1

duhe

2024-11-05 9a75f7db9431032c0f1ecc64be4966a25c74bafa

 WebAPI/Controllers/SCGL/Èռƻ®¹ÜÀí/DataHelper.cs

@@ -1,5 +1,8 @@
using System;
using Newtonsoft.Json;
using System;
using System.Collections;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Linq;
using System.Reflection;
@@ -19,7 +22,7 @@
                List<T> list = new List<T>();
                if (ds.Tables[0].Rows.Count > 0)
                {
                    foreach (DataRow row in ds.Tables[0].Rows) 
                    foreach (DataRow row in ds.Tables[0].Rows)
                    {
                        list.Add(row.Put(new T()));
                    }
@@ -167,5 +170,77 @@
            }
            return $"update {table} set {strSet} where 1=1 {condition}";
        }




        /// <summary>
        /// å°†List转换成DataTable
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="data"></param>
        /// <returns></returns>
        public static DataTable ToDataTable<T>(this IList<T> data)
        {
            PropertyDescriptorCollection properties = TypeDescriptor.GetProperties(typeof(T));
            DataTable dt = new DataTable();
            for (int i = 0; i < properties.Count; i++)
            {
                PropertyDescriptor property = properties[i];
                dt.Columns.Add(property.Name, property.PropertyType);
            }
            object[] values = new object[properties.Count];
            foreach (T item in data)
            {
                for (int i = 0; i < values.Length; i++)
                {
                    values[i] = properties[i].GetValue(item);
                }
                dt.Rows.Add(values);
            }
            return dt;
        }


        /// <summary>
        /// å°†List转换为DataTable
        /// </summary>
        /// <param name="list">请求数据</param>
        /// <returns></returns>
        public static DataTable ListToDataTable<T>(List<T> list)
        {
            //创建一个名为"tableName"的空表
            DataTable dt = new DataTable("tableName");

            //创建传入对象名称的列
            foreach (var item in list.FirstOrDefault().GetType().GetProperties())
            {
                dt.Columns.Add(item.Name);
            }
            //循环存储
            foreach (var item in list)
            {
                //新加行
                DataRow value = dt.NewRow();
                //根据DataTable中的值，进行对应的赋值
                foreach (DataColumn dtColumn in dt.Columns)
                {
                    int i = dt.Columns.IndexOf(dtColumn);
                    //基元元素，直接复制，对象类型等，进行序列化
                    if (value.GetType().IsPrimitive)
                    {
                        value[i] = item.GetType().GetProperty(dtColumn.ColumnName).GetValue(item);
                    }
                    else
                    {
                        value[i] = JsonConvert.SerializeObject(item.GetType().GetProperty(dtColumn.ColumnName).GetValue(item));
                    }
                }
                dt.Rows.Add(value);
            }
            return dt;
        }

    }

}