把IList和泛型数组转换为DataTable

/// <summary>

/// 将集合类转换成DataTable

/// </summary>

/// <param name="list">集合</param>

/// <returns></returns>

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>

/// <returns>数据集(表)</returns>

public static DataTable ToDataTable<T>(IList<T> list)

{

return ToDataTable<T>(list, null);

}

/// <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;

}