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  • How to get a random item from the tree given a parent node?

    - by Bryan
    I have a scenario where I would like to randomize the display of some items. Given a Parent item, how can I randomly select one of its child items? Of course I could load ALL the children and apply some random index or whatnot... but that would be wildly inefficient. I'm wondering if this is also inefficient: Parent.Children[random(Parent.Children.Count)]? At what point do the items get loaded when you access Parent.Children?

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  • SQL clone record with a unique index

    - by Milhous
    Is there a clean way of cloning a record in SQL that has an index(auto increment). I want to clone all the fields except the index. I currently have to enumerate every field, and use that in an insert select, and I would rather not explicitly list all of the fields, as they may change over time.

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  • Tooltip steals mouse click

    - by deerchao
    I'm writing a custom TreeView from ScrollableControl. I decided to show tooltips when the mouse hovers over nodes with text too long to display. I find that when tooltips are shown, the user is not able to click the node to select it because (I think) he's clicking the tooltip window, not my control. Is there any easy solutions? As far I can see, System.Windows.Forms.TreeView don't have this problem. Thanks!

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  • Determine Last Modification Datetime for an Azure Table

    - by embeddedprogrammer
    I am developing an application which may be hosted on a microsoft sql server, or on Azure SQL, depending upon the end user's wishes. My whole system works fine with the exception of some WCF functions which determine the last modification time of tables using the following technique: SELECT OBJECT_NAME(OBJECT_ID) as tableName, last_user_update as lastUpdate FROM mydb.sys.dm_db_index_usage_stats This query fails in Azure. Is there any analogous way to get table last modification dates from Azure's sql?

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  • SQL, combining the result

    - by Newbie
    I am using Access and have this SQL SELECT land.id, land.official_name, vaksiner.vaksiner FROM land INNER JOIN (vaksiner INNER JOIN land_sykdom ON vaksiner.id = land_sykdom.sykdom) ON land.kort = land_sykdom.land ORDER BY land.official_name The SQL gives me a result like this: id official_name vaksiner 1 a A 1 a C 2 b A 2 b B 2 b C But I want to combine the result so that it looks like this: id official_name vaksiner 1 a A, C 2 b A, B, C

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  • Error using iif in ms access query

    - by naveen
    I am trying to fire this query in MS Access SELECT file_number, IIF(invoice_type='Spent on Coding',SUM(CINT(invoice_amount)), 0) as CodingExpense FROM invoice GROUP BY file_number I am getting this error Error in list of function arguments: '=' not recognized. Unable to parse query text. I tried replacing IIF with SWITCH to no avail. What's wrong with my query and how to correct this?

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  • Odd SQL behavior, I'm wondering why this works the way it does.

    - by Matthew Vines
    Consider the following Transact sql. DECLARE @table TABLE(val VARCHAR(255) NULL) INSERT INTO @table (val) VALUES('a') INSERT INTO @table (val) VALUES('b') INSERT INTO @table (val) VALUES('c') INSERT INTO @table (val) VALUES('d') INSERT INTO @table (val) VALUES(NULL) select val from @table where val not in ('a') I would expect this to return b, c, d, NULL but instead it returns b, c, d Why is this the case? Is NULL not evaluated? Is NULL somehow in the set 'a'?

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  • Powershell interact with open Excel

    - by HKK
    To interact with excel in Powershell it is common to start a new excel as follows: $x = New-Object -comobject Excel.Application Instead of that I have an open Excel process already. (I get it as follows) $excelprocess = Get-Process | Where-Object {$_.name -eq "excel"} | Sort-Object -Property "Starttime" -descending | Select-Object -First 1 Is there a way to interact with this specific excel process over PS?

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  • VB.Net Linq Datatable Exists

    - by LarsH
    I would like to use Linq instead of below function : Friend Function IsCollectionInTable2(ByVal apps As DataTable, ByVal collectionId As String) As Boolean For Each row As DataRow In apps.Rows If row("CollectionId").ToString = collectionId Then Return True Next Return False End Function The best I can do is below: Friend Function IsCollectionInTable(ByVal apps As DataTable, ByVal collectionId As String) As Boolean Return (From row In apps.AsEnumerable() Where (row.Field(Of String)("CollectionId") = collectionId) Select row.Field(Of String)("CollectionId")).Count > 0 End Function I would like to use Exists or Any in above function. Performance could be an issue,

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  • apply $expand to service operation

    - by Thurein
    Hi, I have a service operation in my dataservice, which returns a list of objects. Is it possible to apply $expand to the result. [WebGet] public IQueryable<contact> GetFilterByContactDetailCount(String city) { var result = from c in CurrentDataSource.Contacts join ca in CurrentDataSource.ContactAddresses on c.ContactID equals ca.ContactID join a in CurrentDataSource.Addresses on ca.AddressID equals a.AddressID where (String.IsNullOrEmpty(city) || a.City.Contains(city))) select c; return result.AsQueryable<Contact>(); } Thanks Thurein

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  • NHibernate - Saving simple parent-child relationship generates unnecessary selects with assigned id

    - by Alice
    Entities: public class Parent { virtual public long Id { get; set; } virtual public string Description { get; set; } virtual public ICollection<Child> Children { get; set; } } public class Child { virtual public long Id { get; set; } virtual public string Description { get; set; } virtual public Parent Parent { get; set; } } Mappings: public class ParentMap : ClassMap<Parent> { public ParentMap() { Id(x => x.Id).GeneratedBy.Assigned(); Map(x => x.Description); HasMany(x => x.Children) .AsSet() .Inverse() .Cascade.AllDeleteOrphan(); } } public class ChildMap : ClassMap<Child> { public ChildMap() { Id(x => x.Id).GeneratedBy.Assigned(); Map(x => x.Description); References(x => x.Parent) .Not.Nullable() .Cascade.All(); } } and using (var session = sessionFactory.OpenSession()) using (var transaction = session.BeginTransaction()) { var parent = new Parent { Id = 1 }; parent.Children = new HashSet<Child>(); var child1 = new Child { Id = 2, Parent = parent }; var child2 = new Child { Id = 3, Parent = parent }; parent.Children.Add(child1); parent.Children.Add(child2); session.Save(parent); transaction.Commit(); } this codes generates following sql NHibernate: SELECT child_.Id, child_.Description as Descript2_0_, child_.Parent_id as Parent3_0_ FROM [Child] child_ WHERE child_.Id=@p0;@p0 = 2 [Type: Int64 (0)] NHibernate: SELECT child_.Id, child_.Description as Descript2_0_, child_.Parent_id as Parent3_0_ FROM [Child] child_ WHERE child_.Id=@p0;@p0 = 3 [Type: Int64 (0)] NHibernate: INSERT INTO [Parent] (Description, Id) VALUES (@p0, @p1);@p0 = NULL[Type: String (4000)], @p1 = 1 [Type: Int64 (0)] NHibernate: INSERT INTO [Child] (Description, Parent_id, Id) VALUES (@p0, @p1, @p2);@p0 = NULL [Type: String (4000)], @p1 = 1 [Type: Int64 (0)], @p2 = 2 [Type:Int64 (0)] NHibernate: INSERT INTO [Child] (Description, Parent_id, Id) VALUES (@p0, @p1, @p2);@p0 = NULL [Type: String (4000)], @p1 = 1 [Type: Int64 (0)], @p2 = 3 [Type:Int64 (0)] Why are these two selects generated and how can I remove it?

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  • Faster way to know the tolal number of rows in Mysql Database?

    - by Starx
    If I need to know the total number of rows in a table of database I do something like $query = "SELECT * FROM tablename WHERE link='1';"; $result = mysql_query($query); $rows = mysql_fetch_array($result); $count = count($rows); So you see the total number of data is recovered scanning through entire database Is there a better way

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  • Treeview nodes won't highlight using PopulateOndemand

    - by DrybLrac
    Hi everyone, I have a treeview and I want to highlight (change the text color) of a node in the treeview once that node has been selected. This isnt working for me for some reason. when I select a node nothing happens, but when I click the plus on the same node I just selected...it highlights...and even then when I click any of the childnodes, nothing happens and the root node stays highlighted always. Can anyone point me in the right direction...I'm using c#.

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  • MySQLdb rowcount Returns Nothing

    - by Alec K.
    I am trying to log into my table called acounts using MySQLdb in Python, but it does not work for me. I keep getting my message "Not Logged In". Here is my code: database = MySQLdb.connect("127.0.0.1", "root", "pswd", "Kazzah") cursor = database.cursor() cursor.execute("SELECT * FROM Accounts WHERE Email=%s AND Password=%s", (_Email, _Password)) database.commit() numrows = cursor.rowcount if numrows == 1: msg = "Logged In" else: msg = "Not Logged In" cursor.close() database.close() What am I doing wrong? Thanks.

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  • can this simple SQL query be optimized?

    - by ibiza
    Hi, I have the following query : SELECT COUNT(*) FROM Address adr INNER JOIN Auditable a on adr.UniqueId = a.UniqueId on a big DB (1.3M adresses, 4M+ auditables) both UniqueId columns are clustered primary keys the query is taking quite long to complete...I feel dumb, but is there any way to optimize it? I want to count all the address entries that have an underlying auditable... thanks!

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  • How to apply styles to the whole silverlight pplication?

    - by Subhen
    Hi I have created two different grid background and radio button style in my App.xaml. User can select any style to change the look of the page i.e: Changing the background and style of the radiobutton. Now When I click on the raduio button the application navigates to another page and the style disappears. Is there a way to Set the style in application level or I need to store the styleVar as Global Var and check on the second page load and then apply the styles as per the styleVar.

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  • Nokogiri find text in paragraphs

    - by astropanic
    I want to replace the inner_text in all paragraphs in my XHTML document. I know I can get all text with Nokogiri like this doc.xpath("//text()") But I want only operate on text in paragraphs, how I can select all text in paragraphs without affecting eventually existent anchor texts in links ? #For example : <p>some text <a href="/">This should not be changed</a> another one</a>

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  • more radio problems * sighs * been at this for one week now

    - by jeansymolanza
    hi guys really i don't know what im doing wrong... i am trying to process multiple radios with mysql. the first step has involved me echoing the results on the process page. each time i select any radio option it simply displays the first row result. this is that i see after trying to submit the form: Notifications Thank you. The notifications have been updated successfully. statusid: 14 notc2: 1 Return this is the code for the form: <div style="padding: 15px;"> <span class="loginfail" style="font-size:24px; font-weight: bold">Notifications</span><p> <?php include("progress_insertcomment.php"); ?> <?php // Make a MySQL Connection mysql_select_db("speedycm_data") or die(mysql_error()); $query_comment = "select * from tbl_alert order by id desc limit 1"; $comment = mysql_query($query_comment, $speedycms) or die(mysql_error()); $row_comment = mysql_fetch_assoc($comment); $totalRows_comment = mysql_num_rows($comment); ?> <!--- add notification ---> <form method="post" action="<?php echo $_SERVER['PHP_SELF']; ?>"> <span id="sprytextarea1"> <textarea id='comment' name="comment" style="height: 75px; width:330px;"><?php echo $row_comment['comment']; ?></textarea> </span> <p> <button type="submit">Add</button> <input type="hidden" name="notc" value="1"/> </form> <!--- notification history ---> <form method="post" action="<?php echo $_SERVER['PHP_SELF']; ?>"> <table border="0" cellspacing="2" cellpadding="2"> <?php if ( $row_comment == 0 ) { echo "<span style='font-size: 11px;'>No current alerts.</span>"; } else { // Get all the data from the "example" table $result = mysql_query("SELECT * FROM tbl_alert ORDER BY id DESC") or die(mysql_error()); while($rows=mysql_fetch_array($result)){ ?> <tr> <td> <?php echo "<div class='bubble'><div class='pimped'> <blockquote>" . $rows['comment'] . " </blockquote></div> <cite><strong>" . $rows['user'] . "</strong> @ " . $rows['date'] . "</cite> <span style='font-size: 10px;'> <p> <a href='editalert.php?id=". $rows['id'] ."' class='form' >Edit</a>&nbsp;&#8226;&nbsp;<a href='deletealert.php?id=". $rows['id'] ."' class='form'>Delete</a> </span> </div> "; ?> </td> <td valign="top" align="center"><div style="padding-left: 30px;"><span style="font-size: 10px;">Completed?</span> <p class="field switch"> <!--- determine status of notification ---> <?php $status = $rows['status']; $id = $rows['id']; ?> <input type="radio" name="selstatus[<?php echo $id; ?>]" value="no" <?php if($status == 'yes') {echo 'checked';} else {echo '';} ?>/> <input type="radio" name="selstatus[<?php echo $id; ?>]" value="yes" <?php if($status == 'yes') {echo 'checked';} else {echo '';} ?>/> <input type="hidden" name="statusid" value="<?php echo $id; ?>"/> <label for="radio1" class="cb-enable <?php if($status == 'yes') {echo 'selected';} else {echo '';} ?>"><span>Yes</span></label> <label for="radio2" class="cb-disable <?php if($status == 'no') {echo 'selected';} else {echo '';} ?>"><span>No</span></label> </p> </div></td> </tr> <tr> <td></td> <?php } } ?> <td align="center"><div style="padding-left: 30px;"> <button type="submit">Update</button> <input type="hidden" name="notc2" value="1"/> </div></td> </tr> </table> </form> </div> this is the code for the processing page: <?php // 6) update notifications if (array_key_exists('notc2',$_POST)) { $update = $_POST['selstatus']; echo "<p style='font-size: 12px;'>Thank you. The notifications have been updated successfully.<p>"; foreach($_POST as $key => $value){ echo $key . ': ' . $value . '<br>'; } echo "<p><span style='font-size: 12px;'> <a onClick=\"history.go(-1)\" class='form'>Return</a></p> <p></span> "; exit; }; ?> how do i resolve this problem? please any help would be appreciated. i would like to display the id and value of the selected checkbox on the processing page before inserting it into the table. thanking you in advance. GOD BLESS

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  • Versant OQL Statement with an Arithmetic operator

    - by Pascal
    I'm working on a c# project that use a Versant Object Database back end and I'm trying to build a query that contains an arithmetic operator. The documentation states that it is supported but lack any example. I'm trying to build something like this: SELECT * FROM _orderItemObject WHERE _qtyOrdered - _qtySent > 0 If I try this statement in the Object Inspector I get a synthax error near the '-'. Anyone has an example of a working VQL with that kind of statement? Thanks

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  • SQL: How to order values inside group by

    - by Denis Yaremov
    Consider the following MS SQL Server table: ID | X | Y ------+-------+------- 1 | 1 | 1 2 | 1 | 2 3 | 1 | 3 4 | 2 | 40 5 | 2 | 500 6 | 3 | 1 7 | 3 | 100 8 | 3 | 10 I need to select the ID of the row that has the maximum value of Y grouped by x, i.e: ID | X | Y ------+-------+------- 3 | 1 | 3 5 | 2 | 500 7 | 3 | 100 The query will be nested several times so an optimal performance solution is required... Thank you!

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  • LINQ version of SQL's LIKE statement

    - by Erwin
    Hi fellow coders I'm new at LINQ, searching the net for LINQ samples that mimic SQL's LIKE statement doesn't satisfy myself. What I want is producing the same query result as this SQL SELECT * FROM table_1 WHERE column_1 LIKE '__0%' I want to query from table_1 where column_1's third character is '0' Is there equivalent statement in LINQ :D thank you

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