c#(WinForms-App)将DataSet导出到Excel

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......

非常感谢提前

我创建了一个导出一个DataGridView或DataTable一个Excel文件的类.您可以稍微更改它以使其使用您的DataSet代替(迭代DataTables它).它还会执行一些基本的格式化,您也可以扩展它们.

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.随意地.

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a XmlWriter,它将为你逃脱.

该ExcelWriter课程包括一个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}\">{0:yyyy\\-MM\\-dd\\THH\\:mm\\:ss\\.fff}", value,

        _writer.WriteEndElement();
        _writer.WriteEndElement();
    }

    public void WriteExcelAutoStyledCell(object value)
    {
        if (_writer == null) throw new InvalidOperationException("Cannot write after closing.");

        //write the  and  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DataTable使用以下内容导出您:

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);
        }
    }
}