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  • Error when using TransformToAncestor: "The specified Visual is not an ancestor of this Visual."

    - by Brian Sullivan
    I'm trying to get the offset of a control relative to the top of its window, but I'm running into trouble when using the TransformToAncestor method of the control. Note: this code is in a value converter which will convert from a control to its relative Y position in relation to the window. public object Convert(object value, Type targetType, object parameter, CultureInfo culture) { var ctrl = (Control) value; var win = Window.GetWindow(ctrl); var transform = ctrl.TransformToAncestor(win); // Exception thrown here. var pt = transform.Transform(new Point(0, 0)); return pt.Y; } The call to Window.GetWindow works just fine, and returns the correct window object inside which the control resides. Am I misunderstanding what WPF thinks of as an "ancestor"? I would think that given the result of GetWindow, that window would be an ancestor of the control. Are there certain nesting patters that would cause the line of ancestry to be cut off at a certain point?

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  • Problems with Widgets in dojox DataGrid

    - by Kitson
    I am trying to include some editing Widgets in my dojox.grid.DataGrid seem to be having a lot of difficulty. I have tried everything I can think of to get it to work, but something just isn't going right. When I started having problems, I tried to copy almost exactly from the grid tests and model my "breakout" of code just like that, but without success. Basic editing of the Grid seems to work. In the example below, the "Events" column allows edits, but the two columns that are using the cellType attribute don't work. In fact they also seem to ignore the other attributes (like the styles) which would seem to indicate that some sort of issue was run into, but there is nothing in FireBug. Also I get the same behaviour between Chrome and Firefox. <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> <html> <head> <title>Insert title here</title> <link id="themeStyles" rel="stylesheet" href="javascript/dojotoolkit/dijit/themes/tundra/tundra.css"> <style type="text/css"> @import "css/gctilog.css"; @import "javascript/dojotoolkit/dojo/resources/dojo.css"; @import "javascript/dojotoolkit/dijit/themes/tundra/tundra.css"; @import "javascript/dojotoolkit/dojox/grid/resources/Grid.css"; @import "javascript/dojotoolkit/dojox/grid/resources/tundraGrid.css"; @import "javascript/dojotoolkit/ocp/resources/MultiStateCheckBox.css"; </style> <script type="text/javascript" src="javascript/dojotoolkit/dojo/dojo.js" djConfig="parseOnLoad:true, isDebug:true, locale:'en-gb'"></script> <script type="text/javascript"> dojo.require("dojo.currency"); dojo.require("dijit.dijit"); dojo.require("dijit.form.HorizontalSlider"); dojo.require("dojox.data.JsonRestStore"); dojo.require("dojox.grid.DataGrid"); dojo.require("dojox.layout.ExpandoPane"); dojo.require("dojox.timing"); dojo.require("ocp.MultiStateCheckBox"); dojo.require("dojo.parser"); formatCurrency = function(inDatum){ return isNaN(inDatum) ? '...' : dojo.currency.format(inDatum, this.constraint); } </script> <script type="text/javascript" src="javascript/formatter.js"></script> <script type="text/javascript" src="javascript/utilities.js"></script> </head> <body class="tundra"> <div name="labelCallids">Call IDs</div> <div dojoType="dojox.data.JsonRestStore" id="callidStore4" jsId="callidStore4" target="logmap/maps.php/maps/4/callids/" idAttribute="callid"></div> <table dojoType="dojox.grid.DataGrid" id="callidGrid4" store="callidStore4" query="{ callid: '*' }" style="width: 950px; border: 1px solid rgb(0,156,221); margin-left: 15px;" clientSort="false" autoHeight="10" noDataMessage="No Call IDs Available..."> <thead> <tr> <th field="callid" width="375px">Call ID</th> <th cellType="dojox.grid.cells.ComboBox" field="type" options="SIP,TLib" editable="true" width="10em" styles='text-align: center;'>Type</th> <th field="event_count" width="40px" editable="true" styles="text-align: right;">Events</th> <th field="start_ts" width="75px" formatter="secToHourMinSecMS">Start</th> <th field="end_ts" width="75px" formatter="secToHourMinSecMS">End</th> <th field="duration" width="75px" formatter="secToHourMinSecMS">Duration</th> <th cellType="dojox.grid.cells._Widget" widgetClass="dijit.form.HorizontalSlider" field="include" formatter="formatCurrency" constraint="{currency:'EUR'}" editable="true" width="10em" styles='text-align: right;'>Amount</th> </tr> </thead> </table> </body> </html> Is there anything that I am missing. It would seem to be fundamental, but I just can't seem to see it. [EDIT] What I have done instead is return a dijit Widget using the formatter to return a widget. So in the declarative model, I specify something like this: <th field="type" formatter="getMultiField" width="10em" styles='text-align: center;'>Type</th> And then I wrote a JavaScript function like the below to return the widget I wanted. function getMultiField(value) { var jsonValue = JSON.parse(value); //I provide the value of the widget as JSON //from my data store, so I need to parse it var control = new ocp.MultiStateCheckBox({ //my custom widget id : "dMSCB"+(new Date).getTime()+Math.ceil(Math.random()*100000), //generate a unique ID value : jsonValue.value, onChange : function (value {...}) //code to manipulate the underlying data store }); return control; //The dojo 1.4 grid can handle a returned Widget }

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  • DateTimePicker not updating dataset

    - by Dan
    I'm binding a DateTimePicker control to my dataset (which is linked to a database). However, unless the user changes the date on that control, the dataset seems to contain null for that entry (even though the Value entry of the control isn't null). I've done a bit of googling, and there's a lot of talk about people having troubles with the DateTimePicker not supporting null values. However, I DON'T want it to support a NULL value. The column in my database table is set to "NOT NULL". It's as if the dataset isn't updating itself from the DateTimePicker control unless the user changes the date. I've tried explicitly setting the date for the control in code (using DateTimePicker.Value = DateTime.Now). This still doesn't update the dataset side. Thankyou for any help, Dan.

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  • simple web parts in asp.net show as blank page

    - by Javaman59
    I am trying to develop web parts in VS 2008/WinXP I created a Web Site project, and added a couple of web parts within the default form in default.aspx <form id="form1" runat="server"> <div> <asp:WebPartManager ID="WebPartManager1" runat="server"> </asp:WebPartManager> <asp:WebPartZone ID="WebPartZone1" runat="server"> </asp:WebPartZone> </div> </form> When I first ran it (in the debugger), a popup told to me enable Windows authentication in IIS (so something is working!). I enabled the Windows authentication, and now when I run it I get a blank screen. Same result if I open it in IE via the url (rather than debugger). Following is the the source view. <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head><title> </title><style type="text/css"> .WebPartZone1_0 { border-color:Black;border-width:1px;border-style:Solid; } </style></head> <body> <form name="form1" method="post" action="Default.aspx" id="form1"> <div> <input type="hidden" name="__WPPS" id="__WPPS" value="s" /> <input type="hidden" name="__EVENTTARGET" id="__EVENTTARGET" value="" /> <input type="hidden" name="__EVENTARGUMENT" id="__EVENTARGUMENT" value="" /> <input type="hidden" name="__VIEWSTATE" id="__VIEWSTATE" value="/wEPDwULLTEzNTQyOTkwNDZkZEAVY0VcQaHLv3uaF3svWgCOfsmb" /> </div> <script type="text/javascript"> //<![CDATA[ var theForm = document.forms['form1']; if (!theForm) { theForm = document.form1; } function __doPostBack(eventTarget, eventArgument) { if (!theForm.onsubmit || (theForm.onsubmit() != false)) { theForm.__EVENTTARGET.value = eventTarget; theForm.__EVENTARGUMENT.value = eventArgument; theForm.submit(); } } //]]> </script> <script src="/WebPartsSite/WebResource.axd?d=4lwrtwXryJ3Ri-GXAxZR4g2&amp;t=634003643420884071" type="text/javascript"></script> <div> <table cellspacing="0" cellpadding="0" border="0" id="WebPartZone1"> <tr> <td style="height:100%;"><table cellspacing="0" cellpadding="2" border="0" style="width:100%;height:100%;"> <tr> <td style="height:100%;"></td> </tr> </table></td> </tr> </table> </div> <script type="text/javascript"> //<![CDATA[ var __wpmExportWarning='This Web Part Page has been personalized. As a result, one or more Web Part properties may contain confidential information. Make sure the properties contain information that is safe for others to read. After exporting this Web Part, view properties in the Web Part description file (.WebPart) by using a text editor such as Microsoft Notepad.';var __wpmCloseProviderWarning='You are about to close this Web Part. It is currently providing data to other Web Parts, and these connections will be deleted if this Web Part is closed. To close this Web Part, click OK. To keep this Web Part, click Cancel.';var __wpmDeleteWarning='You are about to permanently delete this Web Part. Are you sure you want to do this? To delete this Web Part, click OK. To keep this Web Part, click Cancel.';//]]> </script> <script type="text/javascript"> __wpm = new WebPartManager(); __wpm.overlayContainerElement = null; __wpm.personalizationScopeShared = true; var zoneElement; var zoneObject; zoneElement = document.getElementById('WebPartZone1'); if (zoneElement != null) { zoneObject = __wpm.AddZone(zoneElement, 'WebPartZone1', true, false, 'black'); } </script> </form> </body> </html>

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  • jQuery Select Menu Replacement

    - by Brad
    I have a select drop-down that selects a theme for the current page the user is on: <select id="style" name="acct-stylenum"> <option value="1" selected="true">Light</option> <option value="2">Dark</option> </select> Now what I would like to do is add two divs that will also control this select menu. I would much rather have the user select between two images than a select menu. The divs are as follows: <div class="style-box light"></div> <div class="style-box dark"></div> I would like to use jQuery to make the select menu hidden but still use its input. Also I would like the divs to control the menus value and show a selected state. Please let me know the easiest way this can be done using jQuery or JavaScript. Thanks in advance. -B

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  • Add a Session Variable or Custom field to the Elmah Error Log table

    - by VJ
    I want to add my own session variable to elmah error log table and display it. I already have modified the source code and added the new fields to Error.cs and other fields but I don't know but when I assign an HttpContext.Current.Session["MyVar"].tostring() value to my field in the constructor it stops logging exceptions and does not log any exception. I just need to get the value of the session variable is there other way for this. I read a post which he added fields for the email but it does not say where exactly should I get the session value.

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  • ASP.NET Session does not timeout on using ReportViewer Control.

    - by Saurabh
    Hi, We are using the ReportViewer control to display SSRS reports in our ASP.NET application. On pages where we use the ReportViewer control the session does not time out. The reason for this is the ReportViewer control emits a "setTimeOut" javascript function which reads the Session timeout value from the web.config and pings the server 1 minute before the configured value and keeps the session alive. For example, if the session timeout value is 5 minutes, the ReportViewer pings the server on the 4th minute. We used fidldler to verify this behavior. In addition, if we remove the ReportViewer control from the page, the sessions times out as expected. We also tried using the ReportViewer control in a sample application and observed the same behaviour. Has anyone faced this issue? Regards, Saurabh

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  • Getting multiple checkboxes from FormCollection element

    - by FreshCode
    Given multiple HTML checkboxes: <input type="checkbox" name="catIDs" value="1" /> <input type="checkbox" name="catIDs" value="2" /> ... <input type="checkbox" name="catIDs" value="100" /> How do I retrive an array of integers from a FormCollection in an action: public ActionResult Edit(FormCollection form) { int [] catIDs = (IEnumerable<int>)form["catIDs"]; // ??? // alternatively: foreach (int catID in form["catIDs"] as *SOME CAST*) { // ... } return View(); } Note: I read the related questions and I don't want to change my action parameters, eg. Edit(int [] catIDs).

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  • How to format float to 2 decimals in objective C

    - by iamdadude
    I have a string that I'm converting to a float that I want to check for values in an if statement. The original float value is the iPhone's trueHeading that is returned from the didUpdateHeading method. When I convert the original float to a string using @"%.2f" it works perfectly, but what I'm trying to do is convert the original float number to the same value. IF I just convert the string to [string floatValue] I get the same original float number, and I don't want that. To make it short and simple, how do I take an existing float value and just get the first 2 decimals?

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  • yui datatable inline cell editor problem

    - by Eli
    Hi, When using inline cell editor in my datatable I want to round value to 10 multiple This is my code : mydatatable.subscribe("cellDblclickEvent",datatable_DetailsCommande.onEventShowCellEditor); var onCellEdit = function(oArgs) { var oColumn=oArgs.editor.getColumn(); var column=oColumn.getKey(); var oRecord = oArgs.editor.getRecord(); var newValue=oRecord.getData(column); var row = this.getRecord(oArgs.target); // calculate the modulo n = newValue % 10; if(n!=0) { newValue=parseInt(newValue); oRecord.setData(column,eval(newValue+(10-n))); } } mydatatable.subscribe("editorSaveEvent", onCellEdit); Function result : After double clicking in cell I change value to 17 for example and I click save, I want then to have 20 in my datatable cell but I got 17. After second time double clicking in my datatable cell I obtain 20 in the inline cell editor. How to put the rounded value in my datatable cell? regards,

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  • How to setup custom subdomain with Posterous blog

    - by Tahir Akram
    Hi; I want to setup my custom subdomain with my posterous blog: tahirakram.posterous.com. I am confused over setting up A record and CNAME. Do I need to set A record and CNAME both to run my posterous to this URL: blog.tahirakram.com? So far I set up CNAME Name: blog.tahirakram.com Value: posterous.com Should I set A recrod name value too? (if yes, as following) Host Name: blog.tahirakram.com Destination IPv4 Address: 67.207.139.81 Instruction given by posterous

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  • HTML5 web storage: can different websites overwrite each other’s data on a user’s computer?

    - by Deepak Mahalingam
    I have a few questions regarding the concept of HTML5 storage. I went through the w3c specification, books and tutorials on the same, but still I am a bit unclear about certain concepts: Assume that I access Website A. Some JavaScript runs in my browser that sets a key value pair, say ('username','deepak'). Then I access Website B which also adds a key,value pair in the localstorage as ('username','mahalingam'). How will they both be differentiated? Will Website B override the value set by website A in my localstorage? How can we ensure that a website would not erase all of my localstorage?

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  • specify query timeout when using toplink essential query hint

    - by yhzs8
    Hi, For glassfish v2, I have searched through the web and I cannot find anyway to specify query timeout when using TopLink essential query hint. We have another option to migrate to EclipseLink but that is not feasible. have tried the solution in http://forums.oracle.com/forums/thread.jspa?threadID=974732&tstart=-1 but it seems the DatabaseQuery which one could set a timeout value is actually for Toplink, not TopLink essential. Do we have some other way to instruct the JDBC driver for this timeout value other than the query hint? I need to do it on query-basis and not system-basis (which is just to change the value of DISTRIBUTED_LOCK_TIMEOUT)

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  • Java JPA Hibernate Spring @EntityListeners throws org.springframework.dao.DataIntegrityViolationException

    - by user
    I am using Spring 3 with Hibernate 3. I would like to update the last modification date automatically when an entity is updated. Below is the sample code: HibernateConfig: @Configuration public class HibernateConfig { @Bean public DataSource dataSource() throws Exception { DriverManagerDataSource dataSource = new DriverManagerDataSource(); Properties properties = new Properties(); properties.load(ClassLoader.getSystemResourceAsStream(new String("hibernate.properties"))); dataSource.setUrl(properties.getProperty(new String("jdbc.url"))); dataSource.setUsername(properties.getProperty(new String("jdbc.username"))); dataSource.setPassword(properties.getProperty(new String("jdbc.password"))); dataSource.setDriverClassName(properties.getProperty(new String("jdbc.driverClassName"))); return dataSource; } @Bean public AnnotationSessionFactoryBean sessionFactory() throws Exception { AnnotationSessionFactoryBean sessionFactory = new AnnotationSessionFactoryBean(); Properties hibernateProperties = new Properties(); Properties properties = new Properties(); properties.load(ClassLoader.getSystemResourceAsStream(new String("hibernate.properties"))); // set the Hibernate Properties hibernateProperties.setProperty(new String("hibernate.dialect"), properties.getProperty(new String("hibernate.dialect"))); hibernateProperties.setProperty(new String("hibernate.show_sql"), properties.getProperty(new String("hibernate.show_sql"))); hibernateProperties.setProperty(new String("hibernate.hbm2ddl.auto"), properties.getProperty(new String("hibernate.hbm2ddl.auto"))); sessionFactory.setDataSource(dataSource()); sessionFactory.setHibernateProperties(hibernateProperties); sessionFactory.setAnnotatedClasses(new Class[]{Message.class}) return sessionFactory; } @Bean public HibernateTemplate hibernateTemplate() throws Exception { HibernateTemplate hibernateTemplate = new HibernateTemplate(); hibernateTemplate.setSessionFactory(sessionFactory().getObject()); return hibernateTemplate; } } DAOConfig: @Configuration public class DAOConfig { @Autowired private HibernateConfig hibernateConfig; @Bean public MessageDAO messageDAO() throws Exception { MessageDAO messageDAO = new MessageHibernateDAO(hibernateConfig.hibernateTemplate()); return messageDAO; } } Message: import java.util.Date; import javax.persistence.Column; import javax.persistence.Entity; import javax.persistence.EntityListeners; import javax.persistence.Table; import javax.persistence.Temporal; import javax.persistence.TemporalType; import java.io.Serializable; import javax.persistence.Column; import javax.persistence.GeneratedValue; import javax.persistence.GenerationType; import javax.persistence.Id; @Entity @Table @EntityListeners(value = MessageListener.class) public class Message implements Serializable { @Id @GeneratedValue(strategy = GenerationType.AUTO) @Column private int id; @Column(nullable = false) @Temporal(TemporalType.TIMESTAMP) private Date lastMod; public Message() { } public int getId() { return id; } public void setId(int id) { this.id = id; } public Date getLastMod() { return lastMod; } public void setLastMod(Date lastMod) { this.lastMod = lastMod; } } MessageListener: import java.util.Date; import javax.persistence.PrePersist; import javax.persistence.PreUpdate; import org.springframework.stereotype.Component; @Component public class MessageListener { @PrePersist @PreUpdate public void setLastMod(Message message) { message.setLastMod(new Date()); } } When running this the MessageListener is not being invoked. I use a DAO design pattern and when calling dao.update(Message) it throws the following Exception: org.springframework.dao.DataIntegrityViolationException: not-null property references a null or transient value: com.persistence.entities.MessageStatus.lastMod; nested exception is org.hibernate.PropertyValueException: not-null property references a null or transient value: com.persistence.entities.Message.lastMod at org.springframework.orm.hibernate3.SessionFactoryUtils.convertHibernateAccessException(SessionFactoryUtils.java:665) at org.springframework.orm.hibernate3.HibernateAccessor.convertHibernateAccessException(HibernateAccessor.java:412) at org.springframework.orm.hibernate3.HibernateTemplate.doExecute(HibernateTemplate.java:411) at org.springframework.orm.hibernate3.HibernateTemplate.executeWithNativeSession(HibernateTemplate.java:374) at org.springframework.orm.hibernate3.HibernateTemplate.save(HibernateTemplate.java:683) at com.persistence.dao.hibernate.GenericHibernateDAO.save(GenericHibernateDAO.java:38) Having looked at a number of websites there seems not to be a solution.

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  • How to get UIScrollView contentOffset during an animation

    - by user249488
    I am trying to get the contentOffset property of a UIScrollView in the middle of a setContentOffset animation. Note I am not using the animated property of the method, but instead enclosing the setContentOffset operation within a UIView animation block so I can have finer control. When I try to read the value of contentOffset in the middle of the animation, it returns the final value rather than the value at that moment. I know that you can use the presentationLayer to get the current layer, but is there any way you can get the current offset in the middle of an animation?

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  • How to configure a session timeout for Grails application?

    - by curd0
    In one of controllers in my Grails application I'm preserving a parameter value in a session variable like this: session.myVariable = params.myValue After that, I can access the saved value from different controllers/GSP-pages as long as I actively use the app. However, if I don't use my app for a while, even though my browser window is still open, the session variable looses it's value. Does this happens because the session expires? I was under impression that a session lives until the browser window is still open, but apparently I was wrong. What should I do to ensure all session variables I define in my Grails app don't expire until the browser is closed? Is there any way to set session timeout manually? Thank you in advance for your answers!

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  • Workflows for User Profile properties

    - by Nigel
    Hi Guys, I have a requirement from a client with regards to user profile properties. The requirement is as follows: We would like to setup custom user profile properties such that these values are editable by individuals via their my site. When a user edits this user profile property value, it should not be immediately visible to other users that happen to go to the individual's my site, but rather go through an approval workflow. If the value submitted is approved the user profile property value is updated. As far as I know this is not possible. I do have a work around for this but I want to ensure that I haven't missed anything before going down this path. Thanks in Advance

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  • javascript: how to make input selected

    - by Syom
    i have to use the following function, to change the input's type <input class="input" id="pas" type="text" name="password" style="color: #797272;" value= "<?php if ($_POST[password] != '') {echo '';} else {echo '????????';}?>" onclick="if (this.value =='????????') { this.value=''; this.style.color='black'; change(); }" /> <script type="text/javascript"> function change() { var input=document.getElementById('pas'); var input2= input.cloneNode(false); input2.type='password'; input.parentNode.replaceChild(input2,input); } </script> it works fine, but i have to reclick on input, because it creates a new input. so what can i do, if i want it to create a new input with cursor in it? thanks

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  • Codeigniter: How to build an edit form that uses form validation and re-population?

    - by Sergio
    Hi There, I have a simple form in codeigniter that I wish to use for the editing or records. I am at the stage where my form is displayed and the values entered into the corresponding input boxes. This is done by simply setting the values of said boxes to whatever they need to be in the view: <input type="text" value="<?php echo $article['short_desc'];?>" name="short_desc" /> But, if I wish to use form_validation in codeigniter then I have to add thos code to my mark-up: <input value="<?php echo set_value('short_desc')?>" type="text" name="short_desc" /> So not the value can be set with the set_value function should it need to be repopulated on error from the post data. Is there a way to combine the two so that my edit form can show the values to be edited but also re-populate? Thanks

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  • Relation between TCP/IP Keep Alive and HTTP Keep Alive timeout values

    - by Suresh Kumar
    I am trying to understand the relation between TCP/IP and HTTP timeout values. Are these two timeout values different or same? Most Web servers allow users to set the HTTP Keep Alive timeout value through some configuration. How is this value used by the Web servers? is this value just set on the underlying TCP/IP socket i.e is the HTTP Keep Alive timeout and TCP/IP Keep Alive Timeout same? or are they treated differently? My understanding is (maybe incorrect): The Web server uses the default timeout on the underlying TCP socket (i.e. indefinite) and creates Worker thread that counts down the specified HTTP timeout interval. When the Worker thread hits zero, it closes the connection.

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  • Null safe way to get values from an IDataReader

    - by kumar
    Hi all, (LocalVariable)ABC.string(Name)= (Idatareader)datareader.GetString(0); this name value is coming from database.. what happening here is if this name value is null while reading it's throwing an exception? I am manually doing some if condition here. I don't want to write a manual condition to check all my variables.. I am doing something like this now.. string abc = (Idatareader)datareader.GetValue(0); if(abc = null) //assiging null else assiging abc value is there something like can we write extension method for this? thanks

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  • WPF listbox : problem with selection

    - by KiTe
    Hello. In my XAML file, I have a ListBox declared like this : <ListBox x:Name="lstDeck" Height="280" ItemsSource="{Binding Path=Deck}" > <ListBox.ItemTemplate> <DataTemplate> <ListBoxItem Content="{Binding}" /> </DataTemplate> </ListBox.ItemTemplate> </ListBox> In my view model, Deck is an ObservableCollection, so that binding directly displays the content of my collection. But when I have several value that hold the same value (for example "10" six times), the selection in the ListBox has a weird behaviour : it select 2-3 elements instead of the only the one on which I clicked. Moreover, when I click to another listBoxItem, it doesn't unfocus the previous selected one. Then it is impossible to see which item is actually selected, and impossible to get the SelectedIndex value. Has someone an idea?

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  • Python Instance Variable as Default Parameter

    - by DuneBug
    Hello, I have am writing a Python function that takes a timeout value as a parameter. Normally, the user will always use the same timeout value, but on occasion he may want to wait slightly longer. The timeout value is stored as a class instance variable. I want to use the class' timeout instance variable as the default parameter. Currently, I am implementing this as follows: def _writeAndWait (self, string, timeout = -1): if (timeout == -1): timeout = self._timeout I was just wondering, is the proper way to use an instance variable as a default parameter? Or is there a better way that would avoid the "if" check? Thanks, Ryan

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  • WPF DataGridTextColumn Can't type point for float data

    - by Alvin
    I had a WPF DataGrid and use DataGridTextColumn Binding to a Collection. The items in Collection had some float property. When my program launched, I modify the value of float property in DataGrid, if I type a integer value, it works well. But if I type char . for a float value, char . can't be typed. I had to type all the numbers first, and then jump to the . position to type char . to finish my input. So how can I type . in my situation? Thanks.

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  • Test if a Property is not Null before Returning

    - by DaveDev
    I have the following property public MyType MyProperty {get;set;} I want to change this property so that if the value is null, it'll do populate the value first, and then return it... but without using a private member variable. For instance, if I was doing this: public MyType MyProperty { get { if (_myProperty != null) return _myProperty else _myProperty = XYZ; return _myProperty; } set { _myProperty = value; } } is this possible? Or do I need the member variable to get it done?

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