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; /// <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;
}
}

  

数据导出至Excel文件--好库编程网http://code1.okbase.net/codefile/SerializeHelper.cs_2012122018724_118.htm的更多相关文章

  1. Qt中将QTableView中的数据导出为Excel文件

    如果你在做一个报表类的程序,可能将内容导出为Excel文件是一项必须的功能.之前使用MFC的时候我就写过一个类,用于将grid中的数据导出为Excel文件.在使用了QtSql模块后,我很容易的将这个类 ...

  2. Pl/sql 如何将oracle的表数据导出成excel文件?

    oracle将表数据导出成excel文件的方法 1)在SQL窗体上,查询需要导出的数据 --查询数据条件-- ; 结果视图 2)在查询结果的空白处,右键选择Copy to Excel 3) 查看导出e ...

  3. C#将数据集DataSet中的数据导出到EXCEL文件的几种方法

    using System; using System.Collections.Generic; using System.Text; using System.Data; using System.W ...

  4. VB将MSHFlexGrid数据导出到Excel文件通用功能

    1.通用导出Excel功能. 2.将 MSHFlexGrid数据导出到Excel文件通用功能. 3.具体代码如下: '将下列代码保存到一模块文件中,调用方法:Export fgrid1,cd1 Pub ...

  5. 用node.js写一个简单爬虫,并将数据导出为 excel 文件

    引子 最近折腾node,最开始像无头苍蝇一样到处找资料,然而多数没什么卵用,都在瞎比比.在一阵瞎搞后,我来分享一下初步学习node的三个过程: 1 撸一遍NODE入门,对其有个基本的了解: 2 撸一遍 ...

  6. C#中dategridview数据导出为excel文件

    先从数据库中获取数据,绑定在datagridview中,再从dategridview中导出为excel文件 1.新建窗体,把控件datagridview和按钮设置好,如图

  7. vb.net-三种将datagridview数据导出为excel文件的函数

    第一种方法较慢,但是数据格式都比较好,需要引用excel的 Microsoft.Office.Interop.Excel.dll  office.dll #Region "导出excel函数 ...

  8. html5中 table数据导出到excel文件

    JS代码: /** * table数据导出到excel * 形参 table : tableId ; * sheetName : 工作薄名 * fileName : 文件名 * linkId :隐藏的 ...

  9. Datagrid数据导出到excel文件的三种方法

    原文连接: http://www.cnblogs.com/xieduo/articles/606202.html 一.文件保存在服务器,提供下载 方法一:导出到csv文件,存放在服务器端任一路径,然后 ...

随机推荐

  1. HDU 1053 & HDU 2527 哈夫曼编码

    http://acm.hdu.edu.cn/showproblem.php?pid=1053 #include <iostream> #include <cstdio> #in ...

  2. What are the 10 algorithms one must know in order to solve most algorithm challenges/puzzles?

    QUESTION : What are the 10 algorithms one must know in order to solve most algorithm challenges/puzz ...

  3. 如何使用SnpEff 对SNP结果进行分析

    SnpEff is a variant annotation and effect prediction tool. It annotates and predicts the effects of ...

  4. 如何在ALV_Grid的函数中定义下拉列表

    转自 http://www.cnblogs.com/VerySky/articles/2392262.htmlABAP--如何在ALV_Grid的函数中定义下拉列表 REPORT. ********* ...

  5. Blob 构造函数

    Blob 构造函数使 Web 开发人员可直接在客户端上创建或操作 Blob(经常等效于一个文件). 该构造函数在 W3C 的文件 API 规范中进行定义,该规范目前尚处于工作草案阶段.在较早版本的文件 ...

  6. 计算2的N次方

    总时间限制:  1000ms 内存限制:  65536kB 描述 任意给定一个正整数N(N<=100),计算2的n次方的值. 输入 输入一个正整数N. 输出 输出2的N次方的值. 样例输入 5 ...

  7. jquery绑定回车键发送(登录)

    $(function(){        $(document).keydown(function(e){            if(e.keyCode==13){                $ ...

  8. Git 基础应用

    Git 学习 1.git工具基本含义 git最大的用处就是记录每个版本的变动.比较每个版本的不同,以及多人维护和开发同一个项目.支持版本回退. 2.git基本命令 a.创建版本库 $ mkdir le ...

  9. 【BZOJ1004】【HNOI20008】cards

    看黄学长的代码才写出来的,sro_hzwer_orz 原题: 小春现在很清闲,面对书桌上的N张牌,他决定给每张染色,目前小春只有3种颜色:红色,蓝色,绿色.他询问Sun有多少种染色方案,Sun很快就给 ...

  10. 自我提升mysql

    1.某字段更新 自增 1 update table set a=a+1 2.修改某一字段的数据类型 alter table "tablename" modify  "co ...