No Row At Position 17 - Pivoting A Datagridview?
Nov 21, 2011
I'm getting the error on the following line of code: dr(y) = ds.Tables("Original").Rows(y).Item(i)I got the piece of code from the following website: [URL]..I think it's because there is no row at position 17... I wonder why... but I'm not sure how to include a piece of code where it checks to see if the row or column exists. How do I check to see if the row/column exists? It's probably really simple, brain isn't working properly at the moment unfortunately.
[Code]...
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Dec 12, 2011
I have a datatable that contains 8 columns. To make this more presentable I have managed to pivot three of these columns. That will not do since I then loose 5 columns of information. To overcome this problem, I thought of just joining the two tables in vb.net.This seems more difficult than expected. LINQ are hard to learn compared to SQL. I have tried to pivot the query in SQL but am not able to.Here are the query:
"SELECT t1.Journal,t2.Kunde,t2.Kundenr,t2.Lokalitet,t2.Lokalitetnr,t2.Analyse,t2.Positive,t2.Totalt " & _
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May 28, 2011
I am not attacking this in the correct manner. See this code snippet ' Where dgv is the form DataGridView
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Mar 30, 2010
How can I get the position of a certain cell of a datagridview. To be specific I don't want the mouse coordinates. Suppose I have a datagridview with Name (ReadOnly), ID and TransDate columns and I want to popup a tiny lookup form when the mouse is clicked or Enter button is pressed when the focus is upon the Name column. The lookup form should openup exactly upon the Name column of the selected row.
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Jan 3, 2011
in my form, I have a DataGridView and TreeView apart from other controls. Now, the data shown in the DataGridView is also displayed in the TreeView. What I need doing is that when a node in the TreeView is selected, the corresponding row in the DataGridView needs getting selected for further action.I used some logic to determine the DataGridView row. But, I am unable to select the row. When I use the DataGridView.Row(index).Selected function, the row is selected, however, the row index does not change.
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Apr 1, 2010
I was wondering if there is a way to keep the same scroll position in a datagrid view as the app jumps around to various rows (driven by the user selecting different timestamps or address). After the jump happens, the horizontal slider moves all the way to the right, but I want it at the same position as before the jump (or at lease go all the way to the left).
I have tried numerous things (datatable.AcceptChanges(), etc) but haven't been able to figure it out yet.
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Jul 19, 2009
I am now using a datagridview that uses just 1 col and 1 row, but is set such that it has a large display width to display a lot of graphics.
The horizontal scroll bar is active to help me view all the data, but the scroll bar defaults to the LHS.
How can I make it default to the RHS?Additionally, when I move the scroll bar, the displayed data seems to get corrupted - do I have to re-paint the graphics every time the scroll bar position is changed?
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Jan 13, 2010
What I am trying to do is sort a datagridview and remove a row from its sorted position to the 1st row.
The problem I am experiencing is as follows:
in the source below, when the code runs "MeanRow" is populated with what is required. As soon as Rows.Remove() executes, the MeanRow datarow is lost. Why would this be if I'm declaring a new variable and simply setting it?
Code:
MeanRow = r
TabGrid(dgv.Name).Datatable.Rows.Remove(r)
Code:
Private Sub dgv_Sorted(ByVal sender As Object, ByVal e As EventArgs)
Dim MeanRow As DataRow
[Code].....
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Apr 5, 2011
I am working DataGridView in vb.net08.The intresting task is ,When i move the Horizontal Scrollbar in DataGridView from Left to Right ,the First two Columns should be stable and moving starts from 3rd Column.Means If i moved at end of the right side but the first two columns should be visible. When i move the scroll bar the first two columns should not be disterb.Is there any property like Scroll bar position should be starts ??I tried the " FirstDisplayedScrollingColumnIndex" property but it only starts the Scrollbar from giving column index after moving the scrollbar the first two columns are moving into left side.
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Oct 17, 2009
I'm writing an application for seat reservations. I use a DataGridView to represent seats. Each free seat is coloured in green and occupied seats are in blue.DataGridView is populated with names from database and user could add a name to a seat choosing from a list.Moreover the user has the possibility to move a name from one seat to another - not occupied via drag and drop operation.Eveything works well, but when moving a name from one cell to another I have to position the cursor over a cell that is one row above and four columns on the left of that one I choose.Which is the reason? Here is the code
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Apr 10, 2008
On one of my forms i have a datagridview binded to an Access database. It displays only first and last names of my customers in a datagridview.What i want to do now is, when i double-click on one of the customers another form will open and display details for this customer (detailed view - textboxes).
What i have accomplished so far is that when i double-click on a customer in datagridview a form opens with details (linked to the same binding source as datagridview). But the problem is that it always opens the first record even if i dobule-click second or third in datagridview.I don't know how to bind these textboxes with current datagridview position?
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Mar 10, 2010
I have a form and in that form is a datagridview listing information from a table in a database. The datagrid is setup as read only and the user is unable to move the columns around. The purpose of the datagrid is to allow the user to select entire records and press a menu button that does some action on them. To make it easier to use the very first column in an unbound data column that I fill with a number representing the row count so 1,2,3,4.... this makes it easier for the user to count how many rows he has selected.
The problem is that the unbound column moves to the last column in the datagrid at random times.This only happens in development not after the application has been deployed. Its annoying because lets say I go in to add a label or change a menu item on the form that has nothing to do with the datagrid I have to make sure that the unbound column hasn't moved.Has anyone else had this problem mixing bound and unbound columns in a datagridview.
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Aug 24, 2009
I have looking for a tutorial or class that demonstrates more than a trivial example of saving a windows position on closing. The ones I have found don't seem to work on all systems because of:
1. Multiple monitors. (and resolution between those monitors)
2. Toolbar size and position (toolbar is only on the primary monitor, well sometimes)
3. Sometimes the programs dont open on the right monitor they were closed on.
Is there an extensive class or tutorial on all the stuff a programmer needs to get right to have a window size and position persisted between executions?
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Dec 5, 2010
I am using the following code to populate data in Textbox1:
[Code]...
I have few functions assigned in TextBox1_TextChanged event. The problem i am facing is this event is fired twice, once after the Fill command and another after the Position command whereas i want the event to fire only once after the Position command. What should i do?
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Mar 9, 2010
I also have a function that returns ALL tiles on the map and they're X, Y position. How could I find out which one is closest to the position I specify? I can't figure out how to go about it. how to implement it with this. Heres a MADE UP example if what I'm trying to do:
Dim MyPosition as New Position()
MyPosition.X = 400
MyPosition.Y = 400
Dim tList as New List(Of Tile) = MyMap.GetTiles
Now, I can already do the stuff above, but what I need to make is something like this:
tList.GetTileClosestToPosition(MyPosition)
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Mar 24, 2010
I have two forms: Main and Options.Main can be moved around the screen (like a normal window).When the user clicks a button, the Options form opens up and the Main form HIDES.How do I set the Options form to open in the exact place that the Main form was last on the screen (to give it the effect the MAIN form never went into hidding)I was thinking to set Option form's StartPosition to Main's current position, but I don't know the syntax for that or if it's even something you can do.
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Jul 2, 2011
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Is it possible to give like this m_qty = ds_uqc.Tables(0).Rows(0)(4)?
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Dec 15, 2011
I'm Pilipino and im new here . and this is my first time making a program . I used VS2008 my database is access 2007 .. I'm making a program for our hospital.. Im using Listview as my data table. when i delete a row or information . The error is There is no row at position 0 .
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Oct 27, 2011
i have a datagridview. On right click it shows a contextmenu but it is always in the right upper corner. I want it so that the menu appears on the cell where user right clicks. It could be Cell 1 or two or whatever.
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Sep 1, 2010
I have a datagrid named as dtagrdScaleoffinance with 5 rows. Now I want to display the current row in my textbox controls on my MouseUp event.
Here is my sample code
Private Sub dtagrdScaleoffinance_MouseUp(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles dtagrdScaleoffinance.MouseUp
Dim rc As Integer
rc = dtagrdScaleoffinance.CurrentRow.Index
getemp(rc)
[Code] .....
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Nov 14, 2009
Okay so i have created my search form and everything works perfectly when you type into the text box the list box is filtered when you selected a name from filtered list box the customer details are shown and when you select a booking id number for that customers bookings you get the booking information however when i try to close to form i get an error no row in position -1 Since the close button on the form takes you back to the main menu this is an issue but i cant see why its doing this or how to fix it.
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Feb 11, 2010
i am trying to populate all the emails in my distribution-list where comms = 'to', when my code reaches this part it gives me the error: There is no row at position 2 since i have 2 emails with comms = 'to' [Code] that i could see is that the for loops twice and strEmails shows the 2 emails but it does no stops there it try a third loop ans it stops at row = oTable.Rows(i) then it gives the error.
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Aug 15, 2011
I have a combobox that is triggering the population of some checkboxes depending on the user mode. For some reason, when I put a MsgBox() at the beginning of the function, it works fine. But without that MsgBox(), I get the error that there is no row at position 0. MsgBox("value changed") '<---- this is the box that clears the error
CODE:
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Jun 17, 2010
How can I get the Y position of the ContextMenuStrip?
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Jul 29, 2009
I have a string like this: mstring = "0123456789ABCDEF"
how can I get the vale at a given position, such as 12?
I know with PHP I can do this:
val = mstring{12}
and it will give me the twelfth value in the string, which would be "C"
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Sep 13, 2009
I am getting the error there is no row at position 6 but there is data at position 6. May I know if there is any better way apart from this that will "see" the correct number of rows in the database and display out the correct rows in the database? So lets say you have one row auto - increment and one column containing the data. Currently now if i delete off the row no 6 and add back the row, the dataset cannot see this row anymore thus giving me the error, there is no row at position 6.
If i take off the auto - increment row and test this method out, i get the same error.
[Code]...
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Mar 26, 2009
how i can find the position of a letter(let's say in a textbox of 50 letters) so then when its position is found i can change that letter by the position?
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Sep 26, 2009
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
TextBox1.Clear()
TextBox2.Clear()
End Sub
How do I make the cursor appear in textbox1 after clicking the button?
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Jul 7, 2010
Given a set of X,Y,Z data points, how would I interpolate a Z value for a known X,Y position? Are there any methods built into .NET to accomplish this. What algorithm could I use?
For example, say I have a graph of X, Y, Z data, and I know the cursor's position. I can find the four closest real data points. I would like to interpolate the z value for the X,Y position of the cursor.
Here is a dummy data set.
(x,y,z)
(-4, -2, 700.065);
(-4, 0, 932.907);
[Code].....
If the cursor was at (.3,.5), could I use the four closest real data points (0,0), (0,2), (2,0), and (2,2) to find the interpolated z value?
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Mar 7, 2012
I am trying to save my scale configurations in the database so first I have to check if it exists in the database.and I am using the code below to do that . however when there is no data in the database I will get an error "No row at position 0" or when the scale number is not there i will get the same error.
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