1.引入類庫C1.C1Excel.2.dll
2.建立2個實體類，只要拷貝就可以。
A。XlsMapEntry 數據庫表字段與excell 標題對應類
代碼如下：
View Code
[Serializable]
public struct XlsMapEntry
{
private string excelColumn;
private string tableColumn;
public string ExcelColumn
{
get { return this.excelColumn; }
set { this.excelColumn = value; }
}
public string TableColumn
{
get { return this.tableColumn; }
set { this.tableColumn = value; }
}
public XlsMapEntry(string excelColumn, string tableColumn)
{
this.excelColumn = excelColumn;
this.tableColumn = tableColumn;
}
}
B.建立一個集合類，用於放這些實體
代碼如下：
View Code
public class XlsMapDictionary : IEnumerable
{
private List<XlsMapEntry> items;
private Int32 ItemsInUse = 0;
public XlsMapDictionary()
{
items = new List<XlsMapEntry>();
}
public bool IsReadOnly { get { return false; } }
public bool Contains(string tableColumn)
{
Int32 index;
return TryGetIndexOfKey(tableColumn, out index);
}
public bool IsFixedSize { get { return false; } }
public void Remove(string tableColumn)
{
if (tableColumn.Equals(string.Empty)) throw new ArgumentNullException("control");
Int32 index;
if (TryGetIndexOfKey(tableColumn, out index))
{
items.RemoveAt(index);
ItemsInUse--;
}
else
{
}
}
public void Clear()
{
items.Clear();
ItemsInUse = 0;
}
public void Add(string excelColumn, string tableColumn)
{
items.Add(new XlsMapEntry(excelColumn, tableColumn));
ItemsInUse++;
}
public ICollection ExcelColumns
{
get
{
Object[] excelColumns = new Object[ItemsInUse];
for (Int32 n = 0; n < ItemsInUse; n++)
excelColumns[n] = items[n].ExcelColumn;
return excelColumns;
}
}
public ICollection TableColumns
{
get
{
Object[] tableColumns = new Object[ItemsInUse];
for (Int32 n = 0; n < ItemsInUse; n++)
tableColumns[n] = items[n].TableColumn;
return tableColumns;
}
}
public object this[int index]
{
get
{
return items[index];
}
set
{
}
}
private Boolean TryGetIndexOfKey(string tableColumn, out Int32 index)
{
for (index = 0; index < ItemsInUse; index++)
{
if (items[index].TableColumn.Equals(tableColumn)) return true;
}
return false;
}
private class XlsMapDictionaryEnumerator : IEnumerator
{
XlsMapEntry[] items;
Int32 index = -1;
public XlsMapDictionaryEnumerator(XlsMapDictionary xmd)
{
items = new XlsMapEntry[xmd.Count];
xmd.items.CopyTo(items);
}
public Object Current { get { XlsMapIndex(); return items[index]; } }
public XlsMapEntry Entry
{
get { return (XlsMapEntry)Current; }
}
public Object ExcelColumn { get { XlsMapIndex(); return items[index].ExcelColumn; } }
public Object TableColumn { get { XlsMapIndex(); return items[index].TableColumn; } }
public Boolean MoveNext()
{
if (index < items.Length - 1) { index++; return true; }
return false;
}
private void XlsMapIndex()
{
if (index < 0 || index >= items.Length)
throw new InvalidOperationException("Enumerator is before or after the collection.");
}
public void Reset()
{
index = -1;
}
}
public IEnumerator GetEnumerator()
{
return new XlsMapDictionaryEnumerator(this);
}
#region ICollection Members
public bool IsSynchronized { get { return false; } }
public object SyncRoot { get { throw new NotImplementedException(); } }
public int Count { get { return ItemsInUse; } }
public void CopyTo(List<XlsMapEntry> xme, int index)
{
XlsMapEntry[] array = new XlsMapEntry[xme.Count];
xme.CopyTo(array);
}
#endregion
#region IEnumerable Members
IEnumerator IEnumerable.GetEnumerator()
{
return ((XlsMapDictionary)this).GetEnumerator();
}
#endregion
}
3.建立一個操作類ExcellToFile
代碼如下：
View Code
class ExcellToFile
{
/// <summary>
/// 產生Excel文檔
/// </summary>
/// <param name="dataset">資料來源</param>
public static string WriteExcel(DataSet dataSet, XlsMapDictionary xlsMapDictionary, string fullPath)
{
C1XLBook xlsBook = new C1XLBook();
int intMaxExcelCount = ExcelMax();
try
{
if (dataSet != null)
{
for (int i = 0; i < dataSet.Tables.Count; i++)
{
DataTable dataTable = dataSet.Tables[i];
XLSheet xlsSheet = xlsBook.Sheets[i];
XLStyle xlsStyle = new XLStyle(xlsBook);
// Header
int j = 0;
foreach (XlsMapEntry entry in xlsMapDictionary)
{
xlsSheet[i, j].Value = entry.ExcelColumn;
xlsStyle.BackColor = System.Drawing.Color.LightGray;
xlsSheet[i, j].Style = xlsStyle;
j++;
}
// Context
int y = 1;
int intMaxRow = 0;
foreach (DataRow dataRow in dataTable.Rows)
{
intMaxRow += 1;
if (intMaxRow > intMaxExcelCount)
{
break;
}
int x = 0;
foreach (XlsMapEntry entry in xlsMapDictionary)
{
if (dataTable.Columns[entry.TableColumn].DataType == typeof(DateTime))
{
if (dataRow[entry.TableColumn] != DBNull.Value)
xlsSheet[y, x].Value = Convert.ToDateTime(dataRow[entry.TableColumn]).ToString("yyyy/MM/dd HH:mm:ss");
else
xlsSheet[y, x].Value = "";
}
else
{
xlsSheet[y, x].Value = dataRow[entry.TableColumn];
}
x++;
}
y++;
}
AutoSizeExcelColumns(xlsSheet);
}
}
xlsBook.Save(fullPath);
}
catch (Exception ex)
{
throw ex;
}
return fullPath;
}
/// <summary>
/// 調整Excel中每欄的最適寬度www.2cto.com
/// </summary>
/// <param name="sheet">來源Excel</param>
private static void AutoSizeExcelColumns(XLSheet sheet)
{
using (System.Drawing.Graphics graphics = System.Drawing.Graphics.FromHwnd(IntPtr.Zero))
{
for (int c = 0; c < sheet.Columns.Count; c++)
{
int colWidth = -1;
for (int r = 0; r < sheet.Rows.Count; r++)
{
object value = sheet[r, c].Value;
if (value != null)
{
// get value (unformatted at this point)
string text = value.ToString();
// format value if cell has a style with format set
XLStyle s = sheet[r, c].Style;
if (s != null && s.Format.Length > 0 && value is IFormattable)
{
string fmt = XLStyle.FormatXLToDotNet(s.Format);
text = ((IFormattable)value).ToString(fmt, System.Globalization.CultureInfo.CurrentCulture);
}
// get font (default or style)
System.Drawing.Font font = sheet.Book.DefaultFont;
if (s != null && s.Font != null)
font = s.Font;
// measure string (add a little tolerance)
System.Drawing.Size sz = System.Drawing.Size.Ceiling(graphics.MeasureString(text + "x", font));
// keep widest so far
if (sz.Width > colWidth)
colWidth = sz.Width;
}
}
// done measuring, set column width
if (colWidth > -1)
sheet.Columns[c].Width = C1XLBook.PixelsToTwips(colWidth);
}
}
}
/// <summary>
/// 取得Excel限制筆數
/// </summary>
/// <param name="sheet">來源Excel</param>
private static int ExcelMax()
{
return 100;
}
}
4。程式中調用
代碼如下：
View Code
System.Windows.Forms.SaveFileDialog saveFile = new System.Windows.Forms.SaveFileDialog();
saveFile.Filter = "XLS|*.xls";
saveFile.FileName ="工單"+ DateTime.Now.ToString("yyyy-MM-dd");
if (System.Windows.Forms.DialogResult.OK == saveFile.ShowDialog()) {
var fileName = saveFile.FileName;
//定義欄位
TECOSFIS.App_Code.XlsMapDictionary xlsMapDictionary=new App_Code.XlsMapDictionary();
xlsMapDictionary.Add("工單", "WKORID");
xlsMapDictionary.Add("機種", "ModelsNAME");
xlsMapDictionary.Add("機種數量", "POTOTAIL");
xlsMapDictionary.Add("平均效率", "Efficiency");
//ds 為數據集合
//filename 為生成的文件名
ExcellToFile.WriteExcel(ds, xlsMapDictionary, fileName);
}
5.說明：
上面調用代碼，是在cs結構中操作的，如果是web，基本一樣。只是再加一個下載程式。代碼如下：
View Code
/// <summary>
/// 查詢結果Excel下載For DataSet
/// </summary>
protected virtual void DownloadExcel(XlsMapDictionary xlsMapDictionary, DataSet ds)
{
//string sql = string.Empty;
//DataSet ds = null;
try
{
//sql = (string)ViewState[ThisIdentity.UserId + this.Title + "sql"];
if (ds != null)
{
//ds = this.Query(sql);
string fullPath = WriteExcel(ds, xlsMapDictionary);
string fileName = this.Title + "_" + DateTime.Now.ToString("yyyyMMddHHmmss") + ".xls";
Response.ClearHeaders();
Response.Clear();
Response.Expires = 0;
Response.Buffer = true;
Response.AddHeader("Accept-Language", currentCulture);
string tmp = "attachment;filename=" + System.Web.HttpUtility.UrlEncode(System.Text.Encoding.UTF8.GetBytes(fileName));
Response.AddHeader("content-disposition", tmp);
Response.ContentType = "Application/octet-stream";
byte[] theData = System.IO.File.ReadAllBytes(fullPath);
//Response.BinaryWrite(File.ReadAllBytes(fullPath));
Response.BinaryWrite(theData);
Response.Flush();
Response.Close();
File.Delete(fullPath);
/*
* Response.End()會產生ThreadAbortException 異常,但是不加http流會加上"<html><title> </title>.....
* 之類的html符號.
*/
try
{
//Response.End();
Response.Clear();
}
catch (System.Threading.ThreadAbortException tae)
{
}
}
}
catch (SqlException sqlex)
{
logger.ErrorException(sqlex.ToString(), sqlex);
throw sqlex;
}
catch (Exception ex)
{
logger.ErrorException(ex.ToString(), ex);
throw ex;
}
}
摘自 無限遐想
