Question

我真的想知道是否可行。

班级

public class XLRSV : AuditableEntity<long>
    {
        [DisplayName("INDEX")]
        public int IDX { get; set; }

        .
        .
        30 more
        .
        .

        [DisplayName("REMOTE STATUS")]
        public int EPSR_REMOTE_STATUS { get; set; }

        [DisplayName("SCAN STATUS")]
        public int EPSR_SCAN_STATUS { get; set; }
    }

存储库

IEnumerable<XLRSV> GetScanData(int id);

控制器

var result = _xlrsvSvr.GetScanData(id).FirstOrDefault();

Normaly使用

int idx = result.IDX;

所以，我想在此

上使用make list变量

var column = from name in typeof(XLRSV).GetProperties()
                     select name;

        List<object> columnName = new List<object>();
        List<object> columnDisplayName = new List<object>();

        MemberInfo cname;
        MemberInfo cDispName;

        foreach (var item in column)
        {
            cname = typeof(XLRSV).GetProperty(item.Name);
            columnName.Add(cname.Name);

            cDispName = typeof(XLRSV).GetProperty(cname.Name);
            columnDisplayName.Add(cDispName.CustomAttributes.Select(x => x.NamedArguments.Select(y => y.TypedValue.Value)).OfType<System.ComponentModel.DataAnnotations.DisplayAttribute>());                
        }

现在我正在使用此代码

new {name = "IDX", displayName = columnDisplayName[0].ToString(), result=result.IDX, checkPoint=""},
new {name = "EPSR_UNIQUE_NUMBER", displayName = columnDisplayName[1].ToString(), result=result.EPSR_UNIQUE_NUMBER, checkPoint=""},
.
.over 30 more
.
new {name = "EPSR_SCAN_STATUS", displayName = columnDisplayName[22].ToString(), result="", checkPoint=""},

所以，我想使用像

这样的循环

for (int i = 0; i< columnName.count()) {
    new {
    name = columnName[i].toString(), 
    displayName = columnDisplayName[i].ToString(), 
    result=result.columnName[i].toString(),  //here i want to use varialbe
    checkPoint=""
    },
}

我找不到方法。它可以吗？

Answer 1

你的问题不是最明确的，但我相信我理解你想要完成的事情。我相信这是一个简单的反思问题。除了DisplayName之外，你似乎还有其他所需的东西。

我已经创建了一个功能，您可以将其放在XLRSV课程和课程上，以帮助您检索我认为您想要的信息。有关每个功能/类目的的说明，请参阅注释。

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Reflection;

// This will grab the desired info for each public instance property on the class.
// Put this function inside your XLRSV. If you can't change XLRSV adjust this to be
// a method extension.
public IEnumerable<ObjectPropertyInfo<XLRSV>> GetObjectPropertyInfo()
{
    var type = typeof(XLRSV);
    var properties = type.GetProperties(BindingFlags.Public | BindingFlags.Instance);

    var list = new List<ObjectPropertyInfo<XLRSV>>();
    foreach (var property in properties)
    {
        list.Add(new ObjectPropertyInfo<XLRSV>(property, this));
    }
    return list;
}

// This will represent the data you want and given the property info and object
// will retrieve and set all the values as needed. It appears you had most of this
// figured out other than the DisplayName which is retrieved via GetCustomAttribute.
public class ObjectPropertyInfo<T> where T : class
{
    public string Name { get; set; }
    public string DisplayName { get; set; }
    public string Result { get; set; }
    public string CheckPoint { get; set; }

    /// <summary>
    /// Constructs a ClassInfo given a property name and an object from which to retrieve the value.
    /// </summary>
    public ObjectPropertyInfo(PropertyInfo propInfo, T obj)
    {
        if (propInfo == null) { throw new ArgumentNullException("propInfo was null."); }

        Name = propInfo.Name;
        DisplayName = GetDisplayName(propInfo);
        Result = GetValue(propInfo, obj);
        CheckPoint = "";
    }

    /// <summary>
    /// Retrieves the display name of the property if one is available.
    /// </summary>
    private string GetDisplayName(PropertyInfo propInfo)
    {
        if (propInfo == null) { return null; }

        var displayNameAttr = propInfo.GetCustomAttribute<DisplayNameAttribute>();
        if (displayNameAttr == null) { return propInfo.Name; }

        return displayNameAttr.DisplayName;
    }

    /// <summary>
    /// Retrieves the value of an object given which property.
    /// </summary>
    private string GetValue(PropertyInfo propInfo, T obj)
    {
        if (propInfo == null) { return null; }
        return propInfo.GetValue(obj)?.ToString();
    }
}

我希望这就是你要找的东西。

如何在MVC5中使用Enumerable上的变量

1 个答案: