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• WPF Frame accessing parent page controls

  - by Mitch

  I have a WPF page that contains a Listbox and a frame. The frame has various pages loaded into it determined by the selection within the Listbox. Each page within the frame has a variety of different input boxes and has a Save Cancel button. When the Save button is clicked I need the content to be saved to the database and the Listbox in the parent page to be refreshed to reflect the new data. Saving the data is easy but how do I initiate a refresh on the contents of the Listbox in the parent page when calling it from the page that inside the frame? I need to somehow be able to access the parent pages controls to do this. Any ideas?

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• How do I prevent flickering on CListCtrl?

  - by Sorin Sbarnea

  I'm using a CListCtrl/CListView report view (LVS_REPORT) in virtual mode (LVS_OWNERDATA) with LVS_EX_DOUBLEBUFFER enabled and I encounter ugly flickering. Double buffer have a real effect but it doesn't stop all flickering (without it very slow). I'm not looking for switching to other controls that would require a high amount of rework (like ObjectListView) How does the flickering behaves: * on column resize - the background is first clean using lightgray and after this is displayed the text (background is white) * on mouse scroll (animated) - for a very short time there is lightgray-bar displayed in the area where new lines are to be displayed. It looks like it does clean the background using the default window background color (lightgray) for the area where it has to redraw. How do I solve the flickering problem?

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• how to dinamically add controls in asp.net Dynamic Data

  - by loviji

  Hello, i'm trying to work with asp.NET Dynamic Data. So, I see Dynamic Data not well learned by people as other technologies. now, to my question. Lets us work with Details.aspx page that located on ~\DynamicData\PageTemplates I need to add <asp:DynamicControl runat="server" to page into Form1.detailsTable. i've tried like this: protected DynamicControl myC=new DynamicControl(); protected void Page_Load(object sender, EventArgs e) { foreach(var c in table.Columns) { myC.DataField=c.DisplayName; FormView1.Controls.Add(myC); } } but I can not see the desired result. where is the problem. thanks

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• WinForms HTML visualizing controls comparison

  - by DarkDeny

  Hello all! I am working on some project which requires some HTML visualizing control (WinForms). Currently I am aware only of two such a controls: AxWebBrowser (as far as I understand this is IE-based ActiveX control for winforms) Nabu HTMLView (open source library with visualizing capabilities). Are there any other choices? What are their cons and pros? How configurable they are? For example I want to disable navigation and scripts, hook onto loading methods to override resources loading and so on.

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• Add a delay to OnContactDown events for Surface controls

  - by RTigger

  We're using the Controls.PreviewContactDown, PreviewContactUp, and PreviewContactChanged events to capture tagged items being placed, removed, and moved on the Surface, which works great in the Simulator application that comes with the surface. On an actual Surface if you moved a tagged item too quickly the cameras actually lose focus of the tag, assume it was removed, and then re-capture it when it stops moving. That provides a pretty poor experience for our clients. What I'm proposing is a way to override or create a new event that would respond to tagged item events, but not fire the event handler until after a delay... i.e. if "ContactUp" is fired, wait 100ms and THEN execute the event handler. Ideally we'd just be able to use an alternate attached property to define these event handlers, i.e. <Panel local:TagDown="TagDownEventHandler" /> And if we could get it to use ICommand objects instead of event handlers that'd be even better.

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• Handling multiple UISwitch controls in a table view without using tag property

  - by Thaurin

  I have a table view controller with multiple UISwitch controls in them. I set the delegate to the table view controller with the same action for all switches. I need to be able to determine what switch was changed, so I create an array of strings that contains the name of each switch. The indexes in the array will be put in the tag property of each UISwitch. However, I'm ready using the tag property for something else, namely to find the right control in the cell in cellForRowAtIndexPath with viewWithTag! (There are several things I need to set within each cell.) So, am I thinking along the right lines here? I feel I'm rather limited in how I find out exactly which UISwitch changed its value, so I can do something useful with it.

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• Forms Authentication and Login controls

  - by DotnetDude

  I am upgrading a website written using ASP.NET 1.1 and the logic for the login page includes verifying the credentials, calling FormsAuthentication.SetAuthCookie() and populating the Session with the user information. I am updating this page to use Login controls and the Membership API and am trying to wrap my head around the concepts that have been changed. Most of the samples I see do not do anything on the login button event handler, so is the logic of setting the cookie abstracted out into the control? Also, how do I check if a user is logged in or not on other pages. Does it still store user information using the Session? How do I check if a user belongs to a particular role or not (Earlier, I would look in the Session object to do something like this) Is the Session a bad way of storing user info? Thanks

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• Dynamically create controls using stringbuilder

  - by Shrewdy

  hi, i have been trying to create controls dynamically on my web page using the StringBuilder class..and i dont quite seem to get through... any help would be appreciated. i am trying to do this... StringBuilder sbTest = new StringBuilder(string.Empty); sbTest.Append("<input type=\"text\" id=\"txt1\" runat=\"server\" />"); Response.Write(sbTest.ToString()); The page for sure displays a TextBox on the browser which is easily accessible through JavaScript...but what i want is the control to be available on the Server Side too...so that when the page is posted back to the server i can easliy obtain the value that has been entered by the user into the textbox. Can any 1 please help me with this.... thank you so much....

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• ScrollBars are not visible after changing positions of controls inside a Canvas

  - by akjoshi

  Hi, I created a custom canvas control inheriting from WPF Canvas. I am using it like this in main window - <ScrollViewer HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Auto"> <RTD:RTDesignerCanvas Margin="5" Background="White" x:Name="canvas1" Focusable="True" AllowDrop="True"> </RTD:RTDesignerCanvas> </ScrollViewer> Everyhting works fine but when I try to set the position of controls inside it like this Canvas.SetTop(item, 200); scrollbars are not visible and control is hiddedn down somewhere. Intrestingly, if I add another control to it scroll bars are visible and I can scroll downwards to see the previous control. I tried to use base.InvalidateVisual(); base.UpdateLayout(); base.InvalidateArrange(); after changing items Top or Left but nothing happens; Am I missing something or this happens due to some bug?

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• How to dynamically add controls in asp.net Dynamic Data

  - by loviji

  Hello, i'm trying to work with asp.NET Dynamic Data. So, I see asp.NET Dynamic Data not well learned by people as other technologies. now, to my question. Lets us work with Details.aspx page that located on ~\DynamicData\PageTemplates I need to add <asp:DynamicControl runat="server" to page into Form1.detailsTable. i've tried like this: protected DynamicControl myC=new DynamicControl(); protected void Page_Load(object sender, EventArgs e) { foreach(var c in table.Columns) { myC.DataField=c.DisplayName; FormView1.Controls.Add(myC); } } but I can not see the desired result. where is the problem. thanks

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• Are Inherited Forms And/Or Inherited Controls possible in Managed C++

  - by Ali Akdurak

  Hello everyone The question is actually pretty self explanatory but I will further clarify it. I am building a simple application to show a load [file] for 5 different types of [files]. So all these 5 forms will have similar GUI elements such as a listbox and a load button with a small textbox/label to show the summary of the [file]'s information. My desired effect is something like visual studio's C# template for Inherited User controls or Inherited forms. I already heavily googled the concept to look for a C++ visual studio template to the trick but I couldn't find it. The word [file] is in brackets because open file dialogue will not the trick as this list of files to select form comes form an SQL server. Thanks a lot!

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• Grouping Windows Forms Radiobuttons with different parent controls in C#

  - by Jerry

  Hi, I've got a Windows Forms application in which I have a number of RadioButtons. These RadioButtons are placed within a FlowLayoutPanel which automatically arranges them for me. All RadioButtons that are directly added to the FlowLayoutPanel are grouped, meaning I can select only one of them. However, some of these RadioButtons are paired up with a TextBox so I can supply some argument there. But to have all this arranged properly, I add a Panel control to the FlowLayoutPanel so I can control the alignment of the RadioButton and TextBox relatively to each other myself. These RadioButtons now have their own respective Panels as parent controls and thus are no longer included in the radio group with the other RadioButtons. I read that the the RadioButtons that are in the System.Web.UI namespace have a GroupName property, but unfortunately their System.Windows.Forms counterparts lack this property. Is there some other way I can group these radio buttons are am I going to have to handle onClick events myself? Thanks, Jerry

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• ASP.Net AJAX controls, adding via .ashx page

  - by Matt Dawdy

  Okay, this is a continuation of a previous question of mine, but it is distinct enough to be its own question. Based on user interaction, I'm calling a .ashx handler via a jquery ajax call, and that handler is building some html for me that includes some Telerik controls like a masked textbox (masked for a phone number like "(###) ###-####". I got around all the hurdles of using Render() to get the html output of a server control even when it doesn't have a "Page" object or a ScriptHandler object. However, when I show the control to a user, I see the mask in the text of the textbox, but the mask doesn't "work" in the sense that when a user starts typing, it is as if the mask is really just text. So, my question is, after putting the html code out for a masked textbox, how do I tell whatever javascript is supposed to mask the input to really start masking on that specific control? I really hope this made sense. Please tell me if you need any clarification.

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• Customizing the behavior of ControlDesigners for Controls derived from native .NET controls.

  - by Eric

  My question is related to this question: http://stackoverflow.com/questions/93541/baseline-snaplines-in-custom-winforms-controls However, in my case, I have created a new control that derives from TextBox rather than containing a TextBox. I would like to have a custom ControlDesigner, but I would like to modify the behavior of the TextBox's designer rather than having to write a complete designer myself. In particular, I'd like to be able to return the TextBox's SnapLines while providing some custom verbs. Is there a good way to do this? EDIT: To clarify, this is for Windows Forms in .NET 2.0.

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• When to databind data-bound controls?

  - by sanjuro

  Hi, i have little dilemma, i often use data-bound controls such as Gridview in conjunction with ObjectDataSource. But i have two possible options when can i bind data to Gridview. The first is that i set datasourceid of gridview in aspx file and databind occurs in a moment before PreRender event occurs or i can set datasource in Page_Load event and databinding occurs immediately, something like this: protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { testGridView.DataSource = testObjectDataSource.Select(); testGridView.DataBind(); } } I think that in second approach i have more control above databinding. But how it is in real programming life? Which of the above two options is commonly used? Or is there some third option how can i bind data to data-bound control? Thanks for your opinions from real-life experiences.

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• Flex 4 how to layout spark controls in an html table type way

  - by Amy

  I have a group of controls and I want to organize them in a table like fashion. I want 1 row and 6 columns. Col 1,3,4,5,6 should all auto size to the contents and col 2 should take up the remaining available space. When the size of the group changes, only col2 width should change. I also want to be able to set the alignment of each cell. How can I do this in flex 4? I found a reference to mx:constraintColumns but this seems to be used with the canvas and in flex 4 adobe suggests not using canvases. Is there something similar in flex 4? I'm looking for something along the lines of Grid/Grid.ColumnDefinitions in silverlight.

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• Facing problem in VB6.0 Activex Controls design.

  - by Dharmaraju

  Hi, This is dharmaraju, I am facing some problem in Activex Controls design. Kindly help me to resolve the issue. Problem Description: I have created a property mentioned below for a textbox. Public Property Let DataControl_Value(ByVal Value As Variant) Public Property Get DataControl_Value() As Variant This property is editable at design time if i use it VB6.0 Applications. Same thing is read only in case if i use it in vc++ MFC applications. I have defined one more property like below. Public Property Let DataControl_DataItemDef(ByVal Value As DTMDATACONTROLLib.IXMLDOMNode) Public Property Get DataControl_DataItemDef() As DTMDATACONTROLLib.IXMLDOMNode In this case the "DataControl_DataItemDef" property will not be available at design time.[not displaying in control's property window.] Kindly help me to resolve the issue.

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• VB.NET 2.0 - StackOverflowException when using Thread Safe calls to Windows Forms Controls

  - by LamdaComplex

  I have a Windows Forms app that, unfortunately, must make calls to controls from a second thread. I've been using the thread-safe pattern described on the http://msdn.microsoft.com/en-us/library/ms171728.aspx. Which has worked great in the past. The specific problem I am having now: I have a WebBrowser control and I'm attempting to invoke the WebBrowser.Navigate() method using this Thread-Safe pattern and as a result I am getting StackOverflow exceptions. Here is the Thread-Safe Navigate method I've written. Private Delegate Sub NavigateControlCallback(ByRef wb As WebBrowser, ByVal url As String) Private Sub AsyncNavigate(ByRef wb As WebBrowser, ByVal URL As String) Try If wb.InvokeRequired Then Dim callback As New NavigateControlCallback(AddressOf AsyncNavigate) callback(wb, url) Else wb.Navigate(url) End If Catch ex As Exception End Try End Sub Is there a Thread-Safe way to interact with WinForms components without the side effect of these StackOverflowExceptions?

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• Dynamically Adding ASP.NET Web Forms Controls Loses State on Page Refresh

  - by Geetha

  I am creating dynamic label and textbox based on the number of values from the database for the selected item of the dropdownlist. Then the dynamic labels will have the names and the text box with the values. To retain the values of these controls im using Page_init event. So im using cache to hold the selectteditem from the dropdownlist. Problem: The process is going fine. But if i try to refresh the page no items are selected in the dropdown list but the cache is not getting clear so using this cache value dynamic control are creating.

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• how do I notify child controls of a change in the parent

  - by fishhead

  what is the best way to keep a child control up to date for changes in the parent. I have a number of child controls hosted inside my parent object and I can think of two ways to send change information to them. 1) wire the child control to an event in the parent. and fire that event on a change in the parent 2) keep a list of the children in an array and intenerate through the array when the change has happened and invoke a method in the child to handle the new changes. I hope I describe it okay. both work but there is probably a right way to handle this and a wrong way.

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• ASP.NET MVC Using Multiple user controls on a single .aspx(view)

  - by Pinu

  I am getting this following error , when i am tring to having two user controls in one page. The model item passed into the dictionary is of type 'System.Linq.EnumerableQuery1[Data.EventLog]' but this dictionary requires a model item of type 'System.Collections.Generic.IEnumerable1[Data.Notes]'. <%@ Page Title="" Language="C#" MasterPageFile="~/Views/Shared/Site.Master" Inherits="System.Web.Mvc.ViewPage" %> <asp:Content ID="Content1" ContentPlaceHolderID="TitleContent" runat="server"> Test </asp:Content> <asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="server"> <h2>Test</h2> <% Html.RenderPartial("~/Views/Shared/UserControl/Tracking.ascx"); %> <% Html.RenderPartial("~/Views/Shared/UserControl/Notes.ascx"); %> </asp:Content>

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• How to make some simple GUI controls?

  - by daniels

  I need to make a DirectX or OpenGL app and i will need a custom GUI for that. I think a button, a input text box, a list box (that will need a scroll bar as there will be more items that can fit on the screen) and a slider control will be enough. I know about CeGUI framework but i just don't like it, way too many XML files for my taste. My question is where should i start in learning how to do this custom GUI controls, are there any tutorial available or any material that could get me started? I haven't done a GUI contol myself before.

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• ASP.NET Controls with Highly Customizable GUI

  - by micha12

  We are developing an ASP.NET web application where some of the features that we will need to implement are quite standard: for example, a chat between users, a forum, etc. There are ASP.NET chats and forums components available. However, they all have a predetermined GUI and html markup that is almost impossible to change and very difficult to customize. And this is a very common situation for most controls like grids, etc.: you have very low control over the html markup that is being generated by the control. In our case, our web app will have its own web design created by a professional web designer in PhotoShop, and then it will but transformed into html markup that will then be transformed in aspx pages. We would ideally like to create the html markup for the forum and chat by ourselves, and use only the non-GUI part of the ASP.NET components. Is this approach feasible? Has anyone dealt with such approach in practice?

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• LinkButton child controls render

  - by Alex

  Hi. I want to have a LinkButton that adds 'span' tag around the text. protected override void Render(HtmlTextWriter writer) { Text = String.Concat("<span>", Text, "</span>"); base.Render(writer); } It's works perfectly, but only if I add text like this: <cc:TestLinkButton ID="TestLinkButton" runat="server" Text="SomeText"> </cc:TestLinkButton> If I want to add some image I will write something like this: <cc:TestLinkButton ID="LinkButton1" runat="server"> <asp:Image ID="Image1" runat="server" ImageUrl="~/Images/icon_holiday.png" BorderWidth="0" /> SomeText </cc:TestLinkButton> In this case Text property will be empty, because actualy "SomeText" is child control property. So question is is how to add tag around child controls.

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• Sliding & Fading controls on a C# form

  - by Tommy

  Hey there, I'm trying to implement a way to slide&fade controls around (more than one at the same time possibly) elegantly. So in other words, say i had a picture in the top left corner, and a texbox in the bottom right corner, i'd like to be able to have them slide. not just snap. slide, to the opposite corners and replace eachothers position. Ive been working for awhile but have not come up with anything efficient, even just some of the basic math calculations would be a great start.

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