excel数据转换方法
本文关键字：转换方法 数据 excel | 更新日期: 2023-09-27 17:50:41
我正在寻找一种好方法来获取一组对象并将其转换为Excel格式。我过去使用过VSTO，但它没有很好的文档，而且我对许多命名约定和破坏性更改不满意。
我想也许做一个XSLT转换，但没有看到任何干净的方法从那里到Excel。我看到XSLT> HTML> Excel，但是我不知道…HTML是一个如此松散的标准，我不相信它能产生一致的数据转换。
你推荐什么?
我使用的代码可以在code Project网站上找到。
它创建一个xml文件，Excel将其理解为Excel工作簿。古怪的;当你打开它时，你会得到这样的消息:
您要打开的文件在其中指定的不同格式文件扩展名
它可以很好地打开，然后你可以将其保存为真正的excel格式。
查看代码，看起来创建多个工作表并不需要太多时间(我认为是您想要做的)。:)
如果由于某种原因链接无法加载，代码如下:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data;
using System.Reflection;
using System.Collections;
namespace myNamespace
{
public class IOProcess
{
//http://www.codeproject.com/KB/dotnet/ExportToExcel.aspx?df=100&forumid=146533&exp=0&select=1357703
public static void ExportToExcel(DataSet source, string fileName)
{
System.IO.StreamWriter excelDoc;
excelDoc = new System.IO.StreamWriter(fileName);
const string startExcelXML = "<xml version>'r'n<Workbook " +
"xmlns='"urn:schemas-microsoft-com:office:spreadsheet'"'r'n" +
" xmlns:o='"urn:schemas-microsoft-com:office:office'"'r'n " +
"xmlns:x='"urn:schemas- microsoft-com:office:" +
"excel'"'r'n xmlns:ss='"urn:schemas-microsoft-com:" +
"office:spreadsheet'">'r'n <Styles>'r'n " +
"<Style ss:ID='"Default'" ss:Name='"Normal'">'r'n " +
"<Alignment ss:Vertical='"Bottom'"/>'r'n <Borders/>" +
"'r'n <Font/>'r'n <Interior/>'r'n <NumberFormat/>" +
"'r'n <Protection/>'r'n </Style>'r'n " +
"<Style ss:ID='"BoldColumn'">'r'n <Font " +
"x:Family='"Swiss'" ss:Bold='"1'"/>'r'n </Style>'r'n " +
"<Style ss:ID='"StringLiteral'">'r'n <NumberFormat" +
" ss:Format='"@'"/>'r'n </Style>'r'n <Style " +
"ss:ID='"Decimal'">'r'n <NumberFormat " +
"ss:Format='"0.0000'"/>'r'n </Style>'r'n " +
"<Style ss:ID='"Integer'">'r'n <NumberFormat " +
"ss:Format='"0'"/>'r'n </Style>'r'n <Style " +
"ss:ID='"DateLiteral'">'r'n <NumberFormat " +
"ss:Format='"mm/dd/yyyy;@'"/>'r'n </Style>'r'n " +
"</Styles>'r'n ";
const string endExcelXML = "</Workbook>";
int rowCount = 0;
int sheetCount = 1;
/*
<xml version>
<Workbook xmlns="urn:schemas-microsoft-com:office:spreadsheet"
xmlns:o="urn:schemas-microsoft-com:office:office"
xmlns:x="urn:schemas-microsoft-com:office:excel"
xmlns:ss="urn:schemas-microsoft-com:office:spreadsheet">
<Styles>
<Style ss:ID="Default" ss:Name="Normal">
<Alignment ss:Vertical="Bottom"/>
<Borders/>
<Font/>
<Interior/>
<NumberFormat/>
<Protection/>
</Style>
<Style ss:ID="BoldColumn">
<Font x:Family="Swiss" ss:Bold="1"/>
</Style>
<Style ss:ID="StringLiteral">
<NumberFormat ss:Format="@"/>
</Style>
<Style ss:ID="Decimal">
<NumberFormat ss:Format="0.0000"/>
</Style>
<Style ss:ID="Integer">
<NumberFormat ss:Format="0"/>
</Style>
<Style ss:ID="DateLiteral">
<NumberFormat ss:Format="mm/dd/yyyy;@"/>
</Style>
</Styles>
<Worksheet ss:Name="Sheet1">
</Worksheet>
</Workbook>
*/
excelDoc.Write(startExcelXML);
excelDoc.Write("<Worksheet ss:Name='"Sheet" + sheetCount + "'">");
excelDoc.Write("<Table>");
excelDoc.Write("<Row>");
for (int x = 0; x < source.Tables[0].Columns.Count; x++)
{
excelDoc.Write("<Cell ss:StyleID='"BoldColumn'"><Data ss:Type='"String'">");
excelDoc.Write(source.Tables[0].Columns[x].ColumnName);
excelDoc.Write("</Data></Cell>");
}
excelDoc.Write("</Row>");
foreach (DataRow x in source.Tables[0].Rows)
{
rowCount++;
//if the number of rows is > 64000 create a new page to continue output
if (rowCount == 64000)
{
rowCount = 0;
sheetCount++;
excelDoc.Write("</Table>");
excelDoc.Write(" </Worksheet>");
excelDoc.Write("<Worksheet ss:Name='"Sheet" + sheetCount + "'">");
excelDoc.Write("<Table>");
}
excelDoc.Write("<Row>"); //ID=" + rowCount + "
for (int y = 0; y < source.Tables[0].Columns.Count; y++)
{
System.Type rowType;
rowType = x[y].GetType();
switch (rowType.ToString())
{
case "System.String":
string XMLstring = x[y].ToString();
XMLstring = XMLstring.Trim();
XMLstring = XMLstring.Replace("&", "&");
XMLstring = XMLstring.Replace(">", ">");
XMLstring = XMLstring.Replace("<", "<");
excelDoc.Write("<Cell ss:StyleID='"StringLiteral'">" +
"<Data ss:Type='"String'">");
excelDoc.Write(XMLstring);
excelDoc.Write("</Data></Cell>");
break;
case "System.DateTime":
//Excel has a specific Date Format of YYYY-MM-DD followed by
//the letter 'T' then hh:mm:sss.lll Example 2005-01-31T24:01:21.000
//The Following Code puts the date stored in XMLDate
//to the format above
DateTime XMLDate = (DateTime)x[y];
string XMLDatetoString = ""; //Excel Converted Date
XMLDatetoString = XMLDate.Year.ToString() +
"-" +
(XMLDate.Month < 10 ? "0" +
XMLDate.Month.ToString() : XMLDate.Month.ToString()) +
"-" +
(XMLDate.Day < 10 ? "0" +
XMLDate.Day.ToString() : XMLDate.Day.ToString()) +
"T" +
(XMLDate.Hour < 10 ? "0" +
XMLDate.Hour.ToString() : XMLDate.Hour.ToString()) +
":" +
(XMLDate.Minute < 10 ? "0" +
XMLDate.Minute.ToString() : XMLDate.Minute.ToString()) +
":" +
(XMLDate.Second < 10 ? "0" +
XMLDate.Second.ToString() : XMLDate.Second.ToString()) +
".000";
excelDoc.Write("<Cell ss:StyleID='"DateLiteral'">" +
"<Data ss:Type='"DateTime'">");
excelDoc.Write(XMLDatetoString);
excelDoc.Write("</Data></Cell>");
break;
case "System.Boolean":
excelDoc.Write("<Cell ss:StyleID='"StringLiteral'">" +
"<Data ss:Type='"String'">");
excelDoc.Write(x[y].ToString());
excelDoc.Write("</Data></Cell>");
break;
case "System.Int16":
case "System.Int32":
case "System.Int64":
case "System.Byte":
excelDoc.Write("<Cell ss:StyleID='"Integer'">" +
"<Data ss:Type='"Number'">");
excelDoc.Write(x[y].ToString());
excelDoc.Write("</Data></Cell>");
break;
case "System.Decimal":
case "System.Double":
excelDoc.Write("<Cell ss:StyleID='"Decimal'">" +
"<Data ss:Type='"Number'">");
excelDoc.Write(x[y].ToString());
excelDoc.Write("</Data></Cell>");
break;
case "System.DBNull":
excelDoc.Write("<Cell ss:StyleID='"StringLiteral'">" +
"<Data ss:Type='"String'">");
excelDoc.Write("");
excelDoc.Write("</Data></Cell>");
break;
default:
throw (new Exception(rowType.ToString() + " not handled."));
}
}
excelDoc.Write("</Row>");
}
excelDoc.Write("</Table>");
excelDoc.Write(" </Worksheet>");
excelDoc.Write(endExcelXML);
excelDoc.Close();
}
#region Convert to Dataset
/// <summary>
/// This will take anything that implements the ICollection interface and convert
/// it to a DataSet.
/// </summary>
/// <example>
/// CollectiontoDataSet converter = new CollectionToDataSet<Letters[]>(letters);
/// DataSet ds = converter.CreateDataSet();
/// </example>
/// <typeparam name="T"></typeparam>
public class CollectionToDataSet<T> where T : System.Collections.ICollection
{
T _collection;
public CollectionToDataSet(T list)
{
_collection = list;
}
private PropertyInfo[] _propertyCollection = null;
private PropertyInfo[] PropertyCollection
{
get
{
if (_propertyCollection == null)
{
_propertyCollection = GetPropertyCollection();
}
return _propertyCollection;
}
}
private PropertyInfo[] GetPropertyCollection()
{
if (_collection.Count > 0)
{
IEnumerator enumerator = _collection.GetEnumerator();
enumerator.MoveNext();
return enumerator.Current.GetType().GetProperties();
}
return null;
}
public DataSet CreateDataSet()
{
DataSet ds = new DataSet("GridDataSet");
ds.Tables.Add(FillDataTable());
return ds;
}
private DataTable FillDataTable()
{
IEnumerator enumerator = _collection.GetEnumerator();
DataTable dt = CreateDataTable();
while (enumerator.MoveNext())
{
dt.Rows.Add(FillDataRow(dt.NewRow(), enumerator.Current));
}
return dt;
}
private DataRow FillDataRow(DataRow dataRow, object p)
{
foreach (PropertyInfo property in PropertyCollection)
{
dataRow[property.Name.ToString()] = property.GetValue(p, null);
}
return dataRow;
}
private DataTable CreateDataTable()
{
DataTable dt = new DataTable("GridDataTable");
foreach (PropertyInfo property in PropertyCollection)
{
dt.Columns.Add(property.Name.ToString());
}
return dt;
}
}
#endregion Convert to Dataset
}
}