导出Excel文件

/// <summary>
/// 类说明：Assistant

/// 更新网站：[url=http://www.sufeinet.com/thread-655-1-1.html]http://www.sufeinet.com/thread-655-1-1.html[/url]
/// </summary>
using System;
using System.IO;
using System.Data;
using System.Collections;
using System.Data.OleDb;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
 
namespace DotNet.Utilities
{
    /// <summary>
    /// Excel操作类
    /// </summary>
    /// Microsoft Excel 11.0 Object Library
    public class ExcelHelper
    {
        #region 数据导出至Excel文件
        /// </summary>
        /// 导出Excel文件，自动返回可下载的文件流
        /// </summary>
        public static void DataTable1Excel(System.Data.DataTable dtData)
        {
            GridView gvExport = null;
            HttpContext curContext = HttpContext.Current;
            StringWriter strWriter = null;
            HtmlTextWriter htmlWriter = null;
            if (dtData != null)
            {
                curContext.Response.ContentType = "application/vnd.ms-excel";
                curContext.Response.ContentEncoding = System.Text.Encoding.GetEncoding("gb2312");
                curContext.Response.Charset = "utf-8";
                strWriter = new StringWriter();
                htmlWriter = new HtmlTextWriter(strWriter);
                gvExport = new GridView();
                gvExport.DataSource = dtData.DefaultView;
                gvExport.AllowPaging = false;
                gvExport.DataBind();
                gvExport.RenderControl(htmlWriter);
                curContext.Response.Write("<meta http-equiv=\"Content-Type\" content=\"text/html;charset=gb2312\"/>" + strWriter.ToString());
                curContext.Response.End();
            }
        }
 
        /// <summary>
        /// 导出Excel文件，转换为可读模式
        /// </summary>
        public static void DataTable2Excel(System.Data.DataTable dtData)
        {
            DataGrid dgExport = null;
            HttpContext curContext = HttpContext.Current;
            StringWriter strWriter = null;
            HtmlTextWriter htmlWriter = null;
 
            if (dtData != null)
            {
                curContext.Response.ContentType = "application/vnd.ms-excel";
                curContext.Response.ContentEncoding = System.Text.Encoding.UTF8;
                curContext.Response.Charset = "";
                strWriter = new StringWriter();
                htmlWriter = new HtmlTextWriter(strWriter);
                dgExport = new DataGrid();
                dgExport.DataSource = dtData.DefaultView;
                dgExport.AllowPaging = false;
                dgExport.DataBind();
                dgExport.RenderControl(htmlWriter);
                curContext.Response.Write(strWriter.ToString());
                curContext.Response.End();
            }
        }
 
        /// <summary>
        /// 导出Excel文件，并自定义文件名
        /// </summary>
        public static void DataTable3Excel(System.Data.DataTable dtData, String FileName)
        {
            GridView dgExport = null;
            HttpContext curContext = HttpContext.Current;
            StringWriter strWriter = null;
            HtmlTextWriter htmlWriter = null;
 
            if (dtData != null)
            {
                HttpUtility.UrlEncode(FileName, System.Text.Encoding.UTF8);
                curContext.Response.AddHeader("content-disposition", "attachment;filename=" + HttpUtility.UrlEncode(FileName, System.Text.Encoding.UTF8) + ".xls");
                curContext.Response.ContentType = "application nd.ms-excel";
                curContext.Response.ContentEncoding = System.Text.Encoding.UTF8;
                curContext.Response.Charset = "GB2312";
                strWriter = new StringWriter();
                htmlWriter = new HtmlTextWriter(strWriter);
                dgExport = new GridView();
                dgExport.DataSource = dtData.DefaultView;
                dgExport.AllowPaging = false;
                dgExport.DataBind();
                dgExport.RenderControl(htmlWriter);
                curContext.Response.Write(strWriter.ToString());
                curContext.Response.End();
            }
        }
 
        /// <summary>
        /// 将数据导出至Excel文件
        /// </summary>
        /// <param name="Table">DataTable对象</param>
        /// <param name="ExcelFilePath">Excel文件路径</param>
        public static bool OutputToExcel(DataTable Table, string ExcelFilePath)
        {
            if (File.Exists(ExcelFilePath))
            {
                throw new Exception("该文件已经存在！");
            }
 
            if ((Table.TableName.Trim().Length == 0) || (Table.TableName.ToLower() == "table"))
            {
                Table.TableName = "Sheet1";
            }
 
            //数据表的列数
            int ColCount = Table.Columns.Count;
 
            //用于记数，实例化参数时的序号
            int i = 0;
 
            //创建参数
            OleDbParameter[] para = new OleDbParameter[ColCount];
 
            //创建表结构的SQL语句
            string TableStructStr = @"Create Table " + Table.TableName + "(";
 
            //连接字符串
            string connString = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + ExcelFilePath + ";Extended Properties=Excel 8.0;";
            OleDbConnection objConn = new OleDbConnection(connString);
 
            //创建表结构
            OleDbCommand objCmd = new OleDbCommand();
 
            //数据类型集合
            ArrayList DataTypeList = new ArrayList();
            DataTypeList.Add("System.Decimal");
            DataTypeList.Add("System.Double");
            DataTypeList.Add("System.Int16");
            DataTypeList.Add("System.Int32");
            DataTypeList.Add("System.Int64");
            DataTypeList.Add("System.Single");
 
            //遍历数据表的所有列，用于创建表结构
            foreach (DataColumn col in Table.Columns)
            {
                //如果列属于数字列，则设置该列的数据类型为double
                if (DataTypeList.IndexOf(col.DataType.ToString()) >= 0)
                {
                    para[i] = new OleDbParameter("@" + col.ColumnName, OleDbType.Double);
                    objCmd.Parameters.Add(para[i]);
 
                    //如果是最后一列
                    if (i + 1 == ColCount)
                    {
                        TableStructStr += col.ColumnName + " double)";
                    }
                    else
                    {
                        TableStructStr += col.ColumnName + " double,";
                    }
                }
                else
                {
                    para[i] = new OleDbParameter("@" + col.ColumnName, OleDbType.VarChar);
                    objCmd.Parameters.Add(para[i]);
 
                    //如果是最后一列
                    if (i + 1 == ColCount)
                    {
                        TableStructStr += col.ColumnName + " varchar)";
                    }
                    else
                    {
                        TableStructStr += col.ColumnName + " varchar,";
                    }
                }
                i++;
            }
 
            //创建Excel文件及文件结构
            try
            {
                objCmd.Connection = objConn;
                objCmd.CommandText = TableStructStr;
 
                if (objConn.State == ConnectionState.Closed)
                {
                    objConn.Open();
                }
                objCmd.ExecuteNonQuery();
            }
            catch (Exception exp)
            {
                throw exp;
            }
 
            //插入记录的SQL语句
            string InsertSql_1 = "Insert into " + Table.TableName + " (";
            string InsertSql_2 = " Values (";
            string InsertSql = "";
 
            //遍历所有列，用于插入记录，在此创建插入记录的SQL语句
            for (int colID = 0; colID < ColCount; colID++)
            {
                if (colID + 1 == ColCount)  //最后一列
                {
                    InsertSql_1 += Table.Columns[colID].ColumnName + ")";
                    InsertSql_2 += "@" + Table.Columns[colID].ColumnName + ")";
                }
                else
                {
                    InsertSql_1 += Table.Columns[colID].ColumnName + ",";
                    InsertSql_2 += "@" + Table.Columns[colID].ColumnName + ",";
                }
            }
 
            InsertSql = InsertSql_1 + InsertSql_2;
 
            //遍历数据表的所有数据行
            for (int rowID = 0; rowID < Table.Rows.Count; rowID++)
            {
                for (int colID = 0; colID < ColCount; colID++)
                {
                    if (para[colID].DbType == DbType.Double && Table.Rows[rowID][colID].ToString().Trim() == "")
                    {
                        para[colID].Value = 0;
                    }
                    else
                    {
                        para[colID].Value = Table.Rows[rowID][colID].ToString().Trim();
                    }
                }
                try
                {
                    objCmd.CommandText = InsertSql;
                    objCmd.ExecuteNonQuery();
                }
                catch (Exception exp)
                {
                    string str = exp.Message;
                }
            }
            try
            {
                if (objConn.State == ConnectionState.Open)
                {
                    objConn.Close();
                }
            }
            catch (Exception exp)
            {
                throw exp;
            }
            return true;
        }
 
        /// <summary>
        /// 将数据导出至Excel文件
        /// </summary>
        /// <param name="Table">DataTable对象</param>
        /// <param name="Columns">要导出的数据列集合</param>
        /// <param name="ExcelFilePath">Excel文件路径</param>
        public static bool OutputToExcel(DataTable Table, ArrayList Columns, string ExcelFilePath)
        {
            if (File.Exists(ExcelFilePath))
            {
                throw new Exception("该文件已经存在！");
            }
 
            //如果数据列数大于表的列数，取数据表的所有列
            if (Columns.Count > Table.Columns.Count)
            {
                for (int s = Table.Columns.Count + 1; s <= Columns.Count; s++)
                {
                    Columns.RemoveAt(s);   //移除数据表列数后的所有列
                }
            }
 
            //遍历所有的数据列，如果有数据列的数据类型不是 DataColumn，则将它移除
            DataColumn column = new DataColumn();
            for (int j = 0; j < Columns.Count; j++)
            {
                try
                {
                    column = (DataColumn)Columns[j];
                }
                catch (Exception)
                {
                    Columns.RemoveAt(j);
                }
            }
            if ((Table.TableName.Trim().Length == 0) || (Table.TableName.ToLower() == "table"))
            {
                Table.TableName = "Sheet1";
            }
 
            //数据表的列数
            int ColCount = Columns.Count;
 
            //创建参数
            OleDbParameter[] para = new OleDbParameter[ColCount];
 
            //创建表结构的SQL语句
            string TableStructStr = @"Create Table " + Table.TableName + "(";
 
            //连接字符串
            string connString = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + ExcelFilePath + ";Extended Properties=Excel 8.0;";
            OleDbConnection objConn = new OleDbConnection(connString);
 
            //创建表结构
            OleDbCommand objCmd = new OleDbCommand();
 
            //数据类型集合
            ArrayList DataTypeList = new ArrayList();
            DataTypeList.Add("System.Decimal");
            DataTypeList.Add("System.Double");
            DataTypeList.Add("System.Int16");
            DataTypeList.Add("System.Int32");
            DataTypeList.Add("System.Int64");
            DataTypeList.Add("System.Single");
 
            DataColumn col = new DataColumn();
 
            //遍历数据表的所有列，用于创建表结构
            for (int k = 0; k < ColCount; k++)
            {
                col = (DataColumn)Columns[k];
 
                //列的数据类型是数字型
                if (DataTypeList.IndexOf(col.DataType.ToString().Trim()) >= 0)
                {
                    para[k] = new OleDbParameter("@" + col.Caption.Trim(), OleDbType.Double);
                    objCmd.Parameters.Add(para[k]);
 
                    //如果是最后一列
                    if (k + 1 == ColCount)
                    {
                        TableStructStr += col.Caption.Trim() + " Double)";
                    }
                    else
                    {
                        TableStructStr += col.Caption.Trim() + " Double,";
                    }
                }
                else
                {
                    para[k] = new OleDbParameter("@" + col.Caption.Trim(), OleDbType.VarChar);
                    objCmd.Parameters.Add(para[k]);
 
                    //如果是最后一列
                    if (k + 1 == ColCount)
                    {
                        TableStructStr += col.Caption.Trim() + " VarChar)";
                    }
                    else
                    {
                        TableStructStr += col.Caption.Trim() + " VarChar,";
                    }
                }
            }
 
            //创建Excel文件及文件结构
            try
            {
                objCmd.Connection = objConn;
                objCmd.CommandText = TableStructStr;
 
                if (objConn.State == ConnectionState.Closed)
                {
                    objConn.Open();
                }
                objCmd.ExecuteNonQuery();
            }
            catch (Exception exp)
            {
                throw exp;
            }
 
            //插入记录的SQL语句
            string InsertSql_1 = "Insert into " + Table.TableName + " (";
            string InsertSql_2 = " Values (";
            string InsertSql = "";
 
            //遍历所有列，用于插入记录，在此创建插入记录的SQL语句
            for (int colID = 0; colID < ColCount; colID++)
            {
                if (colID + 1 == ColCount)  //最后一列
                {
                    InsertSql_1 += Columns[colID].ToString().Trim() + ")";
                    InsertSql_2 += "@" + Columns[colID].ToString().Trim() + ")";
                }
                else
                {
                    InsertSql_1 += Columns[colID].ToString().Trim() + ",";
                    InsertSql_2 += "@" + Columns[colID].ToString().Trim() + ",";
                }
            }
 
            InsertSql = InsertSql_1 + InsertSql_2;
 
            //遍历数据表的所有数据行
            DataColumn DataCol = new DataColumn();
            for (int rowID = 0; rowID < Table.Rows.Count; rowID++)
            {
                for (int colID = 0; colID < ColCount; colID++)
                {
                    //因为列不连续，所以在取得单元格时不能用行列编号，列需得用列的名称
                    DataCol = (DataColumn)Columns[colID];
                    if (para[colID].DbType == DbType.Double && Table.Rows[rowID][DataCol.Caption].ToString().Trim() == "")
                    {
                        para[colID].Value = 0;
                    }
                    else
                    {
                        para[colID].Value = Table.Rows[rowID][DataCol.Caption].ToString().Trim();
                    }
                }
                try
                {
                    objCmd.CommandText = InsertSql;
                    objCmd.ExecuteNonQuery();
                }
                catch (Exception exp)
                {
                    string str = exp.Message;
                }
            }
            try
            {
                if (objConn.State == ConnectionState.Open)
                {
                    objConn.Close();
                }
            }
            catch (Exception exp)
            {
                throw exp;
            }
            return true;
        }
        #endregion
 
        /// <summary>
        /// 获取Excel文件数据表列表
        /// </summary>
        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;
        }
 
        /// <summary>
        /// 将Excel文件导出至DataTable(第一行作为表头)
        /// </summary>
        /// <param name="ExcelFilePath">Excel文件路径</param>
        /// <param name="TableName">数据表名，如果数据表名错误，默认为第一个数据表名</param>
        public static DataTable InputFromExcel(string ExcelFilePath, string TableName)
        {
            if (!File.Exists(ExcelFilePath))
            {
                throw new Exception("Excel文件不存在！");
            }
 
            //如果数据表名不存在，则数据表名为Excel文件的第一个数据表
            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;
        }
 
        /// <summary>
        /// 获取Excel文件指定数据表的数据列表
        /// </summary>
        /// <param name="ExcelFileName">Excel文件名</param>
        /// <param name="TableName">数据表名</param>
        public static ArrayList GetExcelTableColumns(string ExcelFileName, string TableName)
        {
            DataTable dt = new DataTable();
            ArrayList ColsList = 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))
                {
                    conn.Open();
                    dt = conn.GetOleDbSchemaTable(OleDbSchemaGuid.Columns, new object[] { null, null, TableName, null });
 
                    //获取列个数
                    int colcount = dt.Rows.Count;
                    for (int i = 0; i < colcount; i++)
                    {
                        string colname = dt.Rows[i]["Column_Name"].ToString().Trim();
                        ColsList.Add(colname);
                    }
                }
            }
            return ColsList;
        }
    }
}

导出Excel文件的更多相关文章

ExtJS Grid导出excel文件
ExtJS Grid导出excel文件, 需下载POI:链接:http://pan.baidu.com/s/1i3lkPhF 密码:rqbg 1.将Grid表格数据连同表格列名传到后台 2.后台导出e ...
PHP从数据库导出EXCEL文件
参考博客链接:http://www.cnblogs.com/huangcong/p/3687665.html 我的程序代码原生导出Excel文件 <?phpheader('Content-ty ...
jxl导出Excel文件
一.java项目实现读取Excel文件和导出Excel文件实现读取和导出Excel文件的代码: package servlet; import java.io.FileInputStream; im ...
PHP导出excel文件
现在教教你如何导入excel文件: 在我的文件储存里面有一个com文件夹的,将其解压放在ThinkPHP/Library/文件夹里面,然后就是写控制器啦!去调用这个插件: <?php names ...
【转】 (C#)利用Aspose.Cells组件导入导出excel文件
Aspose.Cells组件可以不依赖excel来导入导出excel文件: 导入: public static System.Data.DataTable ReadExcel(String strFi ...
PHPExcel导出excel文件
今天园子刚开,先来个货顶下,后续园丁qing我会再慢慢种园子的,希望大家多来园子逛逛. PHPExcel导出excel文件,先说下重要的参数要记住的东西 impUser() 导入方法 exportEx ...
关于asp.net C# 导出Excel文件打开Excel文件格式与扩展名指定格式不一致的解决办法
-----转载:http://blog.csdn.net/sgear/article/details/7663502 关于asp.net C# 导出Excel文件打开Excel文件格式与扩展名指定格 ...
MSSQL2005 导出excel文件
Title:MSSQL2005 导出excel文件 --2011-01-16 16:01 EXEC master..xp_cmdshell 'bcp "select * from 数据库名 ...
asp.net 导出excel文件
之前做过winfrom程序的导出excel文件的功能,感觉非常简单.现在试着做asp.net中导出excel的功能,之前用的是Microsoft.Office.Interop.Excel这个对象来实现 ...

随机推荐

css布局模型之绝对定位与相对定位
1. 绝对定位,absolute 如果想为元素设置层模型中的绝对定位,需要设置position:absolute(表示绝对定位),这条语句的作用将元素从文档流中拖出来,然后使用left.right.t ...
[转]Creating Unit Tests for ASP.NET MVC Applications (C#)
本文转自:http://www.asp.net/mvc/tutorials/older-versions/unit-testing/creating-unit-tests-for-asp-net-mv ...
js内置对象处理-打印学生成绩单
效果图: 任务: 1.通过js的内置对象得到当前日期 var date=new Date(); var year=date.toString().slice(11,15); document.writ ...
SQL SERVER 锁定的实例
---实例DB:AdventureWorks2014 --- 创建view DBLocks USE [AdventureWorks2014] GO /****** Object: View [dbo] ...
复制pdf文字出来是乱码的一种可能的解决方案
最近在处理一个pdf文件,是一个地图文件,上面带各种文字的标注,地图比较大,而且文字信息比较多而且分散.因为字体的问题,在我的windows电脑上虽然可以正常显示,但是复制出来的文字都是方块,而且对应 ...
UITableViewCell左滑的时候添加多个按钮的方法（iOS8+）以及UIRefreshControl（iOS6+）的使用。
之前想在cell左滑的时候添加更多的按钮而不是只有‘删除’按钮如下所示,貌似不是一件简单的事.但是现在只要实现几个方法就行了. 代码写的比较垃圾,重在理解这个知识.. . 具体代码: // // T ...
Maven3.0 服务器配置搭建
搭建nexus私服,原因很简单,不必多说,本文重点说下最新版的Maven 3.0.x系列的安装步骤. 最新版的网上中文资料很少,参考后都没成功.最后在官网的英文资料中得到答案,成功搞定. 1.确定我们 ...
[jquery]高级篇--标签选择
1>3中初始化 $(document).ready(function(){ alert("开始了"); }); $(function(){ trace("初始化方法 ...
[.Net MVC] 使用 log4net 日志框架
项目:后台管理平台意义:项目开发中提出增加日志功能,对关键的操作.程序运行中的错误信息进行记录,这对程序部署后的调试有很大意义. 注:本文只是对网上搜集的信息进行了整合,以备今后查询. 关键字:.N ...
android 权限总结
1.拨打电话要权限 2.sd目录存东西要权限

导出Excel文件

导出Excel文件的更多相关文章

随机推荐

热门专题