ConnectionString属性尚未初始化错误

Question

我使用了MySQL数据库的asp.net web应用程序，具有以下connetcion字符串在web.config：

<add name="techConnectionString" connectionString="server=vm-tmysql01;User Id=user;database=tech;password=pass" providerName="MySql.Data.MySqlClient"/> 

这是我的代码中号使用从web.config中获取连接字符串：

System.configuration.configurationmanaget.connectionstrings["techConnectionString"].connectionstring; 

出于某种原因，我得到的错误：

The ConnectionString property has not been initialized. An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

和堆栈跟踪是：

[InvalidOperationException: The ConnectionString property has not been initialized.] 
    System.Data.SqlClient.SqlConnection.PermissionDemand() +6316916 
    System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory) +6296606 
    System.Data.SqlClient.SqlConnection.Open() +300 

我能够通过数据源连接到数据库在Visual Studio和花的ConnectionString从那里。 我真的需要一些帮助，是否有任何问题与我的连接字符串？

Answer 1

改变连接字符串作为

<connectionStrings> 
    <add name="techConnectionString" connectionString="SERVER=vm-tmysql01; DATABASE=tech; UID=user; 
PASSWORD=pass" providerName="MySql.Data.MySqlClient"/> 
</connectionStrings> 

，你可以得到使用System.Configuration（需要添加引用System.Configuration）

var constring =ConfigurationManager.ConnectionStrings["techConnectionString"].ConnectionString; 

Answer 2

的问题是不是与引黄字符串连接，这是与c＃代码试图从web.config文件到达它。

我试图用：

System.Configuration.ConfigurationManager.ConnectionStrings["techConnectionString"].ConnectionString; 

，但我需要使用：

System.Web.Configuration.WebConfigurationManager.ConnectionStrings["techConnectionString"].ConnectionString;