Attempted to read or write protected memory. This is often an indication that other memory has been corrupted RSS. (note: an alternative to Print # is Write #, which adds commas between items, and also puts the ' character around strings). You can read files in a much faster way. Read/Write App. Config File with . NET 2. 0. Introduction. This is my first Code. Project article. I would like to show you the most important changes in the System. Configuration namespace with . NET 2. 0. I have looked at my blog referrer statistics and saw about 2. Google. Most of them were searching information on how to configure the new Enterprise Library but there are also a significant number of people that seem to seek answers to the following questions: How to read/write to App. Config? How to store a list of objects in a config file via the System. There are two ways to do it: 1. Using JavaScript extensions (runs from JavaScript Editor), or 2. Using a web page and ActiveX objects (Internet Explorer only). This is the snippet How To: Write, Modify, Remove, Read Application Settings From Configuration File on FreeVBCode. The FreeVBCode site provides free Visual Basic. This is the snippet Read Text From/Write Text To a File (VB.NET) on FreeVBCode. The FreeVBCode site provides free Visual Basic code, examples, snippets, and articles. Learn what.NET 2.0 offers you to read/write App.Config files; Author: Alois Kraus; Updated:; Section: C#; Chapter: Languages; Updated. Introduction: In this article I will explain how to read or write connection strings in web.config file using asp.net. Configuration mechanism? Reason enough for me to shed more light on the System. Configuration namespace. The main changes from . NET 1. 0/1. 1 in the System. Configuration namespace are: Write to your App. Config file through the Configuration class. New configuration model for Windows Forms applications Store complex objects including object collections in your App. Config File It is possible to store Connection Strings in the App. Config file. See Connection. As an alternative you can use Linqtoexcel. This does not require Excel to be installed. It is based on the default available database drivers on the machine. Settings which enables you to store your settings on an SQL Server. The Enterprise Library for Sample Sql. Configuration exercises this by implementing a Sql. Configuration. Source which can store and retrieve a Configuration. Section. So where to start? I think first I will show you the config file and explain how you can create it programmatically in your application. The easiest way to read/write App. Settings. If you want to store only key/value pairs in your App. Simply add an < appsettings> section and add your data as key/value pairs of the form < add key="xxx" value="xxxx" />. That's all to create a new app. Read And Write File In AspirationApp. Config ="1. 0"="utf- 8"< configuration> < app. Settings> < addkey="Setting. Read And Write File In Asparagus![]() Very"/> < addkey="Setting. Easy"/> < /app. Settings> < /configuration> The data access API has been changed for this type of setting with . NET 2. 0. The "old" one liner Configuration. Settings. App. Settings has been deprecated in favor of Configuration. Manager. App. Settings. ![]() Apart from the naming change you can now also write your application settings. For read only access you can look at the Show. Config function defined below. Writing the last modification time is demonstrated in the Main function. System. using System. Collections. Generic. System. Text. using System. Configuration. namespace App. Settings. class Program. Show. Config(). foreach(string key in Configuration. Manager. App. Settings). Configuration. Manager. App. Settings[key]. Console. Write. Line("Key: {0}, Value: {1}", key, value). Main(string[] args). Show. Config(). System. Configuration. Configuration config =. Configuration. Manager. Open. Exe. Configuration. Configuration. User. Level. None). config. App. Settings. Settings. Add("Modification. Date". Date. Time. Now. To. Long. Time. String() + " "). config. Save(Configuration. Save. Mode. Modified). Configuration. Manager. Refresh. Section("app. Settings"). Show. Config(). }Expected Output: Key: Settings. Value: Very. Key: Setting. Value: Easy. Key: Settings. Value: Very. Key: Setting. Value: Easy. Key: Modification Date, Value: 0. With this mechanism you can read and update simple key/value pairs within your application without digging any deeper in the System. Configuration namespace. The following examples show the other features like the new Windows forms configuration mechanism, create your own configuration section and how you can easily store lists of objects in the App. Enterprise Library helper classes. Using the My. Settings Feature. When developing Windows Forms with VS2. The Windows Forms designers were so nice to create an access class automatically from your config values and came up with a consistent model to store application global config files in the app. Please note that the Forms configuration model is not available in class library projects since you have no App. DLL. When you add a settings file to your class library project you can merge the settings with the App. This can be useful if you want to enforce that every application that uses your library can have its own settings inside the App. You have the freedom to store your settings wherever you would like to. Any provider can be plugged into your config data access class by decorating your configuration class with the Settings. Provider. Attribute. If none is specified, the Local. File. Settings. Provider is used which relies on System. Configuration. This is the reason why you do not need to reference the System. Configuration assembly in a Windows form, but you see the System. Configuration assembly loaded in your Windows forms application. You can check it with the debugger in the loaded modules list. Below is a new Windows Forms project shown which was generated via New- > Project- > Windows Application. The new configuration features are visible in the Properties folder of your project. There go your resources and the automatically generated strongly typed resource access class with static properties to allow easy and type safe access to your resources. This is similar to the old C programming model with Windows resources. You had an header file with resource ids generated by the resource compiler which spits out a header file which is compiled (compile time checking of the existence of resources) and an object file which is linked into your target. Now you have also compile time checking in . NET if you access your resources via the static properties. The configuration features surface in the auto generated Settings. Settings. Designer. To create new configuration values you have full Designer integration within Visual Studio (see picture below). In your code you can read/modify these settings via the generated access class. Inside the visual editor you can choose between two scopes for each of your configuration settings: Application and User. The Application scope defines configuration values which cannot be changed by the user and are the same for all users of this application. User scoped settings on the other hand can be changed/created by, well the users and are stored within their local profile. Application scoped settings cannot be altered when you save your settings. Only the user settings are written to disk during a save operation! VS 2. 00. 5 generated Windows Forms application skeleton. Settings. settings (Generated by Visual Studio)='1. Settings. Filexmlns="http: //schemas. Visual. Studio/2. Current. Profile="(Default)"Generated. Class. Namespace="Windows. Application. 1. Properties"Generated. Class. Name="Settings"> < Profiles/> < Settings> < Setting. Name="test. Setting"Type="System. String"Scope="User"> < Value. Profile="(Default)"> Form. Value> < /Setting> < /Settings> < /Settings. File> Settings. Designer. cs (Generated by Visual Studio using the Settings. Single. File. Generator as Custom Build Tool) namespace Windows. Application. 1. Properties. Settings . global: :System. Configuration. Application. Settings. Base. privatestatic Settings default. Instance = ((Settings). System. Configuration. Application. Settings. Base. Synchronized(. Settings()))). publicstatic Settings Default. Instance; }. [global: :System. Configuration. User. Scoped. Setting. Attribute()]. System. Configuration. Default. Setting. Value. Attribute("Form. Setting. get { return ((string)(this["test. Setting"])); }. set { this["test. Setting"] = value; }. To load your settings programmatically, you only need to do a: Settings set = Settings. Default; and access your settings via the property of the returned instance. Setting; Wow that was easy. Wasn´t it? Now let's save our changed test setting: set. Setting = "test value". Save(); That's pretty much it. To display some of your settings in your form you can use data binding and let your users configure the application font, color, .. User specific settings are stored in %APPDATA%\< App. Name> \< App. Name> < App. Config. Name_GUID> \< Assembly. Version> \user. The path to the user config on my machine is e. APPDATA%\Windows. Application. 1\Windows. Application. 1. exe_Url_x. This enables you to install a Windows Forms App as Administrator for all users with some global settings in the executable App. If your users are in a domain with a roaming profile they will get the same profile and thus the same user settings on every computer they work. Is this new mechanism compatible with the old one? Yes it is. Even more: these nice classes do rely heavily on the System. Configuration features. Each user/application section is put into its own Configuration. Section. Group. Collection which can be accessed programmatically. Every group does contain one or more configuration section/s of the type Client. Settings. Section which serves as a container for your strongly typed key/value pairs. The following code enumerates all your auto generated settings and prints them out to the Console. System. Configuration. Configuration config =. Configuration. Manager. Open. Exe. Configuration(Configuration. User. Level. None). Configuration. Section. Group. Collection section. Groups = config. Section. Groups. Show. Section. Group. Collection. Info(section. Groups). Show. Section. Group. Collection. Info(. Configuration. Section. Group. Collection section. Groups). Client. Settings. Section client. Section. Setting. Value. Element value. Configuration. Section. Group groupin section. Groups). {. if(! group. Is. Declared). continue. Console. Write. Line("Group {0}", group. Name). foreach(Configuration. Section section ingroup. Sections). client. Section = section as Client. Settings. Section. Console. Write. Line("\t. Section: {0}", section). Section == null). Setting. Element setin client. Section. Settings). Value as Setting. Value. Element. Console. Write. Line("\t\t{0}: {1}". Name,value. Value. Xml. Inner. Text). How To Read/Write Another App. Config File. To open another App. Config file, you need to create an instance of Exe. Configuration. File. Map. The purpose of this class is not that obvious but we can use it to open another file.
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