I have several problems with rows in a DataGridView. Background information: The DataGridView (DataGridViewCalib) is in one TabPage of a TabControl, some columns of the DataGridView are automatically DataGridViewCheckBoxColumn as the DataSource have some colums which are Boolean. This is a Windows Form written in VB.Net with Visual Studio 2008. The user loads an input data file.
1) At first arrival in the TabPage, ShowDataGridViewCalib (code below) is called. All rows are then shown in the DataGridView, despite the code saying that some rows should not be visible. Breakpoints in the code show that the code do arrive at the Rows.Visible = False events. Despite all rows beeing shown a Watch in the debugger shows that:
There are two alternative ways of handling the rows in the code. The first attempt (commented away here) is probably the "nicest".
I have a datagridview (DGV) bound to a table. I am adding an unbound column which is a button. I want to be able to programatically change the text of the button and header between "delete" and "update" depending on selections made by the user. I can't find a way to access the text property to do this.
I understand the properties to change a button from visible to invisible, but I need to be able to have two buttons alternate visibility when the first button is clicked.It's for a game. The first button is to "Begin Game" and on open, the invisible button that sits over it is called "Begin Again" which I would like to only appear once the Begin Game button has already been clicked. This would then trigger the "Begin Game" to become invisible.
I have 2 group oxes of equal size on top of each other. I would like to click a button and show 1 and hide the rest. but even when i just use ''grpBxSalads.Visible = True, for the second button, it fails to show the group box. [Code]
I have a graphical button named ba1(blue arrow 1), ba2, ba3, etc to ba8 which coincides with questions on a sig pad 1-Qmax(=8) so that the clinician can see which question the patient is answering at the time.I need this For statement to work but it is giving me syntax errors and nothing much else. I am guessing it doesn't like placing a string and integer together. I have tried turning the int into a str and it balks.[code].....
I am populating a datagridview with data from a table and some unbound columns This is a large table and I want the form to fill the screen and the datagridview to fill the top half of the form. To do this, I have put a panel on the top and a panel at the bottom.I have anchored the dgv to the top left and docked it to the toplumnHeaderHeightSize is AutoSizehe issue is that the ColumnHeaders are not visible unless I click on the restore down button on the top right part of the screen
i have a DataGridView bound to a table that has 22 fields in it. In the datagridview columns, the first 2 have the visible property set to false and the last 7 also set to false. This works since there are 13 columns displayed in the datagridview when the program runs. Here's where my issue come in. When I do the following, Console.WriteLine("Column count = " & DataGridView1.Columns.Count.ToString()), I get the expected "Column count = 22 in the output. However, when I do Console.WriteLine("Visible = " & DataGridView1.Columns.GetColumnCount(DataGridViewElementStates.Visible)), I get 20 instead of the expected 13 that actually have the property set to visible.
I have a class that inherits from DataGridView. However, when I create a new instance, set the position, width and height and then run the project, the datagridview is not rendered.Is there something else I need to do the make the datagridview become visible?
I do not know what this term in the computer. but I try to send pictures, might be able to know what I mean.I want to eliminate the columns that I marked in the picture.how? what can be set for width 0 ?
I was looking for some better way of coding to populate all text boxes and make them visible once a button is clicked. I have a letter like format on a page with labels displaying address, name etc and it was recommended that on this page some of the information should be able to be edited. The idea I had was to keep the labels displaying the information but then when the edit details button is clicked the labels disappear, text boxes will appear and be populated with the same text as the label to allow the user to edit the details.
I seem to repeating lines of code but changing one thing each time on page load Dim Sname As String = Request.QueryString("Name") lblStuName.Text = Sname tbStuName.Text = Sname tbStuName.visible=false [Code] .....
On edit button tbStuName.visible=true tbAddress.visible = true etc..
On the save button sqlStatement = "UPDATE StuTable SET Name = '" & lblStuName.Text & "', Address = '" & lblAddress.Text My code seems very repetitive in many parts, I was looking for a better coding style to do this.
A DataGridView in my VB.NET 2008 program contains over 15,000 rows. I loop through the rows, totalling groups of rows and appending 'total rows' and one 'Final total row' to the DataGridView. That works fine. I want to initially hide all rows except for the total rows, giving the user the option to show all 'detail' rows. If i place the statement << dgvTitleCounts.Rows(intRow).Visible = False >> in the loop, execution time increases by three minutes and that is unacceptable.
I see two options: (1) find a faster way of making all rows invisible; and (2) place the total rows in a separate DataSet and bound DataGridView.
I have a access table column ("d") and rows with value Datetime. How can I ..... when form load make the datetime now ..visible. What is the code for making the rows with datetime value now start with index 0.
i have a datagridview which am display some data and i have also cell formating event which according to that data that are populate am changing the row format and one of my columns are of type image and am load an image depending on the row values.day by day the data in are become larger and when am trying to load that data to the datagridview is taking much time in order to display that data to the user.
1st ,when the event of cell formating is fired, is fired only for the visible area of datagridview rows? or is making changes for all the rows in the datagridview.
2nd , is there any way to load only data that are visible in the datagridview area and when the user scrolls down or up to query also the rest?
I've got a form that populates a DataGridView from an excel file. How would I filter that DataGridView so only the search criteria are visible. I need to search through 2 columns by all rows. I'm not very good with datasources I guess and can't figure out what all I need to accomplish this. DataSets, DataViews, DataTables.
The problem - The btnPause doesn't pop up until AFTER the thread sleeps, but the other two buttons works correctly. What the heck is going on? Here, I'm using the Sleep to simulate doing external events yet to be programmed.
I have a form which won't open properly under certain circumstances if a particular Button is set to visible = false. Under the same circumstances if the Button is set to visiblbe = true the form does open properly or if the line of code at a certain place where it is set to either visible = true or visible = false is commented out or not there then the form opens properly. If any one of the 5 phases on my form are turned on then the problem doesn't ever occur but if none of the phases are on then the problem does occur. I just found a fix for the situation but I still am not clear about what exactly is going on.
I am running a website for a F1 racing game, where users can submit their laptimes and compete with each other for the fastest time.
I am now trying to have my website create an image of the top-5 users every... 5 minutes or something, and copy it to the webserver somewhere I can link to. This way the image under that link will update with the latest information every 5 minutes.
To layout the times (these also include the position (1 to 5), the username, the platform, the time of course, and some more details) I am using a DataGridView. I could take the long route and layout the specific 'columns' manually, but I thought using a grid was far easier. I simply set some properties of the grid to make it look nothing like a grid (basically hide the column and row headers and grid lines and give everything the same backcolor). Then I load the times into the grid, and take an image of it using the Control.DrawToBitmap method.
This works fine, but it returns the entire grid. This is a problem because I made the grid extremely large (5000x5000) so that it can always accommodate the times regardless of the length of the usernames. So, the image I get is 5000 pixels wide while it only contains data in the first 500 px orso.
I am currently using the GetRowDisplayRectangle and GetColumnDisplayRectangle methods to figure out the part of the grid that actually displays the times, and use that to cut the image down to the portion I need.
But here's a problem: these methods only return something when the grid is on a form that is currently being shown! I am already giving the grid a parent form (even though I am just creating it in memory and it doesn't need to be displayed anywhere) because otherwise the data wouldn't load, but I was never showing that form. Now it turns out I do need to show the form, very briefly, in order to figure out the area that I need to take a snapshot from.
Remember that this is all happening on a webserver, so I'm not absolutely sure if this is a problem. Is it ok for a webserver to have a form popping up and down every 5 minutes? Or will this cause problems? I honestly don't know but I don't think it's a good thing. Moreover, it also pops up on my own machine when I'm testing, and it's damn annoying.
So my question is basically twofold:
1. Maybe I should ask this in the ASP.NET forum, but is it a problem to show a form briefly every 5 minutes?
2. Is there any other way to get these Get...DisplayRectangle methods to work without having the grid on a physically visible form?
Having an issue with my data gridview. I've set the visible property of the ID column to false, and in the designer the column is hidden, yet it still shows up when i run it. Now if i set it to True it shows the column twice.
In my space invaders game, you press start, which creates 15 pictureboxes. When I hit the spacebar, a bullet moves to the top of the screen. What code would allow me to make a picturebox invisible that isn't named yet?