Excel导出
1
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.ComponentModel;
using System.Reflection;
using System.Data;
using Aspose.Cells;
using System.Text.RegularExpressions;
using System.IO;
using System.Web.Script.Serialization;
namespace PublicBase.Common
{
public class CommonFunction
{
///
/// excel导出
///
/// 需要导出的对象集合
/// 导出文件名
/// (List list, string filename, Func func)
where T : class,new()
{
try
{
StringBuilder sb = new StringBuilder();
System.IO.StringWriter tw = new System.IO.StringWriter();
sb.Append("");
sb.Append("");
sb.Append("");
sb.Append("");
sb.Append("
/// 根据Json返回DateTable,JSON数据格式如:
/// {table:[{column1:1,column2:2,column3:3},{column1:1,column2:2,column3:3}]}
///
/// Json字符串
///
/// Json格式转换成键值对，键值对中的Key需要区分大小写
///
/// 需要转换的Json文本数据
/// JsonToDictionary(string JsonData)
{
object Data = null;
Dictionary Dic = new Dictionary();
if (JsonData.StartsWith("["))
{
//如果目标直接就为数组类型，则将会直接输出一个Key为List的List>集合
//使用示例List> ListDic = (List>)Dic["List"];
List> List = new List>();
MatchCollection ListMatch = Regex.Matches(JsonData, @"{[\s\S]+?}");//使用正则表达式匹配出JSON数组
foreach (Match ListItem in ListMatch)
{
List.Add(JsonToDictionary(ListItem.ToString()));//递归调用
}
Data = List;
Dic.Add("List", Data);
}
else
{
MatchCollection Match = Regex.Matches(JsonData, @"""(.+?)"": {0,1}(\[[\s\S]+?\]|null|"".+?""|-{0,1}\d*)");//使用正则表达式匹配出JSON数据中的键与值
foreach (Match item in Match)
{
try
{
if (item.Groups[2].ToString().StartsWith("["))
{
//如果目标是数组，将会输出一个Key为当前Json的List>集合
//使用示例List> ListDic = (List>)Dic["Json中的Key"];
List> List = new List>();
MatchCollection ListMatch = Regex.Matches(item.Groups[2].ToString(), @"{[\s\S]+?}");//使用正则表达式匹配出JSON数组
foreach (Match ListItem in ListMatch)
{
List.Add(JsonToDictionary(ListItem.ToString()));//递归调用
}
Data = List;
}
else if (item.Groups[2].ToString().ToLower() == "null") Data = null;//如果数据为null(字符串类型),直接转换成null
else Data = item.Groups[2].ToString(); //数据为数字、字符串中的一类，直接写入
Dic.Add(item.Groups[1].ToString(), Data);
}
catch { }
}
}
return Dic;
}
///
/// 对象转JSON
///
/// 对象
/// JSON格式的字符串
public static string ObjectToJson(object obj)
{
JavaScriptSerializer jss = new JavaScriptSerializer();
try
{
return jss.Serialize(obj);
}
catch (Exception ex)
{
throw new Exception("JSONHelper.ObjectToJSON(): " + ex.Message);
}
}
}
}
从Execl导入数据到DataTable
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data;
using System.IO;
using System.Collections;
using System.Data.OleDb;
namespace PublicBase.Common
{
public class ImportFromExcel
{
public static DataTable InputFromExcel(string ExcelFilePath, string TableName)
{
if (!File.Exists(ExcelFilePath))
{
throw new Exception("Excel文件不存在！");
}
ArrayList TableList = new ArrayList();
TableList = GetExcelTables(ExcelFilePath);
if (TableName.IndexOf(TableName) < 0)
{
TableName = TableList[0].ToString().Trim();
}
DataTable table = new DataTable();
OleDbConnection dbcon = new OleDbConnection(@"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + ExcelFilePath + ";Extended Properties=Excel 8.0");
OleDbCommand cmd = new OleDbCommand("select * from [" + TableName + "$]", dbcon);
OleDbDataAdapter adapter = new OleDbDataAdapter(cmd);
try
{
if (dbcon.State == ConnectionState.Closed)
{
dbcon.Open();
}
adapter.Fill(table);
}
catch (Exception exp)
{
throw exp;
}
finally
{
if (dbcon.State == ConnectionState.Open)
{
dbcon.Close();
}
}
return table;
}
public static ArrayList GetExcelTables(string ExcelFileName)
{
DataTable dt = new DataTable();
ArrayList TablesList = new ArrayList();
if (File.Exists(ExcelFileName))
{
using (OleDbConnection conn = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Extended Properties=Excel 8.0;Data Source=" + ExcelFileName))
{
try
{
conn.Open();
dt = conn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, new object[] { null, null, null, "TABLE" });
}
catch (Exception exp)
{
throw exp;
}
//获取数据表个数
int tablecount = dt.Rows.Count;
for (int i = 0; i < tablecount; i++)
{
string tablename = dt.Rows[i][2].ToString().Trim().TrimEnd('$');
if (TablesList.IndexOf(tablename) < 0)
{
TablesList.Add(tablename);
}
}
}
}
return TablesList;
}
}
}