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  • Infinite loop when Selecting a panel?

    - 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(sender is a panel)... any idea why? EDIT: precision on panels parents: Form => SplitPanel => _AttachedPanel | _LongPanel (_LongPanel contains a reference to _AttachedPanel)

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  • Format TimeSpan in DataGridView column

    - by Dan Neely
    I've seen these questions but both involve methods that aren't available in the CellStyle Format value. I only want to show the hours and minutes portion (16:05); not the seconds as well (16:05:13). I tried forcing the seconds value to zero but still got something like 16:05:00. Short of using a kludge like providing a string or a DateTime (and only showing the hour/minutes part) is there any way I can get the formatting to do what I want.

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  • Have anyone ever create/manipulate a table application from the ground up/scratch?

    - by Darwin
    Have anyone ever create/manipulate a table application from the ground up/scratch? I want to create a table using flash AS 3. I like to have the features like to the MS Studio Web Developer option. The options are create a table, merge cells, split cell, resize columns, delete cell, delete row, delete column etc... I think this is going to be very complicated thing to do. I think the only way to do it is to build it from the ground up because I don’t think Flash has the library/component for it. I was able to create rows and columns by creating the # of rectangles listed it from the left to the right and move the next coordinate for the next row. Now the most challenging this is to manipulate it. This is the must have feature on my website and we don’t want use Javascript to create table on the server side to create the table.

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  • Multiple PictureBoxs' C#

    - by Austin Smith
    I'm having a hard time figuring this out. I know pictureBox only lets you display one image a time. I'm trying to create a pictureBox for each image in my collection. For instance if I have ten images in my List, then the method should create ten pictureBox for those respective images so each one is displayes in a pictureBox. I'm not sure which would be better a for loop or a foreach loop instead. every time the loop increments both the varaiables XCoordinate and YCoordinate which are the location of the PictireBox shoulld increase so that the PictureBox won't overlap one another in the Form. The reason for the method is that the number of images in the collection can change everytime the application will run. That's why I'm not creating them manually. So after its done all the pictures in the list should appear in a picture.Box. The box should be all the same size the only difference is the location on the form and the images inside them. Please any help and I will be grateful

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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 to adjust sliding of scroll according to the value calculated by me?

    - by cng
    I am working on scroll. I have made a program wherein if the scroll box is in particular range of the panel then it automatically moves to a particular position in the slider. For eg, I have a panel of size 500. the scroll has height of 100. Now the total intervals are 5. Now if i slide the scroll box at a position 225 then i want that it automatically slides to the start of that interval that is at position 200. or if i slide to position 450 then instead of staying there it goes to position 400. Is it possible?

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  • moving image to bounce or rotate in a circle

    - by BlueMonster
    I found this small application that i've been playing around with for the past little while. I was wondering, if i wanted to simply rotate the image in a circle? or make the entire image just bounce up and down, how would i modify this program to do so? Everything i've tried will just stretch the image - even if i do get it to move to the left or to the right. Any ideas on what i can do? Code is below public partial class Form1 : Form { private int width = 15; private int height = 15; Image pic = Image.FromFile("402.png"); private Button abort = new Button(); Thread t; public Form1() { abort.Text = "Abort"; abort.Location = new Point(190, 230); abort.Click += new EventHandler(Abort_Click); Controls.Add(abort); SetStyle(ControlStyles.DoubleBuffer| ControlStyles.AllPaintingInWmPaint| ControlStyles.UserPaint, true); t = new Thread(new ThreadStart(Run)); t.Start(); } protected void Abort_Click(object sender, EventArgs e) { t.Abort(); } protected override void OnPaint( PaintEventArgs e ) { Graphics g = e.Graphics; g.DrawImage(pic, 10, 10, width, height); base.OnPaint(e); } public void Run() { while (true) { for(int i = 0; i < 200; i++) { width += 5; Invalidate(); Thread.Sleep(30); } } } }

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  • Unwanted Retriggering of Textbox Events

    - by user348917
    This is one of those "seems obvious" as how to do, but came across interesting side effect in implementing. I'm trying to keep two text boxes syncronized when information is updated. In this example, I will be using txtStartDate and txtEndDate. If the txtStartDate is changed, then the txtEndDate should should be updated. Likewise, if the txtEndDate changes, I want the txtSartDate to be updated. The side effect I'm comming across is that when I set them up under the TextChanged event for both, the events seem to retrigger against each other indefinately (endless loop?). Am I using the wrong event? Is this a task for a delegate?

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  • Sort a DataGridView by DisplayMember

    - by Dave
    Hi, I have a DataGridView that is bound to a DataTable. In this table there are some foreign keys. I am then using the CellFormatting event to get the corresponding text from another database table for each foreign key. I want to sort the DataGridView when the user clicks the header. Automatic sorting works but is not correct as it is Sorting on the ValueMember (ForeignKey ID) and not on the DisplayMember (the text). I tried using the SortCompare event but then I read that it does not work on DataGridViews that use the DataSource property. How can this be done? Thanks

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  • What be the regex to determine whether there is date in the string or not with different date format

    - by Harikrishna
    I am parsing table information from the html table.Now I want to check whether there is date in the records for one particular column.Means I want to check whether there is date in the string or not .And date can be in different format like the string can be FUTIDX 26FEB2009 NIFTY 0 -- There is date in the string. FUTIDX MINIFTY 30 Jul 2009 -- There is date in the string. FUTSTK ONGC 27 Mar 2008 -- There is date in the string. What should be the regular expression for that ?

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  • How to find padding space around the label text?

    - by Ganesh
    I am adding a label controls at run time. I can add or modify text in label and can change the font also.Now my problem is When i changed the font of text in label, alignment is not proper,its due to padding.Is there any way to find how much padding is ocured [ed: obscured?] based on font?

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  • Preventing the "[YourProgramName] has stopped working" dialog on unhandled exceptions.

    - by Serapth
    I have a WinForm application, with some dependencies on an external library that can on occasion cause an exception outside of the running threads context. As it stands now, this is completely OK behavior ( well, except of course the exception ) and we wired up AppDomain.CurrentDomain.UnhandledException to simply restart the program. The only problem is, the [Your Program] has stopped working like the one below, appears: Is there a way to prevent this dialog from appearing at all, be it in the AppDomain unhandled exception handler or in a config setting, as no end users are going to be reading it and it just holds up resources until it is clicked.

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  • Encapsulating a Windows.Forms.Button

    - by devoured elysium
    I want to define a special kind of button that only allows two possible labels: "ON" and "OFF". I decided to inherit from a Windows.Forms.Button to implement this but now I don't know I how should enforce this rule. Should I just override the Text property like this? public override string Text { set { throw new InvalidOperationException("Invalid operation on StartStopButton!"); } } The problem I see with this is that I am breaking the contract that all buttons should have. If any code tries something like foreach (Button button in myForm) { button.Text = "123"; } they will get an Exception if I have any of my special buttons on the form, which is something that isn't expectable. First, because people think of properties just as "public" variables, not methods, second, because they are used to using and setting whatever they want to buttons without having to worry with Exceptions. Should I instead just make the set property do nothing? That could also lead to awkward results: myButton.Text = "abc"; MessageBox.Show(abc); //not "abc"! The general idea from the OO world is to in this kind of cases use Composition instead of inheritance. public class MySpecialButton : <Some class from System.Windows.Forms that already knows how to draw itself on forms> private Button button = new Button(); //I'd just draw this button on this class //and I'd then only show the fields I consider //relevant to the outside world. ... } But to make the Button "live" on a form it must inherit from some special class. I've looked on Control, but it seems to already have the Text property defined. I guess the ideal situation would be to inherit from some kind of class that wouldn't even have the Text property defined, but that'd have position, size, etc properties available. Upper in the hierarchy, after Control, we have Component, but that looks like a really raw class. Any clue about how to achieve this? I know this was a long post :( Thanks

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  • Best way to implement some type of ITaggable interface

    - by Jack
    I've got a program I'm creating that reports on another certain programs backup xml files. I've gotten to the point where I need to implement some type of ITaggable interface - but am unsure how to go about it code wise. My idea is that each item (BackupClient, BackupVersion, and BackupFile) should implement an ITaggable interface for highlighting old, out of date, or non-existent files in their HTML or Excel report. The user will be able to specify tags in the settings. My question is this, how can a user dynamically specify a "tag" such as File Date 3 days old? - Background Color = Red. Actually I guess my question is more, how can I, the programmer, implement this dynamically? I was thinking Expression trees, but am unsure this is the way to go as I havn't studied them much. I know my ITaggable interface would have methods such as AddTag(T tag), RemoveTag(T tag), but what exactly specifies the criteria for the tag to be added? I realize this may be subjective, and can be marked as wiki if need be, but I truly am stuck. Any input would be greatly helpful!

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  • What do C# Table Adapters actually return?

    - by Raven Dreamer
    I'm working on an application that manipulates SQL tables in a windows form application. Up until now, I've only been using the pre-generated Fill queries, and self-made update and delete queries (which return nothing). I am interested in storing the value of a single value from a single column (an 'nchar(15)' name), and though I have easily written the SQL code to return that value to the application, I have no idea what it will be returned as. SELECT [Contact First Name] FROM ContactSkillSet WHERE [Contact ID] = @CurrentID Can the result be stored directly as a string? Do I need to cast it? Invoke a toString method?

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  • How do you get the solution directory in C# (VS 2008) in code?

    - by IsaacB
    Hi, Got an annoying problem here. I've got an NHibernate/Forms application I'm working through SVN. I made some of my own controls, but when I drag and drop those (or view some form editors where I have already dragged and dropped) onto some of my other controls, Visual studio decides it needs to execute some of the code I wrote, including the part that looks for hibernate.cfg.xml. I have no idea why this is, but (sometimes!) when it executes the code during my form load or drag and drop it switches the current directory to C:\program files\vs 9.0\common7\ide, and then nhibernate throws an exception that it can't find hibernate.cfg.xml, because I'm searching for that in a relative path. Now, I don't want to hard code the location of hibernate.cfg.xml, or just copy hibernate.cfg.xml to the ide directory (which will work). I want a solution that gets the solutions directory while the current directory is common7\ide. Something that will let someone view my forms in the designer on a fresh checkout to an arbitrary directory on an arbitrary machine. And no, I'm not about to load the controls in code. I have so many controls within controls that it is a nightmare to line everything up without it. I tried a pre build event that made a file that has the solution directory in it, but of course how can I find that from common7\ide? All the projects files need to be in the solution directory because of svn. Thanks for your help guys, I've already spent a few hours fiddling with this in vain.

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  • Why is the PrintDialog not displaying (in 64 bit)?

    - by Bill
    This code, when built in .Net for Any CPU platform and running on a 64-bit machine, simply returns a DialogResult of Cancel without showing the expected dialog box. Dim dlg As New System.Windows.Forms.PrintDialog If dlg.ShowDialog() = Windows.Forms.DialogResult.OK Then '... print the document ' End If However, it works fine when the application is built for the x86 platform, and run on a 64-bit machine. How can you display the dialog with a 64-bit compile?

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  • How do I create an editable databound combo box in a DataGrid in WinForm

    - by signaldev235
    I have a noob question. I have a WinForm (.net 2.0 in VS 2008) on my from I have a DataGrid One of the fields in that datagrid is a combo box that is bound to a separate table. this works, but I am unable to edit or add, I cannot add a value that is not on the list. I am looking to create a lookup box for lack of a better term. The form is for Parts Order Entry In the data Grid Data Source is PartsOrder_table, the Work order Field is a int in the PartsOrder_table, and the combo box is bound to the WorkOrder_table. The WorkOPRder_Table has WorkOrd_ID int and WrkOrd nvarchar(10) the Combo Box Data Source is WorkOrd_Table Display Member is WorkOrd Value Member is WorkOrder_ID This works great with the problem that I cannot add or select anything not in WorkOrder_table. Any Help would be greatly appreciated. Thanks

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  • How to remove row which has one or more empty or null cell ?

    - by Harikrishna
    I have datagridview on my winform. I am displaying records in the datagridview. Now after displaying the records on the datagridview, I want to remove the row from datagridview which has one or more empy cells that is no value in the cell for that row. So for that I am checking each cell for every row if there is any cell empty or null then I remove that rows using RemoveAt() function. My code is : for (int i = 0; i < dataGridView1.Rows.Count - 1; i++) { for (int j = 0; j < dataGridView1.Columns.Count; j++) { if (string.IsNullOrEmpty(dataGridView1.Rows[i].Cells[j].Value.ToString())) { dataGridView1.Rows.RemoveAt(i); break; } } }

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  • How to handle the close (big X) button at the source?

    - by Simon T.
    We would like under some circumstances to block the action of the close button in the title bar. The problem is that it's a MDI applications and it seems that we will have to add code in each forms to cancel the operation in the Closingevent handler. It seems that the child forms are the first to receive the event. There is no way to add code at a single place to cancel the close operation. Information on how the close event is propagated to the child form would be welcome. Is there a simple way of doing what we want to do?

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