private static void FireAction <T>(DBMapOption option, object dataRow, T contextObject)
{
if (option != null && option.RowFillAction != null && contextObject != null)
{
option.RowFillAction(contextObject, dataRow, option.RowFillActionParam);
}
}
/// <summary>
/// 生成实体集合
/// </summary>
/// <typeparam name="T">集合元素对象类型</typeparam>
/// <param name="dt">数据集合</param>
/// <param name="option">映射选项</param>
/// <returns>返回实体集合</returns>
public static IEnumerable <T> ToList <T>(this DataTable dt, DBMapOption option = null)
where T : new()
{
if (dt != null && dt.Rows.Count > 0)
{
foreach (DataRow row in dt.Rows)
{
yield return(row.Fill <T>(option));
}
}
}
/// <summary>
/// 生成实体集合
/// </summary>
/// <typeparam name="T">集合元素对象类型</typeparam>
/// <param name="rows">数据集合</param>
/// <param name="option">映射选项</param>
/// <returns>返回实体集合</returns>
public static IEnumerable <T> ToList <T>(this DataRowCollection rows, DBMapOption option = null)
where T : new()
{
if (rows != null && rows.Count > 0)
{
foreach (DataRow row in rows)
{
yield return(row.Fill <T>(option));
}
}
}
/// <summary>
/// 生成实体集合
/// </summary>
/// <typeparam name="T">集合元素对象类型</typeparam>
/// <param name="reader">数据集合</param>
/// <param name="option">映射选项</param>
/// <returns>返回实体集合</returns>
public static IEnumerable <T> ToList <T>(this IDataReader reader, DBMapOption option = null)
where T : new()
{
if (reader != null)
{
while (reader.Read())
{
yield return(reader.Fill <T>(option));
}
reader.Close();
}
}
private static bool IsIgnoreField(string name, DBMapOption option)
{
if (option == null || option.IgnoreFields == null || option.IgnoreFields.Count() == 0)//不忽略任何字段
{
return(false);
}
foreach (string item in option.IgnoreFields)
{
if (item.Trim() == name.Trim())
{
return(true);//忽略
}
}
return(false);
}
/// <summary>
/// 生成实体
/// </summary>
/// <typeparam name="T">要填充的实体类型</typeparam>
/// <param name="row">数据行</param>
/// <param name="option">映射选项</param>
/// <returns>返回实体</returns>
public static T Fill <T>(this DataRow row, DBMapOption option = null)
where T : new()
{
if (row != null)
{
PropertyInfo[] ps = typeof(T).GetProperties();
if (ps != null && ps.Length > 0)
{
T re = new T();
foreach (PropertyInfo p in ps)
{
if (p != null && p.CanWrite && !IsIgnoreField(p.Name, option))
{
Type targetPType = null;
if (p.PropertyType.IsGenericType)
{
targetPType = p.PropertyType.GetGenericArguments()[0];
}
else if (typeof(IConvertible).IsAssignableFrom(p.PropertyType))
{
targetPType = p.PropertyType;
}
if (targetPType != null)
{
p.SetValue(re, TryConvertType(ReadValue(row, MapFieldName(p.Name, (option == null ? null : option.FiledNameMaps))), targetPType, p.PropertyType.IsGenericType));
}
}
}
FireAction <T>(option, row, re);
return(re);
}
}
return(default(T));
}
