1. 程式人生 > >C# DataTable通過反射轉實體類

C# DataTable通過反射轉實體類

hang exc per 區分 collect ram type sco mysq

using System; using System.Collections.Generic; using System.Data; using System.Linq; using System.Text; namespace MySqlHelper { public static class DataTableToModel { /// <summary> /// DataTable通過反射獲取單個像 /// </summary> public static T ToSingleModel<T>(this DataTable data) where T : new() { try { T t = data.GetList<T>(null, true).Single(); return t; } catch (Exception e) { return new T(); } } /// <summary> /// DataTable通過反射獲取單個像 /// <param name="prefix">前綴</param> /// <param name="ignoreCase">是否忽略大小寫,默認不區分</param> /// </summary> public static T ToSingleModel<T>(this DataTable data, string prefix, bool ignoreCase = true) where T : new() { T t = data.GetList<T>(prefix, ignoreCase).Single(); return t; } /// <summary> /// DataTable通過反射獲取多個對像 /// </summary> /// <typeparam name="type"></typeparam> /// <param name="type"></param> /// <returns></returns> public static List<T> ToListModel<T>(this DataTable data) where T : new() { List<T> t = data.GetList<T>(null, true); return t; } /// <summary> /// DataTable通過反射獲取多個對像 /// </summary> /// <param name="prefix">前綴</param> /// <param name="ignoreCase">是否忽略大小寫,默認不區分</param> /// <returns></returns> private static List<T> ToListModel<T>(this DataTable data, string prefix, bool ignoreCase = true) where T : new() { List<T> t = data.GetList<T>(prefix, ignoreCase); return t; } private static List<T> GetList<T>(this DataTable data, string prefix, bool ignoreCase = true) where T : new() { List<T> t = new List<T>(); int columnscount = data.Columns.Count; if (ignoreCase) { for (int i = 0; i < columnscount; i++) data.Columns[i].ColumnName = data.Columns[i].ColumnName.ToUpper(); } try { var properties = new T().GetType().GetProperties(); var rowscount = data.Rows.Count; for (int i = 0; i < rowscount; i++) { var model = new T(); foreach (var p in properties) { var keyName = prefix + p.Name + ""; if (ignoreCase) keyName = keyName.ToUpper(); for (int j = 0; j < columnscount; j++) { if (data.Columns[j].ColumnName == keyName && data.Rows[i][j] != null) { string pval = data.Rows[i][j].ToString(); if (!string.IsNullOrEmpty(pval)) { try { // We need to check whether the property is NULLABLE if (p.PropertyType.IsGenericType && p.PropertyType.GetGenericTypeDefinition() == typeof(Nullable<>)) { p.SetValue(model, Convert.ChangeType(data.Rows[i][j], p.PropertyType.GetGenericArguments()[0]), null); } else { p.SetValue(model, Convert.ChangeType(data.Rows[i][j], p.PropertyType), null); } } catch (Exception x) { throw x; } } break; } } } t.Add(model); } } catch (Exception ex) { throw ex; } return t; } } }

C# DataTable通過反射轉實體類