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在开发中，把查询结果以DataTable返回很方便，但是在检索数据时又很麻烦，没有list<T>检索方便。但是数据以ILIST形式返回，就为我们在.NET中使用传统的数据绑定造成了不便。下面介绍datatable和list的相互转换
1.datatable转换为list
public 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; }
2.list转换为datatable
public 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; }
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原文地址：http://www.cnblogs.com/chuangege/p/5905944.html
