Web Forms :: Dynamic Controls Versus Building Dynamic Page
Jan 28, 2011
Lets say I have a Web Application with a menu of products. When a user clicks a menu item, then create and display a dynamic set of controls in an Update Panel. I am currently doing this however the PostBack and recreation of controls is tedious and resource intensive.
Not sure about this but is it possible to build a webpage with controls on it, then display it in update panel or IFrame? Then on post back you wouldn't have to recreate everything all over again?
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Similar Messages:
Aug 10, 2010
I have a dynamic Table which contain 8 rows and 8 Colums
Table t = new Table();
TableRow rr = new TableRow();
TableCell cc = new TableCell();
and in the each Cell CC I add a dynamic Button(Or Linkbtn)
LinkButton LB1 = new LinkButton();
LB1.Text = "AM";
LB1.ID ="Link1";
cc.Controls.Add(LB1);
rr.Cells.Add(cc);
LB1.Click += new EventHandler(LB1_Click);
t.Rows.Add(rr);
i have a table with 8 rows , 8 colums and each cell contain a LinkButton (which diffrent in IDs) I want to add Lable in the same cell of this LinkBtn(LB1) which it clicked but I cann't What shoud I write here?
void LB1_Click(object sender, EventArgs e)
{
// throw new NotImplementedException();
}
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Apr 1, 2011
I have a loop which creates for each item ID a Dynamic created checkboxlist control
how do I create a dynamic validation control on a dynamic checkboxlist?
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Jul 3, 2010
Im new to ASP.NET. Im trying to develop ecommerce web application and i found dynamic link building class and i dont understand how it works.
public class Link
{
// Builds an absolute URL
private static string BuildAbsolute(string relativeUri)
{
// get current uri
Uri uri = HttpContext.Current.Request.Url;
// build absolute path
[code]...
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Dec 20, 2010
I have an invoice form that I want to be able to populate using an ajax control. There will be a section at the top that will allow the user to select a record from a db or create a new one. This section will have several criteria types that can be used to select the records. They will be able to choose the record by the invoice id, date of service....etc.
I'm trying to decide between using the dynamic populate extender and the update panel for the different areas of the invoice. For example, there are different sections that show the customer's info, notes for the invoice, the services performed and the totals for the work done. I want each of these to be dynamic. For example, when a new service is added to the invoice the total is updated. Or if an existing invoice is opened these fields will be populated for that record.
I'm trying to decide if the dynamic populate extender or update panels should be used for each of these dynamic sections of the invoice. It seems like either can be used but I'm not sure which would be better.
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Oct 1, 2010
I've learned asp.net from books available on the internet, but I didn't find a good book that teaches you some techniques or logic to follow to build an administration area to control the front-end.I mean they talked about security, membership and roles. but still they didn't show you how to manage anything that's not related to a database, anything that's related to a database you'll probably create a page to display some info from a db with some SELECT commands and another page for the admin to INSERT, DELETE, UPDATEbut how can I connect to the other controls from my admin panel.for example : a textbox in the admin.aspx will edit the value of a certain label in display.aspx
another example : I built a web user control to retrieve articles from a DB and another control to be placed in the admin page, which will let the admin add new articles and it will insert it to the database, how can I add more power to the admin page to control the number articles to display on the page, or to control the sorting of the articles, etc...If i could get a name of a book that helps me with the logic or basics of creating a page that works like my admin panel to control the front-end it would be great,
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Aug 22, 2010
1. I have a GridView on my page and it uses sqldatasource with parameterized query. What I want to do is, on page load (where nothing has been selected so no parameter supplied), I want it to query everything (something like SELECT * FROM [this_table]) but since my SelectCommand is something like
SELECT * FROM [this_table] WHERE [this_column] = @someParameters AND [that_column] = @someParameters.
Can I play around with default value to achieve something like that but how ? Now, when the page loads, it doesn't show anything (No Gridview).
2. On my page, I made something like (username, gender, address, and more) and one single search button. That means, no single control enable auto postback. What I am trying to accomplish is building dynamic query
(if username specifed -> SELECT * FROM [this_table] WHERE [username] LIKE @username).
If both username and gender are specified (SELECT * FROM [this_table] WHERE [username] LIKE @username AND [gender] = @gender) and you know the rest. How can I do this using GridView and SqlDataSource ? To my knowledge, I can only specify one SELECT statement in a sqldatasource.
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Dec 11, 2013
I have a Webform with a TextBox (Static) and 3 TextBox (Dynamic - based on the following article: [URL].... )
How to use this scenario with a single GridView table?
Based on the User input, the GridView might have (1 + 3) columns; (1 + 6) columns; (1 + 9) columns; ...etc.
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Jul 24, 2013
im creating dynamic buttons on page load and on the click event of button1 handlere iam creating more buttons this is going fine but on click event of button 2 work is not done so how to maintain a chain of creation of button on click events
protected void Button2_Click(object sender, EventArgs e)//
{
ClientScript.RegisterClientScriptBlock(this.GetType(), ((Button)sender).ID, "<script>alert('Button_Click');</script>");
Response.Write(DateTime.Now.ToString() + ": " + ((Button)sender).ID + " was clicked");
}
protected void Button_Click(object sender, EventArgs e)//this button click will call all the items related to department
[code]....
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Oct 9, 2010
If there's a better way to accomplish what I'm attempting I haven't found it yet. That being said, I have create a gridview like the one here,[URL]And with some minor tweaking it working great for all my fields, checkboxes, etc. The issue is my last column is another gridview, and I'd like it to function the same. that is, a dynamic gridview inside of a dynamic gridview. I get that I have to create it initially with null values or it won't show up. I guess what I'm having trouble figuring out is instead of go will null data in the parent gridviews column, do I place my blank child gridview. Do I create and bind the child gridview first, or second. Generally just not sure. Also, as far as storing the data from the child gridview goes, will each one need it's own datatable?
[Code]....
[Code]....
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Sep 14, 2010
[Code]....
How can I get those dynamic textbox values from dynamic tables? I am working with a masterpage.
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Jul 28, 2010
So am adding fields in the code behind and now want to add required field validators. Kicker, I think comes into play becasue all this is in a master page. So even though I may set the id of the textbox to say tb4, it's no longer tb4. So when I add the required field validator and tell it the control to validate is tb4, I get the yellow screen of death telling me thtat tb4 does not exist... cause it's the long huge master page ID. What do I do?
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Feb 10, 2011
create db driven meta keywords/description. I would store these records in a database, xml format i presume; since it would be per culture.How would i go about doing this?
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Apr 20, 2010
I've added the Dynamic.cs file to my project and have set it's Build Action = Compile in order to get the System.Linq.Dynamic namespace.
However, when I try to use any of the new code I am getting an ambiguous call error; see below.
[Code]....
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Jun 14, 2010
I have a form with 4 dynamically TextBoxes. I have a Button with PostBackUrl set to another form. In that form I am trying to access the Dynamic TextBoxes using Page.PreviousPage.FindControl("PlaceHolder1").Controls.ofType<TextBox>(). But I am unable to access the dynamically created textboxes.Am I doing something wrong or is it a Limitation?
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Nov 14, 2010
I have a requirement like, There is a grid that has multiple rows. On clicking the "add to list" button, the columns from this grid is added to list of tables where source for one table in this list is read from grid view. note that, the grid view and tables will be having just two columns but the rows added to each table might vary.
I trying to implement this using GridView inside a gridview option but looking for some lighter way to implement this.
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Mar 18, 2010
I have following code and Javascript in my aspx page and my aspx page has a master page:-
<asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder1" runat="Server">
<script language = "javascript" type = "text/javascript">
function GenerateNew() {
var tblRow = document.getElementById("ctl00_ContentPlaceHolder1_tblRow");
var tr = document.createElement("tr");
var td = document.createElement("td");
var txt = document.createElement("input");
var theValue = document.getElementById("theValue");
theValue.value = parseInt(theValue.value) + 1;
i = theValue.value;
tr.setAttribute("id", "tr" + i);
td.appendChild(txt);
tr.appendChild(td);
tblRow.appendChild(tr);
}
function RemoveRow() {
var tblRow = document.getElementById("ctl00_ContentPlaceHolder1_tblRow");
var Val = document.getElementById("theValue");
for (var i = 1; i <= Val.value; i++) {
var RowToBeDeleted = document.getElementById('tr' + i);
if (RowToBeDeleted != null) {
tblRow.removeChild(RowToBeDeleted);
}
}
}
</script>
<asp:Table ID="tblRow" runat="server">
<asp:TableRow>
<asp:TableCell>
</asp:TableCell>
</asp:TableRow>
</asp:Table>
<input type = "hidden" id = "theValue" value = "0" /> <input id="Button2" type="button" value="Insert Record From JS" onclick = "GenerateNew()" />
<input id="Button3" type="button" value="Remove From JS" onclick = "RemoveRow()" />
</asp:Content>
This JS code generates a dynamic textbox and adds it to the existing table <asp:Table>. It works perfectly when I run it locally, however it doesn't work when I put it on the server.
This issue is only with IE, other browsers like Firefox and Chrome works perfectly fine locally and at server but IE works only locally not at the server. I am using IE 8 (OR 8.0.6001.18702 to be precise) and IIS 5.1.
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May 7, 2010
Asp.net gridview dynamic change pagesize not work on the last page.
I have added one dropdownlist in the pager of gridview and add event of selectedIndexChanged with the DropDownList.
Changing pagesize is working except the last page
We can have a look at this link:
http://marss.co.ua/DropDownListInPager.aspx
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Oct 28, 2010
So I have a GridView control with autogenerated column set to true, it also has autogenerated Edit and Delete buttons, sorting and paging, and also I am binding this same gridview to multiple data sources at runtime. All is working well.
Now I am adding a dynamically generated footer row at runtime. This footer row will allow users to add new record regardless which data source it binds to. So it is working as well except there's a small bug I couldn't figure out why. It's when I navigate to the last page of the gridview, if the rows on the last page is less than the page size, for example, I have page size 10 and the rows in last page is 9, then when I click the 'Add' linkbutton, the Add event does not fire, instead, it fill the last page with additional blank rows, that means if the last page has 5 rows, it will fill 5 blank rows below, if it has 9 rows, it will fill 1 blank row below. Then if you click the add again, it will work. If the last page already has 10 rows then, it works just fine.
Below is the code I used to dynamically add footer row:
[Code]....
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Jun 16, 2015
I have referred link [URL] .....
I need to add the dynamic dropdown on content page from content page itself,i have tried the below code its throwing error object instance property cannot be null.
protected void Page_PreInit(object sender, EventArgs e) {
//Create a Dynamic Panel
Panel pnlDropDownList;
pnlDropDownList = new Panel();
pnlDropDownList.ID = "pnlDropDownList";
[Code] .....
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Jan 7, 2011
I have a project where I need to create menu buttons from a list in SQL Server. The problem I am having is that I need to add code to the text of those buttons. So there would be a birthday button and it should display the number of birthdays within the next two weeks or a button with the number of upcoming events.
Clarification:
There is no code yet, just some requirements. What I am doing is querying a table to get the list of buttons to display. Now each of these buttons may have dynamic text, for things like count of birthdays, events,etc... I am trying to see what the best way would be to handle this. Should I embed a snippet of code to go along with the menu item to execute when I iterate over the menu items? Maybe I should build a javascript file to go along with the code, which I add code to query a service for certain menu items?
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Feb 20, 2010
I am adding controls dynamically in my webpage.
I add them in onload method.
everything is working fine..
But I m a bit confused about how it works..
I have read in so many articles that all controls get their values from viewstate before load event. Then how my dynamically added controls get their values when i am adding them in OnLoad event ie after LoadPostData event.
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Feb 23, 2010
i have a page where i have a search area for users and a blank table. When a user performs a searcg,im creating in the cs the rows for the table and adding in the cells textboxes with values from DB. The textboxes ID´s are also being retrieved from the DB. Then, the user can change values from the textboxes. I also have an asp button that´s supposed to save the changes BUT i cant manage to persist the ids and last values between postback. Ive tried something ClientScript.RegisterArrayDeclaration but the array comes up empty. Then i used a hiddenfield but does the same trick.
what am i doing wrong?I add the hiddenfield,i try to add all the controls ids to an array but seems impossible,and there is no way i am getting the last values in another array. Im loosing everything between postbacks, but if i manage to save these ids and values, ill re-make the table in a sec.
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Nov 4, 2010
Problem: Content Page with Wizard Control with UpdatePanel and Placeholder. Above the UpdatePanel is a DropDownList. I need to display different input controls below the drop-down list when the user changes the selection in the drop-down list. When the user clicks 'Next' on the wizard control, I need to be able to get the data out of those dynamic controls as well.
I know all the dynamic controls have to be created in the OnInit method in order to get the data back from those controls during the postback. However, when the drop-down list's SelectedIndexChanged event is fired, the OnInit method is called... then the PageLoad... and finally the handler for the SelectedIndexChanged event is called. ViewState hasn't been restored until well after the OnInit & PageLoad methods have been called, so there is no way to know what the user chose in the list box at the time OnInit is called... which exactly when I'm required to create the dynamic controls.
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Mar 11, 2010
so you will have to bare with me, but I've been trying to figure this out for a month now and I'm getting to my wits end.Basically, all I want to do is take a field of an MS-Access database and display it as the page's title. Currently I have a sub page_load to display the content from the database on an id autonumber basis. The info for this is displayed using formview.Ive tried numourous different ways and scoured the net, but unfortunately cannot find a simple way that dosen't get highly confusing.So now for the title, I'm trying to run this below, but am getting a whole bunch of errors.
My database is "dblatesteditorials.mdb"
table is "editorialpage"
field is "header"
[code]...
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