Question

我有以下代码到GET字典类型的会话变量值。请参阅以下代码

在我的代码中，我只是使用下面的代码从我的会话变量中获取任何值：

string panelOpen = SessionDictionary.GetValue("FORMDATA", "panelOpen");

public class SessionDictionary
{
    public static string GetValue(string dictionaryName, string key)
    {
        string value = string.Empty;
        try
        {
            if (HttpContext.Current.Session[dictionaryName] != null)
            {
                Dictionary<string, string> form = (Dictionary<string, string>)HttpContext.Current.Session[dictionaryName];
                if (form.ContainsKey(key))
                {
                    if (!string.IsNullOrEmpty(key))
                    {
                        value = form[key];
                    }
                }
            }
        }
        catch (Exception ex)
        {
            Logger.Error("{0}: Error while checking Session value from Dictionary", ex, "SessionDictionary");
        }
        return value;
    }
}

现在我想写一个方法来设置特定会话密钥的值，例如

SessionDictionary.SetValue("FORMDATA", "panelOpen") = "First";

现在如果我再次使用下面的代码，它应该为我的panelOpen键给我“First”。

string panelOpen = SessionDictionary.GetValue("FORMDATA", "panelOpen");

请建议！

Answer 1

除了行value = form[key];之外，“SetValue”几乎相同。那应该是form[key] = value;。

无需“将字典设置回会话”，因为会话中仍然存在对该字典的引用。

示例：

设定值

public static void SetValue(string dictionaryName, string key, string value)
{
  if (!String.IsNullOrEmpty(key))
  {
    try
    {
        if (HttpContext.Current.Session[dictionaryName] != null)
        {
            Dictionary<string, string> form = (Dictionary<string, string>)HttpContext.Current.Session[dictionaryName];
            if (form.ContainsKey(key))
            {
                form[key] = value;
            }
        }
    }
    catch (Exception ex)
    {
        Logger.Error("{0}: Error while checking Session value from Dictionary", ex, "SessionDictionary");
    }
  }
}

删除值：

public static void RemoveValue(string dictionaryName, string key)
{
  if (!String.IsNullOrEmpty(key))
  {
    try
    {
        if (HttpContext.Current.Session[dictionaryName] != null)
        {
            Dictionary<string, string> form = (Dictionary<string, string>)HttpContext.Current.Session[dictionaryName];
            form.Remove(key); // no error if key didn't exist
        }
    }
    catch (Exception ex)
    {
        Logger.Error("{0}: Error while checking Session value from Dictionary", ex, "SessionDictionary");
    }
  }
}

如何在字典中设置值类型会话变量？

1 个答案: