【.net/.net core】LIST与DATASET之间转换

数据转换利器：List转DataSet与DataTable操作详解

原创已于 2024-03-29 15:09:22 修改 · 2.3k 阅读

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文章标签：

#list #linq #.netcore

于 2022-02-16 18:32:13 首次发布

本文介绍了如何将IList<T>转换为DataSet，并演示了DataTable到List<T>的逆操作。通过实例展示了类型安全的集合转换，适合数据处理和迁移场景。

//List转DataSet
public static DataSet ConvertToDataSet<T>(IList<T> list)
        {
            if (list == null || list.Count <= 0)
            {
                return null;
            }
            DataSet ds = new DataSet();
            DataTable dt = new DataTable(typeof(T).Name);
            DataColumn column;
            DataRow row;
            System.Reflection.PropertyInfo[] myPropertyInfo = typeof(T).GetProperties(System.Reflection.BindingFlags.Public | System.Reflection.BindingFlags.Instance);
            foreach (T t in list)
            {
                if (t == null)
                {
                    continue;
                }
                row = dt.NewRow();
                for (int i = 0, j = myPropertyInfo.Length; i < j; i++)
                {
                    System.Reflection.PropertyInfo pi = myPropertyInfo[i];
                    string name = pi.Name;
                    if (dt.Columns[name] == null)
                    {
                        column = new DataColumn(name, pi.PropertyType);
                        dt.Columns.Add(column);
                    }
                    row[name] = pi.GetValue(t, null);
                }
                dt.Rows.Add(row);
            }
            ds.Tables.Add(dt);
            return ds;
        }

//DataTable转List
public static List<T> GetList<T>(DataTable table)
        {
            List<T> list = new List<T>();
            T t = default(T);
            PropertyInfo[] propertypes = null;
            string tempName = string.Empty;
            foreach (DataRow row in table.Rows)
            {
                t = Activator.CreateInstance<T>();
                propertypes = t.GetType().GetProperties();
                foreach (PropertyInfo pro in propertypes)
                {
                    tempName = pro.Name;
                    if (table.Columns.Contains(tempName))
                    {
                        object value = row[tempName];
                        if (!value.ToString().Equals(""))
                        {
                            pro.SetValue(t, value, null);
                        }
                    }
                }
                list.Add(t);
            }
            return list.Count == 0 ? null : list;
        }