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  • how do I get the height of a rich text content after word wrap?

    - by Led
    Question A. Given 1. A string in rich text format that may have paragraph, tabs, space, line break, indentation, (or even image?) 2. A width for the word wrapping rich text control/editor How do I know the height of the content after it have performed all the word wrapping? Is there something like int MeasureRichTextHeightAfterWordWrap(string aRichTextContent, int aWidth)? Otherwise how does those rich text control know how much to autosize? Do I have to actually place the content on a dummy rich text control and get its height afterwards? Question B. Similar to question A but in plain text onto a plain text memo/control/editor. And manually draw string with manually calculated indentations, breaks, word wrappings. Is it easier or harder?

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  • WPF User Control is causing Out of Memory Exception

    - by Chairman Meow
    Looking for a free spell checking solution, I thought I was so smart in doing this but I guess not. I have created a windows form based application and I want the form to add a user specified amount of user controls (with textboxes) on to a panel. The user can then click some button and the controls on this panel are cleared and new ones are added. The user does something and the process is repeated. Now, I wanted these textboxes to support spell checking and looked all over for a free solution. WPF textboxes support spell checking where the ones in regular win forms do not. I thought I would be able to use these WPF textboxes by adding them to an ElementHost object which is, in turn, within a panel. This panel would be a user control. So, in my application, I would be able to add instances of these user controls onto the form and make use of .NET's spell checking goodness. This actually worked but after using the application for a while, found that the application would eventually freeze on me due to out of memory errors. I have pinpointed the memory errors to these WPF controls since this problem does not happen with normal textboxes. When the window is opened and the number of controls is specified, this is pretty much how the controls are added: Dim xOffset As Integer = 0 For i As Integer = 0 To theNumber Dim myUserControl As New SpecialUserControl() myPanel.Controls.Add(myUserControl) myUserControl.Location = New Point(7, 7) myUserControl.Location = New Point(xOffset, 7) xOffset = xOffset + 207 Next Note that: myPanel is a panel on a form SpecialUserControl is the user control with WPF textbox (within an ElementHost object) When the user pressed a button, the panel is cleared: myUserControl.Controls.Clear() The user can then repeat the process. There are a lot of results on the internet when I tried to find a solution and I'm thinking that the problem I am having is due to the fact that the WPF control is not going away even after clearing the panel. Following this conclusion, I have tried different solutions regarding disposing these controls or setting them to nothing but the memory problem keeps occurring. If someone could give me some advice or ideas here, I'd really appreciate it.

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  • C# ErrorProvider Want to know if any are Active

    - by RcK
    I want to know if any ErrorProvider are active in my form. being able to find this out might help reduce my code.. I did find this thing here Counting ErrorProvider but incase someone knows a better way... so here goes. Ok so basically I have a WinForm which has many TextBoxes Now when user enters values I use Validating to perform validation and if it does not match Regex I set the ErrorProvider ON for that Control.. similarly if the user changes the value to a acceptable one I switch ErrorProvider OFF for that Control.. but when SAVE is clicked i have to do another check anyways incase the user did not listen to me and change the thing like he was supposed to and still clicked SAVE.. I dont want the thing crashing.. soo mm is there like a thing where I could say if ErrorProviders is not active then proceed with save else message box saying change it. [ANOTHER QUESTION] Umm When Validating it only Validates when the Control loses Focus... I kinda of want it to do validation when user stops typing.. I hope you get what I mean Like Email Address(textbox) when user is typing his/her name in I [DON'T] want it to do validation yet, but when user has finished entering is waiting for ErrorProvider to disappear(But it doesn't coz it only does that when control loses focus) 2 odd seconds after typing can i make the validation take place?

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  • Parts of statusbar disappearing with IE BHO

    - by Jake Resier
    I have a C# IE BHO in use for an internal company app that is adds a pane to the statusbar with SB_SETPARTS (it mitm's the SETPARTS call and inserts an element into the array) and then draws the controls by moving them from a hidden (in-process) form with SetParent() This technique works well but it causes other parts of the statusbar to appear briefly and then disappear. Affected parts seem to be all of the panes that don't have their own hWnd, eg the "Internet | Protected Mode" and icon, and some of those icons that appear in the six panes immediately to the left. Does anyone know what is causing this? I suspect that either certain messages aren't getting to the statusbar32 control to draw the stuff, or my WindowsForms10 additions are sending out extraneous messages. Everything appears fine for about a second, and then the other parts just disappear.

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  • How to Detect Right Click on the Taskbar

    - by Zay
    I've got a Windows Forms application in C# that starts off with a loading dialog. As expected, a button for the app shows up in the Windows taskbar. I would like to detect right-clicks that might be done to that button. Ultimately, I hope to disable the right-click or simply have the loading dialog regain focus. I've seen that some people use custom libraries and packages (interop, for example) to achieve some Win32 functionality, but I'd personally like to avoid this. Is it impossible to do without such libraries/packages?

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  • Is there a way to delay an event handler (say for 1 sec) in Windows Forms

    - by Essam
    I need to be able to delay the event handlers for some controls (like a button) to be fired for example after 1 sec of the actual event (click event for example) .. is this possible by the .net framework ? I use a timer and call my code from the timer's tick event as below but I am not sure if this is the best approach ! void onButtonClick( ..) { timer1.Enabled = true; } void onTimerTick( ..) { timer.Enabled = false; CallMyCodeNow(); }

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  • Resize a ListView depending on how many items?

    - by Dodi300
    Hello. How can I resize the height of a ListView depending on how many items are in that ListView? I'm trying to get the text of an item which is clicked, however whenever the user clicks on a space which has no item, there's an error. The exact error is: InvalidArgument=Value of '0' is not valid for 'index'. Parameter name: index. I'm using the code: label14.Text = myListView1.SelectedItems[0].Text.ToString(); I figured that removing the space below the items will solve this problem. Thanks!

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  • WinForm Text Control that displays current character/character limit

    - by Refracted Paladin
    I need a way to display, like you see in some web apps, the current characters/character limit for a Text Control(i.e. 3/500). I usually see this as a label residing directly above or below the Text Control. How is this 'normally' accomplished? Should I override my Text Control somehow? Do I just manually add labels by every Text Control and 'bind' them to properties of the Text Control? Do I need to create a composite control that has the Text Control & Label Controls together to accomplish what I need? Any direction or help will be greatly appreciated.

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  • Localize node texts in treeview using resource files

    - by Obalix
    For a project I need a tree view that allows the user to select a module, which then is displayed in a content area. The project relies heavily on localization and this is provided by the resource files. Now I discovered today, that the text that are assigned to preset tree view nodes are not contained in the resource files. So the question is whether there is a way of doing this, short of mapping the elemenst in code. I.e. assigning a name to the node, running over all nodes and pulling the resources from the resouce manager based on the node name. This is what I am currently doing, however, it just doesn't "feel" right: private void TranslateNodes(TreeNodeCollection treeNodeCollection) { var rm = Resources.ResourceManager; foreach (TreeNode node in treeNodeCollection) { node.Text = rm.GetString(node.Name + "_Text"); this.TranslateNodes(node.Nodes); } } Thanks!

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  • Propertygrid changes not picked up when using menu shortcut for saving

    - by Ebbe
    I am trying to implement a simple windows forms application, where the user can edit instances of a simple Person class. The application makes use of the standard propertygrid, assigning instances of the Person class to the SelectedObject property of the propertygrid. When the user clicks the menu item Save, the application gets the selected item from the propertygrid and saves it. This works fine. However, if a shortcut such as ctrl+S, assigned to the menu item, is used for saving the SelectedObject of the propertygrid, then the changes are not picked up. It appears to be related to the fact that the properties of the Person object are not updated unless the field in the propertygrid looses focus, and the ctrl+S shortcut doesn’t take away focus from fields in the propertygrid. Other developers, such as Mark Gilbert, have solved this issue by forcing away focus from the propertygrid, but this seems to be a bit of a hack, especially since it would be nice to keep the focus at the field. The Visual Studio developers apparently got it right, but I haven’t figured out how.

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  • Customized sorting on DataTable in C#?

    - by Steve
    This is a C# Winform question. I have a DataGridView which is bounded to a DataTable. I construct the DataTable myself, which several DataColumn instances. When the DataTable is bound to the DataGridView, by default, every column is sortable by clicking the headers of the DataGridView. But the sorting behavior is something "by default". It seems that it is sorted by string. This is true even if I put this as my code: DataColumn dc = new DataColumn("MyObjectColumn", typeof(MyObject)); And MyObject has overriden ToString() and has implemented the IComparable interface. That means even if I have told the DataTable how to sort the special column with the implementation of IComparable interface, DataGridView still doesn't do it the way I expect. So how can I let DataTable sort data in the way I want? Thanks for the answers.

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  • Binding Source suspends itself when I don't want it to.

    - by Scott Chamberlain
    I have two data tables set up in a Master-Details configuration with a relation "Ticket_CallSegments" between them. I also have two Binding Sources and a Data Grid View configured like this (Init Code) // // dgvTickets // this.dgvTickets.AllowUserToAddRows = false; this.dgvTickets.AllowUserToDeleteRows = false; this.dgvTickets.AllowUserToResizeRows = false; this.dgvTickets.AutoGenerateColumns = false; this.dgvTickets.ColumnHeadersHeightSizeMode = System.Windows.Forms.DataGridViewColumnHeadersHeightSizeMode.AutoSize; this.dgvTickets.Columns.AddRange(new System.Windows.Forms.DataGridViewColumn[] { this.cREATEDATEDataGridViewTextBoxColumn, this.contactFullNameDataGridViewTextBoxColumn, this.pARTIALNOTEDataGridViewTextBoxColumn}); this.dgvTickets.DataSource = this.ticketsDataSetBindingSource; this.dgvTickets.Dock = System.Windows.Forms.DockStyle.Fill; this.dgvTickets.Location = new System.Drawing.Point(0, 0); this.dgvTickets.MultiSelect = false; this.dgvTickets.Name = "dgvTickets"; this.dgvTickets.ReadOnly = true; this.dgvTickets.RowHeadersVisible = false; this.dgvTickets.SelectionMode = System.Windows.Forms.DataGridViewSelectionMode.FullRowSelect; this.dgvTickets.Size = new System.Drawing.Size(359, 600); this.dgvTickets.TabIndex = 0; // // ticketsDataSetBindingSource // this.ticketsDataSetBindingSource.DataMember = "Ticket"; this.ticketsDataSetBindingSource.DataSource = this.ticketsDataSet; this.ticketsDataSetBindingSource.CurrentChanged += new System.EventHandler(this.ticketsDataSetBindingSource_CurrentChanged); // // callSegementBindingSource // this.callSegementBindingSource.DataMember = "Ticket_CallSegments"; this.callSegementBindingSource.DataSource = this.ticketsDataSetBindingSource; this.callSegementBindingSource.Sort = "CreateDate"; //Function to update a rich text box. private void ticketsDataSetBindingSource_CurrentChanged(object sender, EventArgs e) { StringBuilder sb = new StringBuilder(); rtbTickets.Clear(); foreach (DataRowView drv in callSegementBindingSource) { TicketsDataSet.CallSegmentsRow row = (TicketsDataSet.CallSegmentsRow)drv.Row; sb.AppendLine("**********************************"); sb.AppendLine(String.Format("CreateDate: {1}, Created by: {0}", row.USERNAME, row.CREATEDATE)); sb.AppendLine("**********************************"); rtbTickets.SelectionFont = new Font("Arial", (float)11, FontStyle.Bold); rtbTickets.SelectedText = sb.ToString(); rtbTickets.SelectionFont = new Font("Arial", (float)11, FontStyle.Regular); rtbTickets.SelectedText = row.NOTES + "\n\n"; } } However when ticketsDataSetBindingSource_CurrentChanged gets called when I select a new row in my Data Grid View callSegementBindingSource.IsBindingSuspended is set to true and my text box does not update correctly (it seems to always pull from the same row in CallSegments). Can anyone see what I am doing wrong or tell me how to unsuspend the binding so it will pull the correct data?

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  • .net Value Class sorting with IComparable

    - by greggorob64
    I'm running into an issue using a DataGridView bound to a iBindingListView implementation (third party dll) attached to a large collection. There's a certain property in my collection type, named MyDateTime, which is a value class similar to DateTime, but also with some legacy code. This VALUE CLASS implements iComparable, iComparable<T>, and iEquatable<T>. The issue I'm having is this: When I apply a sort to the iBindingListView, or the Automatic Sorting provided by the DGV on the MyDateTimeColumn, it ALWAYS uses the non-generic iComparer, causing hundreds of thousands of unnecessary boxing and unboxing. When I remove the non-generic iComparer, the generic one is still not used, it just does a string compare on the .ToString(). Am I missing something? Why is my generic comparer not bieng called on a sort?

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  • how to get all controls of win form?

    - by Shailesh
    i have a win form named A , A contains lots of different controls ,first contains a main groubbox and this groupbox countains lots of table and others group boxes. i want to find a control which has tab index 9(example) in form A but i dont know which groubox contains this control. how i found this control. regards Shailesh

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  • Custom listbox sorting

    - by Arcadian
    I need to sort the data contained within a number of listboxes. The user will be able to select between two different types of sorting using radio boxes, one of which is checked by default on form load. I have created the IF statements needed in order to test whether the checked condition is true for that radio button. but i need some help to create the custom sort algorithms. Each list with contain similar looking data, the only difference in the prefix with which each line starts. For example each line in the first listbox starts with the prefix "G30" and the second listbox will be "G31" and so on. There are 10 listboxes in total (G30-G39 in terms of prefixes). The first search algorithm has to sort the lines by the number order of the first 13 chars. Example: This is how the data looks before sorting G35:45:58:11 JG07 G35:45:20:41 JG01 G35:58:20:21 JG03 G35:66:22:20 JG05 G35:45:85:21 JG02 G35:64:56:11 JG03 G35:76:35:11 JG02 G35:77:97:12 JG03 G35:54:29:11 JG01 G35:55:51:20 JG01 G35:76:24:20 JG06 G35:76:55:11 JG01 and this is how it should look after sorting G35:45:20:41 JG01 G35:45:58:11 JG07 G35:45:85:21 JG02 G35:54:29:11 JG01 G35:55:51:20 JG01 G35:58:20:21 JG03 G35:64:56:11 JG03 G35:66:22:20 JG05 G35:76:24:20 JG06 G35:76:35:11 JG02 G35:76:55:11 JG01 G35:77:97:12 JG03 as you can see, the prefixes are the same. so it is sorted, lowest first, by the next pair integers, then the next pair and the next but not by the value after "JG". the second sort algorithm will ignore the first 13 chars and sort by order of the value after "JG", highest first. any help? theres some rep in it for you :) thanks in advance

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  • Sending keystrokes to a program

    - by Or Betzalel
    In window form, I made a button and I'm trying to make it send F1 to a specific window (Such as FireFox, My Computer, etc...) My questions are : How do I do it by the window's name? (such as "Mozilla Firefox") How do I do it by the process's name? (such as firefox.exe)

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  • How to make a UserControl with a custom DefaultBackColor?

    - by Blorgbeard
    When I right-click on my custom UserControl's BackColor property in the property-grid, then click Reset, I would like the BackColor property to change to (for example) Color.LightGreen, and the property value to appear un-bolded, to indicate that it is the default value. Currently, I know I can do this: public override void ResetBackColor() { BackColor = Color.LightGreen; } Which works as far as setting it to LightGreen on reset. But it still appears bolded in the property-grid, indicating that the current value is not the default. I notice that the Control class has a static read-only property, DefaultBackColor. Unfortunately, since it's static, I cannot override it. Is there some way to get all the functionality I want?

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  • Neither Invalidate() nor Refresh() invokes OnPaint()

    - by user181813
    I'm trying to get from Line #1 to Line #2 in the below code: using System; using System.Windows.Forms; namespace MyNameSpace { internal class MyTextBox : System.Windows.Forms.TextBox { protected override void OnEnabledChanged(EventArgs e) { base.OnEnabledChanged(e); Invalidate(); // Line #1 - can get here Refresh(); } protected override void OnPaint(PaintEventArgs e) { base.OnPaint(e); System.Diagnostics.Debugger.Break(); // Line #2 - can't get here } } } However, it seems that neiter Invalidate() nor Refresh() causes OnPaint(PaintEventArgs e) to be invoked. Two questions: Why doesn't it work? If it can't be fixed: I only want to invoke OnPaint(PaintEventArgs e) in order to access the e.Graphics object - is there any other way to do this?

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  • Internationalize HelloWorld program .NET

    - by RockStarInTraining
    I have small test app which has 2 resource files (Resources.resx & Resources.de-DE.resx) with the same exact string names, but one has the strings converted to German. For my form I set the Localize property to ture. In my application I am getting the strings as such: this.Text = Properties.Resources.frmCaption; In my release folder I get a de-DE folder with a dll named International_test.resources.dll. I try to distribute this to a machine which is set to German and all of the strings pulled are still english. I tried keeping the International_test.resources.dll in the de-DE folder or just put in in my apps directory. What am I doing wrong or what do I need to do to get the German resource file to be used?

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