c# datarow[] 转换成 datatable, List<T> 转datatable

DdataRow[]转成Datatable

 private DataTable ToDataTable(DataRow[] rows)
{
if (rows == null || rows.Length == ) return null;
DataTable tmp = rows[].Table.Clone(); // 复制DataRow的表结构
foreach (DataRow row in rows)
{ tmp.ImportRow(row); // 将DataRow添加到DataTable中
}
return tmp;
}

List<T> 转datatable

     #region List<T> 转table
public static DataTable ListToDataTable<T>(List<T> entitys)
{
//检查实体集合不能为空
if (entitys == null || entitys.Count < )
{
throw new Exception("需转换的集合为空");
}
//取出第一个实体的所有Propertie
Type entityType = entitys[].GetType();
PropertyInfo[] entityProperties = entityType.GetProperties(); //生成DataTable的structure
//生产代码中,应将生成的DataTable结构Cache起来,此处略
DataTable dt = new DataTable();
for (int i = ; i < entityProperties.Length; i++)
{
//dt.Columns.Add(entityProperties[i].Name, entityProperties[i].PropertyType);
dt.Columns.Add(entityProperties[i].Name);
}
//将所有entity添加到DataTable中
foreach (object entity in entitys)
{
//检查所有的的实体都为同一类型
if (entity.GetType() != entityType)
{
throw new Exception("要转换的集合元素类型不一致");
}
object[] entityValues = new object[entityProperties.Length];
for (int i = ; i < entityProperties.Length; i++)
{
entityValues[i] = entityProperties[i].GetValue(entity, null);
}
dt.Rows.Add(entityValues);
}
return dt;
}
#endregion
05-08 07:50