[英]Is it possible (and how) to add ConnectionString to app.config at runtime in C#?
我有一个控制台应用程序,它将connectionstring作为参数。 我必须在app.config中设置一个名为'ConnectionString'的ConnectionString,并将给定的参数设置为sql connectionstring。
谢谢答案。 借助我的链接,我得到了这个:
var config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None); var connectionStringSettings = new ConnectionStringSettings(“ConnectionString”,_ arguments [“connectionString”],“System.Data.SqlClient”); config.ConnectionStrings.ConnectionStrings.Add(connectionStringSettings); config.Save(ConfigurationSaveMode.Modified); ConfigurationManager.RefreshSection( “的ConnectionStrings”);
是的,您绝对可以在运行时在app.config中添加/修改/删除设置。 这就是我通常这样做的方式。
using System.Configuration; // don't forget to add the system.configuration dll to your references.
public static void CreateConnectionString(string datasource, string initialCatalog, string userId, string password)
{
try
{
//Integrated security will be off if either UserID or Password is supplied
var integratedSecurity = string.IsNullOrEmpty(userId) || string.IsNullOrEmpty(password);
//Create the connection string using the connection builder
var connectionBuilder = new SqlConnectionStringBuilder
{
DataSource = datasource,
InitialCatalog = initialCatalog,
UserID = userId,
Password = password,
IntegratedSecurity = integratedSecurity
};
//Open the app.config for modification
var config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
//Retreive connection string setting
var connectionString = config.ConnectionStrings.ConnectionStrings["ConnectionStringName"];
if (connectionString == null)
{
//Create connection string if it doesn't exist
config.ConnectionStrings.ConnectionStrings.Add(new ConnectionStringSettings
{
Name = ConnectionName,
ConnectionString = connectionBuilder.ConnectionString,
ProviderName = "System.Data.SqlClient" //Depends on the provider, this is for SQL Server
});
}
else
{
//Only modify the connection string if it does exist
connectionString.ConnectionString = connectionBuilder.ConnectionString;
}
//Save changes in the app.config
config.Save(ConfigurationSaveMode.Modified);
}
catch (Exception)
{
//TODO: Handle exception
}
}
希望这可以帮助。
忽略了这个答案,看下面......
是的 - 看看这个 。
这种方法可能就是你所追求的
System.Configuration.ConfigurationManager.ConnectionStrings.Add(new ConnectionStringSettings("new name", "new string");
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