IList及泛型集合类转换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  ConvertX.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;
        }

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