asp.net 讀取Excel資料到DataTable的代碼

複製代碼 代碼如下:/// <summary>
/// 擷取指定路徑、指定活頁簿名稱的Excel資料:取第一個sheet的資料
/// </summary>
/// <param name="FilePath">檔案儲存體路徑</param>
/// <param name="WorkSheetName">活頁簿名稱</param>
/// <returns>如果爭取找到了資料會返回一個完整的Table，否則返回異常</returns>
public DataTable GetExcelData(string astrFileName)
{
string strSheetName = GetExcelWorkSheets(astrFileName)[0].ToString();
return GetExcelData(astrFileName, strSheetName);
}

代碼 複製代碼 代碼如下:/// <summary>
/// 返回指定檔案所包含的活頁簿列表;如果有WorkSheet，就返回以活頁簿名字命名的ArrayList，否則返回空
/// </summary>
/// <param name="strFilePath">要擷取的Excel</param>
/// <returns>如果有WorkSheet，就返回以活頁簿名字命名的ArrayList，否則返回空</returns>
public ArrayList GetExcelWorkSheets(string strFilePath)
{
ArrayList alTables = new ArrayList();
OleDbConnection odn = new OleDbConnection(GetExcelConnection(strFilePath));
odn.Open();
DataTable dt = new DataTable();
dt = odn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
if (dt == null)
{
throw new Exception("無法擷取指定Excel的架構。");
}
foreach (DataRow dr in dt.Rows)
{
string tempName = dr["Table_Name"].ToString();
int iDolarIndex = tempName.IndexOf('$');
if (iDolarIndex > 0)
{
tempName = tempName.Substring(0, iDolarIndex);
}
//修正了Excel2003中某些工作薄名稱為漢字的表無法正確識別的BUG。
if (tempName[0] == '\'')
{
if (tempName[tempName.Length - 1] == '\'')
{
tempName = tempName.Substring(1, tempName.Length - 2);
}
else
{
tempName = tempName.Substring(1, tempName.Length - 1);
}
}
if (!alTables.Contains(tempName))
{
alTables.Add(tempName);
}
}
odn.Close();
if (alTables.Count == 0)
{
return null;
}
return alTables;
}

代碼 複製代碼 代碼如下:/// <summary>
/// 擷取指定路徑、指定活頁簿名稱的Excel資料
/// </summary>
/// <param name="FilePath">檔案儲存體路徑</param>
/// <param name="WorkSheetName">活頁簿名稱</param>
/// <returns>如果爭取找到了資料會返回一個完整的Table，否則返回異常</returns>
public DataTable GetExcelData(string FilePath, string WorkSheetName)
{
DataTable dtExcel = new DataTable();
OleDbConnection con = new OleDbConnection(GetExcelConnection(FilePath));
OleDbDataAdapter adapter = new OleDbDataAdapter("Select * from [" + WorkSheetName + "$]", con);
//讀取
con.Open();
adapter.FillSchema(dtExcel, SchemaType.Mapped);
adapter.Fill(dtExcel);
con.Close();
dtExcel.TableName = WorkSheetName;
//返回
return dtExcel;
}

代碼 複製代碼 代碼如下:/// <summary>
/// 擷取連結字串
/// </summary>
/// <param name="strFilePath"></param>
/// <returns></returns>
public string GetExcelConnection(string strFilePath)
{
if (!File.Exists(strFilePath))
{
throw new Exception("指定的Excel檔案不存在！");
}
return "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + strFilePath + ";Extended properties=\"Excel 8.0;Imex=1;HDR=Yes;\"";
//@"Provider=Microsoft.Jet.OLEDB.4.0;" +
//@"Data Source=" + strFilePath + ";" +
//@"Extended Properties=" + Convert.ToChar(34).ToString() +
//@"Excel 8.0;" + "Imex=1;HDR=Yes;" + Convert.ToChar(34).ToString();
}