Web Forms :: Web Controls In Code Behind File Not Recognized?
Aug 3, 2010
I downloaded iTracker to get started doing some web development with ASP.NET. I don't understand why in the code behind file, the standard web controls are not recognized.
For example:
This is the ASPX File ...............
<%@ Page Language="vb" AutoEventWireup="false" MasterPageFile="~/ITracker.Master" CodeBehind="Details.aspx.vb" Inherits="dfs.ITracker.Details"
title="Untitled Page" %>
<asp:Content ID="Content2" ContentPlaceHolderID="cphTitle" runat="server">
<asp:label ID="lblPageHeader" runat="server" CssClass="PageHeader"></asp:label>...
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Oct 14, 2010
I am in the process of adding my custom aspx pages to the LAYOUTS folder(a folder I created) in a WSPbuilder solution in VS08. The problem I am having is when I build the solution it fails because the controls(Load, Textboxes, dropdown lists,etc) in the code behind file for the custom aspx pages say they are not defined. They all have a blue squiggly line and I get over 100 errors.what to do to get the WSP to recognize the code behind pages.
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Jan 18, 2011
I recently added a repeater control to a page
<asp:Repeater runat="server" Visible="true" ID="repeaterApp" > </asp:Repeater>
When I go to the page_load event in the codebehind, I can't seem to find this control at all. No intellisense whatesover. I've tried renaming, closing the solution, even changing the codebehind directive at the top of my aspx page to "codefile".
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Jul 19, 2010
I noticed that some aspx controls were not being recognized by intellisense, and when I tried to compile, I got errors stating that the controls basically didn't exist.
After a lot of tinkering, I realized that the .aspx.designer.cs file was missing for several .aspx files.
What is the best way to re-create the files?
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Mar 12, 2010
I just wrote this into my WebForms .aspx:
<span id="GenerateChartButton" runat="server"></span>
I went to the code-behind, and typed this:
this.GenerateChartButton
and it's not recognising that I added the span to the page. Is there something I need to do to make this happen? I have been working in MVC lately, so I haven't had to worry about the relationship between the page & code-behind in a while, but I can't remember any tricks that I had to perform to reference a HTML element in my code.
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Dec 17, 2010
I have a nested repeater set up but the child repeater control is not being recognised in the code behind. It's not even being added to the designer file. I've tried this on an aspx and an ascx page but both gives the same problem.
<asp:Repeater ID="RepeaterParent" runat="server">
<ItemTemplate>
<asp:Repeater ID="RepeaterChild" runat="server">
</asp:Repeater>
</ItemTemplate>
</asp:Repeater>
with this on the page the code behind only recognises the RepeaterParent but not RepeaterChild.
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Apr 8, 2010
I read a xml file (myConfig.config) and provide it as an input to a CLR method. When I make changes to this xml file, it doesn't seem to be recognizing it. When this line throws an error, I always see the first version of the file as a part of the error message.In the config file properties, I have set Copy to Output Directory as Copy always, but it still doesn't seem to work.
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Jul 21, 2012
I have a .net aspx project done with VS 2008 using the .Net 2.xxxx framework. This ASPX application is deployed on and 4 different 2003 Server boxes. 3 are running in total beautifully. In the 4th box is my issue. I do a FILE.EXISTS conditional test looking for case file pdf's. These case numbers are structured as such 2012-C-0421,001,0008.PDF
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Mar 2, 2011
I have created a webservice, which debugs fine with no errors, and published this on my localhost server for testing.
I have created a windows app which calls the webservice but am hitting problems as soon as I reach the point where the webservice tries to connect to its database.
The connectionstring is held within the web.config file of the webservice as
>><connectionStrings>
<add name="MyConnectionName" providerName="System.Data.ProviderName" connectionString="server=MyServerName; database=MyDataBaseName;uid=MyUser;pwd=MyPassword;"/>
</connectionStrings>
and called within the code by using the statement
>> System.Configuration.ConfigurationManager.ConnectionStrings["MyConnectionName"].ConnectionString
, and as I said before, this works perfectly when debugging the webservice application directly.
However, the windows application is not seeing the connection properly, if I use the statement as above I get a debug error stating that it is a NULL reference. If I change it to
>> System.Configuration.ConfigurationManager.ConnectionStrings[0].ConnectionString
I no longer get a debug error, but the connection is not made. On testing the above code it believes the name for connection 0 is "localSqlServer" and in both the web app and the webservice the error below is returned.
>>An attempt to attach an auto-named database for file \MyServerMyDirectoryMyProjectMyProjectApp_Dataaspnetdb.mdf failed. A database with the same name exists, or specified file cannot be opened, or it is located on UNC share.
why the windows application see's the correct connection string code as null? Is there additional security I need to add for the web.config file to be accessible? Or does the connection strings need to be relicated within the app.config of the windows app?
Both applications are written in C# and I use Visual Studio 2010, ASP.Net version 4.0.30319
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Jan 14, 2011
I created a new page in an existing project. The existing pages are still good, but the new page is having problems at runtime. The problem is that controls are not recognized and throw a "object reference not found" error. I even tried Page.FindControl and that didn't work either. This is only happening with this page. The controls are recognized at design time, and are not recognized only at runtime.
The controls were copied from a regular Web form into a content form with a master page. They worked fine when in the regular web form. Could that be the issue?
I tried creating a new page and moving the controls over, but that didn't fix the problem. I also tried deleting the designer file and recreating it (using convert to web application) but that didn't resolve it either. I'm out of ideas here. Here is the page directive and the first control that is not recognized.
<%@ Page Language="C#" MasterPageFile="~/Site.Master" AutoEventWireup="true" CodeBehind="default_grid.aspx.cs" Inherits="TestItemDevelopment.default_grid" %>
<asp:Content ID="Content4" ContentPlaceHolderID="mainContentHolder" runat="server">
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Nov 19, 2010
I need to access controls of aspx page and usercontrol page through the external .js file. I created a global varaible in the aspx page
<script language="javascript" type="text/javascript">
var loadPanelID = "<%=ajaxLoadingPanel.ClientID%>";
</script>
Now I pass this value in the onclick event of button click (Let the funtion name be Fun(loadPanelID) ) . The controls is recognised in the .js file. Everything is fine till now. Now i need to call the same javascript method Fun() from the button click of usercontrol.
<script language="javascript" type="text/javascript">
var loadPanelID = "<%=ajaxLoadingPanel1.ClientID%>";
</script>
I have ajaxLoadingPanel1 in the usercontrol and I have defined global variable as in the first one in ascx and passed that value to Fun() method. But this time it gives error called "loadpanelID" is undefined.
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May 27, 2010
I am extracting some value from my database table. there is a files haiving datatype dattime. in some recordsthis column has null value, by default.
see my code
lblDonorname.Text = dt.Rows[0]["SubContarctor_Name"].ToString();
string dtrequest = dt.Rows[0]["Request_Date"].ToString();
if (dtrequest.ToString()!="")
{
DateTime dtrequest1 = Convert.ToDateTime(dt.Rows[0]["Request_Date"].ToString());
lblRequestDate.Text = dtrequest1.ToString("dd/MM/yyyy");
}
lblSubConAmount.Text = dt.Rows[0]["Sub_ContractAmt"].ToString();
bolded part for extracting date in a label( lblRequestDate). is it ok by point of view security (I never get an error although the data may be complex)
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Jul 19, 2010
This is odd. I have a simple detailsView on an aspx page, which I dragged and dropped. I think edited each basic text box in the grid to either be a date picker, or a drop down list. This is working. I can see my data fine with no errors. This is an "edit" page, so when the user clicks "Save", I do a simple "update" statement. However, when I'm writing the code for the save button, the intellisense isn't picking up any of my control names?? Here's an example of my code:
[Code]....
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Apr 16, 2010
Can the select command of a SqlDataSource be given by code in the code behind file. Also by calling the SqlDataSource.Select can the select statement be executed?
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Jun 30, 2010
I am developing web application using csharp on visual studio 2008. I am loading the data from Microsoft Excel to datagrid. But when I want to check the date in a given column and getting the error
String was not recognized as a valid DateTime . How can I solve this problem? The code I am using is below.
[Code]....
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Jun 12, 2010
I just installed the release version of Visual Studio 2010, and it looks like there's something wrong with the standard ASP.NET server controls. When I create a basic server control, such as a TextBox, the editor underlines it in green and says (I also get no intellisense for ASP.NET controls): Element 'TextBox' is not a known element. This can occur if there is a compilation error in the Web site, or the Web.config file is missing. The web site builds fine, and the Web.config file is not missing:
<?xml version="1.0"?>
<configuration>
<system.web>
<compilation debug="false" targetFramework="4.0" />
</system.web>
</configuration>
The controls work just fine in the code-behind, and they function correctly when I run the site. Is there some configuration problem here?
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Feb 16, 2011
How to I reference say a text box from my code back file? I am having issues with trying to execute an sql query from the click of a button and then place the result into that text box...
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Nov 6, 2010
I have created an imageurl and label ids inside an itemtemplate which is inside a datalist but when I want to do some programming based off of those two ids, the code behind files do not recognize anything inside an item template.
Is there a way I can retrieve from an itemtemplate onto say like a string in a code behind file?
To make my explanation easier this is what I'm trying to do:
I have two div tags, one on the left and one on the right.
The div tag on the left contains a datalist of an Itemtemplate of various pictures.
When you click on one of these pictures, the same picture you clicked on will display in the right div but larger width and height.
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Feb 10, 2011
I don't know what wrong with my code. I always get empty value by using following statement(in GridView_SelectedIndexChanging event)
string IDTextValue=GridView1.Row[SelectedIndex].Cells[1].Text;// <-- My Column (which hold the key value) index is 1
How can I get correct value in code behind file? I used sqldataSource and GridView. I need handle some business logic in code behind file.
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Jun 24, 2010
I'm creating a Linq to SQL dynamic data web-site. I have created a new project, added a Linq to SQL classes object to my App_Code folder, and dragged the relevant tables from my Server Explorer window onto the dbml designer. I've saved and built my solution. So, I have this in the dbml code file:
[Code]....
I get the following error: The type or namespace name 'DealerClassesDataContext' could not be found.
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May 27, 2010
I am extracting some value from my database table. there is a files haiving datatype dattime. in some recordsthis column has null value, by default.
see my code
lblDonorname.Text = dt.Rows[0]["SubContarctor_Name"].ToString();
string dtrequest = dt.Rows[0]["Request_Date"].ToString();
if (dtrequest.ToString()!="")
{
DateTime dtrequest1 = Convert.ToDateTime(dt.Rows[0]["Request_Date"].ToString());
lblRequestDate.Text = dtrequest1.ToString("dd/MM/yyyy");
}
lblSubConAmount.Text = dt.Rows[0]["Sub_ContractAmt"].ToString();
bolded part for extracting date in a label( lblRequestDate). but for some records it is not working and for some it is working. I want to make it like if any record doesnt have any value then it should shows in label
lblRequestDate blank
how to do that, even I am not understanding if it work for some records then it should work for all records where as all records having NULL value.
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Mar 14, 2011
I am working solo on an Asp.net/C# project created by someone in the past. I created two new web forms, and then built the prjocect and did the deploy using a TFS team build project. For some strange reason, my Aspx file is not getting copied to the destination DEV server. It does get copied to a temp folder on that server, but in the end, the team build is failing and not copying over the new Aspx file.
So until I figure out how to fix the team build script, is their a way to just copy the Aspx file out to the desired server location? That as well as copying out a dll which is associated with the build file?
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Jul 25, 2010
I have an asp.net application. I want to add a global.asax and global.asax.cs file to my project. In the IDE when I select to create a new global.asax file, the option to create a CS code behind file is greyed out. When the global.asax file is created, no code behind is created, instead code is placed in the global.asax file and the global.asax.cs file is never created? Why is the option for a C# code behind file greyed out?
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Mar 15, 2011
I have written a piece of code which exports the gridview to an excel file. But this code created the grid on the firstrow,firstcolumn of spreadsheet.
How can i modify this code to write the grid on a given row& column?
[Code]....
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Jan 7, 2011
I am having trouble formatting the date on a textbox I get the error above if I don't enter the date in MM/DD/YY format in the textbox. I am also using this in a FormView so I can't format it or don't know how to in the code behind so if there is a way to format it in design view that would be preferable. Does anyone have any ideas on how I would do any of this.
<asp:TextBox Text='<%# Bind("BIRTH_DATE", "{0:d}") %>' Font-Names="Tahoma"
Font-Size="X-Small" ToolTip="MM/DD/YYYY" ID="txtBirthDate" runat="server"
TabIndex="2" CssClass="style5"></asp:TextBox>
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