Removing Last Row Datagridview?
Dec 11, 2008
Okay I have an unbound DataGridView control which users enter as many records as is required. However I have some validation running which checks all cells to ensure data has been entered, however as you know, as soon as data is entered into a row, another appears, well I need to remove this row.
I can't use
vb
DataGridView1.Rows.RemoveAt(DataGridView1.Rows.Count - 1)
As the row has not been committed, therefore it can't be deleted
Also I need the 'enable adding' on, as without it rows will not appears.
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Mar 10, 2009
Is it possible to remove from a datagrid view very first "column" i.e. the row selector and also to remove the ability to reorder the columns ?
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Feb 12, 2011
What I want to do is remove the errortext once the data input is valid. I have a code that works perfectly fine. I had run it a number of times and its working properly the whole time. But after I restarted my computer, there seem to have been an error.
[Code]...
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Dec 5, 2009
Is there any way to remove the focus from the current cell after edit when I click the row header? I have tried various methods; repainting the row, cell, moving focus to other cell but the caret still remains in that cell.
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Jul 26, 2010
I have this code:
If kivertekhossz = 2 And dgvszamlatukor.Rows(ind).Cells(1).Value.ToString.Length > 2 Then<br/>
dgvszamlatukor.SelectedRows(0).Cells(0).Value = My.Resources.S_CLOFOL<br/>
[code].....
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Nov 10, 2009
I have a userform which allows my users to go through numerous comboboxes to select a combination of items they want displayed in a datagridview. My datagridview is populated from sql queries to my database(s), depending on the choices made in the comboboxes. The first column has checkboxes so my user can pick which rows they want to keep. Once they've chosen what they want, they click a button to save those rows into a seperate sql table.
All this works well, but here's my problem. After they click the button to save to the table, or another button which simply clears the datagridview without saving to the table, I want to clear my datagridview. While it seems to work, after all my comboboxes are cleared, and I go through another iteration of choices, and I display all the rows again in the datagridview, I get a second column of checkboxes.
Right now the checkbox column is added right before the datagrid's datasource is set. I've tried adding this column outside the subroutine that populates the grid, but it doesn't work.And I've tried numerous ways to delete this column so it will be regenerated when the datagridview is repopulated. Different things either give me errors or bomb when I compile.how to remove a checkbox column from a datagridview for good?
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Oct 26, 2011
The user picks x amount of scenarios from the combobox, and x amount of columns appear in the datagridview. If the user changes the number of columns from x amount to y amount, the columns should be added/removed respectively but currently when y amount is chosen x amount of columns are in the datagridview.
I'm not sure how to do this, I've tried using an IF statement under the .SelectedIndexChanged event but the code adds columns until it reaches as high as it can go, then pulls an error saying too many columns.
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Dec 8, 2011
I have a datagridview binded to a list of objects... I have a column named Selected containing a checkbox. When these checkboxes are checked and a button is clicked, I want those particular rows to be removed. I initially set it out to iterate through the grid's rows and RemoveAt(SelectedRowIndex) but of course when it removes an object from the List of objects at the selected row (IE Row 1, 4 and 6), the list indexes change and it fails to work properly when it goes to remove the next row since Row 4 is now row 3 in the list...? What is the best way to do this?
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Nov 2, 2011
I am using a DataGridView bound to a BindingSource which is itself bound to a List of objects. This all works well until I remove objects from the list. If I am scrolled down to the bottom of the DataGridView and then remove a bunch of items from the list it is bound to it generates a DataError exception because the length changed and the rows I am looking at no longer exist... I changed my code to handle that error, but now instead of popping up a message it SLOWLY erases the data in each of the newly invalid rows at the end of the table (I think each time it does one it generates a new DataError, which is why it is so slow).
How do I prevent this? I want to be able to dynamically (and programmatically) add and remove items from the table without the possibility of this error... I assumed this would be handled automatically as part of the data binding process but I guess not.
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Sep 7, 2010
I'm having a variable, which contains characters with tab character in between two words. remove the Tab character.
For Ex;
Input string "Word<tab>1234"
I need the output as "Word1234"
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Feb 13, 2009
I have a class that was originally compiled as a separate .dll file and included in the project properties as a file reference. I want to take the class code and embed it into a module within the project. When I do that and remove the reference to the original .dll file, the build fails because it can't find the class.
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Sep 12, 2011
So i would like it when button 3 is clicked it will remove the selected item from listbox 3
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Aug 26, 2010
I am still very new to VB. I am having trouble working out how to remove lines within a rich text box, based on the next new entry into the rich text box.
For example:
rtbClient (the rich text box) already has the lines:
long cat is long
he really is
long cat is long
Now, if the next NEW entry into the rich text box is "long cat is long", then the new "long cat is long" string would be ignored because the line previous (and only the previous line and not all lines that already exist) is exactly the same. Note, I know of the Me.rtbclient.Lines = Me.rtbclient.Lines.Distinct.ToArray code, iv tried playing around with it with no luck.
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Jul 22, 2011
I can't get a zero into a text-box, what I'd like to achieve is this: if the textbox is zero, then I want it to remain as a blank, until I enter value to that field.Actually When I activate the field via some other control, then I Never wants to display "0" zero in Textbox Fields, before operation done. By default which comes from the multiplication operation (txtUnitsPrice.Text = d1 * d2) into the textbox field. I have three Text box fields, i.e. Unit_Price, Unit_on_Order, Units_Price.
Unit_Price=0 or some time it have default value, i.e. 25, which display ok, but not the below field.
Unit_on_Order=0
Units_Price=0
[code]....
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Mar 22, 2011
i tried to read html contents by striping html tags in a string.when i try to print that string i got - character. how to remove this character?
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Feb 1, 2010
I am trying to search through listview in VB.net 2008. It works fine with small list, but when the list is big ( around 25000 rows), if I search multiple items , it fails saying that index is not valid. Obviously what I understand is , it it tryiong to remove an index does not exist. But I am unable to figure out where exactly it is going wrong.
PS : while it is doing search through the entire listview, I am incrementing index = index+5 becasue I want the next 5 rows to be in the selection state as well.This is the code Private Sub TextBox1_KeyUp(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles TextBox1.KeyUp If (e.KeyCode = Keys.PageDown) Then
[Code]...
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Oct 1, 2010
I am Appending new Elements into XML file which is creating additional xmlns attribute and cannot be removed. i tried most of the common options here's my code
[Code]...
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Apr 18, 2011
I am having the following string builder as msrtResult, which is quite long:
mstrResult.Append(rtbResult.Text).Append("})})" + Environment.NewLine)
How can I remove the last "," from mstrResult Now? (it is in the middle of that mstrResult and it is not the last character of the whole string since I am appending strings to it)I should do it before adding the newline.
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Jan 30, 2009
Having opened cmd.exe by using a process, how can I now open it without a Titlebar or borders?
hrivate Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim p As New System.Diagnostics.ProcessStartInfo
p.FileName = "cmd"
proc.StartInfo = p
proc.Start()
End Sub
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Jul 8, 2010
I'm trying to remove a sub string after the last occurrence of a ".". [ocde]...
When I debug, I get an argument out of range exception for the second, counter, parameter; dummy in this case. I'm not sure why; the total length of my test string is 72, when debugging, the dotIndex is 68 and the length is 71, so I'm within the bounds of the string.
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Jul 5, 2010
At the beginning of a VB .NET function I remove an event handler and add it again at the end of the function because the function's code would trigger those events and I do not want them to trigger for the duration of the function. This usually works, but I have run into a few situations where the event still gets called even though I have already removed it. Sometimes removing it twice at the beginning of the function fixes it, but other times no matter how many times I remove it, it still fires.
Edit:The code is in a Form that has a virtual mode datagridview. I want to run some operations that will trigger the CellValueNeeded event for the datagridview without that event being fired (because it will interfere).
Public Sub DoEventRaisingStuff()
RemoveHandler grid.CellValueNeeded, AddressOf grid_CellValueNeeded
'Do things that would trigger CellValueNeeded
AddHandler grid.CellValueNeeded, AddressOf grid_CellValueNeeded
End Sub
Removing the handler multiple times does not prevent the event from firing, so it doesn't seem to be added multiple times somewhere else by accident.Is there a way to find out what event handlers are active?
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Jun 1, 2009
I have this code to delete a registry key:
Private Sub RemoveCurrentKey(ByVal name As String)
Dim key As RegistryKey = Registry.CurrentUser.OpenSubKey("Software\", True)
key.DeleteSubKeyTree(name)
End Sub
But it simply wont remove the key tree, How do I remove the whole tree?
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Jun 28, 2009
I've been working on this program all week and I've been able to finally get it to work except for one problem. The program is suppose to parse strings from a text box to a list box and then from a list box to a text box using the users choice of delimiters. I can't seem to figure out how to get the last comma off the end of the list. ie cat,dog,elf,It seems it should be easy, but since I've worked on this program so long I believe I can't see the forest for the trees. I don't want for you to do my work for me.
[Code]...
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Oct 16, 2011
How can all Child controls be removed at ones, instead of removing them one by one with this code below?
FrontPictureBox.Controls.Remove(Titel_Label)
Hendri Bissolati noviceprogrammer@vodamail.co.za
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Apr 20, 2011
I'm trying to remove all children (and sub-children) of a Grid in WPF (I'm really new to the whole WPF business). Is there a good way of doing it programmatically? I need to do this so that I could leave an empty canvas (Grid) at one point and draw other stuff on it.
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Nov 8, 2010
Is there any function in vb.net that removes all spaces in a string. I mean a string like ' What is this' should be 'Whatisthis'
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Dec 1, 2010
is there a way to remove all the tabs on a page so that i can just bring back the one i want? this is for VB 2008 by the way.
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Feb 27, 2010
I'm dynamically creating x number of textboxes on my form. Once I have done this and the user has done some stuff with them they need to be able to remove all of these textboxes to start again. I've written this code to go in a button, but it only gets rid of two of the textboxes at a time rather than them all in one button click (so it takes like 8 button presses to clear all of the textboxes on the form). Can anyone see the problem?
Code:
For Each ControlObj As Windows.Forms.Control In Me.Controls
If TypeOf ControlObj Is Windows.Forms.TextBox = True Then
[code].....
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Apr 11, 2011
While being in a base class, I want to remove a base class's object's event that is bound to a function in the child class. A little more detail is, there is a grid control declared in the base class, this grid has a rowselected event which the child class catches. Now staying in the base class I have the access to the grid control object and I want to remove the event handler that is catching its rowselected event and instead bind it to my own eventhandler (inside the base class).
I have been trying this code, its just a simulation of the original code so that things remain simple:
Imports System
Imports System.Reflection
Module Module1
[Code].....
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Oct 14, 2009
Is there a way to remove 'this' item from a collection, i.e the one I'm working with, or do I always need an index?
For each ThisItem in MyCollection
if a=true then MyCollection.Remove(ThisItem)
next
[code].....
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