我需要一个解决方案来将数据集导出到excel文件而不需要任何asp代码（HttpResonpsne ...）但我没有找到一个很好的例子来做到这一点......
提前致谢
答案 0 :(得分：36)
我创建了一个将DataGridView或DataTable导出到Excel文件的类。您可以稍微更改它以使其使用DataSet代替（遍历其中的DataTables）。它还可以进行一些基本格式化，也可以扩展。
要使用它，只需调用ExcelExport，并指定文件名以及导出后是否自动打开文件。我也可以让它们成为扩展方法，但我没有。随意。
请注意，Excel文件可以保存为美化的XML文档，并且可以使用它。
编辑：这曾经使用过香草StreamWriter，但正如所指出的，在许多情况下，事情不会被正确转义。现在它使用了XmlWriter，它将为您进行转义。
ExcelWriter类封装XmlWriter。我没有打扰，但您可能想要进行更多的错误检查，以确保在开始行之前无法写入单元格数据，等等。代码如下。
public class ExcelWriter : IDisposable
{
private XmlWriter _writer;
public enum CellStyle { General, Number, Currency, DateTime, ShortDate };
public void WriteStartDocument()
{
if (_writer == null) throw new InvalidOperationException("Cannot write after closing.");
_writer.WriteProcessingInstruction("mso-application", "progid=\"Excel.Sheet\"");
_writer.WriteStartElement("ss", "Workbook", "urn:schemas-microsoft-com:office:spreadsheet");
WriteExcelStyles();
}
public void WriteEndDocument()
{
if (_writer == null) throw new InvalidOperationException("Cannot write after closing.");
_writer.WriteEndElement();
}
private void WriteExcelStyleElement(CellStyle style)
{
_writer.WriteStartElement("Style", "urn:schemas-microsoft-com:office:spreadsheet");
_writer.WriteAttributeString("ID", "urn:schemas-microsoft-com:office:spreadsheet", style.ToString());
_writer.WriteEndElement();
}
private void WriteExcelStyleElement(CellStyle style, string NumberFormat)
{
_writer.WriteStartElement("Style", "urn:schemas-microsoft-com:office:spreadsheet");
_writer.WriteAttributeString("ID", "urn:schemas-microsoft-com:office:spreadsheet", style.ToString());
_writer.WriteStartElement("NumberFormat", "urn:schemas-microsoft-com:office:spreadsheet");
_writer.WriteAttributeString("Format", "urn:schemas-microsoft-com:office:spreadsheet", NumberFormat);
_writer.WriteEndElement();
_writer.WriteEndElement();
}
private void WriteExcelStyles()
{
_writer.WriteStartElement("Styles", "urn:schemas-microsoft-com:office:spreadsheet");
WriteExcelStyleElement(CellStyle.General);
WriteExcelStyleElement(CellStyle.Number, "General Number");
WriteExcelStyleElement(CellStyle.DateTime, "General Date");
WriteExcelStyleElement(CellStyle.Currency, "Currency");
WriteExcelStyleElement(CellStyle.ShortDate, "Short Date");
_writer.WriteEndElement();
}
public void WriteStartWorksheet(string name)
{
if (_writer == null) throw new InvalidOperationException("Cannot write after closing.");
_writer.WriteStartElement("Worksheet", "urn:schemas-microsoft-com:office:spreadsheet");
_writer.WriteAttributeString("Name", "urn:schemas-microsoft-com:office:spreadsheet", name);
_writer.WriteStartElement("Table", "urn:schemas-microsoft-com:office:spreadsheet");
}
public void WriteEndWorksheet()
{
if (_writer == null) throw new InvalidOperationException("Cannot write after closing.");
_writer.WriteEndElement();
_writer.WriteEndElement();
}
public ExcelWriter(string outputFileName)
{
XmlWriterSettings settings = new XmlWriterSettings();
settings.Indent = true;
_writer = XmlWriter.Create(outputFileName, settings);
}
public void Close()
{
if (_writer == null) throw new InvalidOperationException("Already closed.");
_writer.Close();
_writer = null;
}
public void WriteExcelColumnDefinition(int columnWidth)
{
if (_writer == null) throw new InvalidOperationException("Cannot write after closing.");
_writer.WriteStartElement("Column", "urn:schemas-microsoft-com:office:spreadsheet");
_writer.WriteStartAttribute("Width", "urn:schemas-microsoft-com:office:spreadsheet");
_writer.WriteValue(columnWidth);
_writer.WriteEndAttribute();
_writer.WriteEndElement();
}
public void WriteExcelUnstyledCell(string value)
{
if (_writer == null) throw new InvalidOperationException("Cannot write after closing.");
_writer.WriteStartElement("Cell", "urn:schemas-microsoft-com:office:spreadsheet");
_writer.WriteStartElement("Data", "urn:schemas-microsoft-com:office:spreadsheet");
_writer.WriteAttributeString("Type", "urn:schemas-microsoft-com:office:spreadsheet", "String");
_writer.WriteValue(value);
_writer.WriteEndElement();
_writer.WriteEndElement();
}
public void WriteStartRow()
{
if (_writer == null) throw new InvalidOperationException("Cannot write after closing.");
_writer.WriteStartElement("Row", "urn:schemas-microsoft-com:office:spreadsheet");
}
public void WriteEndRow()
{
if (_writer == null) throw new InvalidOperationException("Cannot write after closing.");
_writer.WriteEndElement();
}
public void WriteExcelStyledCell(object value, CellStyle style)
{
if (_writer == null) throw new InvalidOperationException("Cannot write after closing.");
_writer.WriteStartElement("Cell", "urn:schemas-microsoft-com:office:spreadsheet");
_writer.WriteAttributeString("StyleID", "urn:schemas-microsoft-com:office:spreadsheet", style.ToString());
_writer.WriteStartElement("Data", "urn:schemas-microsoft-com:office:spreadsheet");
switch (style)
{
case CellStyle.General:
_writer.WriteAttributeString("Type", "urn:schemas-microsoft-com:office:spreadsheet", "String");
break;
case CellStyle.Number:
case CellStyle.Currency:
_writer.WriteAttributeString("Type", "urn:schemas-microsoft-com:office:spreadsheet", "Number");
break;
case CellStyle.ShortDate:
case CellStyle.DateTime:
_writer.WriteAttributeString("Type", "urn:schemas-microsoft-com:office:spreadsheet", "DateTime");
break;
}
_writer.WriteValue(value);
// tag += String.Format("{1}\"><ss:Data ss:Type=\"DateTime\">{0:yyyy\\-MM\\-dd\\THH\\:mm\\:ss\\.fff}</ss:Data>", value,
_writer.WriteEndElement();
_writer.WriteEndElement();
}
public void WriteExcelAutoStyledCell(object value)
{
if (_writer == null) throw new InvalidOperationException("Cannot write after closing.");
//write the <ss:Cell> and <ss:Data> tags for something
if (value is Int16 || value is Int32 || value is Int64 || value is SByte ||
value is UInt16 || value is UInt32 || value is UInt64 || value is Byte)
{
WriteExcelStyledCell(value, CellStyle.Number);
}
else if (value is Single || value is Double || value is Decimal) //we'll assume it's a currency
{
WriteExcelStyledCell(value, CellStyle.Currency);
}
else if (value is DateTime)
{
//check if there's no time information and use the appropriate style
WriteExcelStyledCell(value, ((DateTime)value).TimeOfDay.CompareTo(new TimeSpan(0, 0, 0, 0, 0)) == 0 ? CellStyle.ShortDate : CellStyle.DateTime);
}
else
{
WriteExcelStyledCell(value, CellStyle.General);
}
}
#region IDisposable Members
public void Dispose()
{
if (_writer == null)
return;
_writer.Close();
_writer = null;
}
#endregion
}
然后，您可以使用以下内容导出DataTable：
public static void ExcelExport(DataTable data, String fileName, bool openAfter)
{
//export a DataTable to Excel
DialogResult retry = DialogResult.Retry;
while (retry == DialogResult.Retry)
{
try
{
using (ExcelWriter writer = new ExcelWriter(fileName))
{
writer.WriteStartDocument();
// Write the worksheet contents
writer.WriteStartWorksheet("Sheet1");
//Write header row
writer.WriteStartRow();
foreach (DataColumn col in data.Columns)
writer.WriteExcelUnstyledCell(col.Caption);
writer.WriteEndRow();
//write data
foreach (DataRow row in data.Rows)
{
writer.WriteStartRow();
foreach (object o in row.ItemArray)
{
writer.WriteExcelAutoStyledCell(o);
}
writer.WriteEndRow();
}
// Close up the document
writer.WriteEndWorksheet();
writer.WriteEndDocument();
writer.Close();
if (openAfter)
OpenFile(fileName);
retry = DialogResult.Cancel;
}
}
catch (Exception myException)
{
retry = MessageBox.Show(myException.Message, "Excel Export", MessageBoxButtons.RetryCancel, MessageBoxIcon.Asterisk);
}
}
}
答案 1 :(得分：3)
以下网站演示了如何将DataSet（或DataTable或List＆lt;＆gt;）导出到“正版”Excel 2007 .xlsx文件中。
它使用 OpenXML 库，因此不需要在服务器上安装Excel。
MikesKnowledgeBase - ExportToExcel
提供所有源代码，免费，以及演示应用程序。
非常很容易添加到您自己的应用程序中，您只需要调用一个函数，传入Excel文件名和数据源：
DataSet ds = CreateSampleData();
string excelFilename = "C:\\Sample.xlsx";
CreateExcelFile.CreateExcelDocument(ds, excelFilename);
希望这有帮助。
答案 2 :(得分：1)
答案 3 :(得分：1)
using XL = Microsoft.Office.Interop.Excel;
using System.Reflection;
public static void Datasource(DataTable dt)
{
XL.Application oXL;
XL._Workbook oWB;
XL._Worksheet oSheet;
XL.Range oRng;
try
{
oXL = new XL.Application();
Application.DoEvents();
oXL.Visible = false;
//Get a new workbook.
oWB = (XL._Workbook)(oXL.Workbooks.Add(Missing.Value));
oSheet = (XL._Worksheet)oWB.ActiveSheet;
//System.Data.DataTable dtGridData=ds.Tables[0];
int iRow = 2;
if (dt.Rows.Count > 0)
{
for (int j = 0; j < dt.Columns.Count; j++)
{
oSheet.Cells[1, j + 1] = dt.Columns[j].ColumnName;
}
// For each row, print the values of each column.
for (int rowNo = 0; rowNo < dt.Rows.Count; rowNo++)
{
for (int colNo = 0; colNo < dt.Columns.Count; colNo++)
{
oSheet.Cells[iRow, colNo + 1] = dt.Rows[rowNo][colNo].ToString();
}
iRow++;
}
iRow++;
}
oRng = oSheet.get_Range("A1", "IV1");
oRng.EntireColumn.AutoFit();
oXL.Visible = true;
}
catch (Exception theException)
{
throw theException;
}
finally
{
oXL = null;
oWB = null;
oSheet = null;
oRng = null;
}
}
从Excel导入数据表：
DataTable dtTable = new DataTable();
DataColumn col = new DataColumn("Rfid");
dtTable.Columns.Add(col);
DataRow drRow;
Microsoft.Office.Interop.Excel.Application ExcelObj =
new Microsoft.Office.Interop.Excel.Application();
Microsoft.Office.Interop.Excel.Workbook theWorkbook =
ExcelObj.Workbooks.Open(txt_FilePath.Text, Type.Missing, Type.Missing, Type.Missing, Type.Missing,
Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing,
Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing);
Microsoft.Office.Interop.Excel.Sheets sheets = theWorkbook.Worksheets;
try
{
for (int sht = 1; sht <= sheets.Count; sht++)
{
Microsoft.Office.Interop.Excel.Worksheet worksheet =
(Microsoft.Office.Interop.Excel.Worksheet)sheets.get_Item(sht);
for (int i = 2; i <= worksheet.UsedRange.Rows.Count; i++)
{
Microsoft.Office.Interop.Excel.Range range = worksheet.get_Range("A" + i.ToString(), "B" + i.ToString());
System.Array myvalues = (System.Array)range.Cells.Value2;
String name = Convert.ToString(myvalues.GetValue(1, 1));
if (string.IsNullOrEmpty(name) == false)
{
drRow = dtTable.NewRow();
drRow["Rfid"] = name;
dtTable.Rows.Add(drRow);
}
}
Marshal.ReleaseComObject(worksheet);
worksheet = null;
}
return dtTable;
}
catch
{
throw;
}
finally
{
// Marshal.ReleaseComObject(worksheet);
Marshal.ReleaseComObject(sheets);
Marshal.ReleaseComObject(theWorkbook);
Marshal.ReleaseComObject(ExcelObj);
//worksheet = null;
sheets = null;
theWorkbook = null;
ExcelObj = null;
}
答案 4 :(得分：1)
这篇文章有一个非常有用的答案，但我发现它缺乏，因为没有简单的方法将XML文件导回到数据表中。我最后不得不写自己的，并认为我会在这里分享它，以防其他人在同一条船上（谷歌在这方面特别无益）：
public static DataTable ImportExcelXML(string Filename)
{
//create a new dataset to load in the XML file
DataSet DS = new DataSet();
//Read the XML file into the dataset
DS.ReadXml(Filename);
//Create a new datatable to store the raw Data
DataTable Raw = new DataTable();
//assign the raw data from the file to the datatable
Raw = DS.Tables["Data"];
//count the number of columns in the XML file
int ColumnNumber = Raw.Columns.Count;
//create a datatable to store formatted Import Data
DataTable ImportData = new DataTable();
//create a string list to store the cell data of each row
List<string> RowData = new List<string>();
//loop through each row in the raw data table
for (int Counter = 0; Counter < Raw.Rows.Count; Counter++)
{
//if the data in the row is a colum header
if (Counter < ColumnNumber)
{
//add the column name to our formatted datatable
ImportData.Columns.Add(Raw.Rows[Counter].ItemArray.GetValue(1).ToString());
}
else
{
//if the row # (1 row = 1 cell from the excel file) from the raw datatable is divisable evenly by the number of columns in the formated import datatable AND this is not the 1st row of the raw table data after the headers
if ((Counter % ColumnNumber == 0) && (Counter != ColumnNumber))
{
//add the row we just built to the formatted import datatable
ImportData.Rows.Add(GenerateRow(ImportData, RowData));
//clear rowdata list in preperation for the next row
RowData.Clear();
}
//add the current cell data value from the raw datatable to the string list of cell values for the next row to be added to the formatted input datatable
RowData.Add(Raw.Rows[Counter].ItemArray.GetValue(1).ToString());
}
}
//add the final row
ImportData.Rows.Add(GenerateRow(ImportData, RowData));
return ImportData;
}
public static DataRow GenerateRow(DataTable ImportData, List<string> RowData)
{
//create a counter to keep track of the column position during row composition
int ColumnPosition = 0;
//make a new datarow based on the schema of the formated import datatable
DataRow NewRow = ImportData.NewRow();
//for each string cell value collected for the RowData list for this row
foreach (string CellData in RowData)
{
//add the cell value to the new datarow
NewRow[ImportData.Columns[ColumnPosition].ColumnName] = CellData;
//incriment column position in the new row
ColumnPosition++;
}
//return the generated row
return NewRow;
}
答案 5 :(得分：1)
代码存在空值问题。
public void WriteExcelAutoStyledCell(object value)
{
//solve null values
if (value is DBNull) return;
答案 6 :(得分：1)
我会将此添加到评论中，但我是新手，因此我无法发表评论。使用lc。的解决方案我添加了另一个函数来测试无效XML字符的字符串字符。当我偶尔导出到excel时，发现导致导出失败的字符。
您需要修改lc代码中的一个函数。
public void WriteExcelAutoStyledCell(object value)
{
if (_writer == null) throw new InvalidOperationException("Cannot write after closing.");
string newValue = string.Empty;
try
{
//write the <ss:Cell> and <ss:Data> tags for something
if (value is Int16 || value is Int32 || value is Int64 || value is SByte ||
value is UInt16 || value is UInt32 || value is UInt64 || value is Byte)
{
WriteExcelStyledCell(value, CellStyle.Number);
}
else if (value is Single || value is Double || value is Decimal) //we'll assume it's a currency
{
WriteExcelStyledCell(value, CellStyle.Currency);
}
else if (value is DateTime)
{
//check if there's no time information and use the appropriate style
WriteExcelStyledCell(value, ((DateTime)value).TimeOfDay.CompareTo(new TimeSpan(0, 0, 0, 0, 0)) == 0 ? CellStyle.ShortDate : CellStyle.DateTime);
}
else
{
newValue = CheckXmlCompatibleValues(value.ToString()).ToString();
WriteExcelStyledCell(newValue, CellStyle.General);
}
}
catch (Exception thisException)
{
throw new InvalidOperationException(thisException.Message.ToString());
}
}
将此功能添加到“ExcelWriter”类
public string CheckXmlCompatibleValues(string value)
{
string newValue = string.Empty;
bool found = false;
foreach (char c in value)
{
if (XmlConvert.IsXmlChar(c))
newValue += c.ToString();
else
found = true;
}
return newValue.ToString();
}
LC。谢谢您的代码！
答案 7 :(得分：0)
Microsoft提供了用于导入/导出Excel文件的内置解决方案。它不是最简单的库，但它通常比上面列出的其他库更好。
执行此操作所需的库包含在Office中，可以在Microsoft.Office.Interop.Excel的Framework程序集列表下找到。
以下是一些示例代码：
cmd.exe