1.功能类
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;
namespace Infrastructure
{
public static class FileExtensions
{
public static bool EnsureDirectory(string path)
{
if (!Directory.Exists(path))
{
Directory.CreateDirectory(path);
}
return true;
}
public static bool CreateFile(string folder, string fileName, string fileExtension)
{
EnsureDirectory(folder);
string filePath = Path.Combine(folder, string.Format("{0}.{1}",fileName, fileExtension));
using (FileStream fileStream = new FileStream(filePath, FileMode.Create))
{}
return true;
}
public static bool SaveToCsv<T>(IEnumerable<T> array, string filePath)
{
bool flag = true;
try
{
StringBuilder stringBuilderColumn = new StringBuilder();
StringBuilder stringBuilderValue = new StringBuilder();
Type type = typeof (T);
object obj = Activator.CreateInstance(type);
PropertyInfo[] props = type.GetProperties(BindingFlags.Public|BindingFlags.Instance);
props.ToList().ForEach(x => stringBuilderColumn.Append(string.Format("{0},",x.Name)));
stringBuilderColumn.Remove(stringBuilderColumn.Length - 1, 1);
using (StreamWriter streamWriter = new StreamWriter(filePath))
{
streamWriter.WriteLine(stringBuilderColumn);
array.ToList().ForEach(x =>
{
stringBuilderValue.Remove(0, stringBuilderValue.Length);
foreach (PropertyDescriptor pd in TypeDescriptor.GetProperties(typeof (T)))
{
stringBuilderValue.Append(string.Format("{0},",pd.GetValue(x) == null ? pd.GetValue(x) : pd.GetValue(x).ToString().Replace(‘,‘, ‘,‘)));
}
stringBuilderValue.Remove(stringBuilderValue.Length - 1, 1);
streamWriter.WriteLine(stringBuilderValue);
});
}
}
catch
{
flag = false;
}
return flag;
}
}
}
2.调用方式
List<T> items = new List<T>();
xxx //为items集合赋值
string filePath = xxx;//文件存储路径
FileExtensions.SaveToCsv(items,filePath);//调用方法
原文地址:https://www.cnblogs.com/jeff151013/p/11739335.html