利用NPOI开源的读写Excel、WORD等微软OLE2组件读写execl，控制样式或单元格

[csharp] view
plaincopyprint?





using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

//add

using System.Data;

using System.IO;

using NPOI;

using NPOI.HSSF.UserModel;

public partial class ExeclOperation : System.Web.UI.Page

{

#region 页面加载

protected void Page_Load(object sender, EventArgs e)

{

DataTable dt = ReadExcelToDataTable("~/xls/demo001.xls", 0, 0);

ViewState["dtview"] = dt;

GridView1.DataSource = dt;

GridView1.DataBind();

}

#endregion

#region DS直接生成Execl

protected void btnExport_Click(object sender, EventArgs e)

{

DataSet ds = new DataSet();

DataTable dt = ViewState["dtview"] as DataTable;

ds.Tables.Add(dt);

bool success = ExportExcelByDataSet(ds, "~/xls/", "demo.xls", "这是测试数据");

if (success)

{

ScriptManager.RegisterClientScriptBlock(Page, typeof(Page), "alert1", "alert('生成execl文件成功')", true);

}

else

{

ScriptManager.RegisterClientScriptBlock(Page, typeof(Page), "alert2", "alert('生成execl文件失败')", true);

}

}

#endregion

#region GridView自动列适应，不换行

protected void GridView1_RowCreated(object sender, GridViewRowEventArgs e)

{

if (e.Row.RowType == DataControlRowType.DataRow || e.Row.RowType == DataControlRowType.Header)

{

TableCellCollection cells1 = e.Row.Cells;

for (int i = 0; i < cells1.Count; i++)

{

cells1[i].Wrap = false;

}

}

}

#endregion

#region DataSet与Execl互转

/// <summary>

/// 传入ds直接生成excel文件

/// </summary>

/// <param name="ds">DataSet</param>

/// <param name="strPath">文件路径</param>

/// <param name="strFileName">文件名</param>

/// <param name="ReportHeader">execl表头</param>

/// <returns></returns>

public static bool ExportExcelByDataSet(DataSet ds, string strPath, string strFileName, string ReportHeader = "")

{

//NPOI

HSSFWorkbook hssfworkbook2 = new HSSFWorkbook();

HSSFSheet sheet = (HSSFSheet)hssfworkbook2.CreateSheet("sheet1");

//定义字体 font 设置字体类型和大小

HSSFFont font = (HSSFFont)hssfworkbook2.CreateFont();

font.FontName = "宋体";

font.FontHeightInPoints = 11;

//定义单元格格式；单元格格式style1 为font的格式

HSSFCellStyle style1 = (HSSFCellStyle)hssfworkbook2.CreateCellStyle();

style1.SetFont(font);

style1.Alignment = NPOI.SS.UserModel.HorizontalAlignment.LEFT;

HSSFCellStyle style2 = (HSSFCellStyle)hssfworkbook2.CreateCellStyle();

style2.SetFont(font);

style2.Alignment = NPOI.SS.UserModel.HorizontalAlignment.CENTER;

style2.BorderBottom = NPOI.SS.UserModel.BorderStyle.THIN;

style2.BorderLeft = NPOI.SS.UserModel.BorderStyle.THIN;

style2.BorderRight = NPOI.SS.UserModel.BorderStyle.THIN;

style2.BorderTop = NPOI.SS.UserModel.BorderStyle.THIN;

//style2.WrapText = true;

//设置大标题行

int RowCount = 0;

int arrFlag = 0;

string TileName1 = "";

string TileName2 = "";

string s = ReportHeader;

string[] sArray = s.Split('|');

if (ReportHeader != "")

{

foreach (string i in sArray)

{

string str1 = i.ToString();

string[] subArray = str1.Split('@');

foreach (string k in subArray)

{

Console.WriteLine(k.ToString());

if (arrFlag == 0)

{

TileName1 = k.ToString();

}

else

{

TileName2 = k.ToString();

}

arrFlag = arrFlag + 1;

}

HSSFRow row0 = (HSSFRow)sheet.CreateRow(RowCount); //创建报表表头标题 8列

row0.CreateCell(0).SetCellValue(TileName1);

row0.CreateCell(1).SetCellValue(TileName2);

RowCount = RowCount + 1;

arrFlag = 0;

}

}

//设置全局列宽和行高

sheet.DefaultColumnWidth = 14;//全局列宽

sheet.DefaultRowHeightInPoints = 15;//全局行高

//设置标题行数据

int a = 0;

string mColumnName = "";

HSSFRow row1 = (HSSFRow)sheet.CreateRow(RowCount); //创建报表表头标题 8列

for (int k = 0; k < ds.Tables[0].Columns.Count; k++)

{

mColumnName = ds.Tables[0].Columns[k].ColumnName.ToString();

row1.CreateCell(a).SetCellValue(mColumnName);

row1.Cells[a].CellStyle = style2;

a++;

}

//填写ds数据进excel

for (int i = 0; i < ds.Tables[0].Rows.Count; i++)//写6行数据

{

HSSFRow row2 = (HSSFRow)sheet.CreateRow(i + RowCount + 1);

int b = 0;

for (int j = 0; j < ds.Tables[0].Columns.Count; j++)

{

string DgvValue = "";

DgvValue = ds.Tables[0].Rows[i][j].ToString(); ;

row2.CreateCell(b).SetCellValue(DgvValue);

b++;

}

}

//获取用户选择路径

string ReportPath = HttpContext.Current.Server.MapPath(strPath + strFileName);

//创建excel

System.IO.FileStream file3 = new FileStream(ReportPath, FileMode.Create);

hssfworkbook2.Write(file3);

file3.Close();

return true;

}

/// <summary>

/// 用NPOI直接读取excel返回DataTable

/// </summary>

/// <param name="ExcelFileStream">文件流</param>

/// <param name="SheetIndex">Sheet序号</param>

/// <param name="StartRowIndex">开始行号</param>

/// <returns></returns>

public static DataTable ReadExcelToDataTable(Stream ExcelFileStream, int SheetIndex, int StartRowIndex)

{

HSSFWorkbook workbook = new HSSFWorkbook(ExcelFileStream);

HSSFSheet sheet = (HSSFSheet)workbook.GetSheetAt(SheetIndex);

DataTable table = new DataTable();

HSSFRow headerRow = (HSSFRow)sheet.GetRow(StartRowIndex);

int cellCount = headerRow.LastCellNum;

for (int i = headerRow.FirstCellNum; i < cellCount; i++)

{

DataColumn column = new DataColumn(headerRow.GetCell(i).StringCellValue);

table.Columns.Add(column);

}

int rowCount = sheet.LastRowNum;

for (int i = (StartRowIndex + 1); i <= sheet.LastRowNum; i++)

{

HSSFRow row = (HSSFRow)sheet.GetRow(i);

DataRow dataRow = table.NewRow();

for (int j = row.FirstCellNum; j < cellCount; j++)

{

if (row.GetCell(j) != null)

dataRow[j] = row.GetCell(j).ToString();

}

table.Rows.Add(dataRow);

}

ExcelFileStream.Close();

workbook = null;

sheet = null;

return table;

}

/// <summary>

/// 用NPOI直接读取excel返回DataTable

/// </summary>

/// <param name="FilePath">文件路径</param>

/// <param name="SheetIndex">Sheet序号</param>

/// <param name="StartRowIndex">开始行号</param>

/// <returns></returns>

public static DataTable ReadExcelToDataTable(string FilePath, int SheetIndex, int StartRowIndex)

{

DataSet ds = new DataSet();

FileStream fs = File.Open(HttpContext.Current.Server.MapPath(FilePath), FileMode.Open);

DataTable dt = ReadExcelToDataTable(fs, SheetIndex, StartRowIndex);

return dt;

}

#endregion

}

[csharp] view
plaincopyprint?





#region DataSet与Execl互转

/// <summary>

/// 传入ds直接生成excel文件

/// </summary>

/// <param name="ds">DataSet</param>

/// <param name="strPath">文件路径</param>

/// <param name="ReportHeader">execl表头</param>

/// <returns></returns>

public static bool ExportExcelByDataSet(DataSet ds, string strPath, string ReportHeader = "")

{

//NPOI

HSSFWorkbook hssfworkbook2 = new HSSFWorkbook();

#region 循环开始

for (int p = 0; p < ds.Tables.Count; p++)

{

int t = p + 1;

HSSFSheet sheet = (HSSFSheet)hssfworkbook2.CreateSheet("page" + t);

//定义字体 font 设置字体类型和大小

HSSFFont font = (HSSFFont)hssfworkbook2.CreateFont();

font.FontName = "宋体";

font.FontHeightInPoints = 11;

//定义单元格格式；单元格格式style1 为font的格式

HSSFCellStyle style1 = (HSSFCellStyle)hssfworkbook2.CreateCellStyle();

style1.SetFont(font);

style1.Alignment = NPOI.SS.UserModel.HorizontalAlignment.LEFT;

HSSFCellStyle style2 = (HSSFCellStyle)hssfworkbook2.CreateCellStyle();

style2.SetFont(font);

style2.Alignment = NPOI.SS.UserModel.HorizontalAlignment.CENTER;

style2.BorderBottom = NPOI.SS.UserModel.BorderStyle.THIN;

style2.BorderLeft = NPOI.SS.UserModel.BorderStyle.THIN;

style2.BorderRight = NPOI.SS.UserModel.BorderStyle.THIN;

style2.BorderTop = NPOI.SS.UserModel.BorderStyle.THIN;

//style2.WrapText = true;

//设置大标题行

int RowCount = 0;

int arrFlag = 0;

string TileName1 = "";

string TileName2 = "";

string s = ReportHeader;

string[] sArray = s.Split('|');

if (ReportHeader != "")

{

foreach (string i in sArray)

{

string str1 = i.ToString();

string[] subArray = str1.Split('@');

foreach (string k in subArray)

{

Console.WriteLine(k.ToString());

if (arrFlag == 0)

{

TileName1 = k.ToString();

}

else

{

TileName2 = k.ToString();

}

arrFlag = arrFlag + 1;

}

HSSFRow row0 = (HSSFRow)sheet.CreateRow(RowCount); //创建报表表头标题 8列

row0.CreateCell(0).SetCellValue(TileName1);

row0.CreateCell(1).SetCellValue(TileName2);

RowCount = RowCount + 1;

arrFlag = 0;

}

}

//设置全局列宽和行高

sheet.DefaultColumnWidth = 14;//全局列宽

sheet.DefaultRowHeightInPoints = 15;//全局行高

//设置标题行数据

int a = 0;

string mColumnName = "";

HSSFRow row1 = (HSSFRow)sheet.CreateRow(RowCount); //创建报表表头标题 8列

for (int k = 0; k < ds.Tables[p].Columns.Count; k++)

{

mColumnName = ds.Tables[p].Columns[k].ColumnName.ToString();

row1.CreateCell(a).SetCellValue(mColumnName);

row1.Cells[a].CellStyle = style2;

a++;

}

//填写ds数据进excel

for (int i = 0; i < ds.Tables[p].Rows.Count; i++)//写6行数据

{

HSSFRow row2 = (HSSFRow)sheet.CreateRow(i + RowCount + 1);

int b = 0;

for (int j = 0; j < ds.Tables[p].Columns.Count; j++)

{

string DgvValue = "";

DgvValue = ds.Tables[p].Rows[i][j].ToString(); ;

row2.CreateCell(b).SetCellValue(DgvValue);

b++;

}

}

}

#endregion

//获取用户选择路径

string ReportPath = (strPath);

//创建excel

System.IO.FileStream file3 = new FileStream(ReportPath, FileMode.Create);

hssfworkbook2.Write(file3);

file3.Close();

return true;

}

/// <summary>

/// 用NPOI直接读取excel返回DataSet

/// </summary>

/// <param name="ExcelFileStream">FileStream fs = File.Open(dlg.FileName, FileMode.Open);</param>

/// <param name="SheetCount">sheet数量</param>

/// <returns></returns>

public static DataSet ReadExcelToDataSet(Stream ExcelFileStream,int SheetCount)

{

HSSFWorkbook workbook = new HSSFWorkbook(ExcelFileStream);

DataSet ds = new DataSet();

for (int k = 0; k < SheetCount; k++)

{

HSSFSheet sheet = (HSSFSheet)workbook.GetSheetAt(k);

DataTable table = new DataTable("table" + k);

HSSFRow headerRow = (HSSFRow)sheet.GetRow(0);

int cellCount = headerRow.LastCellNum;

for (int i = headerRow.FirstCellNum; i < cellCount; i++)

{

string columnName = headerRow.GetCell(i).StringCellValue;

DataColumn column = new DataColumn(columnName);

if (!table.Columns.Contains(columnName))

{

table.Columns.Add(column);

}

}

int rowCount = sheet.LastRowNum;

for (int i = (0 + 1); i <= sheet.LastRowNum; i++)

{

HSSFRow row = (HSSFRow)sheet.GetRow(i);

DataRow dataRow = table.NewRow();

for (int j = row.FirstCellNum; j < cellCount; j++)

{

if (row.GetCell(j) != null)

dataRow[j] = row.GetCell(j);

}

table.Rows.Add(dataRow);

}

sheet = null;

ds.Tables.Add(table);

}

workbook = null;

ExcelFileStream.Close();

return ds;

}

#endregion