新版本的xlsx是使用新的存儲格式，貌似是處理過的XML。
對于OpenXML我網上搜了一下，很多人沒有介紹。所以我就這里推薦下，相信會成為信息系統開發的必備。
先寫出個例子，會發現如此的簡介：
namespace XFormular.test
{
class Class1
{
public void test()
{
DataTable table = new DataTable("1");
table.Columns.Add("2");
for (int i = 0; i < 10; i++)
{
DataRow row = table.NewRow();
row[0] = i;
table.Rows.Add(row);
}
List<DataTable> lsit = new List<DataTable>();
lsit.Add(table);
OpenXmlSDKExporter.Export(AppDomain.CurrentDomain.BaseDirectory + "http://excel.xlsx", lsit);
}
}
}
寫出代碼
namespace XFormular
{
class OpenXmlSDKExporter
{
private static string[] Level = {"A", "B", "C", "D", "E", "F", "G",
"H", "I", "G", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T",
"U", "V", "W", "X", "Y", "Z" };
public static List<DataTable> Import(string path)
{
List<DataTable> tables = new List<DataTable>();
if (path.EndsWith(ExcelHelper.POSTFIX_SVN))
return tables;
using (MemoryStream stream = SpreadsheetReader.StreamFromFile(path))
{
using (SpreadsheetDocument doc = SpreadsheetDocument.Open(stream, true))
{
foreach (Sheet sheet in doc.WorkbookPart.Workbook.Descendants<Sheet>())
{
DataTable table = new DataTable(sheet.Name.Value);
WorksheetPart worksheet = (WorksheetPart)doc.WorkbookPart.GetPartById(sheet.Id);
List<string> columnsNames = new List<string>();
foreach (Row row in worksheet.Worksheet.Descendants<Row>())
{
foreach (Cell cell in row)
{
string columnName = Regex.Match(cell.CellReference.Value, "[a-zA-Z]+").Value;
if (!columnsNames.Contains(columnName))
{
columnsNames.Add(columnName);
}
}
}
columnsNames.Sort(CompareColumn);
foreach (string columnName in columnsNames)
{
table.Columns.Add(columnName);
}
foreach (Row row in worksheet.Worksheet.Descendants<Row>())
{
DataRow tableRow = table.NewRow();
table.Rows.Add(tableRow);
foreach (Cell cell in row)
{
string columnName = Regex.Match(cell.CellReference.Value, "[a-zA-Z]+").Value;
tableRow[columnName] = GetValue(cell, doc.WorkbookPart.SharedStringTablePart);
}
}
if (table.Rows.Count <= 0)
continue;
if (table.Columns.Count <= 0)
continue;
tables.Add(table);
}
}
}
return tables;
}
public static String GetValue(Cell cell, SharedStringTablePart stringTablePart)
{
if (cell.ChildElements.Count == 0)
return null;
//get cell value
String value = cell.CellValue.InnerText;
//Look up real value from shared string table
if ((cell.DataType != null) && (cell.DataType == CellValues.SharedString))
value = stringTablePart.SharedStringTable
.ChildElements[Int32.Parse(value)]
.InnerText;
return value;
}
public static void Export(string path, List<DataTable> tables)
{
using (MemoryStream stream = SpreadsheetReader.Create())
{
using (SpreadsheetDocument doc = SpreadsheetDocument.Open(stream, true))
{
SpreadsheetWriter.RemoveWorksheet(doc, "Sheet1");
SpreadsheetWriter.RemoveWorksheet(doc, "Sheet2");
SpreadsheetWriter.RemoveWorksheet(doc, "Sheet3");
foreach (DataTable table in tables)
{
WorksheetPart sheet = SpreadsheetWriter.InsertWorksheet(doc, table.TableName);
WorksheetWriter writer = new WorksheetWriter(doc, sheet);
SpreadsheetStyle style = SpreadsheetStyle.GetDefault(doc);
foreach (DataRow row in table.Rows)
{
for (int i = 0; i < table.Columns.Count; i++)
{
string columnName = SpreadsheetReader.GetColumnName("A", i);
string location = columnName + (table.Rows.IndexOf(row) + 1);
writer.PasteText(location, row[i].ToString(), style);
}
}
writer.Save();
}
SpreadsheetWriter.StreamToFile(path, stream);//保存到文件中
}
}
}
private static int CompareColumn(string x, string y)
{
int xIndex = Letter_to_num(x);
int yIndex = Letter_to_num(y);
return xIndex.CompareTo(yIndex);
}
/// <summary>
/// 數字26進制，轉換成字母，用遞歸算法
/// </summary>
/// <param name="value"></param>
/// <returns></returns>
private static string Num_to_letter(int value)
{
//此處判斷輸入的是否是正確的數字，略（正在表達式判斷）
int remainder = value % 26;
//remainder = (remainder == 0) ? 26 : remainder;
int front = (value - remainder) / 26;
if (front < 26)
{
return Level[front - 1] + Level[remainder];
}
else
{
return Num_to_letter(front) + Level[remainder];
}
//return "";
}
/// <summary>
/// 26進制字母轉換成數字
/// </summary>
/// <param name="letter"></param>
/// <returns></returns>
private static int Letter_to_num(string str)
{
//此處判斷是否是由A-Z字母組成的字符串，略（正在表達式片段）
char[] letter = str.ToCharArray(); //拆分字符串
int reNum = 0;
int power = 1; //用于次方算值
int times = 1; //最高位需要加1
int num = letter.Length;//得到字符串個數
//得到最后一個字母的尾數值
reNum += Char_num(letter[num - 1]);
//得到除最后一個字母的所以值,多于兩位才執行這個函數
if (num >= 2)
{
for (int i = num - 1; i > 0; i--)
{
power = 1;//致1，用于下一次循環使用次方計算
for (int j = 0; j < i; j++) //冪，j次方，應該有函數
{
power *= 26;
}
reNum += (power * (Char_num(letter[num - i - 1]) + times)); //最高位需要加1，中間位數不需要加一
times = 0;
}
}
//Console.WriteLine(letter.Length);
return reNum;
}
/// <summary>
/// 輸入字符得到相應的數字，這是最笨的方法，還可用ASIICK編碼；
/// </summary>
/// <param name="ch"></param>
/// <returns></returns>
private static int Char_num(char ch)
{
switch (ch)
{
case 'A':
return 0;
case 'B':
return 1;
case 'C':
return 2;
case 'D':
return 3;
case 'E':
return 4;
case 'F':
return 5;
case 'G':
return 6;
case 'H':
return 7;
case 'I':
return 8;
case 'J':
return 9;
case 'K':
return 10;
case 'L':
return 11;
case 'M':
return 12;
case 'N':
return 13;
case 'O':
return 14;
case 'P':
return 15;
case 'Q':
return 16;
case 'R':
return 17;
case 'S':
return 18;
case 'T':
return 19;
case 'U':
return 20;
case 'V':
return 21;
case 'W':
return 22;
case 'X':
return 23;
case 'Y':
return 24;
case 'Z':
return 25;
}
return -1;
}
}
}
namespace xtar_biz_codegen
{
class ExcelHelper
{
public static string POSTFIX_97 = "XLS";
public static string POSTFIX_03 = "XLSX";
}
}
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