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using System;
using System.IO;
using System.Data;
using Microsoft.Office.Interop.Excel;
/// <summary>
/// 导出Excal文件
/// </summary>
public class ImportExcel
{
private string title;
private string rpt_name;
private string outFilePath;
private System.Data.DataTable dt;
private System.Data.DataTable outTable;
public ImportExcel()
{
}
/// <summary>
/// 设置Excel标题
/// </summary>
public string rptName
{
get
{
return title;
}
set
{
title = value;
}
}
/// <summary>
/// 需要导入EXCEL的表
/// </summary>
public System.Data.DataTable RptData
{
get
{
return dt;
}
set
{
dt = value;
}
}
/// <summary>
/// 设置输出文件的存放位置
/// </summary>
public string OutFilePath
{
get
{
return outFilePath;
}
set
{
outFilePath = value;
}
}
/// <summary>
/// 构造函数,使用该类需传入Excel标题,DataTable,文件的存放路径
/// </summary>
/// <param name="rptName">要设置的Excel标题</param>
/// <param name="dtable">要填充Excel的表</param>
/// <param name="FilePath">要存放的路径</param>
public ImportExcel(string rptName, System.Data.DataTable dtable, string file_path)
{
rpt_name = rptName;
outTable = dtable;
outFilePath = file_path;
try
{
this.InsertExcel();
}
catch (Exception e)
{
throw new Exception(e.Message);
}
}
/// <summary>
/// 该函数向Excel表中插入记录,要插入的数据为一个内存表.其中内存表中的列名为表中的列名
/// 该函数所使用的动态连接库Excel.dll,Office.dll,VBIDE.dll.
/// </summary>
public void InsertExcel()
{
int col_count = 0;
int row_count = 0;
int k = 0;
int l = 0;
//检查文件是否存在
if (File.Exists(outFilePath))
{
throw new Exception("文件已存在，创建失败！");
}
Microsoft.Office.Interop.Excel.ApplicationClass rptApp = new Microsoft.Office.Interop.Excel.ApplicationClass();
rptApp.Application.Workbooks.Add(true);
rptApp.Visible = false;
object missing = System.Reflection.Missing.Value;
Microsoft.Office.Interop.Excel.Workbook rptBook = rptApp.Workbooks[1];
Microsoft.Office.Interop.Excel.Worksheet rptSheet = (Microsoft.Office.Interop.Excel.Worksheet)rptBook.ActiveSheet;
//设置报表的标题
rptSheet.Cells[1, 1] = rpt_name;
//插入列标题
foreach (DataColumn col in outTable.Columns)
{
col_count++;
rptSheet.Cells[2, col_count] = col.ColumnName.ToString();
}
//设置列标题格式
rptSheet.get_Range(rptSheet.Cells[2, 1],rptSheet.Cells[2, col_count]).Font.Bold = true; // 是否加粗：是
//设置单元格的格式
foreach (DataRow dr in outTable.Rows)
{
row_count++;
col_count = 0;
foreach (DataColumn col in outTable.Columns)
{
col_count++;
if (col.DataType == System.Type.GetType("System.String"))
{
rptSheet.get_Range(rptSheet.Cells[1, 1], rptSheet.Cells[row_count + 2, col_count]).NumberFormatLocal = "@";
}
else if (col.DataType == System.Type.GetType("System.DateTime"))
{
rptSheet.get_Range(rptSheet.Cells[1, 1], rptSheet.Cells[row_count + 2, col_count]).NumberFormatLocal = "yyyy-m-d";
}
}
}
//向报表插入记录
for (int i = 0; i < outTable.Rows.Count; i++)
{
for (int j = 0; j < outTable.Columns.Count; j++)
{
k = i + 3;
l = j + 1;
rptSheet.Cells[k, l] = outTable.Rows[i][j].ToString();
rptSheet.get_Range(rptSheet.Cells[1, l], rptSheet.Cells[1, l]).Borders.LineStyle = 7;
rptSheet.get_Range(rptSheet.Cells[2, l], rptSheet.Cells[2, l]).Borders.LineStyle = 1;
rptSheet.get_Range(rptSheet.Cells[k, l], rptSheet.Cells[k, l]).Borders.LineStyle = 1;
}
}
//设置标题的格式
rptSheet.get_Range(rptSheet.Cells[1, 1], rptSheet.Cells[1, 1]).Font.Bold = true;
rptSheet.get_Range(rptSheet.Cells[1, 1], rptSheet.Cells[1, 1]).Font.Size = 22;
//设置报表的标题为跨列居中合并单元格
rptSheet.get_Range(rptSheet.Cells[1, 1], rptSheet.Cells[1, col_count]).Select();
rptSheet.get_Range(rptSheet.Cells[1, 1], rptSheet.Cells[1, col_count]).HorizontalAlignment = Microsoft.Office.Interop.Excel.XlHAlign.xlHAlignCenterAcrossSelection;
//设置报表表格为最适应宽度
rptSheet.get_Range(rptSheet.Cells[1, 1], rptSheet.Cells[row_count, col_count]).Select();
rptSheet.get_Range(rptSheet.Cells[1, 1], rptSheet.Cells[row_count, col_count]).Columns.AutoFit();
//另存文件到指定路径下
rptBook.SaveAs(outFilePath, missing, missing, missing, missing, missing, Microsoft.Office.Interop.Excel.XlSaveAsAccessMode.xlNoChange, missing, missing, missing, missing, missing);
//关闭文件
rptBook.Close(false, outFilePath, true);
rptApp.Quit();
System.Runtime.InteropServices.Marshal.ReleaseComObject(rptSheet);
System.Runtime.InteropServices.Marshal.ReleaseComObject(rptBook);
System.Runtime.InteropServices.Marshal.ReleaseComObject(rptApp);
//强制释放无用资源
GC.Collect();
}
}
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