【C#】利用反射构建实体

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data;
using System.Reflection;

namespace RftToModel {
class Program {
static void Main(string[] args) {

var result = ToModel<TestModel>.GetDelegate_ToModelList(BuildSampleTable());

foreach (var item in result) {
Console.WriteLine(item);
}

Console.Read();

}

static DataTable BuildSampleTable() {
DataTable result = new DataTable();
result.Columns.Add("ID", typeof(int));
result.Columns.Add("Name", typeof(string));
result.Columns.Add("IsDeleted", typeof(bool));

result.Rows.Add(new object[] { 1, "M.K", false });
result.Rows.Add(new object[] { 2, "B.G", true });

return result;

}

}

public class TestModel {
public int ID { get; set; }
public string Name { get; set; }
public bool IsDeleted { get; set; }

public override string ToString() {
return string.Format("ID:{0} Name:{1} IsDeleted:{2}", ID, Name, IsDeleted);
}
}

public delegate void SetValue<T>(T value);

public static class ToModel<T> where T : class, new() {

private static Delegate CreateSetDelegate(T model, string propertyName) {
MethodInfo mi = model.GetType().GetProperty(propertyName).GetSetMethod();
//这里构造泛型委托类型
Type delType = typeof(SetValue<>).MakeGenericType(GetPropertyType(propertyName));

return Delegate.CreateDelegate(delType, model, mi);
}

private static Type GetPropertyType(string propertyName) {
return typeof(T).GetProperty(propertyName).PropertyType;
}

public static IList<T> GetDelegate_ToModelList(DataTable dt) {
IList<T> list = new List<T>();
if (dt == null || dt.Rows.Count < 1) return list;

Delegate setDelegate;
foreach (DataRow dr in dt.Rows) {
T model = new T();
foreach (DataColumn dc in dt.Columns) {
setDelegate = CreateSetDelegate(model, dc.ColumnName);
//这里改变类型
setDelegate.DynamicInvoke(Convert.ChangeType(dr[dc.ColumnName], GetPropertyType(dc.ColumnName)));
}
list.Add(model);
}
return list;
}
}

}