Web Forms :: Dynamic Controls Depend On Type Of Control?
Apr 8, 2010
I then found an excellent tutorial with code! It is the following: [URL] It works perfectly but only with TextBox controls. Change the TextBox to Label and it doesn't work (neither will ListBox). I have been trying to get it to work and it may have something to do with ViewState not being enabled for these other controls. I managed to get around the MasterPage and container problems, but can't get it to work with either Labels or ListBoxes. (As I understand it, the Load View State stage is not re-populating the controls from the previous time it was posted for these other two controls.) Does anybody know how? If I could get the C# code working (with Label instead of TextBox, e.g.)
I need to check whether the request will return a 500 Server Internal Error or not (so getting the error is expected). I'm doing this:
HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest; request.Method = "GET"; HttpWebResponse response = request.GetResponse() as HttpWebResponse; if (response.StatusCode == HttpStatusCode.OK) return true; else return false;
But when I get the 500 Internal Server Error, a WebException is thrown, and I don't want to depend on it to control the application flow - how can this be done?
Values for multiline textbox in gridview are coming from SQL db "text" type previously entered by user...sometimes a small amount, sometimes a lot. Want to display enough to make it readable without wasting space on the screen. Can't believe this mechanism is not built in but have researched & see I may have to count lines then set the "number of row" property.
Question 1: Should this be done in databound or rowdatabound event?
Question 2: Could someone provide the "row counting" code (in C#)?
I want to do something like www.mysite.com/subsite, www.mysite.com/subsite2 etc
subsite/subsite2 are not actual directories. I did something like this previously using a custom 404 error page. I'm just wondering if there's a better way to do this now, especially in vs2010/.net 4.0 ? Or would using a custom 404 still be the best method?
I have different roles like Administrator ,Accountant, Clerk,Enforcment When user open Catalog Zone to add parts to Web part Zone i want only those parts should apper on the screen for which user selected Group,like if user selected Enforcement Group then Parts of that group should only appear in the Catalog Zone.
I want Catalog Zone cantains to be depend on which Group user was selected.
I am developing a call center application. The way it works is it read records from a database and from these it creates dynamic questions and either textbox or dropdown controls on one of about 5 tabs. The questions can change depending on the previous answers, thats why they need tgo be dynamic. The issue is the postback will loose the controls I have created. I thought about maybe just keeping a hashtable of the controls in the session and then recreating them each page create. The trouble is the page flicker. what the best way to handle this ??? I've though about update panel manipulation but nothing seems to work the way I need it to.
I have a page in which I am to add dynamic controls (labels, textboxes) at run time as per request(any number of controls can be added as per request, just for timebeing i have fixed it with value 3).
I have two button on my page "Submit" and "Cancel". which will be disable only when atleast one textbox is not null otherwise buttons should be disable.
i use 2 dropdownlist with 2 object data source first dropdownlist to display departments name using object datasource (field to display DeptName , value of field DeptID)
second dropdownlist to display Employee name but depend on departments (field to display EmpName , value of field EmpID)
how to display employee name in dropdownlist depend on departments name in the other dropdownlist
2 tables
1 table deprtments with column (DeptID , DeptName , DeptDescription)
2 table Employee with column (EmpID , DeptID , EmpName)
Im binding an image to a repeater and giving the image id a unquie value based on the id from the database. The problem im having is trying to find the control within the repeater as i dont know the exact id of the control as its generated at runtime.
What im trying to do is count how many items are bound then after the first one assign a new css class to the rest.
How am i able to find the controls id on itemDataBound ?
I have a two buttons ( button1 and button2 ), a panel ( panel1 ), a label ( labe1 ) on my Web page ( coded with asp.net and c# ). I want to create 2 textboxs on my page when I click on button1 ( button1_click ).
After that, when I click button2 ( button2_click ), I want to get data of textbox (added on runtime) and write them on label1.
This application is part of my master application. This is very important for me...
I have static html paypal buynow button that works great, but it's static.
[Code]....
But it is possible to change the values for the hidden inputs from .net codebehind code? I found this post which takes a different approach of sending these hidden fields instead as a query string to paypal. Not sure I like that though as would this not possiby explose some of those fields like the return page?
Basically what id like to do change the important parts of the button and info I'm sending to make it dynamic.I know I can do something like this in the markup, but that would mean having to fetch data mulitple times was hoping I could somehow adderss the field values directly in the codebehind. Or possibly dynaically generate and insert the entire changing input type fields from the codebehind
Possible to add them with something like this: myform.Attirbutes.Add (???). If so how do I contruct these input types in .net?As far as return logic security, I've tested that it's solid, i just need to automate the button process so I don't have to create a buy now page and button for each product.
I have created a formview with 4 dynamic controls fields that LINQ to a database.
rentfoodutilitytotal
There's an event handle for each of the first three fields whenever a text change with following codes:
' extract textbox from both SubTotal and the modified field tboxSubtotal = FormViewAssistance2.FindControl("totalTextBoxEdit") tboxModifier = FormViewAssistance2.FindControl("foodTextBoxEdit") 'extract string from those textboxes txtSubtotal = tboxSubtotal.Text txtModifier = tboxModifier.Text 'convert text to double and add them together Double.TryParse(txtModifier, dblModifier) Double.TryParse(txtSubtotal, dblSubtotal) dblSubtotal = dblSubtotal + dblModifier 'post the changes back to SubTotalTextBoxEdit 'totalTextBoxEdit 'EditorPart.ReferenceEquals("totalTextBoxEdit", dblSubtotal) 'PostBackTrigger.ReferenceEquals("SUBTOTRECTextBoxEdit", dblSubtotal) 'EditorZone.ReferenceEquals("SUBTOTRECTextBoxEdit", dblSubtotal)
I'm stuck on how to post/update totalTextBoxEdit to reflex changes in first three fields without having user clicking Update button to save the information into database. I've tried above 3 statements but none of them is working.
I have a gridview where I in codebehind add a templatefield
[Code]....
In my update command when i try to find the "Result" textbox I get a null object [Code]....
In the gridview there is another templatefield "Name" that consist of two boundfields("Firstname" and "Lastname") This column is added in the design phase and not in the codebehind.I don't have any trouble finding these controls using the ID added in the markup [Code]....My issue is with the result column that I add in codebehind.
I have a gridview and basically at page load I want it to display with an empty row. The first field in the gridview would be a template field containing a textbox. I wan't to be able to type in, for example, a product code ('abc'). This would be the parameter for the stored procedure and then the rest of the columns (40+ additional columns) in the gridview would populate with the rest of the data pertaining to that product code (i.e. price, unit of measure, etc.). In short the template field texbox is the control to bind the gridview.
After the row is populated I could click a button or link that would add that entire row to my gridview and then add another empty row where I could enter another product code... populate the row then add that row to the gridview. and so on...
I am Developing a database web applicationI am Creating web controls on page at runtime i.e in Page_Init event. No textbox are placed on .aspx page at design timeI have a datatable filled with a single record.now i want to bind a textbox (created at runtime) with a column of datatable so that when a page is loaded value in datatable's column is displayed in textbox.Other Important thing i want is when i make any changes in Textbox, It should be reflected automatically in a column to which textbox is binded. So while saving records i can save it directly from datatable. I dont want to write following tedious code before savinge.g.
And then I try to add some dynamic controls into the placehold control from code behind, I use the RowDataBound Event
Private Sub GridView1_RowDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs) Handles GridView1.RowDataBound Dim ph As PlaceHolder = CType(e.Row.Cells(1).FindControl("PlaceHolder"), PlaceHolder)[code]....
The problem is the button CommandName is not functioning. And more strangely, if I add the button manually into the placeholder, like this: Grivdivew ItemTemplate PlaceHolder[code]....
I am dynamically loading user controls into my main page on button event.The user control has a textbox and a gridview When i enter data in textbox , the autopostback event fires and loads data into the gridview. when i load another instance of user control and do any post back the gridview data is not persisting.Until and unless I bind the data, gridview is not having any data after postback.This is creating issue when I al updating a row in gridview as data is not persisting after postback.
I have numeric textbox1, numeric textbox2 and numeric textbox3, where textbox3 should show the value that is the multiple of textbox1 and textbox2. The textbox3 should change dynamically when the values in the other two change.
I have a FormView that allows a user to register for a company event. I want to do a couple of things with this form.
1. I need to write this data to a MS SQL database
2. I need to send an email confirmation of their registration to their email.
I know how to do both of these things, but i am having trouble doing both at the same time.
It would be nice if I could do it in one click, but I coded it into two pages to try to help simplify it.
The first page allows the user to input their information into a formview and when they click the submit button, it places those answers into session variables:
[Code]....
[Code]....
The Second page confirms the users information by taking those session variables and placing them into labels:
[Code]....
[Code]....
However, after I place information into the formview on the first page, it throws up this error:
"Conversion from type 'TextBox' to type 'String' is not valid".
