Forms Data Controls :: Dynamically Changing A GV?

Nov 15, 2010

I have a grid view that I want to dynamically change based on data in my page. Specifically I want to change one of the title items and I want to hide a column based on a certain condition.

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Forms Data Controls :: Changing Item Value Repeater Dynamically

Nov 1, 2010

How do i dynamically change the value of dataitem in repeater control(.net 2.0,VS 2005)..i have repeater something like this :

<asp:Repeater ID="rptGameInfo" runat=server OnItemDataBound="itemDataBound_rptGameInfo" >
<HeaderTemplate >
<ItemTemplate >
<asp:Label ID="lblLoc" runat=server Text="Location:" ></asp:Label><%# Eval("GAME_LOCATION")%><br />
</ItemTemplate >

and it shows the result like this:


If location is "Select" i want to change it to "n/a". So i am trying to capture it in itemDataBound even something like this

if ((e.Item.ItemType == ListItemType.Item) || (e.Item.ItemType == ListItemType.AlternatingItem))
DataRowView row = e.Item.DataItem as DataRowView;
string location = row["GAME_LOCATION"].ToString();
if (location == "Select")
// e.Item.Text = "n/a";>>

Does e.Item some 'text' sort of property ,i can set the value to?

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Forms Data Controls :: ListView Changing CSS Class Dynamically

May 17, 2010

I have a aspx where i have thumbails of pictures in listview, once i click on a picture, picture shows up as big next to list view. Now what i want to do is, have a red color border around the thumbail of picture which is show big at the center. check the Picture I just want to change the CSS class of the image selected in the listview. I get to know which image id is selected through query string PageNO or if <%#Eval("PageNo") %> is =2 then second image css class should be redBorder else imgBorder1 ASPX Page


Code Behind:


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Forms Data Controls :: Dynamically Changing The ReportViewer (with An ObjectDataSource)?

Jun 1, 2010

I have a simple web form with a dropdownlist and a ReportViewer. I would like to dynamically change the report within the viewer when the user makes a selection in the dropdownlist. I think I need to alter the ObjectDataSource that the ReportViewer is using. I've tried a few things without success.

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Forms Data Controls :: Dynamically Changing The Skin ID Of The Gridview?

Aug 25, 2010

How to change the skin ID of the dynamic controls

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Forms Data Controls :: Changing Background Image Of A Datalist Dynamically?

Feb 2, 2010

Is it possible to change back ground image of a datalist at run time??

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Forms Data Controls :: Changing A GridView's ItemTemplate Label Text Dynamically

May 7, 2010

I'm trying to change the text of a GridView label in an ItemTemplate and I am having some issues. I searched all over and can't find a solution. This is what I am trying to do...

I have a GridView that has a comment field. Normally when the page is rendered the comment field is truncated using a truncate class that limits field length. The full contents can be displayed in a tooltip when the comment field is hovered over. That part works fine.

I also have an export to Excel class that will take the Gridview and export it to Excel and that part works fine as well...

Now the issue... Because of the truncated field, when I do an export it will export exactly what is in that field, the truncated version of a comment. When the export button is clicked I need to change the .text value of the label that is in the GridView ItemTemplate

From this truncated version...


And then back again after the export routine is complete.

I have accessed the contents of a label before using FindControl but never set a value, is this possible? Also, I have captured what is in the comment field on RowDataBound but by that time, it is already truncated.

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C# - Store Dynamically Changing Data Into Server Cache?

Apr 7, 2010

EDIT: Purpose of this Website: Its called It is a third party utility for a game called The site currently has over 12k users to it an I run the site. The game is fully text based and will always remain that. Users copy and paste full pages of text from the game and paste the copied information into my site. I run a series of regular expressions against the pasted data and break it down. I then insert anywhere from 5 values to over 30 values into the DB based on that one paste. I then take those values and run queries against them to display the information back in a VERY simple and easy to understand way. The game is team based and each team has 25 users to it. So each team is a group and each row is ONE users information. The users can update all 25 rows or just one row at a time. I require storing things into cache because the site is very slow doing over 1,000 queries almost every minute.

So here is the deal. Imagine I have an excel EDIT(Excel is just an example of how to imagine it, I don't actually use excel) spreadsheet with 100 columns and 5000 rows. Each row has two unique identifiers. One for the row it self and one to group together 25 rows a piece. There are about 10 columns in the row that will almost never change and the other 90 columns will always be changing. We can say some will even change in a matter of seconds depending on how fast the row is updated. Rows can also be added and deleted from the group, but not from the database. The rows are taken from about 4 queries from the database to show the most recent and updated data from the database. So every time something in the database is updated, I would also like the row to be updated. If a row or a group has not been updated in 12 or so hours, it will be taken out of Cache. Once the user calls the group again via the DB queries. They will be placed into Cache.

The above is what I would like. That is the wish.In Reality, I still have all the rows, but the way I store them in Cache is currently broken. I store each row in a class and the class is stored in the Server Cache via a HUGE list. When I go to update/Delete/Insert items in the list or rows, most the time it works, but sometimes it throws errors because the cache has changed. I want to be able to lock down the cache like the database throws a lock on a row more or less. I have DateTime stamps to remove things after 12 hours, but this almost always breaks because other users are updating the same 25 rows in the group or just the cache has changed.This is an example of how I add items to Cache, this one shows I only pull the 10 or so columns that very rarely change. This example all removes rows not updated after 12 hours:

DateTime dt = DateTime.UtcNow;
if (HttpContext.Current.Cache["GetRows"] != null)


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SQL Reporting :: Dynamically Changing The Path / Data Source For A Reportviewer?

Nov 12, 2010

I have a reportViewer control and I dynamically setting the report path and dataset in the page load event if it is not a post back. This first report displays without issue. However, when I attempt to change the report path / dataset via the onChange event from a dropdown list I get the following error:

A data source instance has not been supplied for the data source "Summary_DataTable1".

This code works fine and the summary report is displayed the first time the page is loaded.


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DataSource Controls :: Dynamically Changing Linq To Sql Sproc Names?

May 12, 2010

I have to be able to dynamically change the sproc name that is used in a Linq to SQL query. I see in the dbml designer this:


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DataSource Controls :: Dynamically Changing SqlDataSource.SelectCommand From FormView.ModeChanged?

Nov 17, 2010

In an 3.5 web app, I have a page with the following markup/code (this is the brief version, but I believe I got all the relevant info).


The form contains 2 different record types, accessed using the paging controls, depending on the ParentSR field; a parent SR will be something like '1234' while its sub-record will be something like '1234.1'. There are only a few differences in the fields used between the 2 different record types and that is why they are stored in the same table. However, the activity depends on the record type. When browsing from the parent record to the sub-record, the itemtemplate loads fine (notice in the formview's datasource
query, that the sractivity_id field is being pulled along with the subquery value). But when going to edit the record, the page throws an error:

System.Web.HttpUnhandledException: Exception of type 'System.Web.HttpUnhandledException' was thrown. ---> System.ArgumentOutOfRangeException: 'ddlActivity' has a SelectedValue which is invalid because it does not exist in the list of items.

If i click 'back' and retry, it may take 3 attempts, but then the edittemplate will load just fine. I should also point out that this error does not always occur. I've been trying to figure this out for a couple months and it is driving me nuts, mainly due to the fact that I can't reproduce the error in development--it seems to only occurr in production. Anyone with any thoughts on what is going on?

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Web Forms :: Changing Font Size Dynamically?

Mar 8, 2010

We have a database with around 5000 records in it. We also have a web page that displays many of the fields. One field is an nText field and displays up to several paragraphs. My customer wants me to add those A+ and A- buttons for increasing and decreasing the font size for this field. My problem is that many of the older records have quite a bit of formatting in the field. Most of the rest contain styles dictating a font size of 12 px. Is there a way to increase and decrease the font soze of the text without modifying all the records?

Here's an example:


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Web Forms :: Dynamically Changing Master Page

Aug 19, 2010

I'm working on a project that have 3 diffrent type of users with 3 diffrent master pages. I can verfiy there access level and let them view pages but after googling I came accross a tutorial form but it wasn't very helpfull the code I got listed below works only if the session is at null, It dosen't seem to pull the session value.


there is a class page attached to it but nothing seems to work. I've downloaded the tutorial but it wasn't any clearer than what I read.

I 'm just trying not to have to code over the joint pages.

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Web Forms :: Dynamically Changing ImageUrl In HyperLink Control?

Oct 15, 2010

I'm writing a script and need with being able to modify the ImageUrl property in a HyperLink control from the code behind page. It is meant to dynamically show an image.

I just need to know the correct format of the code behind to get this to work.

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Web Forms :: Changing Masterpages And Themes Permanently But Dynamically Using An Admin Interface?

May 15, 2010

So I have a couple of Masterpages as base templates and a couple of themes that can be applied to either one of these masterpages. Using profiles, global.asax and some code behind I can change the Themes dynamically but they are associated with the profile. In other words, once the user logs off, the theme is changed back to default.

My objective is to use an Admin page to

1. change the theme of the site permanently for all users, including anonymous visitors.

2. change the masterpage for all pages permanently for all users, including anonymous visitors.

So when I log off after changing the settings, the new settings are retained.

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Web Forms :: Dynamically Connect To Multiple Databases At Runtime By Changing Connection String?

Nov 14, 2013

i have a dropdownlist contaning i want to connect my database by dropdown selection.if i select 2013 it will connect 2013 database ,if i select 2014 it connect 2014 so on..

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Changing SessionID Dynamically In C#?

Jan 29, 2010

if there is a way to dynamically change the session ID from the context of a SessionStateStoreProvider (or some other customizable module) in C# for ASP.NET.

I am implementing a custom SessionStateStoreProvider, and I was thinking about augmenting the session ID to tell the store provider where to go look for a session. I've implemented a custom SessionIDManager, which lets me augment newly created session IDs with the required tag. The problem is that the desired value of that tag might change during the life of a session. For example, the session may be read from one location, but may need to written to a different location. In this instance the ID would have originally been tagged for location A, but on writing the store would want to write to location B. The tag should be updated to reflect location B for the next session read.

So, from the context of SessionStateProviderBase override...

public override void SetAndReleaseItemExclusive(HttpContext context,
string id, SessionStateStoreData item, object lockId, bool newItem)

... is it possible to change the session ID? I know that the HttpContext.Session.SessionID property is not settable. Is there some other way to feedback an update like this? Or is there a more appropriate to carry state like this across calls?

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MVC :: Dynamically Changing Style On Li?

Feb 3, 2011

this may or may not be a big deal but what I am looking to do is based on some data returned to my view I want to change the background-color to what value is being returned. Black, Yellow, etc.... How can I in my aspx page set my Style background-color based on this value in the model. I know Attributes are used in Web forms control but not sure in MVC how to do this

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Changing Gridview Columns Dynamically?

May 13, 2010

I haven't had any luck finding the answer yet. My problem is that I want to be able to update the dataformatstring on a gridview column at runtime. For example, I switch from displaying # of units to cost of said units... and I want to change the format of the column to {0:c}. It seems like it should be a simple task.

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MVC :: Sample For Dynamically Changing Theme?

Dec 16, 2010

Good sample for dynamically change theme in MVC 3 RC 2 (Razor).

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C# Dynamically Changing Master Pages

Sep 11, 2010

You fetch the user's IP address and based on his/her country you redirect the user to a specific webpage. Now, how do you change the master page dynamically? This is how I am redirecting the user :-

Geolocation Error with IP Address

It's not like the user clicks some button or something and you then change the master page. I want it changed when the user is redirected, so how exactly do I go about it?

public partial class testClass: System.Web.UI.MasterPage
protected void Page_Load(object sender, EventArgs e)
if (redirected to site1)
Use this master page1
if (redirected to site2)
Use this master page2

So how do I check what SITE the user has been redirected to? Also HOW to apply the specific master page now that the user has been redirected?

I just need an idea how to go about it.

[EDIT] please check the code block below. How do I fetch the URL that the user has been redirected to? I actually need just the "iso3166TwoLetterCode" variable's value (see the link to my earlier question, please) and based on that will be changing the master page. I can't figure out how to fetch that value or even use that class (that's got this variable) in my testClass.

protected void Page_PreInit(object sender, EventArgs e)
if (user Has been redirected to )
this.MasterPageFile = "master1.master";
if (user Has been redirected to )
this.MasterPageFile = "master2.master";

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C# - Dynamically Changing The Component Of Webpage?

Jun 15, 2010

I am working for a project on disaster management sponsered by World Bank, under this project i have assigned work on CMS. and my senior has asked me to make a ASP.NET webpage where those logged with administrator privilege will be able to edit the page.


<div id="mydiv"><pre>+++++++MY CONTENT+++++++++++++++++++</pre></div>

now if if the admin clicks on mydiv he should be able to edit the pre contents.

for this i got many options such as WYSIWYG editors (but they work on textboxs only and further more they cant save the data back to server replacing the previous content) then I came to know about Webparts , but its editing capabilities was so low that my plan for implementing a WYSIWYG editor went in vain.

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C# - Dynamically Changing Master Pages / Getting Thread?

Sep 13, 2010

I created this master page file and in its Page_PreInit added the code to change master page at run time after detecing a visitor's country:-

Now, while researching I came across this thread that says "Setting the master page in Page_PreInit event is against the design and spirit of MVC..what is this supposed to mean ???

If not this way, how else am I supposed to change master pages at run time???

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Changing CustomErrors In Web.config Semi-dynamically

May 24, 2010

The basic idea is we have a test enviroment which mimics Production so customErrors="RemoteOnly". We just built a test harness that runs against the Test enviroment and detects breaks. We would like it to be able to pull back the detailed error. But we don't want to turn customErrors="On" because then it doesn't mimic Production.

I've looked around and thought a lot, and everything I've come up with isn't possible. Am I wrong about any of these points?

We can't turn customErrors on at runtime because when you call configuration.Save() - it writes the web.config to disk and now it's Off for every request.We can't symlink the files into a new top level directory with it's own web.config because we're on windows and subversion on windows doesn't do symlinks.
We can't use URL-Mapping to make an empty folder dir2 with its own web.config and make the files in dir1 appear to be in dir2 - the web.config doesn't apply. We can't copy all the aspx files into dir2 with it's own web.config because none of the links would be consistent and it's a horrible hacky solution.
We can't change customErrors in web.config based on hostname (e.g. add another dns entry to the test server) because it's not possible/supported. We can't do any virtual directory shenanigans to make it work.

If I'm not, is there a way to accomplish what I'm trying to do? Turn on customErrors site-wide under certain circumstances (dns name or even a querystring value)?

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Dynamically Changing Page Title Not Working?

Jul 29, 2010

I have 3 aspx pages (page1.aspx, page2.aspx, page3.aspx). I also have a usercontrol for meta tags and page title. The usercontrol is called MetaTitle.ascx. This user control is being used in many pages. So I want to change a page title <title> dynamically in this usercontrol. But its not working. Here is the code:




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