Question

我的MySQL数据库中有两个表autogen

public partial class adviser
{
    public int adviserId { get; set; }
    public string employeeNo { get; set; }
    public string lastName { get; set; }
    public string firstName { get; set; }
    public string middleName { get; set; }
    public Nullable<int> statId { get; set; }
    public Nullable<int> createdById { get; set; }
    public Nullable<System.DateTime> createdOn { get; set; }

    public virtual stat stat { get; set; }
    public virtual user user { get; set; }  
}

public partial class stat
{
    public stat()
    {
        this.advisers = new HashSet<adviser>();            
    }

    public int statId { get; set; }
    public string statName { get; set; }
    public string details { get; set; }

    public virtual ICollection<adviser> advisers { get; set; }  
}

然后我有这个方法来获取顾问的集合

public List<adviser> GetList(AdviserParam p)
{
    List<adviser> items;
    using (VotingContext context = new VotingContext())
    {
        items = context.advisers.Include("stat").Where(x  =>
            (x.adviserId == p.AdviserId || p.AdviserId == 0) 
            && (x.employeeNo.Contains(p.EmployeeNo) || p.EmployeeNo == "") 
            && (x.lastName.Contains(p.LastName) || p.LastName == "") 
            && (x.firstName.Contains(p.FirstName) || p.FirstName == "") 
            && (x.middleName.Contains(p.MiddleName) || p.MiddleName == "") 
            // && (x.statId == 1)
            ).ToList();     
    }

    return items;
}

然后我使用这些代码将它们放入数据网格视图（获胜形式），我编辑了列，以便它不会显示adviserId和statId属性。

ItemsGridView.AutoGenerateColumns = false;
ItemsGridView.DataSource = vm.EntityList; // vm.EntityList is where I put the returned advisers from the GetList() method)

但是dgv不显示statName（来自stats表）。如何让它出现？

Answer 1

要从 stat 对象中获取价值，您可以选择anonymous type并包含所有必需的属性。

我已经展示了一个包含statName和employeeNo的简单示例。

var items = context.advisers.Where(x => x.adviserId == yourAdviserID)
        .Select(a=> new {name = a.stat.statName, employee=a.employeeNo}).ToList();

现在，如果您将项绑定到Datagridview，则只会看到名称和员工列。

如果您不想显示advisorID和statID，那么就不要将它们包含在新的匿名类型中。

如何使用LINQ在datagridview上显示外表的属性？

1 个答案: