May 1, 2017
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vb ile config dosyası okuma
vb ile config dosyası okuma
Merhaba Çalıştığımız projelerde veya yazdığımız kodlarda çoğu zaman bir config dosyasına ihtiyaç duyarız. Bu gibi durumlarda config içerisine yazdığımız verileri okumakda önemli oluyor. Bunun için çok basit olarak config doyasından veri okumayı hazırlayalım. İlk olarak projemizi oluşturalım ve projemizse referans olarak System.Configurationdll ini ekleyelim. Daha sonra okuma işlemini…
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c# ile config dosyası okuma
c# ile config dosyası okuma
Merhaba Çalıştığımız projelerde veya yazdığımız kodlarda çoğu zaman bir config dosyasına ihtiyaç duyarız. Bu gibi durumlarda config içerisine yazdığımız verileri okumakda önemli oluyor. Bunun için çok basit olarak config doyasından veri okumayı hazırlayalım. İlk olarak projemizi oluşturalım ve projemizse referans olarak System.Configurationdll ini ekleyelim. Daha sonra okuma işlemini…
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当前配置系统不支持用户范围的设置。
在类库项目中使用app.config，并使用Properties.Settings.Default.Token;读取时候报出错误：当前配置系统不支持用户范围的设置。
C#中读取配置文件，IsNullOrWhiteSpace和IsNullOrEmpty
string.IsNullOrEmpty和string.IsNullOrWhiteSpace方法， IsNullOrEmpty是判断字符串是否为：null或者string.Empty。如果是如"\t"这样的字符就返回false了，为了达到判断过滤这些功能，就要使用Trim()和Length属性帮忙，判断是否长度为零。 IsNullOrWhiteSpace 是判断所有空白字符，功能相当于string.IsNullOrEmpty和str.Trim().Length总和，他将字符串给Char.IsWhiteSpace为ture的任何字符都将是正确的。 根据MSDN的说明，这个方法会比调用上述两个方法的性能更高而且简洁，所以在判断这个功能时，推荐使用。
给类库项目添加配置文件，右键项目-属性-设置-添加设置文件，配置名称和值以及类型和范围。在项目中会自动出现app.config文件和Settings.cs文件
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Change connection string from C#
Ever want to change the connection string of the database from C# code in your application than your are at right place. The below code snippet in C# exactly does that. Changing the connection string in your web.config or app.config file programmatically or with C# code. Code Snippet * private void UpdateConnectionString(string ConfigPath) * { * XmlDocument xmlDocument = new XmlDocument(); * xmlDocument.Load(ConfigPath); * XmlNode parentNode = xmlDocument.DocumentElement; * if (parentNode.Name == "connectionStrings") * { * foreach (XmlNode childNode in parentNode.ChildNodes) * { * if (childNode.Name == "add" && childNode.Attributes["name"].Value=="MySqlConnection") * { * string sqlConnectionString = childNode.Attributes["connectionString"].Value; * SqlConnectionStringBuilder sqlBuilder = new SqlConnectionStringBuilder(sqlConnectionString); * sqlBuilder.InitialCatalog = "yourDatabaseName"; * sqlBuilder.IntegratedSecurity = true; * sqlBuilder.Password = ""; * * //Change any other attributes using the sqlBuilder object * childNode.Attributes["connectionString"].Value = sqlBuilder.ConnectionString; * } * } * } * xmlDocument.Save(ConfigPath); * } http://dlvr.it/4p7hR7
Change connection string from C#
Ever want to change the connection string of the database from C# code in your application than your are at right place. The below code snippet in C# exactly does that. Changing the connection string in your web.config or app.config file programmatically or with C# code. Code Snippet * private void UpdateConnectionString(string ConfigPath) * { * XmlDocument xmlDocument = new XmlDocument(); * xmlDocument.Load(ConfigPath); * XmlNode parentNode = xmlDocument.DocumentElement; * if (parentNode.Name == "connectionStrings") * { * foreach (XmlNode childNode in parentNode.ChildNodes) * { * if (childNode.Name == "add" && childNode.Attributes["name"].Value=="MySqlConnection") * { * string sqlConnectionString = childNode.Attributes["connectionString"].Value; * SqlConnectionStringBuilder sqlBuilder = new SqlConnectionStringBuilder(sqlConnectionString); * sqlBuilder.InitialCatalog = "yourDatabaseName"; * sqlBuilder.IntegratedSecurity = true; * sqlBuilder.Password = ""; * * //Change any other attributes using the sqlBuilder object * childNode.Attributes["connectionString"].Value = sqlBuilder.ConnectionString; * } * } * } * xmlDocument.Save(ConfigPath); * } http://dlvr.it/4f0Bkl
Read value from app.config
Here is a simple explenation of how to read a value from app.config file:
This is value that i add in app.config:
<appSettings> <add key="Logging" value="C:\Develop\DOTNET4.0\" /> </appSettings>
For getting value just apply following line of code:
sting keyValue = ConfigurationManager.AppSettings["Logging"];