public class WebUtil
{
/// <summary>
/// 转换IList<T>为DataTable/// </summary> /// <typeparam name="T">泛型类型</typeparam> /// <param name="list">泛型List集合</param> /// <returns>Datatable 对象</returns>public static DataTable ConvertToDataTable<T>(IList<T> list)
{
DataTable table = CreateTable<T>();
Type entityType = typeof(T);PropertyDescriptorCollection properties = TypeDescriptor.GetProperties(entityType);
foreach (T item in list)
{
DataRow row = table.NewRow();
foreach (PropertyDescriptor prop in properties)
{
row[prop.Name] = prop.GetValue(item);
}
table.Rows.Add(row);
}
return table;
}
public static DataTable CreateTable<T>()
{
Type entityType = typeof(T);DataTable table = new DataTable(entityType.Name);PropertyDescriptorCollection properties = TypeDescriptor.GetProperties(entityType);
foreach (PropertyDescriptor prop in properties)
{
//解决 DataSet不支持System.Nullable<>”的异常Type colType = prop.PropertyType;if ((colType.IsGenericType) && (colType.GetGenericTypeDefinition() == typeof(Nullable<>)))
{
colType = colType.GetGenericArguments()[0];
}
table.Columns.Add(prop.Name, colType);
}
return table;
}
}
//在调用上面的那个类的方法时出现 “DataSet不支持System.Nullable<>”的异常。下面是调用的方式。
IList<PersonInfo> list = GetPersonInfoList();//这是我的列表获取方法。。这里没问题的！！有数据得到！
var dt = WebUtil.ConvertTo<PersonInfo>(list);