本文实例讲述了C#实现的Excel文件操作类。分享给大家供大家参考，具体如下：
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using System;
using System.Data;
using System.Data.OleDb;
using System.Text;
using System.IO;
namespace Hxh.API
{
/// <summary>
/// ExcelOpration 的摘要说明。
/// </summary>
public class ExcelOpration
{
OleDbConnection Conn;
string connString ;
string FileName;
public ExcelOpration()
{
//
// TODO: 在此处添加构造函数逻辑
//
}
public ExcelOpration(string _FileName)
{
//
// TODO: 在此处添加构造函数逻辑
//
FileName = _FileName;
}
/// <summary>
/// 打开连接
/// </summary>
private void Open()
{
if(Conn==null)
{
//在此处设置访问的数据库文件
connString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + FileName +";Extended Properties=Excel 8.0;";
Conn=new OleDbConnection(connString);
Conn.Open();
}
else if(Conn.State==System.Data.ConnectionState.Closed)
Conn.Open();
}
/// <summary>
/// 关闭连接
/// </summary>
public void Close()
{
if (Conn != null)
Conn.Close();
}
/// <summary>
/// 导入数据到Excel
/// </summary>
/// <param name="OutTable"></param>
public void ImportData(DataTable OutTable)
{
CreateExcel(OutTable);
InsertData(OutTable);
}
/// <summary>
/// 创建Excel文件和表头
/// </summary>
private void CreateExcel(DataTable OutTable)
{
StringBuilder sb = new StringBuilder();
if(File.Exists(FileName))
{
File.Delete(FileName);
}
sb.Append("create table Sheet1(");
foreach(DataColumn col in OutTable.Columns)
{
sb.Append(col.ColumnName+" varchar,");
}
sb.Remove(sb.Length-1,1);
sb.Append(")");
Open();
OleDbCommand OleCmd = new OleDbCommand();
OleCmd.Connection = Conn;
OleCmd.CommandText = sb.ToString();
OleCmd.ExecuteNonQuery();
Close();
}
/// <summary>
/// 插入数据
/// </summary>
private void InsertData(DataTable OutTable)
{
OleDbCommand OleCmd = new OleDbCommand();
OleDbParameter[] parm=new OleDbParameter[OutTable.Columns.Count];
StringBuilder sb = new StringBuilder();
sb.Append("insert into Sheet1 values(");
for(int i=0;i<OutTable.Columns.Count;i++)
{
parm=new OleDbParameter("@P"+OutTable.Columns.ColumnName,OleDbType.VarChar);
sb.Append("@P"+OutTable.Columns.ColumnName+",");
OleCmd.Parameters.Add(parm);
}
sb.Remove(sb.Length-1,1);
sb.Append(")");
Open();
OleCmd.Connection = Conn;
OleCmd.CommandText = sb.ToString();
foreach(DataRow row in OutTable.Rows)
{
for(int i=0;i<OutTable.Columns.Count;i++)
{
parm.Value = row[OutTable.Columns.ColumnName].ToString().Trim();
}
OleCmd.ExecuteNonQuery();
}
Close();
}
/// <summary>
/// 从Excel输出数据到数据集
/// </summary>
/// <returns></returns>
public DataSet OutPortData()
{
DataSet ds = new DataSet();
Open();
OleDbDataAdapter myAdapter = new OleDbDataAdapter("select * from [Sheet1$]", Conn);
myAdapter.Fill(ds,"Input");
Close();
return ds;
}
}
}
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希望本文所述对大家C#程序设计有所帮助。