再现C#导出Excel源码
[[wiki]wiki[/wiki]][/wiki]接我上一篇C#導出Excel源碼.网上反应比较强烈。本人也因为工作需要的原因，将其封装了成了ExcelManager。企业当中，做报表礫wiki]氖[/wiki]堇丛纯隙ň褪荹wiki]数据库[/wiki]了。该ExcelManager目前只提供Ms [wiki]SQL[/wiki] Server的支持，因为我们公司使用的就是ms sql server 2000 了。封装后的ExcelManager，你只需传入你的报表表头（一级表头、二级表头。大部分有两级也就够了。如果你有多个，可自行修改该[wiki]类[/wiki].）,并将对应的数据库表字段传入类库中的方法DeclareExcelApp即可。同前一篇一样，你可将下面代码复制另存一个新类就可以了（不知为什么，我在家里上网老是传附件不上来！faint...）。随后，我会给出一个调用的方法的：namespace E[wiki]XP[/wiki]ortToExcel{ using System; using System.Data; using System.Data.SqlClient; using System.[wiki]windows[/wiki].Forms; using System.Runtime.InteropServices;
/*************************** ****Class Name : ExcelManger ****Author: KingNa ****Create Date : 2006-9-1 ****CopyRight: Reserve this info if you want to User this Class **************************/ public class ExcelManager:IDis[wiki]POS[/wiki]able { 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.Q[wiki]UE[/wiki]ryTable m_objQryTable = null; [wiki]object[/wiki] 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 ExcelManager(){}
/// <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 ExcelManager(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 ExcelManager(Double dbHL,string strTableName,SqlConnection conn) { dbSheetSize = dbHL; sqlConn = conn; intSheetTotalSize = GetTotalSize(strTableName,sqlConn); }
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 == 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 = string.Empty; SaveFileDialog sf = new SaveFileDialog(); sf.Filter = "*.xls|*.*"; if (sf.ShowDialog() == DialogResult.OK) { excelFileName = sf.FileName; } else { return; } 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;
} 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.ToShortDa[wiki]Test[/wiki]ring(); for(int i = 1;i<=strTitle.Length;i ) { m_objSheet.Cells[4,i] = strTitle[i-1].ToString(); } m_objRange = m_objSheet.get_Range("A5", m_objOpt); m_objQryTable = m_objSheet.QueryTables.Add("OLEDB;Provider=SQLOLEDB.1;" sqlConn.ConnectionString, m_objRange, strQuery); m_objQryTable.RefreshStyle = Excel.XlCellInsertionMode.xlInsertEntireRows; m_objQryTable.FieldNames = false; m_objQryTable.Refresh(false); } }}
全盘复制另存新类后，调用方法示例如下： private void button2_Click(object sender, EventArgs e) { #region ExcelManager封装类导出Excel String strConnet ="Data Source='localhost';Password = ;User ID=sa;Initial Catalog=Northwind"; System.Data.SqlClient.SqlConnection sqlConn = new System.Data.SqlClient.SqlConnection(strConnet); ExcelManager exc = new ExcelManager(65530, "Orders", sqlConn); try { exc.DeclareExcelApp(new string[] { "编号","供应商编号" }, " OrderID,Cus[wiki]Tom[/wiki]erID ", "Orders", "报表标题"); //exc.SaveExcelApp(); } catch(Exception E) { MessageBox.Show(E.ToString()); } finally { exc.Dispose(); } #endregion } 以上使用的是Excel 2002 英文版。2003有些方法稍有出入。可参照前篇的C#导出Excel源码。另外，如果可能的话，我将封装其它数据库类型的Excel导出。有兴趣的朋友，请继续关继！
