using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Runtime.InteropServices;
using System.Data;
using System.Data.SqlClient;
namespace Test
{
public partial class _Default : System.Web.UI.Page,IDisposable
{
Excel.Range m_objRange = null;
Excel.Application m_objExcel = null;
Excel.Workbooks m_objBooks = null;
Excel._Workbook m_objBook = null;
Excel.Sheets m_objSheets = null;
Excel._Worksheet m_objSheet = null;
Excel.QueryTable m_objQryTable = null;
object m_objOpt = System.Reflection.Missing.Value;
//DataBase-used variable
private System.Data.SqlClient.SqlConnection sqlConn = null;
private string strConnect = string.Empty;
private System.Data.SqlClient.SqlCommand sqlCmd = null;
//Sheets variable
private double dbSheetSize = 65535;//the hight limit number in one sheet
private int intSheetTotalSize = 0;//total record can divied sheet number
private double dbTotalSize = 0;//record total number
/// <summary>
/// 建构函数
/// </summary>
public _Default(){}
/// <summary>
/// 建构函数
/// </summary>
/// <param name="dbHL">一个Excel表格的最大记录数</param>
/// <param name="dbTotal">该数据库表共查询出多少条记录</param>
/// <param name="intDivide">查询出的记录可分成几个Excel</param>
/// <param name="conn">sqlConnection</param>
public _Default(Double dbHL,Double dbTotal,int intDivide,SqlConnection conn )
{
dbSheetSize = dbHL;
intSheetTotalSize = intDivide;
dbTotalSize = dbTotal;
sqlConn = conn;
}
/// <summary>
/// 建构函数
/// </summary>
/// <param name="dbHL">一个Excel表格的最大记录数</param>
/// <param name="strTableName">需查询的数据库的表名</param>
/// <param name="conn">sqlConnection</param>
public _Default(Double dbHL,string strTableName,SqlConnection conn)
{
dbSheetSize = dbHL;
sqlConn = conn;
intSheetTotalSize = GetTotalSize(strTableName,conn);
}
public void Dispose()
{
Dispose(true);
GC.SuppressFinalize(this);
}
private void Dispose(bool disposing)
{
if(disposing)
{
// Dispose managed resources.
Marshal.FinalReleaseComObject(m_objExcel);
m_objRange = null;
m_objSheet = null;
m_objSheets = null;
m_objBooks = null;
m_objBook = null;
m_objExcel = null;
}
}
/// <summary>
/// 取得总记录数跟可分成几个Excel sheet.
/// </summary>
/// <param name="strTableName">被查询的数据库的表名</param>
/// <param name="sqlConn">sqlConnection</param>
/// <returns>可分成Excel Sheet的个数</returns>
private int GetTotalSize(string strTableName,SqlConnection sqlConn)
{
//sqlConn = new System.Data.SqlClient.SqlConnection(strConnect);
sqlCmd = new System.Data.SqlClient.SqlCommand("Select Count(*) From "+strTableName, sqlConn);
if(this.sqlConn.State == System.Data.ConnectionState.Closed) sqlConn.Open();
dbTotalSize = (int)sqlCmd.ExecuteScalar();
sqlConn.Close();
return (int)Math.Ceiling(dbTotalSize / this.dbSheetSize);
}
/// <summary>
/// 新建一个Excel实例
/// </summary>
/// <param name="strTitle">Excel表头上的文字</param>
public void DeclareExcelApp(string[] strTitle,string strSql,string strTableName,string strMastTitle)
{
m_objExcel = new Excel.ApplicationClass();
m_objExcel.Visible = true;
m_objBooks = (Excel.Workbooks)m_objExcel.Workbooks;
m_objBook = (Excel._Workbook)(m_objBooks.Add(m_objOpt));
m_objSheets = (Excel.Sheets)m_objBook.Worksheets;
if (intSheetTotalSize <= 3)
{
if (this.dbTotalSize <= this.dbSheetSize)
{
this.ExportDataByQueryTable(1, false,strTitle,strSql,strTableName,strMastTitle );
return;
}
else if (this.dbTotalSize <= this.dbSheetSize * 2)
{
this.ExportDataByQueryTable(1, false,strTitle,strSql,strTableName,strMastTitle );
this.ExportDataByQueryTable(2, true,strTitle,strSql,strTableName,strMastTitle );
return;
}
else
{
this.ExportDataByQueryTable(1, false,strTitle,strSql,strTableName,strMastTitle );
this.ExportDataByQueryTable(2, true,strTitle,strSql,strTableName,strMastTitle );
this.ExportDataByQueryTable(3, true,strTitle,strSql,strTableName,strMastTitle );
return;
}
}
for (int i = 3; i < intSheetTotalSize; i++)
{
m_objSheets.Add(m_objOpt, m_objSheets.get_Item(i), m_objOpt, m_objOpt);
}
ExportDataByQueryTable(1, false,strTitle,strSql,strTableName,strMastTitle );
for (int i = 2; i <= m_objSheets.Count; i++)
{
ExportDataByQueryTable(i, true,strTitle,strSql,strTableName,strMastTitle );
}
}
/// <summary>
/// 以用户输入的文件名保存文件
/// </summary>
public void SaveExcelApp()
{
string excelFileName = "通讯录";
m_objBook.SaveAs(excelFileName, m_objOpt, m_objOpt, m_objOpt, m_objOpt, m_objOpt,
Excel.XlSaveAsAccessMode.xlNoChange, m_objOpt, m_objOpt, m_objOpt, m_objOpt,m_objOpt);
if (m_objExcel != null)
m_objExcel = null;
}
/// <summary>
/// 利用Excel的QueryTable导出数据
/// </summary>
/// <param name="intSheetNumber">导出第几个sheet</param>
/// <param name="blIsMoreThan">余下的数据是否大于指定的每个Sheet的最大记录数</param>
/// <param name="strTitle">表头,需与查询sql语句对齐一致。</param>
/// <param name="strSql">查询的sql语句，表头的文字需与该sql语句对齐一致。</param>
/// <param name="strTablName">查询的表名</param>
/// <param name="strMastTitle">主标题</param>
/// </summary>
public void ExportDataByQueryTable(int intSheetNumber, bool blIsMoreThan,string[] strTitle,string strSql,string strTablName,string strMastTitle)
{
string strQuery = string.Empty;
if (blIsMoreThan)
{
strQuery = "Select Top " +
this.dbSheetSize + strSql + " From " + strTablName + " Where Not OrderID In (Select Top " +
dbSheetSize * (intSheetNumber - 1) + " OrderID From " + strTablName + ")";
}
else
{
strQuery = "Select Top " + this.dbSheetSize + strSql + " From " + strTablName;
}
//strQuery = "Select OrderID,CustomerID From [Order]";
m_objSheet = (Excel._Worksheet)(m_objSheets.get_Item(intSheetNumber));
//m_objSheet.Cells[1,1] = strMastTitle;
// m_objSheet.Cells[2,1] = "打印日期"+DateTime.Now.ToShortDateString();
for(int i = 1;i<=strTitle.Length;i++)
{
m_objSheet.Cells[1,i] = strTitle[i-1].ToString();
}
m_objRange = m_objSheet.get_Range("A2", m_objOpt);
m_objQryTable = m_objSheet.QueryTables.Add("OLEDB;Provider=SQLOLEDB.1;" + "Data Source='PC-05011703\\SQLEXPRESS';Initial Catalog=Orders;Integrated Security=SSPI", m_objRange, strQuery);
m_objQryTable.RefreshStyle = Excel.XlCellInsertionMode.xlInsertEntireRows;
m_objQryTable.FieldNames = false;
m_objQryTable.Refresh(false);
}
protected void Page_Load(object sender, EventArgs e)
{
//String strConnet = "Data Source='PC-05011703\\SQLEXPRESS';Initial Catalog=Orders;Integrated Security=SSPI";
DeclareExcelApp(new string[] { "编号", "供应商编号", "OrderName" }, " OrderID,CustomerID,OrderName ", "[Order]", "报表标题");
}
}
}