Web Forms :: System.ConfigurationManager.AppSettings - Get Data From?
Mar 1, 2010
I am maintaining some Asp.net code and need some help figuring something out. Basically I have a C# statememt that reads as follows
String Em = System.ConfigurationManager.AppSettings.Get("EmailAddress")
So something tells me it is trying to read an email address. I looked in the web.config file and I don't see the string "EmailAdress" defined in the <appsettings> tags or anywhere else. Could I be looking in the wrong web.config file? Or where is system.ConfigurationManager.AppSettngs looking for the definition of the email address?
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Aug 25, 2010
I've set an AppSetting key for my root directory in my web.config file and now I'm going back through my site and changing all link and resources to use this key. Then If the domain ever changes I can just change one line of code and not worry about links breaking. I'm not quite sure however how to use this when I register my header and footer user controls.
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Oct 7, 2010
I came across a strange behavior with this property. I had a winform with 2 buttons "button1" and "close". In the button1_clicked event I had the following code. I did not put any code in the for loop
int len=ConfigurationManager.AppSettings.Count;
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Oct 27, 2010
I am using MS Test to test one of my controller's actions. This method uses the ConfigurationManger to read appSettigns from the web.config. For some reason ConfigurationMangager is not able to find the appsettings.In NUNIT I would just make sure to add a copy of the webconfig file to the test project so that it is available when running in that context. However this is not working for me.
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Nov 25, 2010
i did not realize that: i have a web.config in a separate class library and i was reading the web.config appsetting from different web applicaiton.
i am using VS2010 target framework 3.5
i dont know what is wrong here but i am getting null when i try to get
ConfigurationManager.AppSettings["StoreId"];
string _storeid = GetStoreId;
public static string GetStoreId
{
get
{
return ConfigurationManager.AppSettings["StoreId"];
}
}
<appSettings>
<add key="StoreId" value="123" />
</appSettings>
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Feb 11, 2011
I am retrieving value from webconfig file.
PriceCode = ConfigurationManager.AppSettings[d.PriceCode].ToString() == "" ? "XXXX" : ConfigurationManager.AppSettings[d.PriceCode].ToString(),
if the value is found its fine, but if the value is not found in webconfig file an exception is thrown... why is that?
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Jan 5, 2011
I am facing an amazing problem in ASP.NET. I have a website with many sub directories. The sub directories have aspx and aspx.cs files but do not contain web.config files. I am using the web.config file of the parent directory for storing config items for the respective code files in sub directories. But when i m trying to read the web.config using ConfigurationManager.AppSettings[] with absolutely the correct keys, there's no value being returned. Most amazing fact is, this same code works fine in dev enviroment but not in staging.
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Jan 22, 2010
Can anyone tell me the differnce between
System.web.httpcontext.current.application["tag"]
or
System.Configuration.Appsettings["tag"]
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Mar 17, 2011
I am having this strange case, at first time when the page loades, everything goes fine. But as soon as I click on any link which makes any ajax request, after that, I get this error while trying to read the configuration."System.Configuration.ConfigurationManager.ConnectionStrings' threw an exception of type 'System.Web.HttpException"I am using asp.net mvc 1.0
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Jun 12, 2010
i have stored settings in the AppSettings section of the web.config file.
I'm trying to access these settings via System.Configuration.ConfigurationSettings.AppSettings, but the AppSettingsCollection is empty. So I can't access this settings.
The strange thing is that this is working on my development machine, but is failing on the production machine. Previous versions of the web application have also worked on the production machine. I'm not aware of any modifications that could couse this.
I have also tried using ConfigurationManager and WebConfigurationManager without success.
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Feb 28, 2010
I've got some question about two ways to save settings in the web.config.
Appsettings:
Look in web.config
<appSettings>
<add key="key1" value="value1"/>
<add key="key2" value="value2"/>
</appSettings>
Usage in code-behind:
ConfigurationManager.AppSettings["key1"];
ApplicationSettings/ Properties (autogenerated by using the 'properties'-tab in the project)
Look in web.config
<applicationSettings>
<Projectname.Properties.Settings>
<setting name="Testenvironment" serializeAs="String">
<value>True</value>
</setting>
</Projectname.Properties.Settings>
</applicationSettings>
Usage:
Properties.Settings.Default.Testenvironment
So, what the difference between these two storage possibilities of settings in the web.config? As far as I can see, a downside of the appSettings is that you have modify the web.config yourself and the appSettings are not strong tiped, where as the applicationSettings are. Both are replaceable with in a web deployment project.As far as I am concerned, there is no use for appSettings. Am I missing something here? Which is the historically seen older one?
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Feb 25, 2011
I know we can use appsettings on the aspx side with "<%$appSettings:testkey %>"
however is there a way to use appsetting in the following code example?
'<%# Eval("member_value", "http://www.test.com/members/memberpage.aspx?member={0}") %>'
What I want to do is store the URL in an appsetting, but Im not sure this is possible because of the databinding.
Also a second question, is it possible to concatenate appsettings on the aspx side such as the following code (which does not work)?
"<%$appSettings:testkey + $appSettings:testkey2 %>"
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Apr 11, 2010
When I run this piece of code I get this error message:
[Code]....
Error 1 The name 'ConfigurationManager' does not exist in the current context C:UsersPaul HudsonDesktopTT-ASP_Net_My_ProjectsConfiurationDemoDefault.aspx.cs 13 32 C:...ConfiurationDemo
I've tried adding reference for ConfigurationManager but it still does not work, what do I do?
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Mar 7, 2011
I've got some custom values in the AppSettings, in my web.config file.
These values get checked upon every Request.
eg.
So if every request checks the web.config file for the value of this key, would be be smart to put this into the Application cache (eg. via the global.asax) instead of checking this value EVERY request?
I'm assuming that when we read a value from the AppSettings, the website does a physical read of the web.config file? or is this information also all read into Memory when the website starts up and all references to any appSettings information is just an inmemory read .. not a disk I/O read?
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May 7, 2015
i need add one key value in web.config and that values read in asp.net page and to bind that value to gridview?
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Jun 5, 2010
I am not able to use
String connectionString = ConfigurationManager.ConnectionStrings["DevBackup"].ConnectionString;
I am getting error 'The name 'ConfigurationManager' does not exist in the current context' I have used namespaces
using System.Data.SqlClient;
using System.Data.Sql;
what should be done..?
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Aug 4, 2010
The other day I came across an alternative way of accessing web.config configuration in some article. It allowed to:provide path to web.config file modify web.config configuration at runtime like:config.MySetting = "new value";load web.config from another web application in the same IIS (I'm not sure about it)work with configuration using class instance instead of static ConfigurationManager class
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Jul 23, 2010
This is a bizarre behaviour I've just noticed, but very dangerous.I have the following line of code:
using (SqlConnection connection = new SqlConnection(ConfigurationManager.ConnectionStrings["SmartFormsDB"].ConnectionString))
When I run in my dev environment works fine, but when I compile and push my code to the test machine that contains a web.config with a Test DB setting, the test website
still uses my dev connection string. It's behaving as if the connection string was compiled into the binary!
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What I have write connection always in web.Config file and Why I can not write the connection in Application Variable ....
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