init: 导入项目到 meswork Gitea

DataMirrorTools_Simulator/ModelBasic/BasicClass/ExtendMethod.cs

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+using System;
+using System.Collections.Generic;
+using System.Data;
+using System.Reflection;
+
+namespace ModelBasic
+{
+    public static class ExtendMethod
+    {
+        /// <summary>
+        /// 
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="dt"></param>
+        /// <returns></returns>
+        public static List<T> ToDataList<T>(this DataTable dt)
+        {
+            var list = new List<T>();
+            var plist = new List<PropertyInfo>(typeof(T).GetProperties());
+            foreach (DataRow item in dt.Rows)
+            {
+                T s = Activator.CreateInstance<T>();
+                for (int i = 0; i < dt.Columns.Count; i++)
+                {
+                    PropertyInfo info = plist.Find(p => p.Name == dt.Columns[i].ColumnName);
+                    if (info != null)
+                    {
+                        try
+                        {
+                            if (!Convert.IsDBNull(item[i]))
+                            {
+                                object v = null;
+                                if (info.PropertyType.ToString().Contains("System.Nullable"))
+                                {
+                                    v = Convert.ChangeType(item[i], Nullable.GetUnderlyingType(info.PropertyType));
+                                }
+                                else
+                                {
+                                    v = Convert.ChangeType(item[i], info.PropertyType);
+                                }
+                                info.SetValue(s, v, null);
+                            }
+                        }
+                        catch (Exception ex)
+                        {
+                            LogNet.LogisTrac.WriteLog(typeof(ExtendMethod), ex);
+
+                            throw new Exception("字段[" + info.Name + "]转换出错," + ex.Message);
+                        }
+                    }
+                }
+                list.Add(s);
+            }
+            return list;
+        }
+
+        /// <summary>
+        /// DataTable转成Dto
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="dt"></param>
+        /// <returns></returns>
+        public static T ToDataDto<T>(this DataTable dt)
+        {
+            T s = Activator.CreateInstance<T>();
+            if (dt == null || dt.Rows.Count == 0)
+            {
+                return s;
+            }
+            var plist = new List<PropertyInfo>(typeof(T).GetProperties());
+            for (int i = 0; i < dt.Columns.Count; i++)
+            {
+                PropertyInfo info = plist.Find(p => p.Name == dt.Columns[i].ColumnName);
+                if (info != null)
+                {
+                    try
+                    {
+                        if (!Convert.IsDBNull(dt.Rows[0][i]))
+                        {
+                            object v = null;
+                            if (info.PropertyType.ToString().Contains("System.Nullable"))
+                            {
+                                v = Convert.ChangeType(dt.Rows[0][i], Nullable.GetUnderlyingType(info.PropertyType));
+                            }
+                            else
+                            {
+                                v = Convert.ChangeType(dt.Rows[0][i], info.PropertyType);
+                            }
+                            info.SetValue(s, v, null);
+                        }
+                    }
+                    catch (Exception ex)
+                    {
+                        LogNet.LogisTrac.WriteLog(typeof(ExtendMethod), ex);
+
+                        throw new Exception("字段[" + info.Name + "]转换出错," + ex.Message);
+                    }
+                }
+            }
+            return s;
+        }
+
+        /// <summary>
+        /// 将实体集合转换为DataTable
+        /// </summary>
+        /// <typeparam name="T">实体类型</typeparam>
+        /// <param name="entities">实体集合</param>
+        public static DataTable ToDataTable<T>(List<T> entities)
+        {
+            var result = CreateTable<T>();
+            FillData(result, entities);
+            return result;
+        }
+
+        /// <summary>
+        /// 创建表
+        /// </summary>
+        private static DataTable CreateTable<T>()
+        {
+            var result = new DataTable();
+            var type = typeof(T);
+            foreach (var property in type.GetProperties(System.Reflection.BindingFlags.Public | System.Reflection.BindingFlags.Instance))
+            {
+                var propertyType = property.PropertyType;
+                if ((propertyType.IsGenericType) && (propertyType.GetGenericTypeDefinition() == typeof(Nullable<>)))
+                    propertyType = propertyType.GetGenericArguments()[0];
+                result.Columns.Add(property.Name, propertyType);
+            }
+            return result;
+        }
+
+        /// <summary>
+        /// 填充数据
+        /// </summary>
+        private static void FillData<T>(DataTable dt, IEnumerable<T> entities)
+        {
+            foreach (var entity in entities)
+            {
+                dt.Rows.Add(CreateRow(dt, entity));
+            }
+        }
+
+        /// <summary>
+        /// 创建行
+        /// </summary>
+        private static DataRow CreateRow<T>(DataTable dt, T entity)
+        {
+            DataRow row = dt.NewRow();
+            var type = typeof(T);
+            foreach (var property in type.GetProperties(System.Reflection.BindingFlags.Public | System.Reflection.BindingFlags.Instance))
+            {
+                row[property.Name] = property.GetValue(entity) ?? DBNull.Value;
+            }
+            return row;
+        }
+    }
+}