i generated dynamic checkbox n placed it in table cell( <td runat='server' id="trial"></td>) ,
i am not able to check whether check is checked when i click a button.
i recieve exeception :System.NullReferenceException was unhandled by user code
[Code]....
I'm unable to get the check box value from dynamically created gridview in vs2010. I'm using the ITemplat class to create the templat column.
View 2 RepliesI have a check box in the grid.IF IsChecked has a value checkbox should be checked else not.Should i check the check box in the ItemDataBound event or will it get checked automatically.
<asp:DataGrid Runat="server" ID="gridProduct" AllowPaging="True">
<Columns>
<asp:TemplateColumn HeaderText="Employee Name">[code]....
I can't seem to check the checked value of a dynamic checkbox within a gridview. I've tried dozens of ways to test the checkbox's checked value, but it still returns false, when it should return true. If I change the checked value to true in the ASPX web page, then it will return true, even when it should return false. Any ideas? I've tried many different ways of checking the checkbox value including the one below.
MailingLabels.aspx
Code:
<asp:GridView ID="GridView" runat="server" AutoGenerateColumns="False" DataKeyNames="NewClientID">
<Columns>
<asp:BoundField DataField="NewClientID" InsertVisible="false" />
[code]....
finding all check boxes in asp.net grid view is checked or not.
Depending on this I have to grayed out a button...
I have to enable the button depending on all check boxes are checked..
how to do this and on which event i have to place my code.
Suppsoe that a certain dynamic property of a ViewBag object is optional. How can I check whether it has been created or not?
My first reaction is to check for null value.
Code:
@if (ViewBag.OptProp != null) {...}
But then how to handle the case when the property has been actually created, but the value assigned to it is null ?
How do I check if an object has a property in JavaScript?. Except mine is about .NET .
how to check if a dynamically created control has posted back?The below code is not working.
[Code]....
I have created some imagebuttons dyanmically on page_Init. But the above code always returns null. Why is that? How can I check If an image button has posted back?
Note: I am able to handle the click events of those imagebuttons.
Here is my code through which i can generate dynamically 2 checkbox group
DataTable dt = new DataTable();
DataList1.DataSource = dt;
DataList1.DataBind();
DataList2.DataSource = dt;
DataList2.DataBind();
Design Page
[code]....
There is two checkbox group which have same datasource, so in both case same checkbox are showing and also same event is firing for both. Here is the event code
protected void CheckBox_CheckedChanged(object sender, EventArgs e)
{
string OpService = ((CheckBox)sender).Text;
}
Now what i want to do is, while check one checkbox from the 1st checkbox group the same checkbox should be selected from the second checkbox group automatically, also if i deselect one checkbox that should be deselect from both checkbox group.
I have a check-box on an asp.net page. I want it to be keep checked or un-checked untill user toggels it, although user exits or reloads the page many times.
View 3 RepliesI have a web form with a gridview control on it. The GridView has a column of check boxes. Before the web form closes I need to check if more than one check box was checked. If more than one check box was checked, then I need to display a popup message box informing the user that only one check box should be checked? I need to check to see if more than one check box was checked, when a "Submit" button on the form is pressed.
How can this be done using Asp.net/C# and Java Script? I know how to iterate through rows of a Grid control so I can do that in the C# code. But how to keep the web form open before I iterate through the rows, I don't know?
I am using following code on SelectedIndexChanged of Dropdownlist in GridView for filling txtCallCompletion.Text. When i am selecting first time it is coming correct and i am changing value of txtCallCompletion then i am selecting second checkbox then previous checked checkbox's txtCallCompletion value will be same as it is.
how to solve this issue in gridview checkbox i already checked.
[code]....
I have a gridview that returns several records for the same user and each record has a column with a check box. I need to allow the user to choose only one to check. Also one check box is always supposed to be checked. What is the best way to do it? I was thinking of writing a stored procedure that checks if only one is checked, and then returns true or false. I think there is a more efficient way to do it...
View 3 RepliesI need to validate textbox is not empty if check box is checked.
View 9 Repliesi m using checkedlistbox controle. i bind database single column to this controle and i want to check cheked property or indices is checked or not so what i do now?
View 1 RepliesI was trying to find out if there are any check boxes checked in the datagrid, if non of them is checked it should show me an alert to select atleast one.
My problem starts when there is paging in datagrid...
not able to check the entire datagrid at a time in itemDataBound event for the checked check boxes.
I have a couple of RadioButtons that are created dynamically. But after postback they don't retain their checked property. I also have some CheckBoxes and they work just fine using the same mechanism (code below). I have narrowed down the problem to the "GroupName" property. If I remove it, it works just fine. But I need the RadioButtons to be mutually exclusive.
[Code]....
Here's part of my markup
<asp:TemplateField HeaderText="Approval" Visible="false">
<InsertItemTemplate>
<asp:CheckBox ID="Approved" runat="server"/>This must be checked to allow the insert.
</InsertItemTemplate>
Here's my code
[code]....
I have a data grid and inside that datagrid check box and created using template field.
How can I check that a row in datagrid (not grid view) is checked or not.
For gridview we can use the below in codbehind file,
Boolean isChecked = ((CheckBox)(Row.FindControl("chkDelete"))).Checked;
For datagrid how to achieve this...
My aspx code is
<asp:DataGrid ID="dg1" runat="server">
<Columns>
<asp:TemplateColumn HeaderText="select">
<ItemTemplate>
<asp:CheckBox runat="server" ID="chkD" />
</ItemTemplate>
</asp:TemplateColumn>
</Columns>
</asp:DataGrid>
I have a asp.net treeview control that I need to be able to set a parent node to partially checked to show that child nodes are checked. Basically I need a 3 state or multi-state checkbox. All I can see from looking through the code is ways to set checked true or false.
View 2 RepliesI have group of radio buttons, each group ranges from 5 - 27 radiobuttons. And if any radio button in a group is checked I store 1 in db else I store 0. Now I'm checking each radiobutton using if loop to see if they are checked and set database value. I'm also trying to use the code below. Is there a good/better approach to check if they are checked or not?Current code:
'rname is radiobutton prefix for a given group
'cnt is number of radiobuttons in the group
Private Function RadioIsChecked(ByVal rname As String, ByVal cnt As Integer) As Integer
[code]...
I generate my check boxes dynamically:
for (int i = 0; i < dtCommon.Count; i++)
{
CheckBox newBox = new CheckBox();
newBox.Text = dtCommon[i].userName; [code]...
And when the save button is pressed I call this function:
protected void SaveUsers(object sender, EventArgs e)
{
}
How do I know which check boxes the user has checked?!
I am looping through all the posted data on my website and grabbing the values, this will then be used later on. The user is going to put 2 radio buttons on the page, one with a correct answer and one with an incorrect answer. I need to know how to see if a Radio Button is checked or not based on the posted data.
View 2 RepliesI have a detailsview with an update button one of the update fields is a checkbox which when is checked I want to automatically update a date field of when the checkbox was checked, am I going the right way with this code....... as I am getting a number of errors
Dim i As Integer
For i = 0 To detailsview2.Rows.Count - 1 Step i + 1
Dim row As GridViewRow = GridView1.Rows(i) [code]....
i have a UP and DOWN buttons ouside a gridview and a checkbox inside the templated field .I will check the checkbox to sleect a row , after that if i click on UP button the checkbox above the selected checkbox should be selected.
same with when i click on DOWN button the checkbox below the selected checkbox should be selected.
I have a grid view with two columns...one column has a no. like (123) and a check box....which user can checked or unchecked......all I need to do is that I need to disable the man handling of that check box......rather I would like to see a seperate grid view with the same no. of rows as of the first and in this gridview I may allow to type in or scan the no. and if this scanned or typed number matches any no. in the first gridview number then the corresponding check box should be checked/unchecked.
View 1 Replies
