Use A Checkbox That Is Dynamically Declared In An .vb File ?
Feb 18, 2011
I am trying to use a checkbox that is dynamically declared in an .vb file that I am trying to write into my .aspx page. I am able to write a normal checkbox of <input type='checkbox /> from the .vb Class using Response.write, but it comes up blank when using <asp:Checkbox runat='server' />I need to pass whether or not the box is checked back to the server, because I am having to either approve something if one is checked, reject something if the other is checked or do nothing if neither are checked. I have figured out how to make them mutually exclusive either way so that is not the problem.
I'm creating an quiz application which queries the database and extracts the questions and choices. I use dynamically created controls such as a checkbox list and fill the values dynamically. How do I do this? Right now I have these functions:
array_random_init(); this creates a 10 element integer array from 1-20 - extract_question(i): this extracts a question indexed at i in DB, I created the controls and set the appropriate text in this function. - validate_question(i); this is called by button_click and validates the question i according to DB.
I understand I have to recreate the controls in Page_init on postback, but what should it look like? Do I need to add "if IsPostBack" in page_init, or do I create the controls in page_init() and reset their properties in page_load when I use extract_question(i)? Also, I cannot seem to clear the selected boxes on postback, I added page directive "enableviewstate=false" but it doesn't work.
i have a fileupload control from which i need the path of a text file. After selecting the file,i need to open the file for reading the data from the text file.For this, i used the following code to open the text file.
fp=File.OpenText(FileUpload2.PostedFile.FileName)
This is working fine in my system.The FileUpload2.PostedFile.FileName statement gives the path of the file.The File.OpenText method opens the selected file.But when i run my project in IIS,it gives the following error:
"File.OpenText is not declared."
The FileUpload2.PostedFile.FileName statement is not retrieving the path, it retrieves only only the filename.what could be the reason?
I am dynamically creating a table which places a dynamically created radiobuttonlist in each row.
I then want to display the results on the page when the submit button is clicked.
I am getting an error message stating that
'question1' is not declared
Why might this be happening?? I've included all my code below.
Code behind:
Sub Page_Load(ByVal Sender as Object, ByVal E as EventArgs)
For i As Integer = 1 To 3 Dim TableRow As New TableRow() Dim TableRowCell_1 As New TableCell() TableRowCell_1.Text = i Dim TableRowCell_2 As New TableCell() TableRow.Cells.Add(TableRowCell_1) TableRow.Cells.Add(TableRowCell_2) QuestionnaireTable.Rows.Add(TableRow) Dim question As New RadioButtonList question.ID = "question" & i question.RepeatColumns = "2" question.Items.Insert(0, new listitem("", "1")) question.Items.Insert(1, new listitem("", "2")) TableRowCell_3.Controls.Add(question) Next End Sub Sub btnSendFeedback_Click(sender as Object, e as EventArgs) Dim question1 As RadioButtonList = DirectCast(Page.FindControl("question1"), RadioButtonList) Dim question2 As RadioButtonList = DirectCast(Page.FindControl("question2"), RadioButtonList) Dim question3 As RadioButtonList = DirectCast(Page.FindControl("question3"), RadioButtonList) Response.write(question1.SelectedValue & " - " & question2.SelectedValue & " - " & question3.SelectedValue) End Sub Body: <asp:Table runat="server" ID="QuestionnaireTable" /> <asp:Button OnClick="btnSendFeedback_Click" runat="server" Text="Submit..." ID="submitbutton" />
I'm trying to have a checkbox disable and enable a textbox, within a strongly typed viewmodel.
[Code]....
I couldn't find any way to make a checking the nine2five checkbox to disable the startTime and endTime textboxes (and set values to 9 and 5 appropriately).
i am desigining an application where i m creating checkBox (not checkBoxList) dynamically. There is one master check box that define group if i click that it should click all subCheck box under it.I am using ajax in my application.i am able to generate check box at runtime but not able to find its event here is the code for creating check box and its event.
//This define master check box
CheckBox MstChk = new CheckBox(); MstChk.ID = Str_Header; MstChk.AutoPostBack = true; MstChk.CheckedChanged += new System.EventHandler(MstChk_CheckedChanged);
[code]...
now problem is here when i click on masterCheckBox i am not able to get Evnet MstChk_CheckedChanged but if call DesignUserPrivilegePnl() in page_init instant of Page_Load i am able to get the event but then i get erro object instatnt not set to an instat of object at foreach (Control Child in Parent.Controls)i am googled but still not get the solution hope you people will guide to overcome my error
I have a asp.net page where we need to dynamically generate a table, table row, and a checkbox controls in this row. A button serves Add Row and create checkbox function, which works fine. We have another button which serves on deleting the selected row if a user checks the checkbox. The deleting event is dynamically added to the checkbox. But the delete button is not working at all. I think that the page does not maintain the states of dynamically generated controls, even I set Page enable view state to True. Here is the code:
I am generating a table dynamically with one row having four cells.
First cell is having checkbox and below is the code how i declare it and assign it a new id at runtime.
now i am facing the problem to validate the checkboxlist is displaying dynamically, acutally at my present page i am doing the checkboxlist which is controled by another check box for the checkboxlist items for select and deselect, now i need to handle the validation for this checkboxlist for null value
I have created one user control in which I have taken a gridview. Columns of this gridview are getting generated dynamically. (i.e. I read Column name from Xml file) But now I want my first coloumn of this gridview as a checkbox field.
however, on the server side (after postback) I can't read them from the Request Object. How do I "mark" them so I can read them at the postback?
protected void DeleteSelection_Click(object sender, ImageClickEventArgs e) { int multiIdsToDelete = Request.Form["multiCheck"]; <-- In the Future will be added to an array so I can do the delete for each row selected. }
Im basically listing a set of facilities in a datagrid. Like so:b Projectorcb Laptopcb TelevisonIn roomview, a check appears where a facility is availble in a room. This part works fine.The user can then edit the facilities, by clicking on the check beside each facility. When the update button is pushed I need to record the value of the checkbox, however I cant get the value of the checkbox.eres my codebehind:
I have a question about C Sharp ASP.NET:Is there a difference (in code speed, resources) between:public static variable declared in public static class MyGlobals in a 'Code File' template;and the variable declared in a normal 'Class File' template;I use this variable in 2 different Class Files and also in _Default Page codebehind cs file.In fact in my case I need about 20 global variables of type List<string>.
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
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 gridview control i added checkbox contrl dynamically but i am not getiing the reference of checkbox in button clilck event here is my code Gridvew
What I have developed so far is a panel which allows a user to leave feedback for a page they are viewing. Now - my problem is how to control what will be displayed. What is preventing me moving forward is the fact that I need to re-use checkboxes (ids) in more than one instance. But the checkbox id will only exists once on the page depending on the users choice. An example of the above is as follows (which is based on choice). So if a user clicks:
1) "Yes" - A texbox and a submit button will appear.
2) "Yes, with the exception of..." - A group of predefined checkboxes, a texbox and a submit button will appear.
3) "No" - A group of predefined checkboxes, a texbox and a submit button will appear.
Now with option 2 and 3, they will re-use a few of the same checkboxes, but because I cannot assign the control with the same ID twice on the page (or can I?), this is where I need to introduce the dynamic assignment? Is this correct? Is my thought process on the above correct? If so, what will be the best way of doing this. Is there a demo or perhaps a tutorial on this out there? I've searched, but did not quite find the above setup.
Because I have never assigned controls dynamically, I am a little confused or should I say cautious that what I am trying to achieve in this frame of mind is even correct. Now that my database is setup, the page is capturing all the required information - the final step is getting all the feedback controls displayed correctly in the panel.
I get the above error while compiling and the name is in my .aspx file while i try to assign it in my .vb file like this IN .aspx file:
<tr> <td class="txtarialsml">SEC Fee</td> <td> <asp:TextBox runat="server" ID="txtsec" Width="150px" BorderColor="Silver" BorderStyle="Solid" BorderWidth="1px" ReadOnly="true" CssClass="txtverdlink" Height="18px"></asp:TextBox></td> </tr> <tr> <td class="txtarialsml">CSCS Fee</td> <td> <asp:TextBox runat="server" ID="txtcscs" Width="150px" BorderColor="Silver" BorderStyle="Solid" BorderWidth="1px" ReadOnly="true" CssClass="txtverdlink" Height="18px"></asp:TextBox></td> </tr> <tr> <td class="txtarialsml">NSE Fee</td> <td> <asp:TextBox runat="server" ID="txtnse" Width="150px" BorderColor="Silver" BorderStyle="Solid" BorderWidth="1px" ReadOnly="true" CssClass="txtverdlink" Height="18px"></asp:TextBox></td> </tr> In .VB file Protected Sub drpstock_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles drpstock.SelectedIndexChanged Try txtsec.Text = "" txtnse.Text() = "" txtcscs.Text() = "" Catch ex As Exception Session("errorcode") = "blabla" Session("errordesc") = "This exception occurred while trying to fetch data." Response.Redirect("../errorpage.aspx") End Try End Sub Public Sub dg_ItemDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.DataGridItemEventArgs) Dim row As DataGridItem = e.Item lblData.Text = "in subprocedure" If row.ItemType = ListItemType.Item OrElse row.ItemType = ListItemType.AlternatingItem Then Dim day As DateTime = Convert.ToDateTime(DirectCast(row.DataItem, DataRowView)("day").ToString()) Dim tempMonth As Integer = day.Month Dim lblMonth As Label = DirectCast(row.Cells(0).FindControl("lblMonth"), Label) If row.ItemIndex = 0 Then UpdateLabel(lblMonth, day) End If If currMonth <> tempMonth Then 'add blank row currMonth = tempMonth j += 1 AddRow(row.ItemIndex + j) UpdateLabel(lblMonth, day) End If End If End Sub
