我目前正在创建一个登录表单,并有以下代码:

string connectionString = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
try
{
    using (OdbcConnection connect = new OdbcConnection(connectionString))
    {
        connect.Open();
        OdbcCommand cmd = new OdbcCommand("SELECT username, password FROM receptionist", connect);
        OdbcDataReader reader = cmd.ExecuteReader();

        if (username_login.Text == username && password_login.Text == password)
        {
            this.Hide();
            MessageBox.Show("Invalid User", "Login Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
            this.Close();
        }
        else 
            MessageBox.Show("Invalid User", "Login Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
        connect.Close();
    }
}
catch (OdbcException ex)
{
    MessageBox.Show(ex.Message, "error", MessageBoxButtons.OK, MessageBoxIcon.Error);
}

但每当我尝试输入用户名和密码时,就会出现一个名为“配置系统初始化失败”的错误。这是什么问题,我怎么解决它?


当前回答

对象中创建了副本,有时会出现错误

c:\用户\应用数据\本地\"你的应用名称"…

删除这个文件夹就可以了。试一试。

其他回答

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <appSettings>
    <add key="xyz" value="123" />    
  </appSettings>
</configuration>

我还得到了

'System.Configuration.ConfigurationErrorsException' in System.Configuration.dll

如果你有窗口检查斜杠/我正在与一个在linux工作的人一起工作的项目,所以他颠倒了它们。

如果你有用户范围设置,你也可以有一个用户。配置文件在[Userfolder]\AppData\Local\[ProjectName]文件夹中的某处。

如果您稍后删除用户范围设置的用户。Config不会自动被删除,它的存在可能会导致相同的错误消息。删除文件夹对我有用。

确保您的配置文件(web。Config如果web,或app.config如果windows)在你的项目开始:

<?xml version="1.0"?>
<configuration>
    <configSections>
        <sectionGroup name="applicationSettings" 
                      type="System.Configuration.ApplicationSettingsGroup, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" >

            <section name="YourProjectName.Properties.Settings" 
                     type="System.Configuration.ClientSettingsSection, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" 
                     requirePermission="false" />

        </sectionGroup>
    </configSections>
</configuration>

注意,在configuration元素中,第一个子元素必须是configSections元素。

在section元素的name属性中,确保将YourProjectName替换为实际项目的名称。

它发生在我身上,我在一个类库项目中创建了一个webservice,然后我复制(覆盖)配置文件(为了带来端点配置)到我的windows应用程序,我开始有同样的问题。我无意中删除了configSections。

I know this has already been answered but I had exactly the same problem in my unit tests. I was tearing my hair out - adding an appSettings section, and then declaring the configuration section as per the answer. Finally found out that I had already declared an appSettings section further up my config file. Both sections pointed to my external settings file "appSettings.config" but the first appSettings element using the attribute file whilst the other used the attribute configSource. I know the question was about the connectionStrings. Sure enough, this happens if the appSettings element is the connectionStrings element being duplicated with different attributes.

希望这可以为其他人提供解决方案,以免他们重蹈我的覆辙,浪费一两个小时。感叹我们开发者的生活。有时候我们在调试上浪费的时间比在开发上还要多!