在appSettings中存储值

本文关键字：存储 appSettings | 更新日期: 2023-09-27 18:16:29

我试图在我的配置文件中存储一个userID，然后由于各种原因我想在整个程序中访问它。我在配置文件中有appSettings部分，像这样;

<appSettings>
  <add key="userID" value="1" />
</appSettings>

然后在一个方法中设置值;

private void hrButton_Click(object sender, RoutedEventArgs e)
{
    DataAccessor da = new DataAccessor();
    DataRowView dataRow = (DataRowView)dataGrid.SelectedItem;
    // Open App.Config of executable
    Configuration config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
    // Add an Application Setting.
    config.AppSettings.Settings.Add("userID", dataRow.Row.ItemArray[0].ToString());
    // Save the changes in App.config file.
    config.Save(ConfigurationSaveMode.Modified);
    da.SetUserDetails();
    NavigationService.Navigate(new Uri(@"View/HRSystem/HRSystem.xaml", UriKind.Relative));
}

在试图访问和使用它之前;

public List<string> SetUserDetails()
{
    string userID = ConfigurationManager.AppSettings.Get("userID");
    MessageBox.Show("userID: "+userID);
    string constr = ConfigurationManager.ConnectionStrings["dbfString"].ConnectionString;
    using (OleDbConnection dbfCon = new OleDbConnection(constr))
    {
        try
        {
            dbfCon.Open();
            OleDbDataReader myReader;
            OleDbCommand sqlCmd = new OleDbCommand("SELECT em_pplid FROM employs WHERE em_pplid = "+ userID + "", dbfCon);
            myReader = sqlCmd.ExecuteReader();
            List<string> listUser = new List<string>();
            while (myReader.Read())
            {
                listUser.Add(myReader[0].ToString());
                return listUser;
            }
        }
        catch (MySqlException)
        {
            throw;
        }
    }
    return null;
}

然而，当我在消息框中显示userID时，它仍然被设置为1。我以前没有使用过appSettings部分，有什么原因它总是1吗?我运行的是Visual Studio 2015, c# WPF。

在appSettings中存储值

在config.AppSettings.Settings.Add();上方添加config.AppSettings.Settings.Remove("userID");

但是保存这些信息的正确方法是使用设置文件

: 

Properties.Settings.Default.userID = dataRow.Row.ItemArray[0].ToString();
Properties.Settings.Default.Save();

检索:

var userId = Properties.Settings.Default.userID;

try

config.AppSettings.Settings.Remove('userID');
config.AppSettings.Settings.Add('userID', dataRow.Row.ItemArray[0].ToString());

但是您不应该在配置文件中存储用户id。您应该将其保存在会话或Cookie

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