I have code to add a control to page in Init event. I hit error "The control collection cannot be changed during DataBind, Init, Load, PreRender and Unload phrase".
The control collection cannot be modified during DataBind, Init, Load, PreRender or Unload phases.
I'm trying to programmatically add a user control to an aspx page.
the problem is that any postback that happens on the page(even if i added the user control to an updatepanel) clears the user control from the page.
this happens also if the postback is generated from the user control itself.
I am trying to add a user control into a div at runtime. I can add the control no probelem but it overwrites the previous control added.Basically, I am trying to add passengers to a travel system - the passenger details are in the user control and I don't know in advance how many there will be. I have an add new passenger button which should append the new user control into the div without overwriting the previous passenger. The code is c#/.net 4. I have tried to save the control data into viewstate and re add it with the new one but that also doesn't work. Here is a snippet of the code I'm using
foreach (Control uc in p_passengers.Controls) {
Passenger p = uc as Passenger;
if (p != null) {
p.SaveValues();
}
}
however, p.SaveAs() (just writes the control values into ViewState) is never hit.
exactly like cms , i want to create page programmatically with this options:1: page-name2: add template (master-page)and etc...
View 6 RepliesI have a custom templated control as follow:
[Code]....
How do I programmatically add control into the templateOne?
I am adding validator controls to a page on runtime. When I do this it seems to work except for one thing: the page doesn't get validated (the Validate() method is not invoked) - neither on the client nor on the server. However when I can Validate() myself, the validators do their work and generate the required errors. So it looks like the simple fact of adding a validator programmatically causes the page validation to not take place. My page does have validators in the aspx file - they work fine when I don't add any programatically, but as soon as I do add one programatically, the Validate() method is not invoked.
The way I add the validators is by creating an instance, giving values to all relevant properties, and then adding to the page control collection. I tried this in the PageLoad, and prior page-cycle events. The same result occured. I also tried with or without having a ValidationGroup, and with or without having a ValidationSummary control on the page. The same result occured.
I've an asp menu on my site. I need to dynamically populate this from my database depending on a choice made by the user.
Basically, when entering the site the User chooses a product category and this selection determines the options in my menu. I'm totally lost as to how to populate my menu each time the user changes their category - I've only ever hardcoded in the values to a this menu type so I've no idea how to programmatically populate it.
From what I can gather, it seems that its best to populate the menu via XML - if this is so could someone post a sample of what this XML structure (or let me know ehere I can view this)
I have a div runing on server in which i programmatically add images. On post back, id like to get some attributtes from those images, but they are nowhere to be found. What am i doing wrong?
[Code]....
[Code]....
Is this possible and how?
I would like a single button that will fire a loading of a user control into a panel to simulate a wizard-type functionality.
I am creating a Table Control programmatically and I want after user clicks a button to get the values.
The table has three columns, {Title(DropDownList), FName(TextBox), LName(TextBox)} and two rows.
I am getting the values for FName, LName without problem, but I am getting wrong value for Title, which is a DropDownList. It gives me for both Titles, the selected value of the second column.
More Clear
For the 1st row --> Mr, Foo, Bar
for 2nd row- -> Mrs, Foo, Bar
after user clicks the button I am getting
For 1st row --> Mrs, Foo, Bar
For 2nd row- -> Mrs, Foo1, Bar.
This is the method of table creation
[Code]....
I would like to use a C# foreach loop to access a column in all records in one of two tables that can only be determined at runtime. I have used the foreach command with arrays, but I don't know how to use it with a table in an SQL database. I was using a query command and Reader inside of a do-while loop that fails after all records had been read.
View 3 RepliesHow can I set the value of WizardStep.IndexOf() programatically? eg.
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I have some labels on my web page and I need to hide some of them programmatically.my code
protected void panelLegent_Load(object sender, EventArgs e)
{
lbl_A.Style.Add("display","none"); // It's works
[code]...
I am using Report.net
I can test the application locally and it works. But once I publish the application on my IIS6 web server the PDF does not generate or output. Is it a PDF Mime problem? What is causing the application not to output the pdf once it goes to production. My IIS6 has Adobe Reader and I added the PDF Mime.
how do I create programaticaly an HTM page (for exaample 5.htm)
View 1 RepliesIs there any way to create/delete/update a aspx page programmatically using C#?
View 3 RepliesI would like to programmatically hide/unhide Individual Menu items.
How is this best accomplished. I see that intellisense does not have a visibility attribute for Menu1.Items(1).
I'm trying to programatically reference a FileUpload control which I have within an ItemTemplate. I get a 'Name FileUpload1 is not declared' error message. Code below:
Code is as follows:
[Code]....
[Code]....
Im using vb.net 3.5, ajax, sql 2005, been programming a while but still consider myself a novice an need some advice. Im building a cms type tool for a knowledge base. And on one of the web forms i need to be able to allow the user to add a set of controls each time they click on a button, the controls they add will be fixed, a set of 3 textboxes. I then need to be able to run a for each loop to check that they have populated the textboxes before running an insert via the tableadapters insert method.
View 5 RepliesWhen trying to populate a Chart control in asp.net 4.0, I cannot seem to get it to show the data in the way I want to.
This is the table (DataTable) I want to DataBind to the chart control:
[code]....
I want to represent this table in a chart control. How can I do this and make my code dynamic?
How to Populating the Menu Control programmatically Using an XML File,
View 5 RepliesFor reasons, I have an <a> tag in my master sheet rather than an ASP link. I want to access this html control from the server when a post back happens and change its style sheet. I have tried many a thing but as yet am still unsuccessful.
in short this is what i can't do but want to...
page.form.controls.item(0).sytle = "bob"
..but can't.
I need to post data from my asp.net page to a non-asp.net page that is offsite. How can I do that without redirecting to that page? IE: not using a button's PostBackUrl property.
View 8 RepliesI have a usercontrol hosted on a page, registered through the web.config.
On the host page, I would like to programmatically reference the my public propeties of the user control in the codefile.
Can i run all validators when page is loaded. I need to show * in all input text fields that are necessary. I have require field validators for that fields, can i run it by default when page is loaded?
View 3 Replies
