C# - Checkbox In Datagridview Cannot Be Changed?
Dec 30, 2009
I've created a Datagridview bound to a Datatable. This Datatable is updated by a event to reflect statistical information as it changes (sub second resolution). I have a checkbox to determine if a row is available for other functions and can be toggled on and off normally if my eventhandler is not receiving my updates.
If my bound Datatable is changed, the checkbox returns to its previous state as soon as the cursor or focus leaves the checkbox glyph (not the cell).
How do I toggle the checkboxes without them reseting without disconnecting my eventhandler?
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Dec 24, 2009
Using vb.net and DataGridView in Winforms. What even should I use to know when the checkbox has changed?
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Jan 31, 2012
i am using asp.net for my web application when i click on checkbox inside gridview and after that i check its value on button click it does not show me the exact value.here is asp code
<asp:GridView ID="dgvMenu" runat="server" Width="100%" CssClass="grid" GridLines="None"
AutoGenerateColumns="False">
<Columns>[code].........
and here is its vb version to get its value on button click version
For Each item As GridViewRow In dgvMenu.Rows
Dim MenuName As String = item.Cells.Item(1).Text
Dim chkView As CheckBox = DirectCast(item.FindControl("View"), CheckBox)
Next
i want to check its value whether its checked or unchecked so that i can process its value
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Dec 8, 2011
I have a datagrid that has a checkbox column and it all works fine and dandy except I'm not sure what the proper way to handle this situation is. When I check one or more checkboxes then loop through to find which ones were checked if I didnt move the selected cell before clicking go it will not detect the last checkbox checked. However if I change selection it does. Problem is I dont want to change selection, I tried unsBelow is the code I'm using to find which checkbox is checked. This will msgbox me the text in the second column of all the rows checked except the last one I checked
For
Each
chk_s In
[code]....
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Jun 13, 2011
Basically I am looking for if I click on my checkbox, it should reset my datagrid column lastseqno to 0. Is it possible?
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Nov 22, 2011
I have a DataGridViewCheckBoxColumn who's column name is "booReadyToReport want to hide all the checkboxes in this column if "bintAnalyteCodeID" doesn't equal the selected value in a combobox on my form. ut I run this bit of code the DataGridView DataError event fires currently, have nothing in the event except an comment. he code seems to work, but I'm new to VB.NET and I'm wondering if this is the correct way to handle thishould I use the CellPainting event?
highlight rows with RBF3
For Each dr As DataGridViewRow In Me.dgvCalculatedResults.Rows
f dr.Cells("bintAnalyteCodeID").Value = Me.cbxAnalyte.SelectedValue Then
[code].....
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May 15, 2011
I have some DataGridView code written in vb.net. (Nothing is attached to a datasource.)The 4th column is a checkbox cell.How do I detect if that checkBox is checked or unchecked?This code strangely reports TRUE or FALSE at random times. It even turns ON the checkbox in rows other than the row I clicked in. (Huh?)
Private Sub DataGridView1_CellContentClick(ByVal sender As System.Object, ByVal e As System.Windows.Forms.DataGridViewCellEventArgs) Handles DataGridView1.CellContentClick
Dim whichGrid As DataGridView = CType(sender, DataGridView)
[code].....
I've tried countless other methods... none seem to actually get the checkbox ON/OFF value in vb.net.
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Jun 12, 2011
I need to "refresh" a DataGridView, bound to a database table, on a form within a TabControl The DataGridView is loaded correctly on strartup... But if the data in the DataBase change, How do I refresh it to reflect new records or updates?
this is what I am doing in code, after looking for some examples on the web:
MyTabBindingSource.EndEdit()
Me.MyTableAdapter.ClearBeforeFill = True
Me.MyTableAdapter.Fill(Me.MyDataSet.MyTable)
[Code]....
but nothing changes at all...Do I need to refresh/repaint the TabControl as well as th Form containing it? or what else??
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Apr 2, 2010
I've been searching all over and I'm either not searching for the right words or it just doesn't exist. I've got a datagridview (dgv) on a form with some textboxes that are databound to different fields in the dgv's datasource. I want to capture an event if someone changes a value through one of the databound controls so I can mark the row as modified. I've been going through the dgv events trying to capture something, but I can't find anything that fires when a value is changed. The dgv is read only, so the values can only be changed through the databount textboxes.
How to I know if someone changes a value in the dgv? Is there a setting in the dgv that will tell me if a row is modified?
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May 7, 2012
I have an unbound Datagridview which gets its data from an array from an Excel sheet. I give the user the chance to amend this data in a Datagridview. I then need to know if the user has changed this data before processing it further. I have in vain, tried to use IsCurrentRowDirty, IsCurrentCellDirty, looping through DGV matrix etc. It seems that because the DGV is not bound to a dataset then the normal properties like HasChanged and the 2 above don't seem to work. Here is my attempted code which is not working:
Dim DGRow As DataGridViewRow
Dim DGCell As DataGridViewCell
For Each DGRow In DGV_ReviewDetails.Rows
[code]....
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Jan 13, 2012
-> MS Visual Studio 2010 (vb.net)
-> ODBC Connection
I made an account manager where i can store all my accounts and I want it more protected, how can I changed the displayed text in my "colPassword" in datagridview? Just like in textbox the PasswordChar, please give me sample code :)
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Aug 9, 2011
i'm using vb 2010 to write a program for my school. i'm asking the teachers to key in their student's curricular activities into a program through datagridview. i manage to restrict the code they enter by validating it in the datagridview cellvaluechanged event handler. my idea is as follow.
1. teacher enters code in the datagrid.
2. vb check the the value and if it is in the database then update. if not then give a preset value "-1" as no record.
these are my code...
Private Sub DataGridView1_CellValueChanged(ByVal sender As System.Object, ByVal e As System.Windows.Forms.DataGridViewCellEventArgs) Handles DataGridView1.CellValueChanged
Dim Cn As New ADODB.Connection
[Code]....
my problem is... is there a way so that when the teacher enters an INVALID CODE and leaves the cell by mean of pressing "enter" or by clicking at other cells, the cell edited before is remain focused and the value before is revert back?
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May 13, 2010
I have a DataGridView on a windows form.
The 4th column is a combo box column.
Now what I want to do is capture the event every time a value is changed in the combo box drop down (selectedindexchanged). When the index is changed, I want to grab the row number, and then I will grab the value of the now selectedindex and do some database updates with it.
I currently have tried to put together an event grabber when the combo box is changed, however it doesn't work correctly.
My code is:
Private Sub dgvRooms_EditingControlShowing(ByVal sender As Object, _
ByVal e As DataGridViewEditingControlShowingEventArgs) _
Handles dgvRooms.EditingControlShowing
[Code].....
I put in a message box to check that it was capturing the event. I then noticed that it captures it more than once when you change the value.
The problem is when I go to click the down arrow on the row, the event is run once (message box show). Then you have to click a second time (event is run again with message box) before it shows the drop down list.
Then when you click on the value you wish in the drop down box it shows the message box (the only time I want it to run).
Then when I leave that row, it shows the message box two more times.
Effectively it goes to update the data 5 times, I only want to do it once.
I can not there is a pencil editing icon when you click on a row to the far left, and it appears when you leave the row, after already clicking on your value, it then checks on row leave that the values havn't changed, hence it runs two more times.
How do I make it so it only runs once on the value being changed?
Is there a way to disable the pencil editing, but still enable the combo box column to work? (be clickable and choose an option)
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Jun 6, 2009
I have datagridview with XSD as the binding source (i configured it with the smart tags). After build, the dgv change its columnIndex which surely result error of my code.
For example
columnIndex(0) = idEmployee (dataGridViewTextBoxColumn)
columnIndex(1) = name (dataGridViewTextBoxColumn)
columnIndex(2) = status (dataGridViewCheckBoxColumn)
suddenly, the columnIndex(2) moved into columnIndex(0)
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Apr 21, 2010
I am using oracle database and i already created a connection and retrieved data from my oracle DB to Datagridview using oledb commands,now my major challenge which has gotten me sick is to update any changes made in the datagridview to the oracle database. I tried using sqlcommandbuilder but failed. This code is what i used to retrieved the data from oracle and place it into the datagridview.
These are my declarations i made at the beginning of the form:
Private myDA As OleDbDataAdapter
Private myDataSet As DataSet
These are the codes inside the search button to load the retrieved data from oracle into the datagridview
Public con As OleDbConnection = New OleDbConnection("Provider=MSDAORA.1;User ID=SYSTEM; Password=simon; database=project")
[Code]
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Aug 25, 2010
Ive got a datagridview, which the user can put in to 'edit' mode by double clicking. If they then make changes but click to another row, I want to msg asking if they are sure they want to discard then changes. If they say No I want to stop the selection change from being made.
Private Sub DataGridView1_SelectionChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles DataGridView1.SelectionChanged
If edit = True Then
[Code].....
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Aug 2, 2011
vb.net
Private Sub DataGridView1_CellValueChanged _
(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewCellEventArgs) _
Handles DataGridView1.CellValueChanged
[code]....
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Jun 13, 2011
I'm using a DGV and i'm looking for the best way to update the database whenever a new row is created OR whenever any datagrid view cell changes.
The following code works fine for new rows and my question is how can i adapt it to include ANY other changed cells of any other rows being or not new rows.
If Me.PECASDataGridView.CurrentRow.IsNewRow = True Then
Me.Validate()
Me.PECASBindingSource.EndEdit()
[Code].....
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Jan 16, 2009
I have a WinForms app with a datagridview and a bindingsource. I want the user to confirm changes before I save them to the database. don't want to pop up the confirmation dialog unless I know the user has made changes. So I need a way to check if changes have been made.
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May 23, 2011
Changing DataGridView BindingSource at Runtime Works but then Fails When Changed
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May 5, 2012
I changed my Username on my computer from i.e. "xxxxxx x xxxxx" to "Dennis"
VB 2008 during a compile gave me the following error: Error reading icon 'C:Usersxxxxxx x xxxxxAppDataRoamingMicrosoftVBExpress9.0VSProjectApplication.ico' -- The system cannot find the path specified.
The file "VSProjectApplication.ico" is in 'C:UsersDennisAppDataRoamingMicrosoftVBExpress9.0'
Somewhere in the VB2008 "configuration" files I believe that I need to manually change the old path to the new path.
I found the old path in the ".suo" file. The ".suo" file is not a text file. How can I edit the .suo file, save it so that it will work?
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Jan 20, 2010
on my Form I have a DataViewGrid and some textboxes with a save button (they are filled with additional data of the selected row).Save is disabled first, when I change something in the textboxes the save button is enabled.When the user changes a gow in the grid, I want to ask before changing the grid row, if he wants to save (if the button is enabled).I am using RowEnter but this is too late, then the selected row already changed (and my textboxes already got new data)...What event can I use to ask if I should save stuff before the user changes a row?Something like BeforeRowChanging with a chance to cancel changing the row?
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Aug 12, 2011
I need to change the cell type of an unbound datagridview ROW to checkbox type at runtime. Optionally adding a row of all checkboxes or changing the default type to checkbox is also fine. I see many examples for setting a column type to checkbox but I don't see anything that operates at the row level. Even operating at the cell level would be fine.
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Jul 7, 2010
I have the code below which works fine when checkbox at Cell 2 is Checked ie., the date is inserted in Cell 9. Now, when I unclick Cell 2 I want the Cell 9 to be cleared. Presently, it is not cleared after unchecking. The code highlighted in Red is the area I reckon I have a problem...
Code:
Private Sub DgvReturns_CellClick(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewCellEventArgs) Handles DgvReturns.CellClick
If e.ColumnIndex = 2 Then
[code]....
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Jan 20, 2011
i want to know how to perform some action when i check the checkedbox in the datagridview ?
if like, when i check this>> i will bring some data to another DGV, on the other way of saying is just add a new row into another DGV.
same goes to when unchecked the checkedbox >> i want to remove the row based on the checkbox in that specific row that i unchecked .
i used the method [datagridview_CellContentClick] and [datagridview_CellEndEdit] before..
for add new row into datagridview-SUCCESS but when i want to remove the specific row, -FAIL to do. that.
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Jul 1, 2010
I have a tbl called tblProjectpatients which also has 2 fields Yes and No (these have the data type - Bit). These two fields have been populated with false and true values. On my form, I have a datagridview which is populated with various values from tblProjectpatients. The problem am facing is that the checkbox's for Yes and No on the datagridview are empty at runtime eventhough at the backend they have either False or True values. I am expecting the checkbox showing on the datagridview to be either checked or Not Checked depending on the True or false values.
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Aug 8, 2010
I have a datagridview (unbound). Fields are Name, Family Name and Phone No and a checkbox colum.There are ten rows in that DataGridView. There is an OK buttonI need to get message of showing which rows user has checked. The message should appear when user clicks OK button.I am not able to get this message. I tried following code in OK button
Dim strCB As String =
dgvChooseQs.Rows(0).Cells(3).Value.ToString
[code].....
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Apr 6, 2010
this code which supposedly updates myTable when the check mark is preset on a datagridview.The latter has a checkbox (a bit in myTable) in column 5.The code works but only updates one row no matter how many check are in the column.
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Aug 21, 2009
I have appended a column of checkboxes to a DataGridView using the following:
Dim chk As New DataGridViewCheckBoxColumn
DataGridView1.Columns.Insert(0, chk)
How do I change the checked state of a particular checkbox?
I have tried using the following code:
Dim val2 As DataGridViewCheckBoxCell = DataGridView1.Item(243, i)
val2.Value = True
DataGridView1.Item(243, i) = val2
The last line resulted in runtime error "InvalidOperationException was Unhandled
Cell provided already belong to a grid". Index 243 exists.
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Nov 1, 2011
I have a checkbox column in the datagridview and also a column named "partqty" which displays the quantity of materails available.. I would want that when the user checks on the checkbox, the quantities of checked rows should be added and displayed in the textbox..
I tired something like this.. But it displays 0(zero) in the textbox.Private Sub button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles button1.Click
[Code]...
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