any convenient location. The package contains the following folders: [bin] - Contains the assembly DLLs of the product (JQChart.Web.dll) for WebForms 3.5, 4.0 and 4.5. This is the assembly that you can reference directly in your web project (or better yet, add it to your ToolBox and then drag & drop it from there). [js] - The javascript files of jqChart and jqRangeSlider (and the needed libraries). You need to include them in your ASPX page, in order to gain the client side functionality of the chart. The first file is "jquery-1.5.1.min.js" - this is the official jQuery library. jqChart is built upon jQuery library version 1.4.3. The second file you need is the "excanvas.js" javascript file. It is used from the versions of IE, which dosn't support canvas graphics. The third is the jqChart javascript code itself, located in "jquery.jqChart.min.js". The last one is the jqRangeSlider javascript, located in "jquery.jqRangeSlider.min.js". It is used when the chart zooming is enabled. [css] - Contains the Css files that the jqChart and the jqRangeSlider need. [samples] - Contains some examples that use the jqChart. For full list of samples plese visit - jqChart for ASP.NET Samples. [themes] - Contains the themes shipped with the products. It is used from the jqRangeSlider. Since jqRangeSlider supports jQuery UI Themeroller, any theme compatible with jQuery UI ThemeRoller will work for jqRangeSlider as well. You can download any additional themes directly from jQuery UI's ThemeRoller site available here: http://jqueryui.com/themeroller/ or reference them from Microsoft's / Google's CDN. <link rel="stylesheet" type="text/css" media="screen" href="http://ajax.aspnetcdn.com/ajax/jquery.ui/1.8.21/themes/smoothness/jquery-ui.css" /> The final result you will have in an ASPX page containing jqChart would be something similar to that (assuming you have copied the [js] to the Script folder and [css] to Content folder of your ASP.NET site respectively). <%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="samples_cs.Default" %> <%@ Register Assembly="JQChart.Web" Namespace="JQChart.Web.UI.WebControls" TagPrefix="jqChart" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html > <head runat="server"> <title>jqChart ASP.NET Sample</title> <link rel="stylesheet" type="text/css" href="~/Content/jquery.jqChart.css" /> <link rel="stylesheet" type="text/css" href="~/Content/jquery.jqRangeSlider.css" /> <link rel="stylesheet" type="text/css" href="~/Content/themes/smoothness/jquery-ui-1.8.21.css" /> <script src="<% = ResolveUrl("~/Scripts/jquery-1.5.1.min.js") %>" type="text/javascript"></script> <script src="<% = ResolveUrl("~/Scripts/jquery.jqRangeSlider.min.js") %>" type="text/javascript"></script> <script src="<% = ResolveUrl("~/Scripts/jquery.jqChart.min.js") %>" type="text/javascript"></script> <!--[if IE]><script lang="javascript" type="text/javascript" src="<% = ResolveUrl("~/Scripts/excanvas.js") %>"></script><![endif]--> </head> <body> <form id="form1" runat="server"> <asp:ObjectDataSource ID="ObjectDataSource1" runat="server" SelectMethod="GetData" TypeName="SamplesBrowser.Models.ChartData"></asp:ObjectDataSource> <jqChart:Chart ID="Chart1" Width="500px" Height="300px" runat="server" DataSourceID="ObjectDataSource1"> <Title Text="Chart Title"></Title> <Animation Enabled="True" Duration="00:00:01" /> <Axes> <jqChart:CategoryAxis Location="Bottom" ZoomEnabled="true"> </jqChart:CategoryAxis> </Axes> <Series> <jqChart:ColumnSeries XValuesField="Label" YValuesField="Value1" Title="Column"> </jqChart:ColumnSeries> <jqChart:LineSeries XValuesField="Label" YValuesField="Value2" Title="Line"> </jqChart:LineSeries> </Series> </jqChart:Chart> </form> </body> </html>   Official Site | Samples | Download | Documentation | Forum | Twitter

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  • Multiple or single index in Lucene?

    - by Bruno Reis
    I have to index different kinds of data (text documents, forum messages, user profile data, etc) that should be searched together (ie, a single search would return results of the different kinds of data). What are the advantages and disadvantages of having multiple indexes, one for each type of data? And the advantages and disadvantages of having a single index for all kinds of data? Thank you.

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  • Public property List needs to Concat 2 types with inheritance

    - by Bernard
    I have 2 lists: one of type A and one of type Aa. type Aa is inherited from type A. So: List<A> listA = new List<A>(); List<Aa> listAa = new List<Aa>(); with class Aa : A I have: public property Lists<A> { get { List<A> newList = new List<A>(); //return concat of both lists foreach(List l in listA) { newList.Add(l); } foreach(List l in listAa) { newList.Add(l); } } Can I somehow use Concat instead of the foreach loop? i.e. get { return listA.Concat(listAa); } // this doesn't work And secondly, how do I do the set part of the property? set { //figure out the type of variable value and put into appropriate list? }

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  • /etc/postfix/transport missing; what should it look like?

    - by Thufir
    I'm following the mailman guide but couldn't locate /etc/postfix/ so created it as follows: root@dur:~# root@dur:~# cat /etc/postfix/transport dur.bounceme.net mailman: root@dur:~# root@dur:~# telnet localhost 25 Trying 127.0.0.1... Connected to localhost. Escape character is '^]'. 220 dur.bounceme.net ESMTP Postfix (Ubuntu) ehlo fqdn_test 250-dur.bounceme.net 250-PIPELINING 250-SIZE 10240000 250-VRFY 250-ETRN 250-STARTTLS 250-ENHANCEDSTATUSCODES 250-8BITMIME 250 DSN mail from:[email protected] 250 2.1.0 Ok rcpt to:thufir@localhost 451 4.3.0 <thufir@localhost>: Temporary lookup failure rcpt to:[email protected] 451 4.3.0 <[email protected]>: Temporary lookup failure quit 221 2.0.0 Bye Connection closed by foreign host. root@dur:~# root@dur:~# postconf -n alias_database = hash:/etc/aliases alias_maps = hash:/etc/aliases, hash:/var/lib/mailman/data/aliases append_dot_mydomain = no biff = no broken_sasl_auth_clients = yes config_directory = /etc/postfix default_transport = smtp home_mailbox = Maildir/ inet_interfaces = loopback-only mailbox_command = /usr/lib/dovecot/deliver -c /etc/dovecot/conf.d/01-mail-stack-delivery.conf -m "${EXTENSION}" mailbox_size_limit = 0 mailman_destination_recipient_limit = 1 mydestination = dur, dur.bounceme.net, localhost.bounceme.net, localhost myhostname = dur.bounceme.net mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128 readme_directory = no recipient_delimiter = + relay_domains = lists.dur.bounceme.net relay_transport = relay relayhost = smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache smtp_use_tls = yes smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu) smtpd_recipient_restrictions = reject_unknown_sender_domain, reject_unknown_recipient_domain, reject_unauth_pipelining, permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination smtpd_sasl_auth_enable = yes smtpd_sasl_authenticated_header = yes smtpd_sasl_local_domain = $myhostname smtpd_sasl_path = private/dovecot-auth smtpd_sasl_security_options = noanonymous smtpd_sasl_type = dovecot smtpd_tls_auth_only = yes smtpd_tls_cert_file = /etc/ssl/certs/ssl-mail.pem smtpd_tls_key_file = /etc/ssl/private/ssl-mail.key smtpd_tls_mandatory_ciphers = medium smtpd_tls_mandatory_protocols = SSLv3, TLSv1 smtpd_tls_received_header = yes smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache smtpd_use_tls = yes tls_random_source = dev:/dev/urandom transport_maps = hash:/etc/postfix/transport root@dur:~# root@dur:~# tail /var/log/mail.log Aug 28 02:05:15 dur postfix/smtpd[20326]: connect from localhost[127.0.0.1] Aug 28 02:06:10 dur postfix/smtpd[20326]: warning: hash:/var/lib/mailman/data/aliases is unavailable. open database /var/lib/mailman/data/aliases.db: No such file or directory Aug 28 02:06:10 dur postfix/smtpd[20326]: warning: hash:/var/lib/mailman/data/aliases lookup error for "thufir@localhost" Aug 28 02:06:10 dur postfix/smtpd[20326]: NOQUEUE: reject: RCPT from localhost[127.0.0.1]: 451 4.3.0 <thufir@localhost>: Temporary lookup failure; from=<[email protected]> to=<thufir@localhost> proto=ESMTP helo=<fqdn_test> Aug 28 02:06:23 dur postfix/smtpd[20326]: warning: hash:/var/lib/mailman/data/aliases is unavailable. open database /var/lib/mailman/data/aliases.db: No such file or directory Aug 28 02:06:23 dur postfix/smtpd[20326]: warning: hash:/var/lib/mailman/data/aliases lookup error for "[email protected]" Aug 28 02:06:23 dur postfix/smtpd[20326]: NOQUEUE: reject: RCPT from localhost[127.0.0.1]: 451 4.3.0 <[email protected]>: Temporary lookup failure; from=<[email protected]> to=<[email protected]> proto=ESMTP helo=<fqdn_test> Aug 28 02:06:28 dur postfix/smtpd[20326]: disconnect from localhost[127.0.0.1] Aug 28 02:06:49 dur dovecot: pop3-login: Login: user=<thufir>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, mpid=20338, TLS Aug 28 02:06:49 dur dovecot: pop3(thufir): Disconnected: Logged out top=0/0, retr=0/0, del=0/0, size=0 root@dur:~# The manual page is here.

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  • XML and XSLT: need it to sort only certain child nodes

    - by MT
    Hello, I need to have my XSLT stylesheet sort my XML file's child nodes, but only certain ones. Here's an example of what the XML is like: <?xml version="1.0"?> <xmltop> <child1 num="1"> <data>12345</data> </child1> <child1 num="2"> <data>12345</data> </child1> <child2 num="3"> <data>12345</data> </child2> <child2 num="2"> <data>12345</data> </child2> <child2 num="1"> <data>12345</data> </child2> </xmltop> And this is the XSL file I'm using: <xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"> <xsl:template match="/xmltop"> <xsl:copy> <xsl:apply-templates> <xsl:sort select="@num"/> </xsl:apply-templates> </xsl:copy> </xsl:template> <xsl:template match="child2"> <xsl:copy-of select="."/> </xsl:template> </xsl:stylesheet> This creates problems for me because the nodes are stripped of their tags, and their contents remain, making my XML invalid. I'm not really an expert at XSL so pardon me if this is a dumb question. The <child2>'s are sorted properly. Thank you.

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  • converting NSMutableData to NSMutableDictionary?

    - by senthilmuthu
    hi, i am accumulating data from NSMutableDictionary to NSMutabledata like NSMutableData *data = [receivedData objectForKey:@"tag1"]; and also data = [receivedData objectForKey:@"tag2"]; after this one , how can i get data for @"tag2" only from NSMutableData? NSMutableData tag2Data = [Data forKey:@"tag2"]; is not working?

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  • One to two relationship in Doctrine with YAML

    - by Jeremy DeGroot
    I'm working on my first Symfony project with Doctrine, and I've run into a hitch. I'm trying to express a game with two players. The relationship I want to have is PlayerOne and PlayerTwo each being keyed to an ID in the Users table. This is part of what I've got so far: Game: actAs: { Timestampable:- } columns: id: { type: integer, notnull: true, unique: true } startDate: { type: timestamp, notnull: true } playerOne: { type: integer, notnull: true } playerTwo: { type: integer, notnull: true } winner: { type: integer, notnull:true, default:0 } relations: User: { onUpdate: cascade, local: playerOne, foreign: id} User: { onUpdate: cascade, local: playerTwo, foreign: id} That doesn't work. It builds fine, but the SQL it generates only includes a constraint for playerTwo. I've tried a few other things: User: { onUpdate: cascade, local: [playerOne, playerTwo], foreign: id} Also: User: [{ onUpdate: cascade, local: playerOne, foreign: id}, { onUpdate: cascade, local: playerTwo, foreign: id}] Those last two throw errors when I try to build. Is there anyone out there who understands what I'm trying to do and can help me achieve it?

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  • InputDispatcher Error

    - by StarDust
    INFO/ActivityManager(68): Process com.example (pid 390) has died. ERROR/InputDispatcher(68): channel '406ed580 com.example/com.example.afeTest (server)' ~ Consumer closed input channel or an error occurred. events=0x8 ERROR/InputDispatcher(68): channel '406ed580 com.example/com.example.afeTest (server)' ~ Channel is unrecoverably broken and will be disposed! ERROR/InputDispatcher(68): Received spurious receive callback for unknown input channel. fd=165, events=0x8 Can anyone tell what may be the reason behind this error? I've ported a native code on the Android-ndk. One thing I noticed regarding fd (that may be some reason :S) My code uses fd_sets which was defined in winsock2.h But I didn't find fd_sets defined in android-ndk. So I had included "select.h" where fd_set is a typedef in the android-ndk: typedef __kernel_fd_set fd_set; Here is the log cat: 04-06 11:15:32.405: INFO/DEBUG(31): *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** 04-06 11:15:32.405: INFO/DEBUG(31): Build fingerprint: 'generic/sdk/generic:2.3.3/GRI34/101070:eng/test-keys' 04-06 11:15:32.415: INFO/DEBUG(31): pid: 335, tid: 348 >>> com.example <<< 04-06 11:15:32.426: INFO/DEBUG(31): signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr deadbaad 04-06 11:15:32.426: INFO/DEBUG(31): r0 deadbaad r1 0000000c r2 00000027 r3 00000000 04-06 11:15:32.445: INFO/DEBUG(31): r4 00000080 r5 afd46668 r6 0000a000 r7 00000078 04-06 11:15:32.445: INFO/DEBUG(31): r8 804ab00d r9 002a9778 10 00100000 fp 00000001 04-06 11:15:32.445: INFO/DEBUG(31): ip ffffffff sp 44295d10 lr afd19375 pc afd15ef0 cpsr 00000030 04-06 11:15:32.756: INFO/DEBUG(31): #00 pc 00015ef0 /system/lib/libc.so 04-06 11:15:32.756: INFO/DEBUG(31): #01 pc 00013852 /system/lib/libc.so 04-06 11:15:32.767: INFO/DEBUG(31): code around pc: 04-06 11:15:32.785: INFO/DEBUG(31): afd15ed0 68241c23 d1fb2c00 68dae027 d0042a00 04-06 11:15:32.785: INFO/DEBUG(31): afd15ee0 20014d18 6028447d 48174790 24802227 04-06 11:15:32.785: INFO/DEBUG(31): afd15ef0 f7f57002 2106eb56 ec92f7f6 0563aa01 04-06 11:15:32.796: INFO/DEBUG(31): afd15f00 60932100 91016051 1c112006 e818f7f6 04-06 11:15:32.807: INFO/DEBUG(31): afd15f10 2200a905 f7f62002 f7f5e824 2106eb42 04-06 11:15:32.815: INFO/DEBUG(31): code around lr: 04-06 11:15:32.815: INFO/DEBUG(31): afd19354 b0834a0d 589c447b 26009001 686768a5 04-06 11:15:32.825: INFO/DEBUG(31): afd19364 220ce008 2b005eab 1c28d003 47889901 04-06 11:15:32.836: INFO/DEBUG(31): afd19374 35544306 d5f43f01 2c006824 b003d1ee 04-06 11:15:32.836: INFO/DEBUG(31): afd19384 bdf01c30 000281a8 ffffff88 1c0fb5f0 04-06 11:15:32.846: INFO/DEBUG(31): afd19394 43551c3d a904b087 1c16ac01 604d9004 04-06 11:15:32.856: INFO/DEBUG(31): stack: 04-06 11:15:32.856: INFO/DEBUG(31): 44295cd0 00000408 04-06 11:15:32.867: INFO/DEBUG(31): 44295cd4 afd18407 /system/lib/libc.so 04-06 11:15:32.875: INFO/DEBUG(31): 44295cd8 afd4270c /system/lib/libc.so 04-06 11:15:32.875: INFO/DEBUG(31): 44295cdc afd426b8 /system/lib/libc.so 04-06 11:15:32.885: INFO/DEBUG(31): 44295ce0 00000000 04-06 11:15:32.896: INFO/DEBUG(31): 44295ce4 afd19375 /system/lib/libc.so 04-06 11:15:32.896: INFO/DEBUG(31): 44295ce8 804ab00d /data/data/com.example/lib/libAFE.so 04-06 11:15:32.896: INFO/DEBUG(31): 44295cec afd183d9 /system/lib/libc.so 04-06 11:15:32.906: INFO/DEBUG(31): 44295cf0 00000078 04-06 11:15:32.906: INFO/DEBUG(31): 44295cf4 00000000 04-06 11:15:32.906: INFO/DEBUG(31): 44295cf8 afd46668 04-06 11:15:32.906: INFO/DEBUG(31): 44295cfc 0000a000 [heap] 04-06 11:15:32.916: INFO/DEBUG(31): 44295d00 00000078 04-06 11:15:32.927: INFO/DEBUG(31): 44295d04 afd18677 /system/lib/libc.so 04-06 11:15:32.927: INFO/DEBUG(31): 44295d08 df002777 04-06 11:15:32.945: INFO/DEBUG(31): 44295d0c e3a070ad 04-06 11:15:32.945: INFO/DEBUG(31): #00 44295d10 002c43a0 [heap] 04-06 11:15:32.945: INFO/DEBUG(31): 44295d14 002a9900 [heap] 04-06 11:15:32.956: INFO/DEBUG(31): 44295d18 afd46608 04-06 11:15:32.966: INFO/DEBUG(31): 44295d1c afd11010 /system/lib/libc.so 04-06 11:15:32.976: INFO/DEBUG(31): 44295d20 002c4298 [heap] 04-06 11:15:32.976: INFO/DEBUG(31): 44295d24 fffffbdf 04-06 11:15:33.006: INFO/DEBUG(31): 44295d28 000000da 04-06 11:15:33.006: INFO/DEBUG(31): 44295d2c afd46450 04-06 11:15:33.006: INFO/DEBUG(31): 44295d30 000001b4 04-06 11:15:33.026: INFO/DEBUG(31): 44295d34 afd13857 /system/lib/libc.so 04-06 11:15:33.026: INFO/DEBUG(31): #01 44295d38 afd46450 04-06 11:15:33.035: INFO/DEBUG(31): 44295d3c afd13857 /system/lib/libc.so 04-06 11:15:33.056: INFO/DEBUG(31): 44295d40 804ab00d /data/data/com.example/lib/libAFE.so 04-06 11:15:33.056: INFO/DEBUG(31): 44295d44 44295e8c 04-06 11:15:33.056: INFO/DEBUG(31): 44295d48 804ab00d /data/data/com.example/lib/libAFE.so 04-06 11:15:33.056: INFO/DEBUG(31): 44295d4c 804bfec3 /data/data/com.example/lib/libAFE.so 04-06 11:15:33.056: INFO/DEBUG(31): 44295d50 002c43a0 [heap] 04-06 11:15:33.066: INFO/DEBUG(31): 44295d54 44295e8c 04-06 11:15:33.066: INFO/DEBUG(31): 44295d58 804ab00d /data/data/com.example/lib/libAFE.so 04-06 11:15:33.076: INFO/DEBUG(31): 44295d5c 002a9778 [heap] 04-06 11:15:33.085: INFO/DEBUG(31): 44295d60 00000078 04-06 11:15:33.085: INFO/DEBUG(31): 44295d64 afd14769 /system/lib/libc.so 04-06 11:15:33.085: INFO/DEBUG(31): 44295d68 44295e8c 04-06 11:15:33.085: INFO/DEBUG(31): 44295d6c 805d9763 /data/data/com.example/lib/libAFE.so 04-06 11:15:33.085: INFO/DEBUG(31): 44295d70 44295e8c 04-06 11:15:33.085: INFO/DEBUG(31): 44295d74 8051dc35 /data/data/com.example/lib/libAFE.so 04-06 11:15:33.085: INFO/DEBUG(31): 44295d78 0000003a 04-06 11:15:33.085: INFO/DEBUG(31): 44295d7c 002a9900 [heap] 04-06 11:15:37.126: DEBUG/Zygote(33): Process 335 terminated by signal (11) 04-06 11:15:37.146: INFO/ActivityManager(68): Process com.example (pid 335) has died. 04-06 11:15:37.178: ERROR/InputDispatcher(68): channel '406f03a0 com.example/com.example.afeTest (server)' ~ Consumer closed input channel or an error occurred. events=0x8 04-06 11:15:37.178: ERROR/InputDispatcher(68): channel '406f03a0 com.example/com.example.afeTest (server)' ~ Channel is unrecoverably broken and will be disposed! 04-06 11:15:37.185: INFO/BootReceiver(68): Copying /data/tombstones/tombstone_09 to DropBox (SYSTEM_TOMBSTONE) 04-06 11:15:37.576: DEBUG/dalvikvm(68): GC_FOR_MALLOC freed 266K, 47% free 4404K/8199K, external 3520K/3903K, paused 306ms 04-06 11:15:37.835: DEBUG/dalvikvm(68): GC_FOR_MALLOC freed 203K, 47% free 4457K/8391K, external 3520K/3903K, paused 120ms 04-06 11:15:37.886: INFO/WindowManager(68): WIN DEATH: Window{406f03a0 com.example/com.example.afeTest paused=false} 04-06 11:15:38.095: DEBUG/dalvikvm(68): GC_FOR_MALLOC freed 67K, 47% free 4518K/8391K, external 3511K/3903K, paused 94ms 04-06 11:15:38.095: INFO/dalvikvm-heap(68): Grow heap (frag case) to 10.575MB for 196628-byte allocation 04-06 11:15:38.126: DEBUG/dalvikvm(126): GC_EXPLICIT freed 110K, 51% free 2903K/5895K, external 4701K/5293K, paused 2443ms 04-06 11:15:38.217: DEBUG/dalvikvm(68): GC_FOR_MALLOC freed 1K, 46% free 4708K/8647K, external 3511K/3903K, paused 96ms 04-06 11:15:38.225: INFO/WindowManager(68): WIN DEATH: Window{406f72f8 com.example/com.example.afeTest paused=false} 04-06 11:15:38.405: DEBUG/dalvikvm(68): GC_FOR_MALLOC freed 492K, 50% free 4345K/8647K, external 3511K/3903K, paused 96ms 04-06 11:15:38.485: ERROR/InputDispatcher(68): Received spurious receive callback for unknown input channel. fd=164, events=0x8

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  • Passing a parameter so that it cannot be changed – C#

    - by nmarun
    I read this requirement of not allowing a user to change the value of a property passed as a parameter to a method. In C++, as far as I could recall (it’s been over 10 yrs, so I had to refresh memory), you can pass ‘const’ to a function parameter and this ensures that the parameter cannot be changed inside the scope of the function. There’s no such direct way of doing this in C#, but that does not mean it cannot be done!! Ok, so this ‘not-so-direct’ technique depends on the type of the parameter – a simple property or a collection. Parameter as a simple property: This is quite easy (and you might have guessed it already). Bulent Ozkir clearly explains how this can be done here. Parameter as a collection property: Obviously the above does not work if the parameter is a collection of some type. Let’s dig-in. Suppose I need to create a collection of type KeyTitle as defined below. 1: public class KeyTitle 2: { 3: public int Key { get; set; } 4: public string Title { get; set; } 5: } My class is declared as below: 1: public class Class1 2: { 3: public Class1() 4: { 5: MyKeyTitleList = new List<KeyTitle>(); 6: } 7: 8: public List<KeyTitle> MyKeyTitleList { get; set; } 9: public ReadOnlyCollection<KeyTitle> ReadonlyKeyTitleCollection 10: { 11: // .AsReadOnly creates a ReadOnlyCollection<> type 12: get { return MyKeyTitleList.AsReadOnly(); } 13: } 14: } See the .AsReadOnly() method used in the second property? As MSDN says it: “Returns a read-only IList<T> wrapper for the current collection.” Knowing this, I can implement my code as: 1: public static void Main() 2: { 3: Class1 class1 = new Class1(); 4: class1.MyKeyTitleList.Add(new KeyTitle { Key = 1, Title = "abc" }); 5: class1.MyKeyTitleList.Add(new KeyTitle { Key = 2, Title = "def" }); 6: class1.MyKeyTitleList.Add(new KeyTitle { Key = 3, Title = "ghi" }); 7: class1.MyKeyTitleList.Add(new KeyTitle { Key = 4, Title = "jkl" }); 8:  9: TryToModifyCollection(class1.MyKeyTitleList.AsReadOnly()); 10:  11: Console.ReadLine(); 12: } 13:  14: private static void TryToModifyCollection(ReadOnlyCollection<KeyTitle> readOnlyCollection) 15: { 16: // can only read 17: for (int i = 0; i < readOnlyCollection.Count; i++) 18: { 19: Console.WriteLine("{0} - {1}", readOnlyCollection[i].Key, readOnlyCollection[i].Title); 20: } 21: // Add() - not allowed 22: // even the indexer does not have a setter 23: } The output is as expected: The below image shows two things. In the first line, I’ve tried to access an element in my read-only collection through an indexer. It shows that the ReadOnlyCollection<> does not have a setter on the indexer. The second line tells that there’s no ‘Add()’ method for this type of collection. The capture below shows there’s no ‘Remove()’ method either, there-by eliminating all ways of modifying a collection. Mission accomplished… right? Now, even if you have a collection of different type, all you need to do is to somehow cast (used loosely) it to a List<> and then do a .AsReadOnly() to get a ReadOnlyCollection of your custom collection type. As an example, if you have an IDictionary<int, string>, you can create a List<T> of this type with a wrapper class (KeyTitle in our case). 1: public IDictionary<int, string> MyDictionary { get; set; } 2:  3: public ReadOnlyCollection<KeyTitle> ReadonlyDictionary 4: { 5: get 6: { 7: return (from item in MyDictionary 8: select new KeyTitle 9: { 10: Key = item.Key, 11: Title = item.Value, 12: }).ToList().AsReadOnly(); 13: } 14: } Cool huh? Just one thing you need to know about the .AsReadOnly() method is that the only way to modify your ReadOnlyCollection<> is to modify the original collection. So doing: 1: public static void Main() 2: { 3: Class1 class1 = new Class1(); 4: class1.MyKeyTitleList.Add(new KeyTitle { Key = 1, Title = "abc" }); 5: class1.MyKeyTitleList.Add(new KeyTitle { Key = 2, Title = "def" }); 6: class1.MyKeyTitleList.Add(new KeyTitle { Key = 3, Title = "ghi" }); 7: class1.MyKeyTitleList.Add(new KeyTitle { Key = 4, Title = "jkl" }); 8: TryToModifyCollection(class1.MyKeyTitleList.AsReadOnly()); 9:  10: Console.WriteLine(); 11:  12: class1.MyKeyTitleList.Add(new KeyTitle { Key = 5, Title = "mno" }); 13: class1.MyKeyTitleList[2] = new KeyTitle{Key = 3, Title = "GHI"}; 14: TryToModifyCollection(class1.MyKeyTitleList.AsReadOnly()); 15:  16: Console.ReadLine(); 17: } Gives me the output of: See that the second element’s Title is changed to upper-case and the fifth element also gets displayed even though we’re still looping through the same ReadOnlyCollection<KeyTitle>. Verdict: Now you know of a way to implement ‘Method(const param1)’ in your code!

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  • Subscribing to a ObservableCollection via reflection

    - by Julian Lettner
    How can I subscribe to a ObservableCollection<??> without knowing the element type of the collection? Is there a way to do this without too many 'magic strings'? This is a question for the .NET version 3.5. I think 4.0 would make my life much easier, right? Type type = collection.GetType(); if(type.IsGenericType && type.GetGenericTypeDefinition() == typeof(ObservableCollection<>)) { // I cannot cast the collection here ObservableCollection<object> x = collection; } Thanks for your time.

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  • Place an object on top of stack in ILGenerator

    - by KiNGPiN
    I have to pass a function an instance of an object, so obviously all the information to be taken as argument is to be loaded onto the evaluation stack Here is the code that i am looking for someClass SomeObject = new someClass(); il.Emit(OpCodes.LoadObject, SomeObject); il.Emit(OpCodes.CallVirt, MethodInfo Function); public void Function(Object obj) { Type type = typeof(obj); //do something w.r.t to the type } I dont require any information stored in the class just the type and i cannot use any of the primitive types to take my decision on Last i read that i can use a pointer to load the type using some opcodes ... but i am completely lost here, any help or pointers to the right direction would be great :)

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  • Limit JavaScript and CSS files on ASP.NET MVC 2 Master Page based on Model and View content

    - by Zack Peterson
    I want to include certain .js and .css files only on pages that need them. For example, my EditorTemplate DateTime.ascx needs files anytimec.js and anytimec.css. That template is applied whenever I use either the EditorFor or EditorForModel helper methods in a view for a model with a DateTime type value. I've put this condition into the <head> section of my master page. It checks for a DateTime type property in the ModelMetadata. <% if (this.ViewData.ModelMetadata.Properties.Any(p => p.ModelType == typeof(DateTime))) { %> <link href="../../Content/anytimec.css" rel="stylesheet" type="text/css" /> <script src="../../Scripts/anytimec.js" type="text/javascript"></script> <% } %> This has two problems: Fails if I have nested child models of type DateTime Unnecessarily triggered by views without EditorFor or EditorForModel methods (example: DisplayForModel) How can I improve this technique?

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  • Strange behavior with gcc inline assembly

    - by Chris
    When inlining assembly in gcc, I find myself regularly having to add empty asm blocks in order to keep variables alive in earlier blocks, for example: asm("rcr $1,%[borrow];" "movq 0(%[b_],%[i],8),%%rax;" "adcq %%rax,0(%[r_top],%[i],8);" "rcl $1,%[borrow];" : [borrow]"+r"(borrow) : [i]"r"(i),[b_]"r"(b_.data),[r_top]"r"(r_top.data) : "%rax","%rdx"); asm("" : : "r"(borrow) : ); // work-around to keep borrow alive ... Another example of weirdness is that the code below works great without optimizations, but with -O3 it seg-faults: ulong carry = 0,hi = 0,qh = s.data[1],ql = s.data[0]; asm("movq 0(%[b]),%%rax;" "mulq %[ql];" "movq %%rax,0(%[sb]);" "movq %%rdx,%[hi];" : [hi]"=r"(hi) : [ql]"r"(ql),[b]"r"(b.data),[sb]"r"(sb.data) : "%rax","%rdx","memory"); for (long i = 1; i < b.size; i++) { asm("movq 0(%[b],%[i],8),%%rax;" "mulq %[ql];" "xorq %%r10,%%r10;" "addq %%rax,%[hi];" "adcq %%rdx,%[carry];" "adcq $0,%%r10;" "movq -8(%[b],%[i],8),%%rax;" "mulq %[qh];" "addq %%rax,%[hi];" "adcq %%rdx,%[carry];" "adcq $0,%%r10;" "movq %[hi],0(%[sb],%[i],8);" "movq %[carry],%[hi];" "movq %%r10,%[carry];" : [carry]"+r"(carry),[hi]"+r"(hi) : [i]"r"(i),[ql]"r"(ql),[qh]"r"(qh),[b]"r"(b.data),[sb]"r"(sb.data) : "%rax","%rdx","%r10","memory"); } asm("movq -8(%[b],%[i],8),%%rax;" "mulq %[qh];" "addq %%rax,%[hi];" "adcq %%rdx,%[carry];" "movq %[hi],0(%[sb],%[i],8);" "movq %[carry],8(%[sb],%[i],8);" : [hi]"+r"(hi),[carry]"+r"(carry) : [i]"r"(long(b.size)),[qh]"r"(qh),[b]"r"(b.data),[sb]"r"(sb.data) : "%rax","%rdx","memory"); I think it has to do with the fact that it's using so many registers. Is there something I'm missing here or is the register allocation just really buggy with gcc inline assembly?

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  • How do I use an Entity Framework 4 model without a real database?

    - by Ivan
    I don't need any data to be stored. I'd like an application to start, create an Entity Framework entities container based on the model I've designed but having no data records in it, then generate some data (from user input and other input sources), work with it and discard all the data on close, without propagating any data operations made with EF contect to a real database hosted on server or in a file. How do I implement such a pattern? I use Entity Framework 4 and Visual Studio 2010.

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  • NDepend Evaluation: Part 3

    - by Anthony Trudeau
    NDepend is a Visual Studio add-in designed for intense code analysis with the goal of high code quality. NDepend uses a number of metrics and aggregates the data in pleasing static and active visual reports. My evaluation of NDepend will be broken up into several different parts. In the first part of the evaluation I looked at installing the add-in.  And in the last part I went over my first impressions including an overview of the features.  In this installment I provide a little more detail on a few of the features that I really like. Dependency Matrix The dependency matrix is one of the rich visual components provided with NDepend.  At a glance it lets you know where you have coupling problems including cycles.  It does this with number indicating the weight of the dependency and a color-coding that indicates the nature of the dependency. Green and blue cells are direct dependencies (with the difference being whether the relationship is from row-to-column or column-to-row).  Black cells are the ones that you really want to know about.  These indicate that you have a cycle.  That is, type A refers to type B and type B also refers to Type A. But, that’s not the end of the story.  A handy pop-up appears when you hover over the cell in question.  It explains the color, the dependency, and provides several interesting links that will teach you more than you want to know about the dependency. You can double-click the problem cells to explode the dependency.  That will show the dependencies on a method-by-method basis allowing you to more easily target and fix the problem.  When you’re done you can click the back button on the toolbar. Dependency Graph The dependency graph is another component provided.  It’s complementary to the dependency matrix, but it isn’t as easy to identify dependency issues using the window. On a positive note, it does provide more information than the matrix. My biggest issue with the dependency graph is determining what is shown.  This was not readily obvious.  I ended up using the navigation buttons to get an acceptable view.  I would have liked to choose what I see. Once you see the types you want you can get a decent idea of coupling strength based on the width of the dependency lines.  Double-arrowed lines are problematic and are shown in red.  The size of the boxes will be related to the metric being displayed.  This is controlled using the Box Size drop-down in the toolbar.  Personally, I don’t find the size of the box to be helpful, so I change it to Constant Font. One nice thing about the display is that you can see the entire path of dependencies when you hover over a type.  This is done by color-coding the dependencies and dependants.  It would be nice if selecting the box for the type would lock the highlighting in place. I did find a perhaps unintended work-around to the color-coding.  You can lock the color-coding in by hovering over the type, right-clicking, and then clicking on the canvas area to clear the pop-up menu.  You can then do whatever with it including saving it to an image file with the color-coding. CQL NDepend uses a code query language (CQL) to work with your code just like it was a database.  CQL cannot be confused with the robustness of T-SQL or even LINQ, but it represents an impressive attempt at providing an expressive way to enumerate and interrogate your code. There are two main windows you’ll use when working with CQL.  The CQL Query Explorer allows you to define what queries (rules) are run as part of a report – I immediately unselected rules that I don’t want in my results.  The CQL Query Edit window is where you can view or author your own rules.  The explorer window is pretty self-explanatory, so I won’t mention it further other than to say that any queries you author will appear in the custom group. Authoring your own queries is really hard to screw-up.  The Intellisense-like pop-ups tell you what you can do while making composition easy.  I was able to create a query within two minutes of playing with the editor.  My query warns if any types that are interfaces don’t start with an “I”. WARN IF Count > 0 IN SELECT TYPES WHERE IsInterface AND !NameLike “I” The results from the CQL Query Edit window are immediate. That fact makes it useful for ad hoc querying.  It’s worth mentioning two things that could make the experience smoother.  First, out of habit from using Visual Studio I expect to be able to scroll and press Tab to select an item in the list (like Intellisense).  You have to press Enter when you scroll to the item you want.  Second, the commands are case-sensitive.  I don’t see a really good reason to enforce that. CQL has a lot of potential not just in enforcing code quality, but also enforcing architectural constraints that your enterprise has defined. Up Next My next update will be the final part of the evaluation.  I will summarize my experience and provide my conclusions on the NDepend add-in. ** View Part 1 of the Evaluation ** ** View Part 2 of the Evaluation ** Disclaimer: Patrick Smacchia contacted me about reviewing NDepend. I received a free license in return for sharing my experiences and talking about the capabilities of the add-in on this site. There is no expectation of a positive review elicited from the author of NDepend.

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  • Where in memory are stored nullable types?

    - by Ondrej Slinták
    This is maybe a follow up to question about nullable types. Where exactly are nullable value types (int?...) stored in memory? First I thought it's clear enough, as Nullable<T> is struct and those are value types. Then I found Jon Skeet's article "Memory in .NET", which says: Note that a value type variable can never have a value of null - it wouldn't make any sense, as null is a reference type concept, meaning "the value of this reference type variable isn't a reference to any object at all". I am little bit confused after reading this statement. So let's say I have int? a = null;. As int is normally a value type, is it stored somehow inside struct Nullable<T> in stack (I used "normally" because I don't know what happens with value type when it becomes nullable)? Or anything else happens here - perhaps in heap?

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  • Oracle Partner Architects Training

    - by mseika
    Dear Oracle Partner, There is a lot more to Oracle technology than meets the eye. Sure, you already belong to a small circle of our most experienced and committed partners. But are you making the best use possible of our technology solutions? Put it to the test.  Join the “Oracle Partner Architects Training”. It is aimed at providing your experts, architects and consultants with in-depth architectural knowledge about Oracle technology. Here is your chance to learn from the best. Seasoned speakers, exclusive content and no product marketing. Oracle technology beyond the obvious. Choose from any of the 40 recorded training sessions. Topics include:  • Security• Service integration • Database and options• Data integration • BI and applications• Applications and infrastructure• Hardware and software combinations The market and Oracle value specialized partners More information about specialization can be found on opn.oracle.com. Click through to OPN Program/Specialize “What’s in it for us?” Quite simply: the opportunity to gain the differentiation and competitive edge you need to stand out in the marketplace. • Differentiate your company through expertise in leading Oracle IT solutions;• Get your experts, architects and consultants up to speed on specialized services and solutions;• Make our customers’ shortlists. They are looking for value-added solutions for their business.   Recordings All sessions are recorded. After registering for a session in oraevents, you will receive the info to access the webex recording. Your timing, your tempo.  Registration and more information Visit architects.oraevents.eu to sign up for the recorded sessions. NOTE: Looking to get your consultants Oracle certified? One more reason to join the Oracle Partner Architects Training. It is the fast track to getting their expertise validated with an Oracle certificate. Training schedule  Choose from any of the 40 recorded training sessions: SECURITY THE PRACTICAL APPROACH •  Identity governance• Access management• Data privacy and protection• End-to-end security, layers of exposures•  Identity & access management, why and where to start?• Data security, how? SERVICE INTEGRATION A NEW ROADTO ENTERPRISE-WIDE SERVICE INTEGRATION • Oracle RUEI: maximize business value by insight into real end-user experiences•  Governance challenges in the services landscape•  Creating an agile enterprise (by Jeff Davies)• Oracle’s approach to SOA (by Jeff Davies) - guiding and accelerating SOA success• Technical case study – the SOA challenge• Oracle’s unified business process management suite 11g (incl. demo) DATABASE DATABASE AND OPTIONS, GOINGWIDE •  Understanding service level agreements for databases• Database lifecycle management• Data centric information lifecycle management DATA INTEGRATION  DIS FOR ARCHITECTS • Data integration solutions: an overview• ODI and goldengate• Data quality

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  • Upgrading website from VS2005(2.0 Framework) to VS2008(2.0 Framework)

    - by Sravan
    We have a website that is created in VS2005 Recently we upgraded the website to VS2008 with 2.0 framework. While compiling the website Compilation errors are occuring i.e Licenses.licx file is not compiling, if it compile than it will reproduces an AppLicenses.dll. In the licensing.licx file containing one class and a namespace(i.e. OSADirectLicensing.OSADirectLicensedClass, OSADirectLicensing). The compilation error is as follows: Error 1 C:\Program Files\Sharp\Sharp Developer Tools\OSA SDK\Samples\DirectOSA\ExternalAuthority\licenses.licx: Could not transform licenses file into a binary resource. (1) : error LC0004 : Exception occurred creating type 'OSADirectLicensing.OSADirectLicensedClass, OSADirectLicensing, Version=1.0.4006.31768, Culture=neutral, PublicKeyToken=null System.ComponentModel.LicenseException: Invalid License at System.ComponentModel.LicenseManager.CreateWithContext(Type type, LicenseContext creationContext, Object[] args) at System.ComponentModel.LicenseManager.CreateWithContext(Type type, LicenseContext creationContext) at System.Tools.LicenseCompiler.GenerateLicenses(String fileContents, String targetPE, ITypeResolutionService resolver, DesigntimeLicenseContext ctx)' . Does VS2008 support licenses.licx or not? We should not remove this file from website. How can we solve this issue?

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  • difference between AJAX POST and GET

    - by Mohit Kumar
    $.ajax({ type: 'POST', url: path, data: '{AreaID: ' + parentDropdownList.val() + '}', contentType: 'application/json; charset=utf-8', dataType: 'json', success: function(response) { } }); In above code I am using type: 'POST'. My senior told me that I also can use 'GET' in type. But dint find the difference between 'POST' and 'GET' and I also want to know what is the use of type, contentType, and dataType. Could anyone one explain me why we use these type, contentType and dataType. Thanks in advance.

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  • Combining regroup with get_foo_display in Django templates

    - by shacker
    I'm using the regroup template tag to group queryset output on a Choices field. In the model: RESOURCE_TYPES = ( ('tut','External tutorial'), ('read','Additional reading'), ('org','Company or organization'), ) restype = models.CharField('Resource type',max_length=6,choices=RESOURCE_TYPES) in the view: resources = Resource.objects.filter(tutorial=tutorial) in the template: {% regroup resources by restype as resource_list %} {% for type in resource_list %} <h3>{{type.grouper}}</h3> So type.grouper renders as 'tut' or 'org' on the page, rather than the long form. Normally you would use the get_foo_display syntax to get at the value of the choice, rather than the key. But the value doesn't seem to be available after going through regroup. There's no way I can find to use get_foo_display on {{type.grouper}}. It makes sense when you think about it, but what's the workaround? Thanks.

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  • How can I login in a website with Pyhon?

    - by Shady
    How can I do it? I was trying to enter some specified link (with urllib), but to do it, I need to log. I have this source from the site <form id="login-form" action="auth/login" method="post"> <div> <!--label for="rememberme">Remember me</label><input type="checkbox" class="remember" checked="checked" name="remember me" /--> <label for="email" id="email-label" class="no-js">Email</label> <input id="email-email" type="text" name="handle" value="" autocomplete="off" /> <label for="combination" id="combo-label" class="no-js">Combination</label> <input id="password-clear" type="text" value="Combination" autocomplete="off" /> <input id="password-password" type="password" name="password" value="" autocomplete="off" /> <input id="sumbitLogin" class="signin" type="submit" value="Sign In" /> It's possible?

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  • php forms insert and update

    - by DAFFODIL
    I have a form.The user enter the data ,the data will be stored in the data base. Now,using phpmysql,i need to display the whole data present in db to front end.The user will click a particular thing and make some modifications and if,he press update the data should get into database. Give me a snippet http://dpaste.com/hold/178740/

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  • python return class

    - by William P
    Hi I new to python and I read from someone else of the example code below: class A: def current(self): data = Data(a=a,b=b,c=c) return data class B(A): #something here #print data a b c How do I print out the data a, b, and c?

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  • Ways to improve Java Generics and dont say get rid of wildcards and reification.

    - by mP
    Sometimes i like to write up template classes and use type parameters to make the abstract methods more type safe. Template<X> { abstract void doStuff( X ); // NOT public } While type safety is great etc, the problem remains that even though X is not visible to outside code, one must still include the type to avoid warnings. My solution in this case would be to make it possible to define a scope for type parameters (now they are always public). Would other original features besides the obvious would you like.

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  • Why is one Func valid and the other (almost identical) not.

    - by runrunraygun
    private static Dictionary<Type, Func<string, object>> _parseActions = new Dictionary<Type, Func<string, object>> { { typeof(bool), value => {Convert.ToBoolean(value) ;}} }; The above gives an error Error 14 Not all code paths return a value in lambda expression of type 'System.Func<string,object>' However this below is ok. private static Dictionary<Type, Func<string, object>> _parseActions = new Dictionary<Type, Func<string, object>> { { typeof(bool), value => Convert.ToBoolean(value) } }; I don't understand the difference between the two. I thought the extra braces in example1 are to allow us to use multiple lines in the anon function so why have they affected the meaning of the code?

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