/// <summary>
/// 將泛類型集合List類轉換成DataTable
/// </summary>
/// <param name="list">泛類型集合</param>
/// <returns></returns>
public static DataTable ListToDataTable<T>(List<T> entitys)
{
//檢查實體集合不能為空
if (entitys == null || entitys.Count < 1)
{
throw new Exception("需轉換的集合為空");
}
//取出第一個實體的所有Propertie
Type entityType = entitys[0].GetType();
PropertyInfo[] entityProperties = entityType.GetProperties();
//生成DataTable的structure
//生產代碼中,應將生成的DataTable結構Cache起來,此處略
DataTable dt = new DataTable();
for (int i = 0; i < entityProperties.Length; i++)
{
//dt.Columns.Add(entityProperties[i].Name, entityProperties[i].PropertyType);
dt.Columns.Add(entityProperties[i].Name);
}
//將所有entity添加到DataTable中
foreach (object entity in entitys)
{
//檢查所有的的實體都為同一類型
if (entity.GetType() != entityType)
{
throw new Exception("要轉換的集合元素類型不一致");
}
object[] entityValues = new object[entityProperties.Length];
for (int i = 0; i < entityProperties.Length; i++)
{
entityValues[i] = entityProperties[i].GetValue(entity, null);
}
dt.Rows.Add(entityValues);
}
return dt;
}