public static void UpdateDataTable <T>(DataTable dt, List <T> list)
{
if (list.Count == 0)
{
dt.Rows.Clear();
}
else if (dt.Rows.Count > list.Count)
{
int num = dt.Rows.Count - list.Count;
for (int i = 0; i < num; i++)
{
dt.Rows.RemoveAt(list.Count - 1);
}
}
if (list.Count > dt.Rows.Count)
{
int num = list.Count - dt.Rows.Count;
for (int i = 0; i < num; i++)
{
T _obj = (T)System.Activator.CreateInstance(typeof(T));
dt.Rows.Add(ConvertDataExtend.ToDataRow(_obj).ItemArray);
}
}
for (int i = 0; i < list.Count; i++)
{
UpdateDataTable(dt, i, list[i]);
}
}
public static void ToObject(DataRow dr, object obj)
{
//列名
string columnName;
//列数量
int column = dr.Table.Columns.Count;
//遍历所有列
for (int i = 0; i < column; i++)
{
columnName = dr.Table.Columns[i].ColumnName;
object objectValue = dr[i];
objectValue = objectValue == DBNull.Value ? null : objectValue;
if (obj.GetType().GetProperty(columnName) != null)
{
if (obj.GetType().GetProperty(columnName).PropertyType == typeof(Int32))
{
objectValue = ConvertDataExtend.ToInt32(objectValue, 0);
}
if (obj.GetType().GetProperty(columnName).PropertyType == typeof(Decimal))
{
objectValue = ConvertDataExtend.ToDecimal(objectValue, 0);
}
if (obj.GetType().GetProperty(columnName).PropertyType == typeof(DateTime))
{
objectValue = Convert.ToDateTime(objectValue);
}
obj.GetType().GetProperty(columnName).SetValue(obj, objectValue, null);
}
}
}
public static void UpdateDataTableForSort <T>(DataTable dt, List <T> list)
{
dt.Rows.Clear();
int num = list.Count;
for (int i = 0; i < num; i++)
{
T _obj = (T)System.Activator.CreateInstance(typeof(T));
dt.Rows.Add(ConvertDataExtend.ToDataRow(_obj).ItemArray);
}
for (int i = 0; i < list.Count; i++)
{
UpdateDataTable(dt, i, list[i]);
}
}