The first one: using Microsoft.Office.Interop.Excel.dll
public void ExportExcel(DataTable dt)
{
if (dt != null)
{
Microsoft.Office.Interop.Excel.Application excel = new Microsoft.Office.Interop.Excel.Application();
if (excel == null)
{
return;
}
//设置为不可见，操作在后台执行，为 true 的话会打开 Excel
excel.Visible = false;
//打开时设置为全屏显式
//excel.DisplayFullScreen = true;
//初始化工作簿
Microsoft.Office.Interop.Excel.Workbooks workbooks = excel.Workbooks;
//新增加一个工作簿，Add（）方法也可以直接传入参数 true
Microsoft.Office.Interop.Excel.Workbook workbook = workbooks.Add(Microsoft.Office.Interop.Excel.XlWBATemplate.xlWBATWorksheet);
//同样是新增一个工作簿，但是会弹出保存对话框
//Microsoft.Office.Interop.Excel.Workbook workbook = excel.Application.Workbooks.Add(true);
//新增加一个 Excel 表(sheet)
Microsoft.Office.Interop.Excel.Worksheet worksheet = (Microsoft.Office.Interop.Excel.Worksheet)workbook.Worksheets[1];
//设置表的名称
worksheet.Name = dt.TableName;
try
{
//创建一个单元格
Microsoft.Office.Interop.Excel.Range range;
int rowIndex = 1; //行的起始下标为 1
int colIndex = 1; //列的起始下标为 1
//设置列名
for (int i = 0; i < dt.Columns.Count; i++)
{
//设置第一行，即列名
worksheet.Cells[rowIndex, colIndex + i] = dt.Columns[i].ColumnName;
//获取第一行的每个单元格
range = worksheet.Cells[rowIndex, colIndex + i];
//设置单元格的内部颜色
range.Interior.ColorIndex = 33;
//字体加粗
range.Font.Bold = true;
//设置为黑色
range.Font.Color = 0;
//设置为宋体
range.Font.Name = "Arial";
//设置字体大小
range.Font.Size = 12;
//水平居中
range.HorizontalAlignment = Microsoft.Office.Interop.Excel.XlHAlign.xlHAlignCenter;
//垂直居中
range.VerticalAlignment = Microsoft.Office.Interop.Excel.XlVAlign.xlVAlignCenter;
}
//跳过第一行，第一行写入了列名
rowIndex++;
//写入数据
for (int i = 0; i < dt.Rows.Count; i++)
{
for (int j = 0; j < dt.Columns.Count; j++)
{
worksheet.Cells[rowIndex + i, colIndex + j] = dt.Rows[i][j].ToString();
}
}
//设置所有列宽为自动列宽
//worksheet.Columns.AutoFit();
//设置所有单元格列宽为自动列宽
worksheet.Cells.Columns.AutoFit();
//worksheet.Cells.EntireColumn.AutoFit();
//是否提示，如果想删除某个sheet页，首先要将此项设为fasle。
excel.DisplayAlerts = false;
//保存写入的数据，这里还没有保存到磁盘
workbook.Saved = true;
//设置导出文件路径
string path = HttpContext.Current.Server.MapPath("Export/");
//设置新建文件路径及名称
string savePath = path + DateTime.Now.ToString("yyyy-MM-dd-HH-mm-ss") + ".xlsx";
//创建文件
FileStream file = new FileStream(savePath, FileMode.CreateNew);
//关闭释放流，不然没办法写入数据
file.Close();
file.Dispose();
//保存到指定的路径
workbook.SaveCopyAs(savePath);
//还可以加入以下方法输出到浏览器下载
FileInfo fileInfo = new FileInfo(savePath);
OutputClient(fileInfo);
}
catch(Exception ex)
{
}
finally
{
workbook.Close(false, Type.Missing, Type.Missing);
workbooks.Close();
//关闭退出
excel.Quit();
//释放 COM 对象
Marshal.ReleaseComObject(worksheet);
Marshal.ReleaseComObject(workbook);
Marshal.ReleaseComObject(workbooks);
Marshal.ReleaseComObject(excel);
worksheet = null;
workbook = null;
workbooks = null;
excel = null;
GC.Collect();
}
}
}
public void OutputClient(FileInfo file)
{
HttpContext.Current.Response.Buffer = true;
HttpContext.Current.Response.Clear();
HttpContext.Current.Response.ClearHeaders();
HttpContext.Current.Response.ClearContent();
HttpContext.Current.Response.ContentType = "application/vnd.ms-excel";
//导出到 .xlsx 格式不能用时，可以试试这个
//HttpContext.Current.Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
HttpContext.Current.Response.AddHeader("Content-Disposition", string.Format("attachment; filename={0}.xlsx", DateTime.Now.ToString("yyyy-MM-dd-HH-mm")));
HttpContext.Current.Response.Charset = "GB2312";
HttpContext.Current.Response.ContentEncoding = Encoding.GetEncoding("GB2312");
HttpContext.Current.Response.AddHeader("Content-Length", file.Length.ToString());
HttpContext.Current.Response.WriteFile(file.FullName);
HttpContext.Current.Response.Flush();
HttpContext.Current.Response.Close();
}First, you need to install office excel, then find the Microsoft.Office.Interop.Excel.dll component and add it to the reference.
The performance of the first method is really unsatisfactory, and it has too many limitations. First, you must install office (if it is not on your computer), and you need to specify the path to save the file when exporting. It can also be output to the browser for download, of course provided that the written data has been saved.
Second: use Aspose.Cells.dll
Aspose.Cells is a control for exporting Excel launched by Aspose Company. It does not rely on Office or commercial software and is chargeable.
public void ExportExcel(DataTable dt)
{
try
{
//获取指定虚拟路径的物理路径
string path = HttpContext.Current.Server.MapPath("DLL/") + "License.lic";
//读取 License 文件
Stream stream = (Stream)File.OpenRead(path);
//注册 License
Aspose.Cells.License li = new Aspose.Cells.License();
li.SetLicense(stream);
//创建一个工作簿
Aspose.Cells.Workbook workbook = new Aspose.Cells.Workbook();
//创建一个 sheet 表
Aspose.Cells.Worksheet worksheet = workbook.Worksheets[0];
//设置 sheet 表名称
worksheet.Name = dt.TableName;
Aspose.Cells.Cell cell;
int rowIndex = 0; //行的起始下标为 0
int colIndex = 0; //列的起始下标为 0
//设置列名
for (int i = 0; i < dt.Columns.Count; i++)
{
//获取第一行的每个单元格
cell = worksheet.Cells[rowIndex, colIndex + i];
//设置列名
cell.PutValue(dt.Columns[i].ColumnName);
//设置字体
cell.Style.Font.Name = "Arial";
//设置字体加粗
cell.Style.Font.IsBold = true;
//设置字体大小
cell.Style.Font.Size = 12;
//设置字体颜色
cell.Style.Font.Color = System.Drawing.Color.Black;
//设置背景色
cell.Style.BackgroundColor = System.Drawing.Color.LightGreen;
}
//跳过第一行，第一行写入了列名
rowIndex++;
//写入数据
for (int i = 0; i < dt.Rows.Count; i++)
{
for (int j = 0; j < dt.Columns.Count; j++)
{
cell = worksheet.Cells[rowIndex + i, colIndex + j];
cell.PutValue(dt.Rows[i][j]);
}
}
//自动列宽
worksheet.AutoFitColumns();
//设置导出文件路径
path = HttpContext.Current.Server.MapPath("Export/");
//设置新建文件路径及名称
string savePath = path + DateTime.Now.ToString("yyyy-MM-dd-HH-mm-ss") + ".xlsx";
//创建文件
FileStream file = new FileStream(savePath, FileMode.CreateNew);
//关闭释放流，不然没办法写入数据
file.Close();
file.Dispose();
//保存至指定路径
workbook.Save(savePath);
//或者使用下面的方法，输出到浏览器下载。
//byte[] bytes = workbook.SaveToStream().ToArray();
//OutputClient(bytes);
worksheet = null;
workbook = null;
}
catch(Exception ex)
{
}
}
public void OutputClient(byte[] bytes)
{
HttpContext.Current.Response.Buffer = true;
HttpContext.Current.Response.Clear();
HttpContext.Current.Response.ClearHeaders();
HttpContext.Current.Response.ClearContent();
HttpContext.Current.Response.ContentType = "application/vnd.ms-excel";
HttpContext.Current.Response.AddHeader("Content-Disposition", string.Format("attachment; filename={0}.xls", DateTime.Now.ToString("yyyy-MM-dd-HH-mm")));
HttpContext.Current.Response.Charset = "GB2312";
HttpContext.Current.Response.ContentEncoding = Encoding.GetEncoding("GB2312");
HttpContext.Current.Response.BinaryWrite(bytes);
HttpContext.Current.Response.Flush();
HttpContext.Current.Response.Close();
}You can refer to: http://www.cnblogs.com/xiaofengfeng/archive/2012/09/27/2706211.html#top
Method to format cells as text:
cell = worksheet.Cells[rowIndex, colIndex + i];
cell.PutValue(colNames[i]);
style = cell.GetStyle();
style.Number = 49; // 49（text|@） 表示为文本
cell.SetStyle(style);
The second method has good performance, and the operation is not complicated. You can set the path to save the file when exporting, and you can also save it as a stream and output it to the browser for download.
The third type: Microsoft.Jet.OLEDB
This method of operating Excel is similar to operating a database. Let's first introduce the connection string:
// Excel 2003 版本连接字符串
string strConn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:/xxx.xls;Extended Properties='Excel 8.0;HDR=Yes;IMEX=2;'";
// Excel 2007 以上版本连接字符串
string strConn = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:/xxx.xlsx;Extended Properties='Excel 12.0;HDR=Yes;IMEX=2;'";
Provider：驱动程序名称
Data Source：指定 Excel 文件的路径
Extended Properties：Excel 8.0 针对 Excel 2000 及以上版本；Excel 12.0 针对 Excel 2007 及以上版本。
HDR：Yes 表示第一行包含列名,在计算行数时就不包含第一行。NO 则完全相反。
IMEX：0 写入模式；1 读取模式；2 读写模式。如果报错为“不能修改表 sheet1 的设计。它在只读数据库中”，那就去掉这个，问题解决。
public void ExportExcel(DataTable dt)
{
OleDbConnection conn = null;
OleDbCommand cmd = null;
Microsoft.Office.Interop.Excel.Application excel = new Microsoft.Office.Interop.Excel.Application();
Microsoft.Office.Interop.Excel.Workbooks workbooks = excel.Workbooks;
Microsoft.Office.Interop.Excel.Workbook workbook = workbooks.Add(true);
try
{
//设置区域为当前线程的区域
dt.Locale = System.Threading.Thread.CurrentThread.CurrentCulture;
//设置导出文件路径
string path = HttpContext.Current.Server.MapPath("Export/");
//设置新建文件路径及名称
string savePath = path + DateTime.Now.ToString("yyyy-MM-dd-HH-mm-ss") + ".xlsx";
//创建文件
FileStream file = new FileStream(savePath, FileMode.CreateNew);
//关闭释放流，不然没办法写入数据
file.Close();
file.Dispose();
//由于使用流创建的 excel 文件不能被正常识别，所以只能使用这种方式另存为一下。
workbook.SaveCopyAs(savePath);
// Excel 2003 版本连接字符串
//string strConn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source='" + savePath + "';Extended Properties='Excel 8.0;HDR=Yes;'";
// Excel 2007 以上版本连接字符串
string strConn = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source='"+ savePath + "';Extended Properties='Excel 12.0;HDR=Yes;'";
//创建连接对象
conn = new OleDbConnection(strConn);
//打开连接
conn.Open();
//创建命令对象
cmd = conn.CreateCommand();
//获取 excel 所有的数据表。
//new object[] { null, null, null, "Table" }指定返回的架构信息：参数介绍
//第一个参数指定目录
//第二个参数指定所有者
//第三个参数指定表名
//第四个参数指定表类型
DataTable dtSheetName = conn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, new object[] { null, null, null, "Table" });
//因为后面创建的表都会在最后面，所以本想删除掉前面的表，结果发现做不到，只能清空数据。
for (int i = 0; i < dtSheetName.Rows.Count; i++)
{
cmd.CommandText = "drop table [" + dtSheetName.Rows[i]["TABLE_NAME"].ToString() + "]";
cmd.ExecuteNonQuery();
}
//添加一个表，即 Excel 中 sheet 表
cmd.CommandText = "create table " + dt.TableName + " ([S_Id] INT,[S_StuNo] VarChar,[S_Name] VarChar,[S_Sex] VarChar,[S_Height] VarChar,[S_BirthDate] VarChar,[C_S_Id] INT)";
cmd.ExecuteNonQuery();
for (int i = 0; i < dt.Rows.Count; i++)
{
string values = "";
for (int j = 0; j < dt.Columns.Count; j++)
{
values += "'" + dt.Rows[i][j].ToString() + "',";
}
//判断最后一个字符是否为逗号，如果是就截取掉
if (values.LastIndexOf(',') == values.Length - 1)
{
values = values.Substring(0, values.Length - 1);
}
//写入数据
cmd.CommandText = "insert into " + dt.TableName + " (S_Id,S_StuNo,S_Name,S_Sex,S_Height,S_BirthDate,C_S_Id) values (" + values + ")";
cmd.ExecuteNonQuery();
}
conn.Close();
conn.Dispose();
cmd.Dispose();
//加入下面的方法，把保存的 Excel 文件输出到浏览器下载。需要先关闭连接。
FileInfo fileInfo = new FileInfo(savePath);
OutputClient(fileInfo);
}
catch (Exception ex)
{
}
finally
{
workbook.Close(false, Type.Missing, Type.Missing);
workbooks.Close();
excel.Quit();
Marshal.ReleaseComObject(workbook);
Marshal.ReleaseComObject(workbooks);
Marshal.ReleaseComObject(excel);
workbook = null;
workbooks = null;
excel = null;
GC.Collect();
}
}
public void OutputClient(FileInfo file)
{
HttpResponse response = HttpContext.Current.Response;
response.Buffer = true;
response.Clear();
response.ClearHeaders();
response.ClearContent();
response.ContentType = "application/vnd.ms-excel";
//导出到 .xlsx 格式不能用时，可以试试这个
//HttpContext.Current.Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
response.AddHeader("Content-Disposition", string.Format("attachment; filename={0}.xlsx", DateTime.Now.ToString("yyyy-MM-dd-HH-mm")));
response.Charset = "GB2312";
response.ContentEncoding = Encoding.GetEncoding("GB2312");
response.AddHeader("Content-Length", file.Length.ToString());
response.WriteFile(file.FullName);
response.Flush();
response.Close();
}This method requires specifying an existing Excel file as a template for writing data. Otherwise, you have to use a stream to create a new Excel file, but this is unrecognizable, so you need to use Microsoft.Office.Interop. The Microsoft.Office.Interop.Excel.Workbook.SaveCopyAs() method in Excel.dll is saved as, so the performance is even worse.
The tables created using the operation command are all at the end, and the front ones cannot be deleted (I have not found a way). Of course, you can no longer create them, and you can also write data directly.
The fourth type: NPOI
NPOI is the .NET version of the POI project. It does not use Office COM components and does not require the installation of Microsoft Office. It currently supports Office 2003 and 2007 versions.
NPOI is free and open source and easy to operate. Download address: http://npoi.codeplex.com/
public void ExportExcel(DataTable dt)
{
try
{
//创建一个工作簿
IWorkbook workbook = new HSSFWorkbook();
//创建一个 sheet 表
ISheet sheet = workbook.CreateSheet(dt.TableName);
//创建一行
IRow rowH = sheet.CreateRow(0);
//创建一个单元格
ICell cell = null;
//创建单元格样式
ICellStyle cellStyle = workbook.CreateCellStyle();
//创建格式
IDataFormat dataFormat = workbook.CreateDataFormat();
//设置为文本格式，也可以为 text，即 dataFormat.GetFormat("text");
cellStyle.DataFormat = dataFormat.GetFormat("@");
//设置列名
foreach (DataColumn col in dt.Columns)
{
//创建单元格并设置单元格内容
rowH.CreateCell(col.Ordinal).SetCellValue(col.Caption);
//设置单元格格式
rowH.Cells[col.Ordinal].CellStyle = cellStyle;
}
//写入数据
for (int i = 0; i < dt.Rows.Count; i++)
{
//跳过第一行，第一行为列名
IRow row = sheet.CreateRow(i + 1);
for (int j = 0; j < dt.Columns.Count; j++)
{
cell = row.CreateCell(j);
cell.SetCellValue(dt.Rows[i][j].ToString());
cell.CellStyle = cellStyle;
}
}
//设置导出文件路径
string path = HttpContext.Current.Server.MapPath("Export/");
//设置新建文件路径及名称
string savePath = path + DateTime.Now.ToString("yyyy-MM-dd-HH-mm-ss") + ".xls";
//创建文件
FileStream file = new FileStream(savePath, FileMode.CreateNew,FileAccess.Write);
//创建一个 IO 流
MemoryStream ms = new MemoryStream();
//写入到流
workbook.Write(ms);
//转换为字节数组
byte[] bytes = ms.ToArray();
file.Write(bytes, 0, bytes.Length);
file.Flush();
//还可以调用下面的方法，把流输出到浏览器下载
OutputClient(bytes);
//释放资源
bytes = null;
ms.Close();
ms.Dispose();
file.Close();
file.Dispose();
workbook.Close();
sheet = null;
workbook = null;
}
catch(Exception ex)
{
}
}
public void OutputClient(byte[] bytes)
{
HttpResponse response = HttpContext.Current.Response;
response.Buffer = true;
response.Clear();
response.ClearHeaders();
response.ClearContent();
response.ContentType = "application/vnd.ms-excel";
response.AddHeader("Content-Disposition", string.Format("attachment; filename={0}.xls", DateTime.Now.ToString("yyyy-MM-dd-HH-mm-ss")));
response.Charset = "GB2312";
response.ContentEncoding = Encoding.GetEncoding("GB2312");
response.BinaryWrite(bytes);
response.Flush();
response.Close();
}
// 2007 版本创建一个工作簿
IWorkbook workbook = new XSSFWorkbook();
// 2003 版本创建一个工作簿
IWorkbook workbook = new HSSFWorkbook();
PS: To operate the 2003 version, you need to add a reference to NPOI.dll, and to operate the 2007 version, you need to add a reference to NPOI.OOXML.dll.
The fifth type: GridView
Use GridView directly to convert DataTable data into a string stream, and then output it to the browser for download.
public void ExportExcel(DataTable dt)
{
HttpResponse response = HttpContext.Current.Response;
response.Buffer = true;
response.Clear();
response.ClearHeaders();
response.ClearContent();
response.ContentType = "application/vnd.ms-excel";
response.AddHeader("content-disposition", string.Format("attachment; filename={0}.xls", DateTime.Now.ToString("yyyy-MM-dd-HH-mm-ss")));
response.Charset = "GB2312";
response.ContentEncoding = Encoding.GetEncoding("GB2312");
//实例化一个流
StringWriter stringWrite = new StringWriter();
//指定文本输出到流
HtmlTextWriter htmlWrite = new HtmlTextWriter(stringWrite);
GridView gv = new GridView();
gv.DataSource = dt;
gv.DataBind();
for (int i = 0; i < dt.Rows.Count; i++)
{
for (int j = 0; j < dt.Columns.Count; j++)
{
//设置每个单元格的格式
gv.Rows[i].Cells[j].Attributes.Add("style", "vnd.ms-excel.numberformat:@");
}
}
//把 GridView 的内容输出到 HtmlTextWriter
gv.RenderControl(htmlWrite);
response.Write(stringWrite.ToString());
response.Flush();
response.Close();
}When exporting an Excel file in .xlsx format in this way, it cannot be opened. When exporting to .xls format, it will prompt that the file format and extension do not match, but it can be opened.
Sixth type: DataGrid
In fact, this method is almost the same as the one above.
public void ExportExcel(DataTable dt)
{
HttpResponse response = HttpContext.Current.Response;
response.Buffer = true;
response.Clear();
response.ClearHeaders();
response.ClearContent();
response.ContentType = "application/vnd.ms-excel";
response.AddHeader("content-disposition", string.Format("attachment; filename={0}.xls", DateTime.Now.ToString("yyyy-MM-dd-HH-mm-ss")));
response.Charset = "GB2312";
response.ContentEncoding = Encoding.GetEncoding("GB2312");
//实例化一个流
StringWriter stringWrite = new StringWriter();
//指定文本输出到流
HtmlTextWriter htmlWrite = new HtmlTextWriter(stringWrite);
DataGrid dg = new DataGrid();
dg.DataSource = dt;
dg.DataBind();
dg.Attributes.Add("style", "vnd.ms-excel.numberformat:@");
//把 DataGrid 的内容输出到 HtmlTextWriter
dg.RenderControl(htmlWrite);
response.Write(stringWrite.ToString());
response.Flush();
response.Close();
}Type 7: Use IO stream directly
The first way is to use a file stream to create an Excel file on the disk, and then use the stream to write the data.
public void ExportExcel(DataTable dt)
{
//设置导出文件路径
string path = HttpContext.Current.Server.MapPath("Export/");
//设置新建文件路径及名称
string savePath = path + DateTime.Now.ToString("yyyy-MM-dd-HH-mm-ss") + ".xls";
//创建文件
FileStream file = new FileStream(savePath, FileMode.CreateNew, FileAccess.Write);
//以指定的字符编码向指定的流写入字符
StreamWriter sw = new StreamWriter(file, Encoding.GetEncoding("GB2312"));
StringBuilder strbu = new StringBuilder();
//写入标题
for (int i = 0; i < dt.Columns.Count; i++)
{
strbu.Append(dt.Columns[i].ColumnName.ToString() + "\t");
}
//加入换行字符串
strbu.Append(Environment.NewLine);
//写入内容
for (int i = 0; i < dt.Rows.Count; i++)
{
for (int j = 0; j < dt.Columns.Count; j++)
{
strbu.Append(dt.Rows[i][j].ToString() + "\t");
}
strbu.Append(Environment.NewLine);
}
sw.Write(strbu.ToString());
sw.Flush();
file.Flush();
sw.Close();
sw.Dispose();
file.Close();
file.Dispose();
}The second method, this method does not require creating files on the local disk. First, create a memory stream to write data, and then output it to the browser for download.
public void ExportExcel(DataTable dt)
{
//创建一个内存流
MemoryStream ms = new MemoryStream();
//以指定的字符编码向指定的流写入字符
StreamWriter sw = new StreamWriter(ms, Encoding.GetEncoding("GB2312"));
StringBuilder strbu = new StringBuilder();
//写入标题
for (int i = 0; i < dt.Columns.Count; i++)
{
strbu.Append(dt.Columns[i].ColumnName.ToString() + "\t");
}
//加入换行字符串
strbu.Append(Environment.NewLine);
//写入内容
for (int i = 0; i < dt.Rows.Count; i++)
{
for (int j = 0; j < dt.Columns.Count; j++)
{
strbu.Append(dt.Rows[i][j].ToString() + "\t");
}
strbu.Append(Environment.NewLine);
}
sw.Write(strbu.ToString());
sw.Flush();
sw.Close();
sw.Dispose();
//转换为字节数组
byte[] bytes = ms.ToArray();
ms.Close();
ms.Dispose();
OutputClient(bytes);
}One drawback of this method is that it cannot set the format of the cell (at least I didn't find it, I lost it below).
public void OutputClient(byte[] bytes)
{
HttpResponse response = HttpContext.Current.Response;
response.Buffer = true;
response.Clear();
response.ClearHeaders();
response.ClearContent();
response.ContentType = "application/vnd.ms-excel";
response.AddHeader("Content-Disposition", string.Format("attachment; filename={0}.xls", DateTime.Now.ToString("yyyy-MM-dd-HH-mm-ss")));
response.Charset = "GB2312";
response.ContentEncoding = Encoding.GetEncoding("GB2312");
response.BinaryWrite(bytes);
response.Flush();
response.Close();
}Type 8: EPPlus
EPPlus is a .net library for reading and writing Excel 2007/2010 files using the Open Office Xml format (xlsx), and is free and open source.
Download address: http://epplus.codeplex.com/
The first way is to use file streaming to create an Excel file on the disk, then open the file to write data and save it.
public void ExportExcel(DataTable dt)
{
//新建一个 Excel 文件
string path = HttpContext.Current.Server.MapPath("Export/");
string filePath = path + DateTime.Now.ToString("yyyy-MM-dd-HH-mm-ss") + ".xlsx";
FileStream fileStream = new FileStream(filePath, FileMode.Create);
//加载这个 Excel 文件
ExcelPackage package = new ExcelPackage(fileStream);
// 添加一个 sheet 表
ExcelWorksheet worksheet = package.Workbook.Worksheets.Add(dt.TableName);
int rowIndex = 1; // 起始行为 1
int colIndex = 1; // 起始列为 1
//设置列名
for (int i = 0; i < dt.Columns.Count; i++)
{
worksheet.Cells[rowIndex, colIndex + i].Value = dt.Columns[i].ColumnName;
//自动调整列宽，也可以指定最小宽度和最大宽度
worksheet.Column(colIndex + i).AutoFit();
}
// 跳过第一列列名
rowIndex++;
//写入数据
for (int i = 0; i < dt.Rows.Count; i++)
{
for (int j = 0; j < dt.Columns.Count; j++)
{
worksheet.Cells[rowIndex + i, colIndex + j].Value = dt.Rows[i][j].ToString();
}
//自动调整行高
worksheet.Row(rowIndex + i).CustomHeight = true;
}
//设置字体，也可以是中文，比如：宋体
worksheet.Cells.Style.Font.Name = "Arial";
//字体加粗
worksheet.Cells.Style.Font.Bold = true;
//字体大小
worksheet.Cells.Style.Font.Size = 12;
//字体颜色
worksheet.Cells.Style.Font.Color.SetColor(System.Drawing.Color.Black);
//单元格背景样式，要设置背景颜色必须先设置背景样式
worksheet.Cells.Style.Fill.PatternType = ExcelFillStyle.Solid;
//单元格背景颜色
worksheet.Cells.Style.Fill.BackgroundColor.SetColor(System.Drawing.Color.DimGray);
//设置单元格所有边框样式和颜色
worksheet.Cells.Style.Border.BorderAround(ExcelBorderStyle.Thin, System.Drawing.ColorTranslator.FromHtml("#0097DD"));
//单独设置单元格四边框 Top、Bottom、Left、Right 的样式和颜色
//worksheet.Cells.Style.Border.Top.Style = ExcelBorderStyle.Thin;
//worksheet.Cells.Style.Border.Top.Color.SetColor(System.Drawing.Color.Black);
//垂直居中
worksheet.Cells.Style.VerticalAlignment = ExcelVerticalAlignment.Center;
//水平居中
worksheet.Cells.Style.HorizontalAlignment = ExcelHorizontalAlignment.Center;
//单元格是否自动换行
worksheet.Cells.Style.WrapText = false;
//设置单元格格式为文本
worksheet.Cells.Style.Numberformat.Format = "@";
//单元格自动适应大小
worksheet.Cells.Style.ShrinkToFit = true;
package.Save();
fileStream.Close();
fileStream.Dispose();
worksheet.Dispose();
package.Dispose();
}The second method is not to specify a file. After first creating an Excel workbook and writing the data, you can choose to save to the specified file (new file), save as a stream, and obtain the byte array output to the browser for download.
public void ExportExcel(DataTable dt)
{
//新建一个 Excel 工作簿
ExcelPackage package = new ExcelPackage();
// 添加一个 sheet 表
ExcelWorksheet worksheet = package.Workbook.Worksheets.Add(dt.TableName);
int rowIndex = 1; // 起始行为 1
int colIndex = 1; // 起始列为 1
//设置列名
for (int i = 0; i < dt.Columns.Count; i++)
{
worksheet.Cells[rowIndex, colIndex + i].Value = dt.Columns[i].ColumnName;
//自动调整列宽，也可以指定最小宽度和最大宽度
worksheet.Column(colIndex + i).AutoFit();
}
// 跳过第一列列名
rowIndex++;
//写入数据
for (int i = 0; i < dt.Rows.Count; i++)
{
for (int j = 0; j < dt.Columns.Count; j++)
{
worksheet.Cells[rowIndex + i, colIndex + j].Value = dt.Rows[i][j].ToString();
}
//自动调整行高
worksheet.Row(rowIndex + i).CustomHeight = true;
}
//设置字体，也可以是中文，比如：宋体
worksheet.Cells.Style.Font.Name = "Arial";
//字体加粗
worksheet.Cells.Style.Font.Bold = true;
//字体大小
worksheet.Cells.Style.Font.Size = 12;
//字体颜色
worksheet.Cells.Style.Font.Color.SetColor(System.Drawing.Color.Black);
//单元格背景样式，要设置背景颜色必须先设置背景样式
worksheet.Cells.Style.Fill.PatternType = ExcelFillStyle.Solid;
//单元格背景颜色
worksheet.Cells.Style.Fill.BackgroundColor.SetColor(System.Drawing.Color.DimGray);
//设置单元格所有边框样式和颜色
worksheet.Cells.Style.Border.BorderAround(ExcelBorderStyle.Thin, System.Drawing.ColorTranslator.FromHtml("#0097DD"));
//单独设置单元格四边框 Top、Bottom、Left、Right 的样式和颜色
//worksheet.Cells.Style.Border.Top.Style = ExcelBorderStyle.Thin;
//worksheet.Cells.Style.Border.Top.Color.SetColor(System.Drawing.Color.Black);
//垂直居中
worksheet.Cells.Style.VerticalAlignment = ExcelVerticalAlignment.Center;
//水平居中
worksheet.Cells.Style.HorizontalAlignment = ExcelHorizontalAlignment.Center;
//单元格是否自动换行
worksheet.Cells.Style.WrapText = false;
//设置单元格格式为文本
worksheet.Cells.Style.Numberformat.Format = "@";
//单元格自动适应大小
worksheet.Cells.Style.ShrinkToFit = true;
第一种保存方式
//string path1 = HttpContext.Current.Server.MapPath("Export/");
//string filePath1 = path1 + DateTime.Now.ToString("yyyy-MM-dd-HH-mm-ss") + ".xlsx";
//FileStream fileStream1 = new FileStream(filePath1, FileMode.Create);
保存至指定文件
//FileInfo fileInfo = new FileInfo(filePath1);
//package.SaveAs(fileInfo);
第二种保存方式
//string path2 = HttpContext.Current.Server.MapPath("Export/");
//string filePath2 = path2 + DateTime.Now.ToString("yyyy-MM-dd-HH-mm-ss") + ".xlsx";
//FileStream fileStream2 = new FileStream(filePath2, FileMode.Create);
写入文件流
//package.SaveAs(fileStream2);
//创建一个内存流，然后转换为字节数组，输出到浏览器下载
//MemoryStream ms = new MemoryStream();
//package.SaveAs(ms);
//byte[] bytes = ms.ToArray();
//也可以直接获取流
//Stream stream = package.Stream;
//也可以直接获取字节数组
byte[] bytes = package.GetAsByteArray();
//调用下面的方法输出到浏览器下载
OutputClient(bytes);
worksheet.Dispose();
package.Dispose();
}
public void ExportExcel(DataTable dt)
{
//新建一个 Excel 工作簿
ExcelPackage package = new ExcelPackage();
// 添加一个 sheet 表
ExcelWorksheet worksheet = package.Workbook.Worksheets.Add(dt.TableName);
int rowIndex = 1; // 起始行为 1
int colIndex = 1; // 起始列为 1
//设置列名
for (int i = 0; i < dt.Columns.Count; i++)
{
worksheet.Cells[rowIndex, colIndex + i].Value = dt.Columns[i].ColumnName;
//自动调整列宽，也可以指定最小宽度和最大宽度
worksheet.Column(colIndex + i).AutoFit();
}
// 跳过第一列列名
rowIndex++;
//写入数据
for (int i = 0; i < dt.Rows.Count; i++)
{
for (int j = 0; j < dt.Columns.Count; j++)
{
worksheet.Cells[rowIndex + i, colIndex + j].Value = dt.Rows[i][j].ToString();
}
//自动调整行高
worksheet.Row(rowIndex + i).CustomHeight = true;
}
//设置字体，也可以是中文，比如：宋体
worksheet.Cells.Style.Font.Name = "Arial";
//字体加粗
worksheet.Cells.Style.Font.Bold = true;
//字体大小
worksheet.Cells.Style.Font.Size = 12;
//字体颜色
worksheet.Cells.Style.Font.Color.SetColor(System.Drawing.Color.Black);
//单元格背景样式，要设置背景颜色必须先设置背景样式
worksheet.Cells.Style.Fill.PatternType = ExcelFillStyle.Solid;
//单元格背景颜色
worksheet.Cells.Style.Fill.BackgroundColor.SetColor(System.Drawing.Color.DimGray);
//设置单元格所有边框样式和颜色
worksheet.Cells.Style.Border.BorderAround(ExcelBorderStyle.Thin, System.Drawing.ColorTranslator.FromHtml("#0097DD"));
//单独设置单元格四边框 Top、Bottom、Left、Right 的样式和颜色
//worksheet.Cells.Style.Border.Top.Style = ExcelBorderStyle.Thin;
//worksheet.Cells.Style.Border.Top.Color.SetColor(System.Drawing.Color.Black);
//垂直居中
worksheet.Cells.Style.VerticalAlignment = ExcelVerticalAlignment.Center;
//水平居中
worksheet.Cells.Style.HorizontalAlignment = ExcelHorizontalAlignment.Center;
//单元格是否自动换行
worksheet.Cells.Style.WrapText = false;
//设置单元格格式为文本
worksheet.Cells.Style.Numberformat.Format = "@";
//单元格自动适应大小
worksheet.Cells.Style.ShrinkToFit = true;
第一种保存方式
//string path1 = HttpContext.Current.Server.MapPath("Export/");
//string filePath1 = path1 + DateTime.Now.ToString("yyyy-MM-dd-HH-mm-ss") + ".xlsx";
//FileStream fileStream1 = new FileStream(filePath1, FileMode.Create);
保存至指定文件
//FileInfo fileInfo = new FileInfo(filePath1);
//package.SaveAs(fileInfo);
第二种保存方式
//string path2 = HttpContext.Current.Server.MapPath("Export/");
//string filePath2 = path2 + DateTime.Now.ToString("yyyy-MM-dd-HH-mm-ss") + ".xlsx";
//FileStream fileStream2 = new FileStream(filePath2, FileMode.Create);
写入文件流
//package.SaveAs(fileStream2);
//创建一个内存流，然后转换为字节数组，输出到浏览器下载
//MemoryStream ms = new MemoryStream();
//package.SaveAs(ms);
//byte[] bytes = ms.ToArray();
//也可以直接获取流
//Stream stream = package.Stream;
//也可以直接获取字节数组
byte[] bytes = package.GetAsByteArray();
//调用下面的方法输出到浏览器下载
OutputClient(bytes);
worksheet.Dispose();
package.Dispose();
}This method can support Excel .xlsx format when creating files and outputting them to the browser for download. For more related property settings, please refer to:
http://www.cnblogs.com/rumeng/p/3785775.html
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