Custom Server Controls :: TypeConverter Generates Parser Error At Runtime?
Jun 20, 2010
I'm building a custom control that has a ValidationText property of type List<string>. The value of the property is rendered as a comma-delimited string in the XHTML code. Changing the value in the String Collection editor updates the XHTML code and vice versa. So everything seems to work at design time. But... when I run the project I get a parser error:
"Cannot create an object of type 'System.Collections.Generic.List`1[[System.String, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]]' from its string representation 'hh,ss' for the 'ValidationText' property."
I have an application that uploads an Excel .xls file to the file system, opens the file with an oledbconnection object using the .open() method on the object instance. The upload and writing of the file to the file system works fine but I get an error when trying to open the file on our production server only. The application works fine on two other servers (development and testing servers).
The exception comes on production server at connection.Open() some times, when I reset the asp.net worker process it started to work but after some hours/days It occurs again. how can I fix this issue which comes in production some times but very irritating, or there is some other work around.
I have deployed my website to a shared hosting provider and since deployment, it shows the error "XML Parser Error:no element found" from time to time. I have checked my error log and I find issues such as "Object reference not set to an instance of the object" but the weird thing is if I visit the SAME page after a while, it loads!
I have checked with my hosting provider and they told me the below is what they can see on their side:
Exception information: Exception type: HttpException Exception message: Could not load type 'Test2.GlobalAsax'.
I have checked my global.asax and the interits are all correct. I have tried:
a) Deleting the webapplication dlls and rebuilding - didn't work
b) Deleting the global.asax and adding a new one and then rebuild. - didn't work
c) Changing the class name of global.asax.vb and updating at inherits at global.asax, and rebuild - didn't work
d) Change the Asp.Net version to an older version and change back to original version - didn't work
e) Debugged my application countless times locally (for the same page) but while connecting to the DB on my hosting provider - no issues found
My webhosting provider is saying there is an error in my code, but if there is a bug, shouldn't it always show the same error?
I also noticed that when the XML parser error is shown, if I were to go back to say Google.com and then to my website's main page, and then to the Page with error, the page loads!!
I am seriously running out of ideas what could have caused this issue. I have also conducted a ping test to my website and I am getting some time outs, will that cause my page to not load from time to time?
I have created a custom control from scratch and it works fine as in you can build the project that uses it and it works fine at runtime. Problem is when you go to design view the control shows an error in the place of where the control should be rendered.
Error: '<SomeValue>' Could not be set to '<SomeProperty>'
This shows up on all my custom set properties. These properties are created as basic as possible. I can give the properties values in Source view and run the app just fine. I can even add a Onclick event. If I don't set any custom properties the control will render fine in Design view. It's only when I set a value to a custom property.
Property Code Example:
[Code]....
I've even removed the Category and Description tags with no difference.
I don't know if what I said makes sens, but I hope it does.
I was referred here by MSDN forums hope this is the right place - I have a custom control (:WebControl) that renders web.sitemap in a specific way. While it runs error free and produces the expected result, at Design-Time it complains
[Code]....
and have tried the SiteMapDataProvider Tag with and without the SiteMapProvider attribute.Does anybody have (a) any experience with this, or (b) any suggestions as to how to track down the problem?
How to save webpage as pdf... Am using asp.net 4.0 and oracle 10g. and code behind language as vb.net.I have one button. that converts the web page to pdf.It shows Could not find file 'C:....' in htmlparser.Parse(sr) error...
Response.ContentType = "application/pdf" Response.AddHeader("content-disposition", "attachment;filename=psno.pdf") Response.Cache.SetCacheability(HttpCacheability.NoCache) Dim sw As New StringWriter()
I've created an Expression Web form with a SQL datasource which is doing a query/select statement.Somehow it appears that I'm making a syntax error. When I divide the query in two and execute them separate, it works fine.I need to filter for an EventType, Region and Today's date + a custom interval (like 7 day's for a week)he parameters come from a search form where the user can select these values via a dropdown list.The two separate (and working) queries within my form are:Query nr.1 :
"Select * from Events WHERE (([EventType] LIKE '%' + @EventType + '%') AND ([Region] LIKE '%' + @Region + '%'))"> <asp:formparameter DefaultValue="%" FormField="EventType" />
I have created an application which runs fine in VS2010.Now i am trying to host that application using inetmgr.When i try to browse the page from inetmgr content view then i get the "Parser Error Message: Could not load file or assembly 'System.Web, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The system cannot find the file specified".If i browse the page from VS i am able to do it.I am not able to host the app. may be the reason is the above stated error.
On one server I have my ASP.NET 3.5 website running just fine. That server is the one we use for testing (IIS6 with ASP.NET 2.0.50727). I went to the live server where ASP.NET is also installed (IIS6 with ASP.NET 2.0.50727). I right-clicked on the folder I wanted my website to go in, and I set it as an application in IIS. But when I go to the website on the live server, I get the Runtime Error. Like the error told me to do, customErrors mode is "Off" in the web.config file. I even changed authentication mode to "None" (it was set to Windows on the test server). Yet I still get this error. Is there something I should change about the web.config file? Is there something I should check in IIS?
For reference, here is the full error message. Server Error in '/' Application. Runtime Error Description: An application error occurred on the server. The current custom error settings for this application prevent the details of the application error from being viewed remotely (for security reasons). It could, however, be viewed by browsers running on the local server machine. Details: To enable the details of this specific error message to be viewable on remote machines, please create a <customErrors> tag within a "web.config" configuration file located in the root directory of the current web application. This <customErrors> tag should then have its "mode" attribute set to "Off".
I'm trying to create a web server control with a css embedded in the assembly.
I marked it as an embedded resource, add assembly attribute to reference it and use the proper methods to include the link to that
css in html code... my page renders ok witk something like <link href='/WebResources.axd?....' />
That's when the problem appears! My control isn't using the css as it appears to not found webResources.axd
I tried directly in web browser to locate http://locahost/mysite/WebResources.axd and it came with http code 404 NOT FOUND
In my IIS i have uncheked "Verify if file exists" on my extensions mapping related to .axd I add HEAD verb in Web.Config to path WebResources.axd and the result is always the same
Type: System.Data.EntityCommandExecutionException Inner Exception: "Invalid column name 'DisplayAsSoldOut'."
I've tried searching for this type of exception but to no avail. The column appears in the EDMX dataset just fine. I even created a small throwaway program and imported the EDMX to do a simple read from the database and it worked fine. Has anyone run across something similar?
I need to add a small training page to an existing website structure. I created a new project and published it to a subdirectory of the website, but when I run it, the .aspx pages throw a parser error because it's looking for the codebehind files in root/bin instead of root/subdirectory/bin. How can I make it look in the right folder?
So I finally managed to create a control which basically shows a bunch of Panels with an extra property. I use it like this:
[Code]....
This renders fine and shows the text in the TabPanel controls. However, when I replace the plain text with something a little more exciting, say an UpdatePanel so it looks like this:
[Code]....
Then I get this weird error:
Page cannot be null. ensure that this operation is being performed in the context of an ASP.NET request.[InvalidOperationException: Page cannot be null. ensure that this operation is being performed in the context of an ASP.NET request.] System.Web.UI.UpdatePanel.get_IPage() +647672 System.Web.UI.UpdatePanel.Render(HtmlTextWriter writer) +20 SP.adminonly_reports_loginreport_aspx.__RenderTabPanel1(HtmlTextWriter __w, Control parameterContainer) in D:....eport.aspx:37 System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +115 System.Web.UI.WebControls.WebControl.RenderContents(HtmlTextWriter writer) +13 System.Web.UI.WebControls.WebControl.Render(HtmlTextWriter writer) +42 TabPanels.TabPanelHolder.Render(HtmlTextWriter w) in D:e4Webwwwrootlms_workingTabPanelsTabPanelsTabPanelHolder.vb:146 System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +240 System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +240 System.Web.UI.HtmlControls.HtmlForm.RenderChildren(HtmlTextWriter writer) +253 System.Web.UI.HtmlControls.HtmlForm.Render(HtmlTextWriter output) +87 System.Web.UI.HtmlControls.HtmlForm.RenderControl(HtmlTextWriter writer) +53 System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +240 System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +240 System.Web.UI.Page.Render(HtmlTextWriter writer) +38 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +4240
If I take out the UpdatePanel and replace it with an ASCX control I made that simply puts database data into some DropDownLists, like this...
[Code]....
Then the page loads, but the data is not loaded into CustomerUserList1, and the dropdownlists within it are all blank. CustomerUserList1 has worked fine for years when used directly in a normal Panel/Page UpdatePanel.
Every thing is fine but when I execute the project, NO control on my user control gets "instantiated" and thus I receive error "Object Reference Not Set"
Note that My Control has,
1) Public property PublicProperty as String
2) 1 Label control
In Load Event Handler I am setting Text property of Label Control to PublicProperty. Here object reference NOT set error occurs (which means Label control is NOT initialized).I don't want to register my control using Src, TagPrefix etc.
I have set up a small SQL Server database for users to login and also create accounts. There is a problem with the connection string though. Whenever I use the connection string below in the web.config file I get a server error page and cannot view the website. However when I take out this connection string I am able to view the website albeit the database doesn't work.
I've seen similar posts but have been unable to resolve my error. When browsing the site from IIS I get the following error- a .master file does not exist. I can see it in the directory and everything works fine when running out of VS 2010.
Parser Error Description:
An error occurred during the parsing of a resource required to service this request. Please review the following specific parse error details and modify your source file appropriately.
Parser Error Message: The file '/AMA.Master' does not exist.
I'm a newb to ASP.NET and I made an app in VS2010 using NET 4.0 (Working all fine in debug mode) I tried to host my app @ aspspider and I'm getting the following error:Parser ErrorDescription: An error occurred during the parsing of a resource required to service this request. Please review the following specific parse error details and modify your source file appropriately.Parser Error Message: Could not load type 'AuthStealerPanel._Default'.Source Error:
Line 1: <%@ Page Language="vb" AutoEventWireup="false" CodeBehind="Default.aspx.vb" Inherits="AuthStealerPanel._Default" %>
I also tried to rebuild the .dll and upload it to the /bin/ and application's root.
I have built an application in ASP.NET 3.5 framework and it is working fine on localhost but when i am uploading it on my server the page gives an error on loading "Parser Error Message: Could not load type 'Default'." <%@ Page Language="C#" AutoEventWireup="true" Debug="true" CodeFile="Default.aspx.cs" Inherits="Default" %>
I have a control that renders different children according to a property value. All works great until I add a rating control in the mix. I get the following:
Page cannot be null. ensure that this operation is being performed in the context of an ASP.NET request.
