/// <summary>
/// 獲取指定路徑、指定工作簿名稱的Excel數(shù)據(jù):取第一個(gè)sheet的數(shù)據(jù)
/// </summary>
/// <param name="FilePath">文件存儲(chǔ)路徑</param>
/// <param name="WorkSheetName">工作簿名稱</param>
/// <returns>如果爭(zhēng)取找到了數(shù)據(jù)會(huì)返回一個(gè)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);
}

/// <summary>
/// 返回指定文件所包含的工作簿列表;如果有WorkSheet，就返回以工作簿名字命名的ArrayList，否則返回空
/// </summary>
/// <param name="strFilePath">要獲取的Excel</param>
/// <returns>如果有WorkSheet，就返回以工作簿名字命名的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(wú)法獲取指定Excel的架構(gòu)。");
}
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(wú)法正確識(shí)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;
}

/// <summary>
/// 獲取指定路徑、指定工作簿名稱的Excel數(shù)據(jù)
/// </summary>
/// <param name="FilePath">文件存儲(chǔ)路徑</param>
/// <param name="WorkSheetName">工作簿名稱</param>
/// <returns>如果爭(zhēng)取找到了數(shù)據(jù)會(huì)返回一個(gè)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;
}

/// <summary>
/// 獲取鏈接字符串
/// </summary>
/// <param name="strFilePath"></param>
/// <returns></returns>
public string GetExcelConnection(string strFilePath)
{
if (!File.Exists(strFilePath))
{
throw new Exception("指定的Excel文件不存在！");
}
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();
}