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【CSharp】集合、DataTable互转

作者:kunkun0921 / 发布于2015/1/26/ 568


	/// <summary>
	 /// 将集合类转换成DataTable
	 /// </summary>
	 /// <param name="list">集合</param>
	 public static DataTable ToDataTable(IList list)
	 {
	 DataTable result = new DataTable();
	 if (list.Count > 0)
	 {
	 PropertyInfo[] propertys = list[0].GetType().GetProperties();
	 foreach (PropertyInfo pi in propertys)
	 {
	 result.Columns.Add(pi.Name, pi.PropertyType);
	 }

	 for (int i = 0; i < list.Count; i++)
	 {
	 ArrayList tempList = new ArrayList();
	 foreach (PropertyInfo pi in propertys)
	 {
	 object obj = pi.GetValue(list[i], null);
	 tempList.Add(obj);
	 }
	 object[] array = tempList.ToArray();
	 result.LoadDataRow(array, true);
	 }
	 }
	 return result;
	 }

	 /// <summary>
	 /// 将泛型集合类转换成DataTable
	 /// </summary>
	 /// <typeparam name="T">集合项类型</typeparam>
	 /// <param name="list">集合</param>
	 /// <param name="propertyName">需要返回的列的列名</param>
	 /// <returns>数据集(表)</returns>
	 public static DataTable ToDataTable<T>(IList<T> list, params string[] propertyName)
	 {
	 List<string> propertyNameList = new List<string>();
	 if (propertyName != null) propertyNameList.AddRange(propertyName);

	 DataTable result = new DataTable();
	 if (list.Count > 0)
	 {
	 PropertyInfo[] propertys = list[0].GetType().GetProperties();
	 foreach (PropertyInfo pi in propertys)
	 {
	 if (propertyNameList.Count == 0)
	 {
	 result.Columns.Add(pi.Name, pi.PropertyType);
	 }
	 else
	 {
	 if (propertyNameList.Contains(pi.Name)) result.Columns.Add(pi.Name, pi.PropertyType);
	 }
	 }

	 for (int i = 0; i < list.Count; i++)
	 {
	 ArrayList tempList = new ArrayList();
	 foreach (PropertyInfo pi in propertys)
	 {
	 if (propertyNameList.Count == 0)
	 {
	 object obj = pi.GetValue(list[i], null);
	 tempList.Add(obj);
	 }
	 else
	 {
	 if (propertyNameList.Contains(pi.Name))
	 {
	 object obj = pi.GetValue(list[i], null);
	 tempList.Add(obj);
	 }
	 }
	 }
	 object[] array = tempList.ToArray();
	 result.LoadDataRow(array, true);
	 }
	 }
	 return result;
	 }

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　集合　　 DataTable　

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