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  • Why does the 'as' keyword work while the () cast does not.

    - by Mausimo
    //always works, returning a valid object into _page _page = _httpContext.Handler as System.Web.UI.Page; //Fails throwing the exception : Unable to cast object of type 'System.Web.DefaultHttpHandler' to type 'System.Web.UI.Page' _page = (System.Web.UI.Page)_httpContext.Handler; I would like to know why this happens?

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  • selected index event is not working in dropdown

    - by prince23
    <asp:DropDownList ID="ddlTime" runat="server" CausesValidation="true" AutoPostBack="true" onselectedindexchanged="ddlTime_SelectedIndexChanged"> <asp:ListItem Selected Value = "True">--Select--</asp:ListItem> <asp:ListItem>8.50</asp:ListItem> <asp:ListItem>9.00</asp:ListItem> <asp:ListItem>9.50</asp:ListItem> </asp:DropDownList> I have drop down with the event changing . but when ever i select an value this event is not firing at all protected void ddlTime_SelectedIndexChanged(object sender, EventArgs e) { } What is the issue that is causing here any help would be great thank you

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  • Initializing a value through a Session variable

    - by William Calleja
    I need to Initialize a value in a Javascript by using a c# literal that makes reference to a Session Variable. I am using the following code <script type="text/javascript" language="javascript" > var myIndex = <%= !((Session["myIndex"]).Equals(null)||(Session["myIndex"]).Equals("")) ? Session["backgroundIndex"] : "1" %>; However the code above is giving me a classic Object reference not set to an instance of an object. error. Why? Shouldn't (Session["myIndex"]).Equals(null) capture this particular error?

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  • Get number of apps in TaskBar

    - by j-t-s
    Hi All I've been wondering how to do this for ages. I'm creating a little app, and I need to figure out how many apps or windows are displayed in the TaskBar. I've yet to find any info on this at all, I'd appreciate any help at all. Thank you :)

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  • Change url property of .sitemap

    - by user555209
    Hello I have multiple .sitemap xml defined with different providers. For one xml file, I want to change the url (append Customerid in the url) by taking the existing url in xml file. I want this to be changed when the page is loaded the first time. For eg one of my node is And I want to make it as I have read many articles online talking about changing node in memory but cant make it work. Any help would be appreciated. Not working with breadcrumbs or sitemapPath control.

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  • Imbedded wpf textbox does not accept input

    - by pro3carp3
    I put a wpf textbox inside a combobox to allow the user to enter a custom setting. I can read the keypress in the keydown event, but the text in the textbox does not change. What am I missing? <ComboBoxItem Name="GridSizeCustom"> <StackPanel Height="30" Orientation="Horizontal"> <TextBlock Text="Grid Size (8 - 200)" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="0" /> <TextBox Name="GridSizeBox" KeyDown="test" Width="50" /> </StackPanel> </ComboBoxItem> I step through this event handler when I press a key, but no change to the textbox text: public void test(Object sender, KeyboardEventArgs e) { int x = 0; } Any help is appreciated. Thanks.

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  • Updating the collections of entities with NHibernate the correct way

    - by karel_evzen
    A simple question regarding how NHibernate works: I have a parent entity that has a collection of other child entities. Those child entities have a reference to the parent entity they belong to. Now I want to implement an Add method to the parent entity that would add a child to it. Should that Add method only add the child to its new parents collection, or should it also update the parent reference of the child or should it also remove the added entity from its previous parents collection? Do I have to do all these things in that method or will NHibernate do something for me? Thanks.

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  • Substitute User Controls on Failure

    - by Brian
    Recently, I had a user control I was developing throw an exception. I know what caused the exception, but this issue got me thinking. If I have a user control throw an exception for whatever reason and I wish to replace that usercontrol with something else (e.g. an error saying, "Sorry, this part of the page broke.") and perhaps log the error, what would be a good way to do it that could be done independently of what the user control is or does (i.e. I'm not saying what the user control does/is, because I want an answer where that is irrelevant). Code sample: <asp:TableRow VerticalAlign="Top" HorizontalAlign="Left"> <asp:TableCell> <UR:MyUserControl ID="MyUserControl3" runat="server" FormatString="<%$ AppSettings:RVUC %>" ConnectionString="<%$ ConnectionStrings:WPDBC %>" Title="CO" /> </asp:TableCell> <asp:TableCell> <UR:MyUserControl ID="MyUserControl4" runat="server" FormatString="<%$ AppSettings:RVUA %>" ConnectionString="<%$ ConnectionStrings:WPDBA %>" Title="IEAO" /> </asp:TableCell> </asp:TableRow>

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  • A Form(?) appears briefly outside of Form1 when adding a control to it

    - by ispiro
    I have a program which creates new Controls (actually - Form's with TopLevel = false) and puts them on a Panel which is on Form1. For some reason, this is usually followed by what seems like a Form appearing very briefly outside of Form1. It's hard to tell exactly what's happening because it's so brief. Perhaps it's Form1 moving there (and changing its size) and then returning. Or perhaps it's the Form that's being put on Form1 that appears there (though how could that happen at all? It's out of Form1!). I couldn't find anything in the code that might cause it, and the whole code is way too long to post here. (The relevant code is simply: MyPanel.Controls.Add(newForm);.) Is there any known bug that might cause this?

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  • Anchors does not work

    - by serhio
    Situation: In A form I have a TableLayoutPanel(Dock= Fill) and a label (witch parent is the Form, not the tablelayoutPanel) whitch anchors are set to Top+Bottom+Left+Right. Now, when I run this form and rezise it, the label does not center itself in the Form, as I expected. Workarounds?

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  • How do I tell if the ObjectDataSource OnSelected event was called for the selectmethod or selectcou

    - by itchi
    I have an object datasource that looks like this: <asp:ObjectDataSource ID="obdsList" runat="server" EnablePaging="True" SelectCountMethod="GetCountByID" SortParameterName="sortExpression" OldValuesParameterFormatString="original_{0}" SelectMethod="GetByID" TypeName="Services.Users" onselected="obdsList_Selected"> <SelectParameters> <asp:QueryStringParameter Name="ID" QueryStringField="ID" Type="Int32" /> </SelectParameters> </asp:ObjectDataSource> And a onselected event like this: protected void obdsList_Selected(object sender, ObjectDataSourceStatusEventArgs e) { } However, the event method is being called twice.. once with my returned list, and once with the returned Int32 count. If I want to cast e.ReturnValue to the return List how do I differentiate between the count and select methods? I can do a e.ReturnValue.GetType().ToString() but that seems like a hack.

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  • Infinite loop when Select?!

    - by serhio
    I have a winform in witch I have a custom LongPanel with textboxes. In order to validate an eventually edited textbox when the user click somewhere out of textBoxY I use the following code: Private Sub LongPanel_MouseClick(ByVal sender As Object, ByVal e As MouseEventArgs) _ Handles MyBase.MouseClick _AttachedPanel.Select() End Sub In runtime application freezes at the "Select" line... I receive infinite panel Leave events... any idea why?

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  • [Raise|Trigger|Fire|...] an event?!?

    - by winSharp93
    Hello, in a German programming forum we currently have a discussion about events and what you (grammatically) do with them. The MSDN talks about "Event Raising" and "to raise an event". Thus, this seems to be one possibility. Are there any other synonyms? What about "to trigger an event" and "to fire an event"? A Google search will bring results for all of the three possibilities. This, however, does not mean that they are correct, too, of course. Are they? Are there any (stylistic, ...) differences or are they used in different contexts? Many thanks in advance for ending a heated debate :-)

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  • Problem using FormView to insert.

    - by matthew_360
    I have a formview control, and on the ItemCreated event, I am "priming" some of the fields with default values. However, when I try to use the formview to insert, before the ItemInserting event gets called, for some reason it calls ItemCreated first. That results in the fields being over-written with the default values right before the insert happens. How do I get it to not call the ItemCreated event before the ItemInserting event?

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  • Have a workaround for the 1,000 file limit in a directory on windows mobile 5?

    - by nateday76
    I need to download more than 1,000 files into a windows mobile 5 directory located on the storage card. If i copy the files onto the storage card via my desktop there is no problem. But when i try to download the files from the handheld device I get a disk full error, even though there is plenty of room due to the 1,000 file limit. Has anyone run into this and found a workaround? I'm going to try zipping all of the files then decompressing on the device but not sure that this will work.

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  • How to add a web service reference in a DLL

    - by dan
    I'm creating a DLL with a reference to web services (I don't have the choice to do so) but I have to add web service references to the project that uses the DLL for it to work. Example, I have the DLL called API.DLL that calls a web service called WebService.svc that I want to use in a project called WinForm. First, I have to add a "Service Reference" to WebService.svc in API.DLL. Then, I add a reference API.DLL to WinForm but it doesn't work unless I also add a service reference to WebService.svc in WinForm. What can I do to avoid that last step?

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  • Want to disable flash caching ?

    - by Mina Samy
    Hi all I have a .swf flash gallery that loads pics from a XML file the probelm is when I modify the XML the modifications do not reflect on the flash till I delete the browsing cache from the browser I tried to disable caching using code like this Response.Cache.SetCacheability(HttpCacheability.NoCache); Response.AddHeader("Pragma","no-cache"); Response.Expires = -1; but not working is there any workaround for this ? thanks

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  • Is it okay to violate the principle that collection properties should be readonly for performance?

    - by uriDium
    I used FxCop to analyze some code I had written. I had exposed a collection via a setter. I understand why this is not good. Changing the backing store when I don't expect it is a very bad idea. Here is my problem though. I retrieve a list of business objects from a Data Access Object. I then need to add that collection to another business class and I was doing it with the setter method. The reason I did this was that it is going to be faster to make an assignment than to insert hundreds of thousands of objects one at a time to the collection again via another addElement method. Is it okay to have a getter for a collection in some scenarios? I though of rather having a constructor which takes a collection? I thought maybe I could pass the object in to the Dao and let the Dao populate it directly? Are there any other better ideas?

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  • Forcing an app to run single core only?

    - by Kevin
    I have this strange issue with some third party DLL's. The third party provider references some open source DLL's that have a memory exception whenever I try to use a certain method. This issue does not appear when the app is run on a single core machine, but obviously we cannot assume a user will have that. Is there a way to force an app, or even better yet a referenced DLL to run on a single core? Any other way to possibly fix this? Getting the third party to rebuild the OS dll's is apparently out of the question (its a bit of a sore spot with me currently :) ) so I have to handle it myself or just forget about providing this functionality.

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