dataset和實體類 之間的轉換

//dataset轉實體類

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>

/// 将實體類轉換成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;