Asp.net - Checkbox Within Datagrid Retaining Checked Value On Postback?
Feb 24, 2011
I have a project in VB.NET which is working fine which essentially has a Datagrid that has a TemplateColumn included which is a column of Checkboxes. The code to declare the datagrid is here...
<asp:datagrid id="dgDates" OnItemCommand="gridEventHandler" BorderColor="Black" BorderWidth="1px"
CellPadding="3" runat="server" AutoGenerateColumns="False" HorizontalAlign="Left" AllowSorting="True"
[Code]....
everything you see sbove is working perfectly fine...in the sense that when I click one of the checkboxes, the page_load fires, the gridItemDataBound fires on DataBind() and when all is done, the checkbox retains the value that the user clicked the checkbox.
With all this exact same code converted to C#....the events all fire in the same order, but the checkbox selected value always clears...
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Nov 27, 2010
I have unlimited asp.net checkboxes to my webpage .How to insert checkbox checked value to textbox without autopostback.I i check checkbox1 and checkbox2 then in textbox it appear as 1,2 ...and after when i uncheck checkbox1 then in textbox the value would be 2.and if i uncheck checkbox1 and checkbox2 then value in textbox is blank
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Dec 29, 2009
How can I check the 'Checked' property of a dynamically-created checkbox during the Page_Load subroutine? Basically, I have a VB.NET page that creates some table rows dynamically, based on a number selected by the user. So, for example, if the user selects "3" from a dropdown list, the page posts back and creates three table rows. Each row contains a couple of textboxes, a dropdown list, and a checkbox (which are all .NET form controls rather than plain HTML controls, I should point out).Typically, the user would enter a few details into the form controls, and click the 'Submit' button, after which the page iterates through each row, and inserts the data into a SQL Server table.But if the user ticks the checkbox for that row, this signifies that the page is to ignore that row, and NOT insert that row of data into the database when the user clicks 'Submit'. This works well, but there is a problem. If the user clicks 'Submit' and some of the values entered into the form controls are invalid (so, for example, the user didn't enter their name) then the page won't submit the data, and instead, shows an error to the user informing them of the values they need to change. But if the user creates three rows, for example, but decides to "ignore" the third row (by ticking the checkbox) then when the page posts back, finds some invalid entries, and re-shows the form to the user to allow them to correct any errors, I'd rather the page didn't render the third row altogether. After all, they chose to create three rows originally, but then decided that they only needed two. So it makes sense that the third row is not recreated.
But what seemed to happen was that objCheckbox.Checked was always returning False, even when the checkbox was ticked. Once the page had loaded, the table rows had rendered again, and the tick was present in the checkbox, so it's not like the value was lost on postback. But at the point I check whether the checkbox is ticked, it always returns False, rendering a table row that the user doesn't need.Does anyone know how to get round this problem? I've read lots of articles about the .NET ViewState, and the page lifecycle, but I've yet to find a solution that works. I simply need to be able to check if a checkbox is ticked before re-creating some dynamic controls. [code] But then I basically found out that you can't override a protected member with a public one.
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Mar 2, 2011
I am printing a files that are shown in datagrid.. But I want to choose a file that I don't want to print by checking the checkbox that I added in datagrid..
I have here the code for printing.. Anyone can edit my code that will print those file that is not checked.
Code:
Try
openMySQL()
Dim sql = "DROP TABLE IF EXISTS dummydisconnectionorder"
[Code].....
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May 17, 2011
I have the following code:
[Code]...
and when a user clicks on cell4, it's supposed to add the value of "Holiday" to my database and all of the data from that line. What's happening is that I can't even click on the checkbox.
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May 17, 2011
I have the following Private Sub holidaysaveButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles holidaysaveButton.Click For Each dr As DataGridViewRow In DataGridView1.Rows
[Code]...
and when a user clicks on cell4, it's supposed to add the value of "Holiday" to my database and all of the data from that line. What's happening is that I can't even click on the checkbox.
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May 20, 2009
I have a datalist control that is not retaining it values during postback when the control causing the postback is outside of the update panel that the Datalist resides in. I have verified that viewstate is on for that usercontrol as well as all its parent controls. My basic situation is that I have a Datalist that contains a user control on a page. When the user selects several rows in a grid and presses a button, a datatable is filled on the backend and assigned to the Datalist which has its item template set to the UserControl.
On ItemDataBound I set specific properties in the control which customize the messages on that control to the specific item. This is then popped up using the AJAX Control Toolkit Modal Popup[ Extender. When the user presses Save the whole page posts back. Data is collected from the user controls and saved to the DB and the popup disappears. The issue I am currently having is that the DataList has 0 items when the save button is pressed instead of the appropriate number. THis issue just started appearing after we upgraded from .NET 2.0 to .NET 3.5.
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Jun 11, 2011
I'm trying to program a personal project, but I've hit a bit of a bump in the road.I've got a Button, a Textbox, and a CheckedListBox; when the button is pressed, whatever is in the TextBox is added to the CheckedListBox. However, when the form is closed and reopened, all of the CheckedListBox's items are no longer present. My CheckedListBox's name in the code is ZapList.
Can someone assist me in, not only saving all of the CheckedListBox's items, but retaining whether or not they were checked as well as the order they were in? I've run out of hair to pull (figuratively) and I really don't want to quit this project, too much effort has gone into it and I'd hate to see it go unfinished like my numerous other projects. :icon_cry:
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Sep 8, 2009
There is a check box in my webform. whenever i tick it ..and click on back button it will not retain its state ..when i comeback using the next button to the same page.Note: view state is enabled in the control There is no code in the page load event
Code below:
Protected Sub chkBx_SR_wu_SelectedIndexChanged(ByVal sender As Object, ByVal e As EventArgs) Handles chkBx_SR_wu.SelectedIndexChanged
[code].....
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Nov 9, 2010
Insert checkbox checked value when checked to textbox as comma seperated string in vb.net or javascript
suppose i have 3 checkboxes and and 1 textboxes in my webpage.aspx
when i checked checkbox1 and checkbox2 then in textbox it will appear as 1,2 only on checkboxes checked event ...
and i want its revert also :
if i set textbox de
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Apr 15, 2011
I have a question, I can't really find the answer...Basically I have 2 FormsIn form number 1 I have 2 pictureboxes. I want to create a checkbox in form2 that says if checkbox 1 is checked then show picture 1 in form 1
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Aug 8, 2010
I have grouped some checkbox in GroupBox1, 2, 3 respectively. Now I want to know the tag value ( I am using a TAG property to assign a some value to radio button ) of check box which is checked in either of the groupboxes.
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Apr 24, 2012
i have one checkbox that is not header checkbox of gridview and one gridview i want to click on check box gridview all row selected
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May 14, 2009
I've got a simple Visual Basic 2008 Express Edition form which looks like this:[link Screenshot of simple form][1]I need some help with a skeleton script, which checks to see if each checkbox is checked or not. I've got a set of Word templates which all contain a macro.And I want to run the macro of each template, if the template exists.[code] know this pseudocode isn't correct at all, because I'm kind of a beginner, and designer over a programmer. But I've just started learning and I know this is pretty basic.it's just getting an overview of the logics in programming. And I think that getting to learn how to do this will help me with other things as well.
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Dec 27, 2010
i'm trying to set several checkbox to be checked based on retrieved value from database.So when i load the data,if the value is the same with checkbox name,then it will be checked.Is it possible to do that?
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Mar 20, 2012
I have a datagrid who's ItemsSource is a strongly typed IEnumerable object In this datagrid, I have a checkbox column, a price column, a part name column, and a 'total selling for' column. On checking the checkbox I need to update the total selling for column with the value in the price column. This part I have working, however, how can I get the checkbox to remain checked when this happens?
Private Sub UpdateSellFor(sender As System.Object, e As System.Windows.RoutedEventArgs)
Dim _CB As CheckBox = DirectCast(sender, CheckBox)
Dim _ID As Integer = _CB.Tag
Dim _PP = DirectCast(DG_PartsToSelect.CurrentItem, PartTyping).PartPrice
[code]....
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Oct 3, 2010
I have a datagridview with a checkbox column.i want to check whether checkbox is checked or not.If the checkbox is selected it should output as "True" in messagebox and if checkbox is not selected it should giving me a message "False".
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Apr 30, 2010
I have the function below which I call onload, I want to be able to check the checkbox (chkactive) if the ProjectStatus is set to True, how can I do that please.[code]
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Mar 20, 2010
I am using a BindingSource to fill all the textboxes on my form. It is working for all the textboxes but for some reason it is not working for my check boxes. The value from the database is a boolean and I am setting the property like this.
SG.IsBifocal = CType(.Item(CN_IsBifocal), Boolean)
Is there anything special that needs to be done to bind to a check box?
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Mar 21, 2011
I have the following code:
Code:
Private Sub dgProductAdj_CellContentClick(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewCellEventArgs) Handles dgProductAdj.CellContentClick
If DirectCast(dgProductAdj.CurrentRow.Cells("Repeat"), DataGridViewCheckBoxCell).Value = True Then
For Each irow As DataGridViewRow In dgProductAdj.Rows
If irow.Index <> dgProductAdj.CurrentRow.Index Then
[Code]...
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Jun 22, 2010
I have a form that creates a row of checkboxes depending on the type of analysis the user wants to perform on the incoming file. I need to be able to determine if the checkbox is "checked" but I don't know how to do that when the controls are created at runtime.So right now I have a loop going through all the controls on the form and selecting the appropriate case: for instance chkbox1, combobox1, etc. Now I can access the values of the control by using Me.Controls.Item(chkbox1) but after that the only thing resemebling checked is .Text which wouldn't be accurate. how do you workaround the .Checked property of a checkbox when it is created at runtime?
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May 2, 2010
I have a datagridview that is bound to a binding source. I used the following code to add a checkbox column to the datagridview:
Imports System.Windows.Forms
...
Dim cbx as DataGridViewCheckBoxColumn
[code].....
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May 11, 2012
What would be the syntax to check inside a visual basic form panel for checkboxes and find which are checked? I understand how I Could use a for loop and an if statement, but I'm confused as to the syntax to check for each checkbox. for example:
Dim i As Integer
For i = 1 To 10
'Here is where my code would go.
'I could have ten checkboxes named in sequence (cb1, cb2, etc),
'but how could I put i inside the name to test each checkbox?
Next
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Mar 3, 2012
I want to create a solid checkbox that is checked by default, and is not clickable. If you click it, nothing will happen . how to do this?
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Mar 20, 2011
[Code] The code is to make when one checkbox being checked, other checkbox within the gridview will be unchecked. But this code did not work at all. Is it my event handler wrong or code problem?
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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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Apr 12, 2009
DataGridViewCheckBoxColumn - Only 1 checkbox can be checked at a time?????????????//
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Nov 8, 2009
how to get checked value from tree view? My treeview value is from database.
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Jul 10, 2009
I want my app to check on form1.load if registry exists here:
(
"HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrentVersionRun")(This is to launch app at system startup)
[code].....
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Jul 1, 2009
I have a checkbox on Form2 that will enable an email notification. From Form1, it tests the .Checked property of the Form2 checkbox. What is happening is that the checkbox reverts to unchecked (default at run time) each time the form is closed.
What is the best way to keep the checkbox checked once the form is closed so that it will enable the email notification?
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