〖接我上一篇C#導出Excel源碼. 网上...... 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,做报表的数据来源肯定就是数据库了。该ExcelManager目前只提供Ms Sql 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,可自行修改该类.),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 ExportToExcel { using System; using System.Data; using System.Data.SqlClient; using System.Windows.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: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 /// /// 建构函数 /// public ExcelManager(){} /// /// 建构函数 /// /// 一个Excel表格的最大记录数 /// 该数据库表共查询出多少条记录 /// 查询出的记录可分成几个Excel /// sqlConnection public ExcelManager(Double dbHL,Double dbTotal,int intDivide,SqlConnection conn ) { dbSheetSize = dbHL; intSheetTotalSize = intDivide; dbTotalSize = dbTotal; sqlConn = conn; } /// /// 建构函数 /// /// 一个Excel表格的最大记录数 /// 需查询的数据库的表名 /// sqlConnection 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; } } /// /// 取得总记录数跟可分成几个Excel sheet. /// /// 被查询的数据库的表名 /// sqlConnection /// 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); } /// /// 新建一个Excel实例 /// /// Excel表头上的文字 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 ); } } /// /// 以用户输入的文件名保存文件 /// 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; } /// /// 利用Excel的QueryTable导出数据 /// /// 导出第几个sheet /// 余下的数据是否大于指定的每个Sheet的最大记录数 /// 表头,需与查询sql语句对齐一致。 /// 查询的sql语句,表头的文字需与该sql语句对齐一致。 /// 查询的表名 /// 主标题 /// 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.ToShortDateString(); 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,CustomerID ", "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! |
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