代码之家 › 专栏 › 技术社区 › Nick Spreitzer

如何从SettingsProperty检索Description属性?

settings properties c#

Nick Spreitzer · 技术社区 · 14 年前

对于应用程序设置中的每个项目,我都将文本添加到其 Description Property

任何关于如何正确检索value Description属性的见解都将非常感激。谢谢。:)

public void MyMethod()
    {
        SettingsPropertyCollection MyAppProperties = 
            Properties.Settings.Default.Properties;

        IEnumerator enumerator = MyAppProperties.GetEnumerator();

        // Iterate through all the keys to see what we have....
        while (enumerator.MoveNext())
        {
            SettingsProperty property = (SettingsProperty)enumerator.Current;
            ICollection myKeys = property.Attributes.Keys;

            foreach (object theKey in myKeys)
                System.Diagnostics.Debug.Print(theKey.ToString());
                // One of the keys returned is: 
                   System.Configuration.SettingsDescriptionAttribute
        }

        enumerator.Reset();

        while (enumerator.MoveNext())
        {
            SettingsProperty property = (SettingsProperty)enumerator.Current;

            string propertyValue = property.DefaultValue.ToString();

            // This fails: Null Reference 
            string propertyDescription = 
                property.Attributes["System.Configuration.SettingsDescriptionAttribute"].ToString();

            // Do stuff with strings...
        }
    }

3 回复 | 直到 14 年前

Jeffrey L Whitledge 14 年前

问题是Attributes[]索引器中的键不接受字符串。

试试这个:

    public void MyMethod()
    {
        SettingsPropertyCollection MyAppProperties =
            Properties.Settings.Default.Properties;

        IEnumerator enumerator = MyAppProperties.GetEnumerator();
        object settingsDescriptionAttribute = null;

        // Iterate through all the keys to see what we have.... 
        while (enumerator.MoveNext())
        {
            SettingsProperty property = (SettingsProperty)enumerator.Current;
            ICollection myKeys = property.Attributes.Keys;

            foreach (object theKey in myKeys)
            {
                System.Diagnostics.Debug.Print(theKey.ToString());
                if (theKey.ToString() == "System.Configuration.SettingsDescriptionAttribute")
                    settingsDescriptionAttribute = theKey;
            }
        }

        enumerator.Reset();

        while (enumerator.MoveNext())
        {
            SettingsProperty property = (SettingsProperty)enumerator.Current;

            string propertyValue = property.DefaultValue.ToString();

            // This fails: Null Reference  
            string propertyDescription =
                property.Attributes[settingsDescriptionAttribute].ToString();

            // Do stuff with strings... 
        }
    }

Hans Passant 14 年前

此代码显示了具有描述的所有设置:

using System;
using System.Configuration;
using System.Reflection;

namespace ConsoleApplication1 {
  class Program {
    static void Main(string[] args) {
      var all = typeof(Properties.Settings).GetProperties();
      foreach (var prop in all) {
        var attr = (SettingsDescriptionAttribute[])prop.GetCustomAttributes(typeof(SettingsDescriptionAttribute), false);
        if (attr.Length > 0) 
          Console.WriteLine("{0}: {1}", prop.Name, attr[0].Description);
      }
      Console.ReadLine();
    }
  }
}

Igby Largeman 14 年前

HashTable

    public void MyMethod()
    {
        SettingsPropertyCollection MyAppProperties = 
            Properties.Settings.Default.Properties;

        IEnumerator enumerator = MyAppProperties.GetEnumerator();

        // Iterate through all the keys to see what we have....
        while (enumerator.MoveNext())
        {
            SettingsProperty property = (SettingsProperty)enumerator.Current;
            ICollection myKeys = property.Attributes.Keys;

            foreach (object theKey in myKeys)
            {
                if (property.Attributes[theKey].GetType().Name == "SettingsDescriptionAttribute")
                {
                    SettingsDescriptionAttribute sda = property.Attributes[theKey] as SettingsDescriptionAttribute;
                    System.Diagnostics.Debug.Print(sda.Description); // prints the description
                }
            }
        }

    }