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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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  • .Net forms - intercepting the Close X event.

    - by Hamish Grubijan
    Hi, this must be a dumb question, but I cannot figure it out. I also cannot use the designer because coders before me managed to throw GUI and logic all in one, so now it is confused. I've got to do it the old school way. I have a Form which can be closed in 3 ways: Close button, File / Close menu, and the X icon. I want them all to do the same thing. Intercepting the button and the menu events is easy. In fact, both are hooked up to an onCloseConfig method. Btw, is there a better name for this method? private void onCloseConfig(object sender, System.EventArgs e) { if (! m_configControl.Modified) { Application.Exit(); // Or should it be this.Close(); } .... // Else present a dialog, ask if they want to save. } So, to intercept the X I tried: this.FormClosing +=new FormClosingEventHandler(this.onCloseConfig); I believe this is what causes an infinite loop. I do not want that :) FormClosed is another option, but it seems too late. I just want to intercept the fact that the X was clicked, not the fact that the form is closing. Please help. Thanks!

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  • How do i make a picturebox selectable?

    - by acidzombie24
    I am making a very basic map editor. I'm halfway through it and one problem i hit is how to delete an object. I would like to press delete but there appears to be no keydown event for pictureboxes and it will seem like i will have it only on my listbox. What is the best solution for deleting an object in my editor?

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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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  • How do I stop the designer from filling in my properties with null values?

    - by Tim Gradwell
    When I add a control to a form, visual studio assigns various of the properties of that form a value of null in the auto-generated designer code. I don't want the designer to make the redundant assignment (the value is already null). Can anyone tell me how to prevent it? example MyControl has property public SomeClass MyProperty { get { return m_MyValue; } set { m_MyValue = value; } } designer then autogenerates the following: myControl1.MyProperty = null;

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  • Casting error in my form

    - by Siva
    I have a ComboBox in a DataGridView. However I get an error when I run it: Unable to cast object of type 'System.Windows.Forms.DataGridView' to type 'System.Windows.Forms.ComboBox'. What can I do to resolve this error? ComboBox comboBox; private void dataGridView1_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e) { if (e.Control is ComboBox) { comboBox = e.Control as ComboBox; if (dataGridView1.CurrentCell.ColumnIndex >= 0) { System.Diagnostics.Debug.WriteLine("Edit Control Showing"); comboBox.SelectedIndexChanged -= new EventHandler(comboBoxItems_SelectedIndexChanged); comboBox.SelectedIndexChanged += new EventHandler(comboBoxItems_SelectedIndexChanged); } } } void comboBoxItems_SelectedIndexChanged(object sender, EventArgs e) { try { int comboBoxSelectedIndex = ((ComboBox)sender).SelectedIndex; string comboboxSelectedValue = ((ComboBox)sender).SelectedText; int gridViewSelectedRow = dataGridView1.CurrentRow.Index; if (comboBoxSelectedIndex >= 0 && gridViewSelectedRow >= 0) { System.Diagnostics.Debug.WriteLine("ComboBox Index - " + comboBoxSelectedIndex); System.Diagnostics.Debug.WriteLine("GridView Index - " + gridViewSelectedRow); if (comboBox != null) { comboBox.SelectedIndexChanged -= new EventHandler(comboBoxItems_SelectedIndexChanged); } } } catch(Exception E) { } }

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  • Do not want Form to display over other application windows

    - by Cat
    I am displaying a Form from one process by passing the Show method a window handle from another process. I only want this new Form to display above the passed Form, like a MessageBox. However, this newly launched Form appears above other application windows, despite: Setting Process.WindowStyle.Hidden to the Form-displaying process Overriding the ShowWithoutActivation and CreateParams properties of the Form. Making sure Form.TopMost is not true I have checked that the window handle is valid from the second process. Focus is not stolen, however. Process A: Pass (Form) window handle to a new Process B via the command line Process B: Display a new Form using Form.Show(anotherProcessWindowHandle)

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  • C# - How to prevent fullscreen form covering the taskbar?

    - by Dodi300
    Hello. Does anyone know how I can prevent my C# winform covering/going on top of the taskbar? My form's border style has been set to "FixedToolWindow" which seems to cause this. I thought about reducing the height of the form, when the user makes the form maximized, but that wouldn't work as people may have different size taskbars. Any ideas? Thanks.

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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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  • 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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  • My.Settings not saving after install

    - by blancaster
    My application is not saving users settings after I install it. When I test my app in debug or release mode it works fine. However after compiling, linking and installing the My.Settings.Save() does not seem to be working. I can manually change a setting in the config file and the app runs accordingly. So I know it’s reading the config file on application startup. What am I doing wrong? Thanks

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  • For a DataGridView, how do I get the values from each row?

    - by David L
    I am wondering what is the best way to go iterate through all the rows in a datagridview and get the values from the cells. Here is what I am thinking of doing, but I don't really like it because if I rearrange the columns then the code will also have to be changed. for (int i = 0; i < dataGridView.RowCount; i++) { string Value0 = dataGridView1.Rows[i].Cells[0]; string Value1 = dataGridView1.Rows[i].Cells[1]; string Value2 = dataGridView1.Rows[i].Cells[2]; }

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  • How do i set this window to topmost?

    - by acidzombie24
    How do i set my window above all other? I need a bad but noticeable msg box that closes on its own. Msg is a dummy form which is empty. All i want is its title. The problems with the code is the window isnt created 0,0 (its just whereever windows feels like putting it). The width is correct but i notice if i click firefox or another app window my app doesnt pop up. I know it is being shown bc i can see it in the taskbar at the bottom for a brief second. So the bugs so far Doesnt go topmost if i click another app Isnt 0,0 How do i fix this? { var msg = new Msg(); msg.Text = (has ? "*" : "+") + args[0]; msg.TopMost = true; msg.Width = 2000; msg.Top = 0; msg.Left = 0; msg.Show(); System.Threading.Thread.Sleep(1000); msg.Close(); }

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  • Hotkey (Not Global) WinForm .NET

    - by acidzombie24
    In my winform app i would like one special button to run a test everytime i press it. There are dozens of controls so implementing it in each one takes too much time. Is there a way i can set a hotkey so no matter what i am doing in the app i can press the key and it will fire off my event?

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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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  • Best way to handle different panels occupying same area

    - by gmnnn
    I have this application: I want to change the marked area when the user is clicked one of the navBarItems (like Microsoft OUTLOOK). I've been doing some research and a lot of people said that I can add several panels and show/hide them when user is clicked a navBarItem. But the area will contain a lot of gridviews and a lot of other controls. I don't know if I want to initialize all of them when application starts because it's gonna be hard on the cpu and memory to keep all the controls running at the same time. And I don't think it's an elegant solution for this kind of situation. But if I choose to initialize controls when user is clicked to corresponding navBarItem, it's gonna be laggy for the user. What is the best design approach for this situation? PS: I can use commercial libraries too. Thank you.

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  • POP3 Transmission Process

    - by j-t-s
    Hi All I was wondering if anyone could help me out (not with code, although that would be appreciated), with the logic behind checking and retrieving messages from a POP3 mail server. I.e. Establish connection Validate credentials Enumerate message list Check each message to see if it's "new" Download "new" message(s). Would this be the correct way about doing this? Thank you

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  • question about windows controls changed event

    - by Mike
    I have several controls on my form and on changed event the logic entity properties are changed. Is it possible not to implement changed event for every control,but do it in one place and update my logic entity when user is making changes on the form?

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