dataset和实体类 之间的转换

出处：http://www.cnblogs.com/xinlang/archive/2009/08/04/1538199.html

//dataset转实体类 public static IList<T> FillModel(DataSet ds) { List<T> l = new List<T>(); T model = default(T);

if (ds.Tables[0].Columns[0].ColumnName == "rowId") { ds.Tables[0].Columns.Remove("rowId"); }

 

foreach (DataRow dr in ds.Tables[0].Rows) {

model = Activator.CreateInstance<T>();

foreach (DataColumn dc in dr.Table.Columns) {

PropertyInfo pi = model.GetType().GetProperty(dc.ColumnName); if (dr[dc.ColumnName] != DBNull.Value) pi.SetValue(model, dr[dc.ColumnName], null); else pi.SetValue(model, null, null);

} l.Add(model); }

return l;

}

/// <summary> /// 将实体类转换成DataTable /// </summary> /// <typeparam name="T"></typeparam> /// <param name="i_objlist"></param> /// <returns></returns> public static DataTable Fill<T>(IList<T> objlist) { if (objlist == null || objlist.Count <= 0) { return null; } DataTable dt = new DataTable(typeof(T).Name); DataColumn column; DataRow row;

System.Reflection.PropertyInfo[] myPropertyInfo = typeof(T).GetProperties(BindingFlags.Public | BindingFlags.Instance);

foreach (T t in objlist) { if (t == null) { continue; }

row = dt.NewRow();

for (int i = 0, j = myPropertyInfo.Length; i < j; i++) { System.Reflection.PropertyInfo pi = myPropertyInfo[i];

string name = pi.Name;

if (dt.Columns[name] == null) { column = new DataColumn(name, pi.PropertyType); dt.Columns.Add(column); }

row[name] = pi.GetValue(t, null); }

dt.Rows.Add(row); } return dt; }