DataGridView - How Many CheckBoxes Clicked
Jun 21, 2010
I'm using datagridview in my vb.net project. In that datagridview I use checkbox for null value check property if the user click that how I check if the box is check or not in a number of rows and know how many check boxes are clicked also want to count. i try with my coding but it leaves the first line how I check.
Dim tableid As Integer
mydisp = New SqlDataAdapter("select max(id) from tst_m_tables", Myconnection)
mydisp.Fill(mydst, "id")
tableid = mydst.Tables("id").Rows(0).Item(tableid)
For i = 0 To dgvtabledetails.Rows.Count - 1
[Code] .....
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Apr 12, 2010
I want to be able to only set one record in my tables as a default value. So when I check the checkboxcolumn of one row in my datagridview all the other checboxes in the other rows must be set to false. How can I do this?
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Dec 9, 2010
How to count the total no. of asp.net checkboxes, checkboxes checked, no. of checkboxes remain unchecked in webform using vb.net ?I m using Visual studio 2008 with vb as a language ..I my webform i have 10 checkboxes...i wanna count total no. of checkboxes in webform in textboxes1 total no. of checkboxes checked in webform in textbox2 total no. of checkboxes remain unchecked in webform in textbox3?
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Jun 21, 2010
I'm working on a project where I've loaded a database into a DGV. I also have an additional unbound checkbox column for the users to select entries with. I have code in place to read the selected rows and save them into a CSV string, which is then saved in the usersettings. All this works fine.
PROBLEM AREA:
I'm trying to reverse this effect so that when the DGV loads, the checkboxes that the user selected previously are checked (and the others left unchecked). I've debugged this extensively, and using watches have confirmed that all the values in the loops are right, and the conditionals are all kicking correctly, but it seems the code I'm using to actually check the boxes doesn't work. I've searched dozens of web pages, msdn white papers, and forums, but no suggestions will check the darned box. Below is some example code.[CODE...]
In debugging, it seems the value for the Cells IS changed, but the checkbox never gets selected. The try/catch was just to pick any error messages (but there are none with this code). What am I doing wrong here?
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May 6, 2012
I have a datagridview that is showing Yes and No in 2 checkbox cells. (Logically I should have just one checkbox but it is a legacy program (from Excel VBA)). So what I want to do is if the user clicks one checkbox cell to make the value True then the other checkbox in the row needs to be set to False. I have googled and searched the Forums here for an answer for this but found nothing really specific. The envisaged problem here of course would be that the events are mutual so they should not keep firing continuously in a "loop" when one or the other is changed - that might be the really difficult bit.
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Jun 4, 2011
i am currently having problems with Datagridview, for example when i select the first checkbox, second checkbox onwards.
I would like to update the textbox on my form to display '2' records selected. But there is one problem i faced is that when i deselect the checkbox, it does not update. It still display '2' record selected. What event handler should i use to get it to work?
Private Sub DataGridView1_CellContentClick(ByVal sender As System.Object, ByVal e As System.Windows.Forms.DataGridViewCellEventArgs) Handles dgvAssignGridView.CellContentClick
[Code]......
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May 24, 2010
I have a strange problem with a DataGridView I'm using which is bound to a table in VB.net
I've added a checkbox column to allow a user to tick a bunch of rows that I can then loop through and save off to a different table. All the checkboxes are enabled by default. So it's really a case of unchecking the rows which aren't required.
However, the DataGridView re-enables any checkbox that I click after I click on a checkbox in another row. So in effect, only one row can be unchecked at a time.
EDIT: I forgot to mention this is a Windows form, not an ASP.net application.
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Mar 9, 2010
.Net 3.5
I have 2 columns in a datagridview bound to datasource. When the user checks off one checkbox, i want to check some business logic after which I set the 2nd check box in the same row as checked as well.
My problem is: I want to check the 2nd check box right after the user clicks on the first checkbox and not only after he tabs away by clicking somewhere else.
Right now, I only succeed runing my business logic in the CellValueChanged or CellParsing events but those only occur after the user leaves the checkbox, which is not desired, I d like to run the logic and show the 2nd checkbox checked right after the user clicks on the 1st checkbox.
I also tried: CellClick event but I don t know how to : when the user clicks on a a checkbox, how to change the value of other checkboxes in the current row during CellClick event . The changes does not take effect in the UI !!!
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Jul 12, 2010
I am working with a datagridview and checkboxes. Ok, I have the following code which runs without any errors but doesnt give the required results.
1) My problem is that, when I uncheck the checkbox in Cell 2, I want Cell 9 and Cell 6 to be empty.
2) When I uncheck the checkbox in Cell 2 and click any other Cell in the datagridview and check again checkbox in Cell 2 - it DELETES the data in Cell 9 & 6.
Now, when I check again the checkbox in Cell 2, Data is not populated in Cell 9 & 6 regardless how many times I try....
[Code]...
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Mar 20, 2012
I believe the following code, which clears/unchecks the checkbox in the "RowSelect" column, actually runs, but it runs VERY slowly. In testing I have approximately 2300 rows in my DataGridView:
Private Sub btnClearAll_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnClearAll.Click
Dim curRowIndex As Integer = 0
Try
dgvWISDataGrid.SuspendLayout()
For curRowIndex = 0 To dgvWISDataGrid.RowCount - 1
[Code] .....
The app appears to "hang" because this loop is taking so much time. When I hit the pause button, it always seems to freeze on the "dgvCell.Value = False" statement and when I hover over it the popup says "Property evaluation failed." Something is taking quite a long time or is interfering with this routine.
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Jul 14, 2010
i've create a datagridview with two columns, one textbox and the other checkboxes. The chekcbox column has a check box in column header aswell.
When i resize each column the checkbox column speciallly the checkbox in the column header, does not align with the checkbox column, it even goes in the textbox column as well. How do i fix this column resize issue?
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Sep 30, 2009
I have a checkbox column in my grid. Let say the name on that column is "Cut". How should I do to take the right mouse button and and get a little menu where I can choose select all or deselect all checkboxes?
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Nov 27, 2009
I have to implement a column (TransactionCompleted) which will only hold two states Yes/No. I am using SQL Express and wonder which would be the best DataType to go for that column, if I prefer to display the data in a DataGridView column as CheckBoxes later in my application?
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Aug 2, 2009
Example i have a tabcontrol contains 4 tabpages.Each tabpage have a datagridview. I want when i click any datagridview in those tabpages then a msgbox ll show name of datagridview which has just clicked.I want to determine it. But i dont want to use method loop though controls of tabcontrol and check what datagridview visible.Shortly i want to determine what datagridview i clicked ?
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Mar 26, 2010
I have a datagridview that I have put a ContextMenuStrip1 on. I would like it to remove a row in the datagridview when the row is right clicked on and they click on "delete row". I have the delete working and the menu is showing up but this isn't firing when you right click on the datagridview.
This is where I am setting the row to edit:
Private Sub ModifyRowToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ModifyRowToolStripMenuItem.Click
If Not datagridview_TagAssignment.CurrentRow Is Nothing Then
[Code] .....
I am always ending up on row(0) and never the row I right clicked on.
Private Sub datagridview_TagAssignment_CellMouseClick(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewCellMouseEventArgs) Handles datagridview_TagAssignment.CellMouseClick
If e.Button = Windows.Forms.MouseButtons.Right AndAlso e.RowIndex >= 0 Then
datagridview_TagAssignment.Rows(e.RowIndex).Selected = True
End If
End Sub
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Aug 12, 2010
This is my first time using the checkbox in a datagridview. I added the column at design time and it is false for readonly and frozen. But when I click on it at runtime nothing is happening. Do I have to check it through the event?
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May 30, 2009
i need to know exactly when a checkbox is checked either by clicking or by spacebar.
I have looked at cellbeginedit, cellclick, cellcontentclick,cellendedit,cellformatting,cellleave,cellpainting,cellvalidating,cellvalidated,cellvaluechanged, and cellvalueneeded.
None of these inform me of when the checkbox value is changed. cellclick is almost the one, but it fires before the value is changed. cellvaluechanged doesnt fire until you leave the cell. the cell value changes and the cell is painted even if you dont leave the cell.
I have spent all day trying to get it right. I want to detect exactly when the checkbox value is changed so i can do some calculations and depending on the calculations, i may cancel the check mark.
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May 19, 2009
I have a loaded DatagridView which contains a row/column with an employee number in it. Outside of the DatagridView at the the top of my form I have a small PictureBox. My goal is for the user to select the employees row (not cell),pull the employee number from that row/column, and then use a LINQ query against another table to display the image stored in that table.
Determine the event needed in the DatagridView?How do I pull the employee number from the selected row?What considerations, if any would the LINQ query need to pull the picture from the table?
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Mar 9, 2011
I 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?
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Nov 27, 2009
I'm pretty new to VB.Net programming, but have already been able to figure out many things using this forum, but also via the many other forums on the internet.I'm currently stuck with a question though regarding getting the clicked value in a datagridview comboboxcolumn.When I use _Selected IndexChanged and then check the current cells value, what I get is the value before I clicked the new one in the comboboxcolumn.When I use _CellEditFinished, I can get the new value, but only after I selected another cell, or changed focus to another object.How do I get the new value from a DataGridViews ComboBoxColumn the moment I clicked it in the pulldown menu from the ComboBoxColumn?
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Oct 11, 2011
I have a datagridview with checkboxes in the first column and I want to do a loop on saving the serialnumber(s) when the users decides to check a number of checkboxes Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
[Code]...
the problem with this code is that it only inserts the serial number of the LAST checked checkbox and the number of entries of it depends on the number of checked checkbox for example ... if I checked the rows with the serialnumber 123 and 55652341, first the row with the serial number 123 then second 55652341, only 55652341 appears in the database and it is entered twice(twice because two checkboxes are checked)
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Mar 10, 2010
coding a "check all" button for datagridview checkboxes.
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Mar 19, 2010
I have an asp.net page which a user types in a "search" box, the code behind functions/subs etc produce a list of users matching the search criteria. In front of all the users returned in the search results, I have codded a html checkbox. Under the list of results, there is an "email users" button...
so.. I want to be able to click a number of checkboxes beside the results and then click on "email users" button which should take me to another page with email functionality so an email can be sent to all the previously selected users My confusion is over getting the "selected" user list from the results into the email page.
Because the checkboxes are manually coded within the code-behind file (ie the code basically generates a bit of html and pushes it into a label "placeholder", so I dont get any control functionality to get the checkboxes using the vb code, or can I?
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Nov 9, 2009
how to add checkboxes into datagrid.
what all references should be made.
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Jan 17, 2012
I have a listviw with 5 columns. how to add only checkboxes in column 4 and 5? Every time I add an item to that listbox the first three columns will have text and the last two will have always only checkboxes?
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May 14, 2012
I have a form which contains a checkbox field. On page load I want to create a separate checkbox for each customer in my Database. The code I have to create the checkboxes for each customer works fine. However, I also want to check in the database if the customer is set to unauthorized if they are then I want to check there box. I also have code for the case where the user checks a box. If a box is checked I update the database setting the unauthorized attribute to true. My problem is when I check a box it works fine and the box is checked, however if I reload the page all the boxes are unchecked. So either my database update is not updating the database or the way I check on page load for checked boxes is incorrect. Any ideas?
The code for the asp checkbox field:
<asp:CheckBoxList id="check1" AutoPostBack="True" TextAlign="Right" OnSelectedIndexChanged="Check" runat="server">
</asp:CheckBoxList>
The Code for the page load:
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
Dim sql As String = "SELECT Name, unauthorized, ID FROM Customer ORDER BY Name"
Dim dt As DataTable = db.execDataTableQuery(sql, "Customer")
[code]....
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Jan 10, 2011
I'm a newbie in VB.NET and ASP.NET. This is my problem:I retrieve a list of records from DB and, for every row, I need to show 4 checkboxes. I can use a checkboxlist for every rows, but it's not so clear how I can process the results after the submit.
I've some object and some operations available for that object. From database I extract a list of object with all operations. For every operation I want to show a check box to enable or disable the operation. The result is something like that:
[code]...
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Nov 27, 2011
Using VB
Say I have five checkboxes in a groupbox. I want to run an if then statement where if all boxes are not checked I would perform a certain action. I currently have it set to work using code similar to this
If box1.Checked = False And box2.Checked = False And box3.Checked = False And box4.Checked = False And box5.Checked = False Then
End If
Is it possible to reference the entire groupbox has having a false boolean property?
While doing this is managable - what if I had more check boxes?
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Aug 19, 2009
i have 15 checkboxes in the form
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
'Dim a As Integer
'For a = 1 To 15
'If ColorDialog1.ShowDialog = DialogResult.OK Then
[code]....
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May 1, 2009
I am working with an old web application developed in VB.NET 1.1 framework. I am having an issue with checkboxes. I have the following code for my checkbox:
<asp:TemplateColumn HeaderText="Reviewed">
<ItemStyle HorizontalAlign="Center" VerticalAlign="Middle" />
<ItemTemplate>
<asp:checkbox ID="chkAppRev" Runat="server"
[Code]...
This all works fine until I add another check box in the asp code and another oncheckchanged method, it seems like it just skips over the query.
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