When I Click On A Comboboxcell In A Datagridview, The Background Turns Black?
Apr 27, 2006when i click on a comboboxcell in a datagridview, the background turns black . . .
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DataGridView Cell Turns Black When Accessing EditedFormattedValue?
Jul 8, 2010I have a winforms application that uses a datagridview. When I access the EditedFormattedValue of a cell while it is in edit mode, sometimes, but not always, the whole cell turns black. Is this a feature of the datagridview, perhaps some sort of validation feature I need to turn off? Also, changing the background color doesn't remove the black background for me.
View 1 RepliesDesktop App / DataGridView And ComboBoxCell
Mar 22, 2010I've been programming for a while now and I have a Datagridview which is databound. It pulls up a list of my line items and that works fine. So I have:
OrderID, OrderType, OrderNumber, OrderDescription
Anyhow... these fields all come from the OrderDetails table. I have another table, AllOrders, where one OrderID can have multiple OrderNumbers.
What I need to do is:
1.) The OrderNumber column should be a dropdown list of all OrderNumbers from the AllOrders table where the OrderID matches.
2.) This column should also let users manually type in a value and it saves it to the list.
3.) When the user clicks a save button on the form I need to be able to reference the values from each row to save the selected value to the OrderDetails table.
I thought this would be something rather simple... and I've been pulling my hair out for days. Sometimes I can get the dropdown to load the OrderNumbers correctly, but I can't add one. I can get a ComboBox cell where I can add a value to the list, but I can't load the existing OrderNumbers, etc.
VS 2010 DataGridView ComboBoxCell?
Dec 28, 2011I have a Windows Forms DataGrid currently filled with text.What I want to do is have a ComboBox appear in a cell when the user enters it.After the user has chosen their item from the ComboBox list I want the ComboBox to be removed leaving just their selection as text in the DataGrid, when they leave the cell.
View 11 RepliesComboBoxCell Won't Show Immediately In Bound DataGridView?
Nov 20, 2009As part of a user interface I'm designing, I'd like the user to encounter the following: when the user wants to edit a value in a cell, the cell in the DataGridView is replaced by a DataGridViewComboBoxCell. This is working now, however, when the user enters the cell (edit cell) the edit cursor stays there, and the combobox won't show. When the user leaves the cell, the Combobox shows, and after again entering the cell and clicking on the combobox, the dropdown finally shows. So 6 clicks are necessary, and I'd like to reduce this to a maximum of two clicks.
Using VB.Net on Visual Studio 2008, with .net 3.5
This is my code:
Public Class Functions:
Public Sub ComboBox(ByVal source As System.Windows.Forms.BindingSource, ByVal MainView As System.Windows.Forms.DataGridView, ByVal valuemember As String, ByVal displaymember As String, ByVal row As Integer, ByVal column As Integer)
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Set A Single ComboBoxCell In A TextBoxCell Column Of DataGridView?
Jun 21, 2010I have a DataGridView with two columns defined like:
Dim col As New DataGridViewColumn
col.DefaultCellStyle.BackColor = Color.FromArgb(&HFF)
col.Name = "Description"
[code].....
DataGridView / ComboBoxCell - ComboBox Display Nothing Until It Is Clicked On And Selected?
Mar 9, 2011I am using vb.net 2010 and winforms and DataGridView. The DataGridView has a DataGridViewComboBox column. When I show the form with the DGV it shows this and empty grid but the column that contains the ComboBox shows the first item on the dropdown list. How can I have the ComboBox display nothing until it is clicked on and selected?
View 1 RepliesVS 2010 Click DataGridView Cell - Change Its Background Image
Mar 9, 2012I'm trying to make a visual map editor, and figured that a DataGridView would be the best way to go. I would like to make it so that you can click one of many buttons to set which new image the grid cell will be set to when you click it. I've set up pretty much everything except that I can't figure out how to set the background image of the cell that I clicked.
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Bitmap Background Becomes Black Upon Saving To JPG
Dec 7, 2010I have a little piece of code which saves a certain Bitmap to a JPG image. The Bitmap is "composed like this" ( Ppiechart is a picturebox):[code]So After it is declared I start to do some drawing on this bitmap. And then I want to save it like this:[code]So this saves the image. But the problem is that the background of the image turns black when I open the file on my PC.The background of the Bitmap in the program itself is white. So does anybody have an idea what may cause this? Do I have to declare a color for the "mybitmap"?
View 4 RepliesMake System Background Black?
May 23, 2010I want to make my system is the only system in the windows the user Can use it like games
since i want to make the background of my system is Black [code]...
.net - GDI+ Image Conversion From Metafile To JPEG/GIF Results In Black Background?
Jul 8, 2009So i am converting a metafile (EMF to be exact) to a jpeg or gif (doesn't matter as long as it's compatible with browsers) and when I do the conversion, all of the transparent pixels turn black. I have no idea how to do this in GDI+ but here is the method I am using to save the file:
Dim Img As System.Drawing.Imaging.Metafile = New System.Drawing.Imaging.Metafile(stream)
Img.Save(Server.MapPath("/FileName.gif"), System.Drawing.Imaging.ImageFormat.Gif)
All Controls On Transparent Background Form Are Black At Start Then Changes Color After Focus
Feb 8, 2009I have a form with transparent background (using png file).All controls placed over it becomes black at start then they change there color and comes to there original state on MouseHover. Its not the transparency keys problems since the transparency key color is different that controls back color. What can be the problem?
View 5 RepliesClick On A Button Its Background Color Changes And Changes Back On Next Click
Jul 13, 2011I have a basic window that has 20 buttons (One, Two,.....,Twenty).Currently if you click on a button its background color changes, and changes back on next click.I'm looking for a way to make it so when the mouse button is held down I can drag across the screen and it will change every button I hit.Disregard the "Shut Down", "Restart", "LogOff", "Clear", and "Invert" buttons. This idea doesn't apply to them.
View 5 RepliesPopulate Each ComboBoxCell With Different Data?
Dec 12, 2011i have two DataGridViewComboBoxColumn that i add at run time i need the items of the first DataGridViewComboBoxColumn to stay the same in all the rows of the gridview but i want the items of the second DataGridViewComboBoxColumn to be different from row to the other depending on the selected item of the first DataGridViewComboBoxColumn
I HAVE SUB TO PUBULTAE DATATABLE AND SET THIS DATATABLE TO COMBO DATATSOURCE.I NEED PUBULTE COMBO 2 VALUE BY PARAMETER FROM COMBO 1 TO PASS THIS PARAMETER TO STPRED PROCEDURE AND RETURN DATATABLE SURCE FOR COMBO 2
HOW FILL COM 2 PER ROW Dim ID As String = COMBOBOX1.VALUE dt = DB.returnDataTable("SP_UNITS_NAME", ID)
HOW BIND DT TO COMBOBOX 2 FOR EACH ROW IN DATAGRID
Form Stays On Top When Click In The Background
Nov 9, 2009Okay so I'm making an on screen keyboard, and was wondering - when I click something in the background, my form stays on top, how can this be accomplished? Can someone point me in the right direction?
View 5 RepliesChange The Background Color Of A Cell When Click On It?
Jun 13, 2011Is it possible to change the background color of a cell when I click on it?
Also, is it possible to set a property so that when a cell is clicked on once it already has the focus that the 'edit' text feature doesn't let the user to change the text?
Creating Player Turns?
Mar 28, 2009Another newbie question i am afraid, I have created a game of pontoon it generates the numbers into an array and the assigns the values to the labels. this all works great.however the bit that i am stuck on is creating a player turn as each label has a name lnlP1Card1 to lblP1Card5 for player 1 and lblP2Card1 -5 for player 2 etc. I tried to create a set of if statements that checked a counter and then if the counters value matched the if statement the players turn moved to the next player. sample
If pcount < 5 Then
Do
If pcount = 1 Then
[code]....
Make A Program (in Background) Preform A MOUSE Click?
Mar 11, 2010How would i make a program (in the background) preform a MOUSE click?
View 14 RepliesNullable(Of Double) Property Turns Nothing Into 0.0?
Mar 5, 2009I was under the impression that any time I set a Nullable(Of Something) to Nothing, it will take the value of Nothing.In a class, I have;
Private _something As Nullable(Of Double)
Public Property Something() As Nullable(Of Double)
Get
Return _something
End Get
[Code]...
In my page, using this class I set Something = Nothing, but as I step into the Set method, value = 0.0.Am I doing something wrong here? Or do I just not understand Nullable types yet?
VS 2010 Form Turns Into Code?
Feb 7, 2012Every once in a while, my GUI form will turn into a code. So in the right panel (Solution Explorer), I click on Form2 to edit my gui, but instead a blank editor appears.Yet when I am debugging the application, everything is normal and I can see the GUI fine.
View 2 RepliesForms :: Change Background Image When Mouse Double Click?
Aug 22, 2009Im building a software but look,,I have some images at my resource folder..I cant make it when the mouse double click the form the background image changes,,,I can make one image to change when u double click the form..example:
Form1_MouseDoubleClick
Me.BackgroundImage = My.Resources.Image1
Now I want to make it to change more images within the resource folder
Forms :: How To Toggle Button Background Colour On Event Click
Jul 23, 2009i know how to toggle a button background color when i click on another button? That means i have two buttons on a window form and when i click on button A, button B will toggle its own background color based on the click event in button A.
View 4 RepliesGradient Background Of Listbox Selected Item On Mouse Click?
Oct 31, 2009[code].....
View 1 RepliesImport A Image With A Red Back And The Red Disapeers And Turns Transparent?
May 18, 2010i have a program were you import a image with a red back and the red disapeers and turns transparent using this code. But it uses a bitmap as a image holder and bitmap does not support transparacy. So i need a image bitmap so i dont know what else to do
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Make A Programe That Turns Off Computer After A Set Amount Of Time?
May 5, 2009How to make a programe that turns off the computer after a set amount of time.
View 13 RepliesChecking For Duplicate In Listbox Item Turns Out Weird Error
Apr 21, 2011I'm trying to add a string to a listbox if there is none exact string existed inside, but it turns out a very weird error. Look at this.
On form_load, I have this:
AddHandler Server1.OnUserLoggedIn, AddressOf HandleUser
And then,
Public Sub HandleUser(ByVal username As String)
'Here, you handle adding the text to a text box.
Me.Invoke(New PrintMessageDelegate(AddressOf AddUser), username)
End Sub
[Code] .....
The output is when I connect the first client, it works fine. But, when I try to connect the second client, it prints out three times both the listbox1 item and the txtDisplay. It's like get caught in loop, but I have tried other kind of loops like for each and other string comparison too, still work that way.
Datagridview With Progressbar And Background Worker?
Jul 13, 2011I have 2 forms (let's call them form1 and form2). Form1 has a datagridview that is populated by a combobox, when the selectedindex changes the datagridview is re-populated. Form2 is a small blank form with just a progressbar on it (progressbar1). Right now if I make Form2 visible when selectedindex is changed the marquee on the progressbar doesn't really move and Form1 is essentially "locked up" until the records are done loading into the datagridview.
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Delegates, Background Worker And DataGridView?
Jun 5, 2011I have a form with a DataGridView control. When i load the form, i fill the control with several records. Now sometimes it can be 1 to 30, but sometimes it could be 10000+ records.Now, what i'm trying to do is to grid.AutoResizeColumns
As you can imagine, when i have 30 records it goes like the Flash, but the more records, the longer it takes; obviously..So, for now i have a ugly label saying "WAIT PLEASE" and waitcursor=true; Yes, horrible, i know...
So i tried to do the following:I created a form called frmWAIT, and have a timer in it that shows 4 pictures at 250ms intervals, to make some kind of animation.In my Primary form, i added a BackgroundWorker, and in the DoWork Event, i tried to grid.AutoResizeColumns and it won't do it.
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Populate Datagridview Using Background Worker
Mar 29, 2009I hope someone can guide me in the right direction. I'm using VB2008 and I have been writing some small apps just to get me started in programming (I'm pretty much a newbie) and all was going well until now. I recently was experimenting with an n-tier style application. My application is as follows:
1) SQL Server 2008 database
2) Data Access Layer
3) Business Logic Layer
4) WCF Service
5) Winforms Client
My Winforms client retrieves data from the database via a call to a WCF service. I want to make the UI more responsive and to prevent it from locking up when its pulling down data from the database and populating a datagridview. I have looked at the background worker component but I am unsure how to implement it properly. To currently populate the DGV I simply use the click event of a button, as follows.
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DB/Reporting :: Export The Current Record To Crystal Report Which In Turns Converts It To A PDF File?
Aug 19, 2009I have a database app where on a button click, I export the current record to crystal report which in turns converts it to a PDF file. Upon application startup, I export one record into PDF just fine but when I move ahead to the next record and I click the export button, the new PDF file that was exported is now blank. If I restart the app, I can then export the one record again but any subsequent record will export to PDF as a blank PDF file.
To sum up:I can export one record once using the below code snippet but when I try it for a second time on another record, I get a blank PDF file (only the crystal report formatting is in the PDF).
[Code]...