日期:2014-05-18  浏览次数:21429 次

怎样通过反射给嵌套的实体类属性赋值
C# code

    /// <summary>
    /// 实体转换辅助类
    /// </summary>
    public class ModelConvertHelper<T> where T : new()
    {
        public static IList<T> ConvertToModel(DataTable dt)
        {
            // 定义集合
            IList<T> ts = new List<T>();
            // 获得此模型的类型
            Type type = typeof(T);

            foreach (DataRow dr in dt.Rows)
            {
                T t = new T();
                // 获得此模型的公共属性
                PropertyInfo[] propertys = t.GetType().GetProperties();

                foreach (PropertyInfo pi in propertys)
                {
                    // 检查DataTable是否包含此列
                    if (dt.Columns.Contains(pi.Name))
                    {
                        // 判断此属性是否有Setter
                        if (!pi.CanWrite) continue;

                        object value = dr[pi.Name];
                        if (value != DBNull.Value)
                            pi.SetValue(t, value, null);
                    }
                    else
                    {
                        if ((pi.PropertyType).FullName.Contains("SMTModel.Model"))
                        {
                            ObjectHandle oh = Activator.CreateInstance("SMTModel", (pi.PropertyType).FullName);
                            object oo = oh.Unwrap();
                            //递归
                            //oo = ModelConvertHelper<oo>.ConvertToModel(dt)[0];
                        }
                    }
                }
                ts.Add(t);
            }
            return ts;
        }
    }



因为需求中实体类属性可能还有其他的实体类,所以想用反射加递归的方式来完成赋值,递归中这条//oo = ModelConvertHelper<oo>.ConvertToModel(dt)[0]; 不知道如何去写,还望高手指教= =

------解决方案--------------------
[C#] 
public DataTable MakeDataTable(){

DataTable myTable;
DataRow myNewRow; 
// Create a new DataTable.
myTable = new DataTable("My Table");
 
// Create DataColumn objects of data types.
DataColumn colString = new DataColumn("StringCol");
colString.DataType = System.Type.GetType("System.String");
myTable.Columns.Add(colString); 
 
DataColumn colInt32 = new DataColumn("Int32Col");
colInt32.DataType = System.Type.GetType("System.Int32");
myTable.Columns.Add(colInt32);
 
DataColumn colBoolean = new DataColumn("BooleanCol");
colBoolean.DataType = System.Type.GetType("System.Boolean");
myTable.Columns.Add(colBoolean);
 
DataColumn colTimeSpan = new DataColumn("TimeSpanCol");
colTimeSpan.DataType = System.Type.GetType("System.TimeSpan");
myTable.Columns.Add(colTimeSpan);
 
DataColumn colDateTime = new DataColumn("DateTimeCol");
colDateTime.DataType = System.Type.GetType("System.DateTime");
myTable.Columns.Add(colDateTime);
 
DataColumn colDecimal = new DataColumn("DecimalCol");
colDecimal.DataType = System.Type.GetType("System.Decimal");
myTable.Columns.Add(colDecimal);
 
// Populate one row with values.
myNewRow = myTable.NewRow();
 
myNewRow["StringCol"] = "Item Name";
myNewRow["Int32Col"] = 2147483647;
myNewRow["BooleanCol"] = true;
myNewRow["TimeSpanCol"] = new TimeSpan(10,22,10,15,100);
myNewRow["DateTimeCol"] = System.DateTime.Today;
myNewRow["DecimalCol"] = 64.0021;
myTable.Rows.Add(myNewRow);
return myTable