Advertisement

10.29.2007 at 11:23PM PDT, ID: 22926228
[x]
Attachment Details
[x]
The Solution Rating System

With so many solutions, how can you tell which solutions are most likely to help you and which ones are not? To provide you with a tool to use, we rate our solutions based on various elements that most accurately determine if a solution is a quality solution. To explain what factors affect the solution rating, here are the elements we take into consideration when formulating our solution rating.

  • The Grade of the Solution
  • The Zone Rank of the Expert Providing the Solution
  • The Number of Author and Expert Comments
  • The Number of Experts Contributing
  • The Feedback of the Community

Your Input Matters
Because of the way the system is set up, the most important variable in this equation is you. As a member of Experts Exchange, you are able to cast your vote on the quality of the solutions in regard to how complete, accurate, helpful and easy to understand each solution is. When you provide your feedback, each rating is adjusted accordingly. So, if you see a solution that has a poor rating that you think is a good solution, let us know by rating it. As you do, the rating will be adjusted and will become more accurate for other members of our site.

If you have any suggestions that you would like to make for our rating system, please ask a question in the Suggestions Zone of Community Support.

Thank you!

Bind a label's backcolor to a database field

Tags: cast, backcolor, bind, database, label
Hi,

Using ASP.Net and Visual Studio 2005, I am attempting to dynamically change the backgournd colour of a label.

In the smart tag for the Label, I have selected 'Edit Databindings'
Then I have selected the Backcolor property, and assigned to a column (WebColour) from my table.

It has added this code to my label tags:

Backcolor='<%# Eval("WebColour) %>'


I've tried three different data formats in my table:

#000000
000000
0

All of them result in a 'specified cast is not valid' error at the backcolor tag.


When I type

? Eval("WebColour)

in the command window I see the exact data that I am expecting.


Can anyone tell me what format this needs to be in in that database?

Also can you tell me what the # symbol is doing in the statement... I understand the rest.


The label is inside a FormView control which is working fine in every other way.


Start your free trial to view this solution
Question Stats
Zone: Programming
Question Asked By: nmcdermaid
Solution Provided By: CONCEPTINFOTECH
Participating Experts: 3
Solution Grade: A
Views: 21
Translate:
Loading Advertisement...
10.29.2007 at 11:29PM PDT, ID: 20175058

All comments and solutions are available to Premium Service Members only.

Start your 7 day free trial and see for yourself why Experts Exchange is the easiest and most proven technology resource in the world. Get Started

Already a member? Login to view this solution.

 
10.29.2007 at 11:33PM PDT, ID: 20175067

All comments and solutions are available to Premium Service Members only.

Start your 7 day free trial and see for yourself why Experts Exchange is the easiest and most proven technology resource in the world. Get Started

Already a member? Login to view this solution.

 
10.29.2007 at 11:37PM PDT, ID: 20175072

Rank: Wizard

All comments and solutions are available to Premium Service Members only.

Start your 7 day free trial and see for yourself why Experts Exchange is the easiest and most proven technology resource in the world. Get Started

Already a member? Login to view this solution.

 
10.29.2007 at 11:38PM PDT, ID: 20175075

Rank: Guru

All comments and solutions are available to Premium Service Members only.

Start your 7 day free trial and see for yourself why Experts Exchange is the easiest and most proven technology resource in the world. Get Started

Already a member? Login to view this solution.

 
10.29.2007 at 11:39PM PDT, ID: 20175077

Rank: Wizard

All comments and solutions are available to Premium Service Members only.

Start your 7 day free trial and see for yourself why Experts Exchange is the easiest and most proven technology resource in the world. Get Started

Already a member? Login to view this solution.

 
10.30.2007 at 08:55AM PDT, ID: 20178374

Rank: Master

All comments and solutions are available to Premium Service Members only.

Start your 7 day free trial and see for yourself why Experts Exchange is the easiest and most proven technology resource in the world. Get Started

Already a member? Login to view this solution.

 
10.30.2007 at 04:01PM PDT, ID: 20181831

All comments and solutions are available to Premium Service Members only.

Start your 7 day free trial and see for yourself why Experts Exchange is the easiest and most proven technology resource in the world. Get Started

Already a member? Login to view this solution.

 
10.30.2007 at 05:41PM PDT, ID: 20182214

All comments and solutions are available to Premium Service Members only.

Start your 7 day free trial and see for yourself why Experts Exchange is the easiest and most proven technology resource in the world. Get Started

Already a member? Login to view this solution.

 
11.06.2007 at 10:41AM PST, ID: 20226329

Rank: Master

All comments and solutions are available to Premium Service Members only.

Start your 7 day free trial and see for yourself why Experts Exchange is the easiest and most proven technology resource in the world. Get Started

Already a member? Login to view this solution.

 
11.07.2007 at 02:00AM PST, ID: 20230789

All comments and solutions are available to Premium Service Members only.

Start your 7 day free trial and see for yourself why Experts Exchange is the easiest and most proven technology resource in the world. Get Started

Already a member? Login to view this solution.

 
 
Loading Advertisement...
Microsoft
  • Internet Protocols
  • Applications
  • Development
  • OS
  • Hardware
  • Windows Security
Apple
  • Operating Systems
  • Hardware
  • Programming
  • Networking
  • Software
Internet
  • Search Engines
  • File Sharing
  • WebTrends / Stats
  • Spy / Ad Blockers
  • Web Browsers
  • New Net Users
  • Web Development
  • Chat / IM
  • Anti Spam
  • Web Servers
  • Anti-Virus
  • Email Clients
Gamers
  • Tips
  • Online / MMORPG
  • Puzzle
  • Emulators
  • Action / Adventure
  • Role Playing
  • Consoles
  • Game Programming
  • Strategy
  • Sports
  • Misc
  • Computer Games
Digital Living
  • Hardware
  • New Net Users
  • New Users
  • Software
  • Digital Music
  • Gaming World
  • Home Security
  • Apple
  • Networking Hardware
Virus & Spyware
  • Vulnerabilities
  • IDS
  • Encryption
  • Anti-Virus
  • Operating Systems Security
  • Software Firewalls
  • WebApplications
  • Cell Phones
  • Operating Systems
  • Internet
  • Hardware Firewalls
Hardware
  • Handhelds / PDAs
  • Displays / Monitors
  • Components
  • Networking Hardware
  • Peripherals
  • Laptops/Notebooks
  • Storage
  • Servers
  • Desktops
  • New Users
  • Misc
  • Apple
Software
  • System Utilities
  • Industry Specific
  • Network Management
  • Photos / Graphics
  • Page Layout
  • VMWare
  • Misc
  • Web Development
  • OS
  • CYGWIN
  • Voice Recognition
  • Message Queue
  • Quality Assurance
  • Security
  • Firewalls
  • MultiMedia Applications
  • Development
  • Database
  • Office / Productivity
  • Business Management
  • OS/2 Apps
  • Server Software
  • Internet / Email
ITPro
  • OS
  • Storage
  • Encryption
  • Operating Systems Security
  • Apple Hardware
  • Laptops & Notebooks
  • Servers
  • Networking Hardware
  • Peripherals
  • Devices
  • Displays / Monitors
  • WebTrends / Stats
  • Search Engines
  • Firewalls
  • WebApplications
  • IDS
  • Vulnerabilities
  • Email Clients
  • File Sharing
  • Spy / Ad Blockers
  • Web Browsers
  • Web Servers
  • Networking
  • Anti-Virus
  • Chat / IM
  • Anti Spam
Developer
  • Web Servers
  • Web Browsers
  • Game Programming
  • Dev Tools
  • Industry Specific
  • Office / Productivity
  • Database
  • CYGWIN
  • Web Development
  • Search Engines
  • File Sharing
  • WebTrends / Stats
  • Programming
  • Content Management
  • Application Servers
  • Protocols
Storage
  • Removable Backup Media
  • Storage Technology
  • Servers
  • Grid
  • Remote Access
  • Backup / Restore
  • Misc
  • Hard Drives
OS
  • Miscellaneous
  • Security
  • Development
  • Linux
  • VMWare
  • MainFrame OS
  • Unix
  • Apple
  • OS / 2
  • AS / 400
  • BeOS
  • Microsoft
  • VMS / OpenVMS
Database
  • Oracle
  • Miscellaneous
  • MySQL
  • Software
  • Sybase
  • Contact Management
  • PostgreSQL
  • Data Manipulation
  • Clarion
  • InterSystems Cache
  • Siebel
  • MUMPS
  • OLAP
  • SQLBase
  • SAS
  • GIS & GPS
  • 4GL
  • Berkeley DB
  • DB2
  • Informix
  • Interbase / Firebird
  • FoxPro
  • Reporting
  • LDAP
  • Filemaker Pro
  • MS SQL Server
  • dBase
  • MS Access
Security
  • Misc
  • Web Browsers
  • Software Firewalls
  • Operating Systems Security
  • File Sharing
  • Spy / Ad Blockers
  • Vulnerabilities
  • WebApplications
  • IDS
  • Anti-Virus
  • Encryption
  • Anti Spam
  • Email Clients
  • VPN
  • Chat / IM
Programming
  • Editors IDEs
  • Installation
  • Handhelds / PDAs
  • Multimedia Programming
  • System / Kernel
  • Algorithms
  • Game
  • Signal Processing
  • Project Management
  • Open Source
  • Database
  • Misc
  • Languages
  • Processor Platforms
  • Theory
Web Development
  • Scripting
  • Blogs
  • Web Servers
  • Software
  • Search Engines
  • Web Graphics
  • Images
  • Internet Marketing
  • Images and Photos
  • Components
  • Document Imaging
  • Web Languages/Standards
  • Illustration
  • WebApplications
  • Fonts
  • WebTrends / Stats
  • Authoring
  • Digital Camera Software
  • Miscellaneous
Networking
  • Protocols
  • Apple Networking
  • Network Management
  • Message Queue
  • Application Servers
  • Content Management
  • File Servers
  • Email Servers
  • Misc
  • Java Editors & IDEs
  • Wireless
  • Networking Hardware
  • Backup / Restore
  • System Utilities
  • ISPs & Hosting
  • Web Servers
  • Storage Technology
  • Removable Backup Media
  • Servers
  • Broadband
  • Grid
  • OS / 2
  • Novell Netware
  • Unix Networking
  • Windows Networking
  • Security
  • Telecommunications
  • Operating Systems
  • Linux Networking
Other
  • Community Advisor
  • Lounge
  • Community Support
  • New Net Users
  • Philosophy / Religion
  • Math / Science
  • Miscellaneous
  • URLs
  • Expert Lounge
  • Politics
  • Puzzles / Riddles
Community Support
  • Suggestions
  • New to EE
  • New Topics
  • Community Advisor
  • CleanUp
  • Announcements
  • General
  • Feedback
  • Input
  • EE Bugs
 
10.29.2007 at 11:29PM PDT, ID: 20175058
I just tried named colours and got the same error message
 
10.29.2007 at 11:33PM PDT, ID: 20175067
hmmmmm don't tell me I have to cast it to the internal VB colour class.
 
10.29.2007 at 11:37PM PDT, ID: 20175072

Rank: Wizard

try like

Style ="Backcolor:<%# Eval("WebColour)%>'
Assisted Solution
 
10.29.2007 at 11:38PM PDT, ID: 20175075

Rank: Guru

Not sure if this is going to solve your problem, but Isn't there a closing quote missing?

It should be:
Backcolor='<%# Eval("WebColour") %>'
 
10.29.2007 at 11:39PM PDT, ID: 20175077

Rank: Wizard

Try to change cast it to  it to

system.Drawing.Color   object
Assisted Solution
 
10.30.2007 at 08:55AM PDT, ID: 20178374

Rank: Master

Can u place your .aspx code over here so that can be more clarified to give you ansewer.
thanx
 
10.30.2007 at 04:01PM PDT, ID: 20181831
The code is on a different machine, so I missed a closing quote when I typed it in.

All the code has been automatically generated, and I prefer to keep it that way if possible. I'm primarily interested in what the actual data needs to be in the database to make it work.

The entire code for the cell is currently:

<td style="width: 10%">
  <asp:Label ID="Label1" runat="server" BackColor='<%# Eval("WebColour") %>'
  Style="text-align: center; font-weight: bold;"
  Text='<%# Eval("Rating") %>' Width="98%"></asp:Label>
</td>




I followed pratimas suggestion and changed it to this:

<td style="width: 10%">
  <asp:Label ID="Label1" runat="server"  
  Style="text-align: center; font-weight: bold; backcolor: <%# Eval("WebColour") %>"
  Text='<%# Eval("Rating") %>' Width="98%"></asp:Label>
</td>

But I'm getting a 'tag is not well formed' error.


Pratima, what is the syntax to case it to that data type?


.. and can anyone tell me what the # symbol is in the Eval statement?
 
10.30.2007 at 05:41PM PDT, ID: 20182214
I got it to work by putting the colour assignment in the TD tag... along the lines of pratimas suggestion

So anyway, it looks like to bind the backcolour I need to use the colour datatype. If I wanted to stilll use a constant in the db, what would the syntax be to convert a #RRGGBB colour to the required colour data type?

and can anyone tell me the significance of the # symbol in the Eval statement?

 
11.06.2007 at 10:41AM PST, ID: 20226329

Rank: Master

# doesnt have any specific significance

but <%#  %> is web form syntex for databinding expression

Data-binding expressions create bindings between any property on an ASP.NET page, including a server control property, and a data source when the DataBind method is called on the page. You can include data-binding expressions on the value side of an attribute/value pair in the opening tag of a server control or anywhere in the page.

Accepted Solution
 
11.07.2007 at 02:00AM PST, ID: 20230789
Fantastic, that makes sense now... the # is part of the opening tag rather than the eval function.

Thanks for that.

Regarding my other question (data format of a bound backcolour), it sounds like I would need to cast it to a .Net datatype anyway, which basically is too complex to bother with.

Its strange that the editor lets you bind it, but apparently its not valid... you need to add code to get it to work.


Thanks for your help.
 
 
20080236-EE-VQP-29 / EE_QW_2_20070628