14

我继承了一个项目，该项目在尝试在 .Net 4.0 项目中检索丢失的密码时给用户带来上述错误。我通过并找到了问题点，但问题是，生成的值似乎是正确的，所以我不知道为什么会发生错误。提前感谢任何可以查看以下代码并帮助我了解如何修复它的人。如果需要更多信息，请告诉我。我浏览了所有我能找到的东西，但没有任何线索能提供我可以使用的线索。问题是我无法追踪键/值组合应该输入的位置，我也不知道如何添加它。代码如下。

我在http://forums.asp.net/t/1926444.aspx/1?given+key+was+not+present+in+the+dictionary发表了类似的讨论，但没有人知道如何帮助我。

void EmailUser(User user)
{
    user.ChangePasswordID = Guid.NewGuid();
    user.Save();
    MailMessage email = new MailMessage();
    //problem line below
    email.From = new MailAddress(Settings.LostPasswordEmailFrom);
    email.To.Add(new MailAddress(uxEmail.Text));
    email.Subject = Settings.LostPasswordSubject;
    email.Body = EmailTemplateService.HtmlMessageBody(EmailTemplates.MembershipPasswordRecovery, new { Body = Settings.LostPasswordText, BeginRequired = "", EndRequired = "", UserName = user.Name, GUID = user.ChangePasswordID.ToString() });
    email.IsBodyHtml = true;
    SmtpClient client = new SmtpClient();
    client.Send(email);

    uxSuccessPH.Visible = true;
    uxQuestionPanel.Visible = false;
    uxUserInfoPanel.Visible = false;
    uxUserNameLabelSuccess.Text = uxEmail.Text;
}

/// <summary>
/// The address that the lost password email will be sent from
/// </summary>
public static string LostPasswordEmailFrom
{
    get
    {
        if (String.IsNullOrEmpty(SiteSettings.GetSettingKeyValuePair()["LA_MembershipProvider_lostPasswordEmailFrom"]))
            return Globals.Settings.FromEmail;
        return SiteSettings.GetSettingKeyValuePair()["LA_MembershipProvider_lostPasswordEmailFrom"];
    }
}
4

1 回答 1

20

当您调用时， SiteSettings.GetSettingKeyValuePair()["LA_MembershipProvider_lostPasswordEmailFrom"])如果没有命名键LA_MembershipProvider_lostPasswordEmailFrom，您将收到“字典中不存在给定键”错误。您可以做的是，首先检查键是否存在，然后获取值。您可以执行以下操作

public static string LostPasswordEmailFrom
{
    get
    { 
        var kvp = SiteSettings.GetSettingKeyValuePair();

        if (kvp == null || !kvp.ContainsKey("LA_MembershipProvider_lostPasswordEmailFrom"))
            return Globals.Settings.FromEmail;
        return kvp["LA_MembershipProvider_lostPasswordEmailFrom"];
    }
}
于 2013-08-27T06:05:10.170 回答