Web Forms :: Can't Find Controls That Created Dynamically

Jan 25, 2010

i create textbox dynamically (not in page_load)

for example

dim t as new textbox
t.text ="wywyr"
t.id="wrytwry"
panel1.controls.add(t)

after that when i want to get the value from this one i cant.

i searched all the controls that i add into panel1

For
Each Control
In panel1.Controls
Dim s
As
String = Control.GetType.ToString

and it doesnt show nothing

how do i get the value from the dynamically generated textbox ?

View 5 Replies


Similar Messages:

To Find Controls From Dynamically Created Table?

Jan 6, 2011

i wrote a function to create dynamic table in code behind on selectedindexchanged of checkbox,that is when user will check 2 checkboxex 2 tables will be generated with textboxes,Then on button click i want insert values of these textboxes in database,for that i want to find textbox using findcontrol,but i could not find it,

So i called same function of table creation on page load,but then it shows error that textbox is having duplicate id

View 2 Replies

How To Name And Find Dynamically Created Webcontrols In C#

Aug 10, 2010

I am trying to add a unique name to each textbox that I'm adding to a table.

I've tried:

TableRow someRow = new TableRow();
TableCell someCell = new TableCell();
TextBox someTextbox = new TextBox();
someTextbox.Attributes.Remove("name");
someTextbox.Attributes.Add("name",itsId);
someCell.Controls.Add(someTextBox);
someRow.Cells.Add(someCell);
theTable.Rows.Add(someRow);

The html generated includes both my name and the autogenerated name as attributes of the textbox.

Unfortunately, when I run a FindControl, by my name, I get a null reference, even though it still works to find it by the autogenerated name.

What do I need to do to find the control by my name? When / why is it autogenerating names for my controls?

Successful code:
TextBox tb = (TextBox)FindControl(autogeneratedID);
WriteToSomeOtherDiv(tb.Text);
Unsuccessful code:
TextBox tb = (TextBox)FindControl(myId);
WriteToSomeOtherDiv(tb.Text);

View 2 Replies

C# - Find Dynamically Created Table On Button Click?

Jul 21, 2010

i created dynamically a table with in a function... this table is added to a panel. and this panel is in ajax updatepanel... statically i have given no of rows as 3, for that table... in page_load my table with 3 rows is created.... but i cannot identify this table in another button click event...

i wrote the code like this...

System.Web.UI.WebControls.Table table = (System.Web.UI.WebControls.Table)addrowpnl.FindControl("Table1");

here Table1 is my dynamic table id.....

View 2 Replies

Web Forms :: Use Dynamically Created Controls Such As A Checkbox List And Fill The Values Dynamically?

Sep 28, 2010

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.

View 2 Replies

Web Forms :: How To Get An ID For Dynamically Created Controls

Jul 20, 2010

I have a tree view with checkboxes for leaf nodes. If i click on checkboxes, I am creating some html controls dynamically. And in other static button click event I need to get an ID's of those dynamically created controls.

My Code is:

.aspx
<asp:Panel ID="pnlOuter" runat="server" Visible="false" Width="650px">
<table>
<tr>
<td>
<asp:Label ID="lblQtnrName" runat="server" Text="Questionaire Name"></asp:Label>
<asp:TextBox ID="txtQtnrName" runat="server"></asp:TextBox>...

View 14 Replies

Forms Data Controls :: Find A Form Control That Is Created After Postback?

Sep 17, 2010

I have a drop down list (created during form design) with auto postback enabled. And I use AJAX to prevent 'visible postback'.

When a user choose an item from the drop down list, the system will then perform a postback and created a set of form control's such as label, drop down list and text box for entry.

Then, I will have a button (created during form design), and when I click on the button, i want to find for the form control that are created after the post back, but I cant find them!

I wonder if those form controls are render to the web form?? But I have no problem finding the drop down list that is created during design time.

View 3 Replies

Web Forms :: Want To Put Code In Dynamically Created Controls?

May 28, 2010

I need to create web controls (e.g. label etc) dynamically.The problem is that for example,

on my onload event, I create a label. The text of the label is read from one line of a xml file.

But sometimes the text should be like " Messages (4)", in which the message count is something not generic and need some logic to calculate. I tried to put things like "Message (<#% MessageCount %>) " in my xml file, but the displayed text label is:

Message (<#% MessageCount %>) instead of Message (4 ).

View 12 Replies

Web Forms :: How To Load Dynamically Created Controls

Mar 10, 2010

I was looking through my transcender exam kit for 70-562 and they say load dynamically created controls in the loadviewstateEvent. This should be CreateChildControls() instead, no?

View 1 Replies

Web Forms :: Validating Dynamically Created Controls?

Mar 21, 2011

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. What's the right way to do it?

View 3 Replies

Web Forms :: Retrieve Dynamically Created Controls?

Sep 13, 2010

I am building a webform dynamically but when I go to get the values the placeholder has no controls. Every control added has an unique ID. Does anyone know what I am doing wrong (language is C#).

aspx page

<asp:UpdatePanel ID="upShoppingCart" runat="server" UpdateMode="Conditional" >
<ContentTemplate>
<asp:PlaceHolder ID="phShoppingCart" runat="server" />
<br /><asp:Button ID="btnUpdateCart" runat="server" Text="Update" OnClick="btnUpdateCart_OnClick" />

[Code]....

View 6 Replies

Web Forms :: How To Use AddHandler To Dynamically Assign Events To Dynamically Created Buttons

Feb 14, 2011

I have a website that sales associates access to view account information with clients. S.A's can only view information for accounts that they are tied to. Some clients have more than one account, S.A's can be tied to more than one account, but not all accounts of one client need to be tied to one S.A.

On the account info pages, I have account numbers (dynamically displayed labels) displayed of other accounts that the account client is associated with, which the S.A's can see. I'm modding this so that if the S.A has viewing permissions of any of the other accounts on that list of accounts, that instead of a label being displayed, a button directing them to that account page will display instead. In order for this to work, I have to attach a security function to the button, otherwise the page will blow out on the S.A's.

So I'm running a piece that is displaying a button instead of a label, which is working fine. My problem is when I try to attach the security event to the dynamically displayed buttons. It seems that the page just posts back and doesn't execute my code at all.

On my Page_Load, I'm running this after the buttons and labels are displayed:

For x = 0 to tblAccountList.Rows.Count - 1
'use a try to target the button, use catch to handle if it's instead a label, only one cell per row.
Try
Dim accountLink as Button = tblAccountList.Rows(x).Controls(0)
Addhandler accountLink.Click, AddressOf Me.PermissionViewCheck
Catch ex as InvalidCastException
Continue For
End Try
Next

I don't have any code checking for postbacks or anything like that, but the "PermissionViewCheck" event never fires and just reposts the page.

View 6 Replies

Web Forms :: Maintaining Attributes Of Dynamically Created Controls?

Mar 1, 2011

have some code which dynamically generates a number of drop down lists to provide the user with different options. The items in these drop downlists contain a value which is a unique id for that particular combination of options and a text component which just plain text but not neccessarily unique. I then have assigned a handler to these dropdownlists which is called on selected index changed to perform the relevant actions based on what options are selected. The problem is to make the system perform the correct action I need the unique ID from selectedValue of the drop down box but when it posts back it appears the selectedValue has been replaced to match the text of the item.

Dim dynDdl = New DropDownList()
dynDdl.ID = "ddlOpts" & i
dynDdl.AutoPostBack = True
AddHandler dynDdl.SelectedIndexChanged, AddressOf dynDdl_selectedIndexChanged
[code]...

View 1 Replies

Web Forms :: Dynamically Created Controls Not Accessible After Post Back.

Sep 17, 2010

dynamically HtmlInputCheckBox created and add in PlaceHolder(panel).

View 2 Replies

Forms Data Controls :: Dynamically Created Repeater Control

Dec 1, 2010

What I am trying to achieve:I am trying to take the value of the selected index and depending on what this value is (e.g. the case selection in the code below) run a different query on the dataset and then create a repeater control dynamically to output each row with an item template
that I can use css to style.

In other words: When a user choses a list item it shows only rows from the dataset that match the list item chosen. For example if a user choses Closed Tickets they only see rows from the dataset that have a STATUS of 'CLOSED'.

What I have done so far: [Code]....

What I'm struggling with at the moment is:

1) That the case selection works but the selection of the appropriate data from the dataset doesn't seem to be happening. And this data isn't getting stored in rows as I had hoped.

2) I'm not sure entirely how to display the dynamically created repeater control in the admin.aspx page.

View 5 Replies

Forms Data Controls :: Paging With Dynamically Created Gridview

Jun 29, 2010

I have a page that I am creating 5 separate GridViews on, depending on the button the user clicks, a different GridView will show up. On a few of the GridView's there is a need for paging, so in the CodeBehind I did the following
billingGridView.ID = "BillingGridView"

View 8 Replies

Forms Data Controls :: How To Get The Values Of Checkboxes Which Are Dynamically Created

Feb 8, 2010

I am new to asp.net. I am trying to display some data from a database table using dynamic table in my page. I want to add checkboxes to a field in the database and would like to perform several tasks based on the values checked. The checkboxes are tied with the primary key field of the database. Here is the code snipet :

[Code]....

Now I have a button in my page. The functioanlity which I desire is on clicking that button I should be able to extract the values of checked checkboxes and perform some function.

View 4 Replies

Forms Data Controls :: Add Checkbox In Dynamically Created Gridview?

Nov 1, 2010

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.

I am giving my code snippet for reference.

This is function to create Grid.

[Code]....

View 2 Replies

Forms Data Controls :: Add Value In A Dynamically Created Dropdown List?

Jan 11, 2010

I have a database with some data in. Now I'm trying to show that data on my page whit a ListView.

For each object from the database a ListView will generate a dropdownlist.

I also have a DataPager on my page and this is where the problem occurs.

Each object generated from the database has a field that may look like this example.: 1,2,3.

In my code now Im trying to split this string of comma character and add new items to my dropdownlist.

This works as long as I do not have DataPager on. But if I choose to view an x number of pages at the time when the page loads, I have value in the dropdownlists, only on my first page.

A piece of my code:

[Code]....

View 2 Replies

Web Forms :: Handling Dynamically Created Tables And Autopostback Controls?

Jun 17, 2010

I just can't wrap my head over this and don't have enough time to read long articles.

I already have an HTM Table on my form. I dynamically create New Roows and Cells and keep adding them to the Table .

The cells Contain Labels, Textboxes, Drop downs and Buttons. I also add Handlers to the dropdowns

The form loads perfectly the first time. But when I change the value in a drop down, on the postback, I get a msg saying that " There are multiple controls with the same name 'txtCheckin' . How do I handle this?

View 7 Replies

Web Forms :: How To Dynamically Create Event For Controls Created At Runtime

Jan 28, 2010

i am adding rows and cells dynamically to asp table control...and i wish to put extract a particular cell's of the row when clicked ...

i.e. on clicking on a particular row ..say i need its 2nd col's value to be passed as session variable for inter page communicaton..

View 4 Replies

Forms Data Controls :: Gridview Of Textboxes Created Dynamically?

Mar 4, 2011

I want to create a gridview with the first column being the Job Number and then a variable number of subsequent column which are fordates. This grid is a data entry for hours worked on a particular date for a particular job. I wrote the code to get the correct number of columns and column headers but I am having trouble getting textboxes into the grid cells.

public partial class _Default : System.Web.UI.Page
{
#region constants

[code]...

View 2 Replies

Forms Data Controls :: Append Row In Dynamically Created Table?

Jan 10, 2011

i am working on Accounting software.in this software i am to implement voucher entries form.In this form on page load a table (two rows and four columns) should be created after that one row should be appended to that table dynamically on button click event.

View 3 Replies

Forms Data Controls :: Add Datapager To A Dynamically Created Listview?

Aug 9, 2010

I have a listview control which is created dynamically, it is nested inside a repeater's itemtemplate. I'm trying to attach a datapager to it, which is also created dynamically but the datapager will not display and the listview will just display all its records in its entirety.

[Code]....

View 1 Replies

Forms Data Controls :: Gridview Created Dynamically Won't Page?

Mar 15, 2011

I have a menu. I use the menu's menuitemclick event to create a gridview (several actually) that is then added to a panel for display.The gridview paints perfectly until I try to add paging.I have successfully used paging and sorting declaratively for years, but this is my first attempt to do everything in code.When the gridview tries to databind, it throws an error:

[NullReferenceException: Object reference not set to an instance of an object.]
System.Web.UI.WebControls.GridView.get_StateFormatter() +25
System.Web.UI.WebControls.GridView.BuildCallbackArgument(Int32 pageIndex) +56

[code]...

View 7 Replies







Copyrights 2005-15 www.BigResource.com, All rights reserved