小编use*_*ser的帖子

@Html.DropDownListFor(m => m.branch, CommonMethod.getBranch("",Model.branch), "--Select--", new { @multiple = "multiple" })

@Html.DropDownListFor(m => m.division, CommonMethod.getDivision(Model.branch,Model.division), "--Select--", new { @multiple = "multiple" })

我有两个DropDownListFor实例.我想为之前为Model.branch和Model.division存储的值设置为true.这些是存储的id的字符串数组

class CommonMethod
{
    public static List<SelectListItem> getDivision(string [] branchid , string [] selected)
    {
        DBEntities db = new DBEntities();
        List<SelectListItem> division = new List<SelectListItem>();
        foreach (var b in branchid)
            {
                var bid = Convert.ToByte(b);
                var div = (from d in db.Divisions where d.BranchID == bid select d).ToList();
                foreach (var d in div)
                {
                    division.Add(new SelectListItem { Selected …

我通过C#发送邮件时遇到异常

SmtpClient client = new SmtpClient() 

as System.Security.Cryptography.CryptographicException:句柄无效.

MailMessage mail = new MailMessage(from,to);

            mail.To.Add(to);
            mail.From = new MailAddress(from, "", System.Text.Encoding.UTF8);

            mail.Subject = "This is a test mail";

            mail.SubjectEncoding = System.Text.Encoding.UTF8;

            mail.Body = fr.message;

            mail.BodyEncoding = System.Text.Encoding.UTF8;

            mail.IsBodyHtml = true;

            mail.Priority = MailPriority.High;

            SmtpClient client = new SmtpClient();

            //Add the Creddentials- use your own email id and password
            client.Credentials = new System.Net.NetworkCredential(from, Password);

            client.Port = 587; // Gmail works on this port

            client.Host = "smtp.gmail.com";

            client.EnableSsl = true; //Gmail works on …

我在MVC中使用UrlAttribute

但它不接受localhost网址,例如http:// localhost/GCWeb

[Url(ErrorMessage = "please_enter_valid_ftp_url", ErrorMessage = null)] 
public string Url { get; set; }

这会验证网址,但不会验证localhost网址.

我怎样才能做到这一点？

我们可以从剃刀下拉列表控件中选择多个项目吗？即为

@ Html.DropDownListFor(m => m.Country,CountryList as SelectList," - Select--")

try
{
    // throws IOException
}
catch(Exception e)
{
}
catch(IOException e)
{
}

当try块抛出时IOException,它将调用第一个catch块而不是第二个块.任何人都可以解释这一点.为什么它会调用第catch一块？

我在数据库中有2个Field FromDate和ToDate.我希望结果LINQ查询具有2个日期的月差异和一些动态值的记录.

实际上我有一个数据库表作为EmploymentHistory,字段NameOfCompany为nvarchar(50),ProfileID为bigint,EmoploymentFrom为datetime,EmploymentUpto为datetime,IsCurrentEmployer为bit.

ProfileID是Profile的引用键我希望按月经验为所有配置文件生成查询.

如果IsCurrentEmployer为true,那么EmploymentUpto为null.