Chapter 15 "Using the Cache API" Server Error Message

Imar · August 10th, 2012, 03:33 PM

Can you show the code for the BasePage? Something is wrong there, but it's a tad hard to say what without seeing the code... ;-)

Imar

Caden11998 · August 10th, 2012, 03:57 PM

and also i get another error when i enterd in this code

<profile>
<properties>
<add name="FirstName"/>
<add name="LastName"/>
<add name="DateOfBirth" type="System.DateTime"/>
<add name="Bio"/>
<add name="FavoriteGenres" type="System.Collections.Generic.List'1[System.Int32]"/>
</properties>
This code seen below seems to be the problem, because when i take it out its fine.

<add name="FavoriteGenres" type="System.Collections.Generic.List'1[System.Int32]"/>

SORRY SORRY SORRY!

anyway here is the error.

Compilation Error

Description: An error occurred during the compilation of a resource required to service this request. Please review the following specific error details and modify your source code appropriately.

Compiler Error Message: BC32042: Too few type arguments to 'System.Collections.Generic.List(Of T)'.

Source Error:

Line 38: End Property
Line 39:
Line 40: Public Overridable Property FavoriteGenres() As System.Collections.Generic.List'1
Line 41: Get
Line 42: Return CType(Me.GetPropertyValue("FavoriteGenres"),System .Collections.Generic.List'1)

Source File: C:\Users\Video Editor 1\AppData\Local\Temp\Temporary ASP.NET Files\root\d148c986\74f07afa\App_Code.y6zo1r6r.5.v b Line: 40

Show Detailed Compiler Output:

Show Complete Compilation Source:

Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.272

Imar · August 10th, 2012, 04:27 PM

Take another look at the section that explains how to add the Generic.List`1 to the web.config. It's not

Code:

 
Generic.List'1

but

Code:

 
Generic.List`1

with a backtick (usually found next to the 1 key on the keyboard).

Cheers,

Imar

Caden11998 · August 10th, 2012, 04:42 PM

Here you go.

Imports Microsoft.VisualBasic

Public Class BasePage
Inherits System.Web.UI.Page

Private Sub Page_PreRender(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.PreInit
Dim PreferredTheme As HttpCookie = Request.Cookies.Get("PreferredTheme")
If PreferredTheme IsNot Nothing Then
Page.Theme = PreferredTheme.Value

End If
If Me.Title = "Untitled Page" Or String.IsNullOrEmpty(Me.Title) Then
Throw New Exception(
"Page title cannot be ""Untitled Page"" or an empty string.")
End If
End Sub

End Class

Thanks for that last post! i did not evan know what a backtick was!

Imar · August 10th, 2012, 04:56 PM

You may want to take a look at both exercises as you're now mixing up things. Checking the title should go in PreRender, setting the theme should go in PreInit.

That doesn't explain this error so this may not be the actual code you're using? Try comparing your code with the version that comes with the book.

Cheers,
Imar

Caden11998 · August 15th, 2012, 06:04 PM

I got all the errors fixed and finished the book for the second time! Thanks for all your help!

I did have a couple of questions that I hoped you could answer though. Question 1: do you have any html 5 boiler plate type suggestions? is there a specific html 5 tag I should worry about that maybe aspnet 4 doesnt cover for mobile and cross browser compatibility or otherwise? Question 2: Is there a way in aspnet 4 to re-size a users uploaded picture? For example, say a user submits a photo on my site that's 3000px by 3000px wide. Is there a way to shrink it so it doesn't slow my site down? really appreciate your help!

Thanks,
Caden

Imar · August 17th, 2012, 02:10 PM

Hi there,

Re 1: all browsers implement different parts of the HTML5 standard. Testing is really the only way to find out what works and what doesn't. Most modern browsers support the new tags introduced in HTML 5 and you can use a script library called Modernizr for support in older browsers.

Re 2:My book ASP.NET 2.0 Instant Results shows you how to resize images. You could get a copy of the book, or just download its source from the website. Also, Google has lots of examples on resizing images in .NET.

Cheers,

Imar