C#中获取Excel文件的表名

public static string GetExcelFirstTableName(string excelFileName)
{
    string tableName = null;
    if (File.Exists(excelFileName))
    {
        using (OleDbConnection conn = new OleDbConnection("Provider=Microsoft.Jet."+
                    "OLEDB.4.0;Extended Properties=\"Excel 8.0\";Data Source=" + excelFileName))
        {
            conn.Open();
            DataTable dt = conn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
            for(int i=0;i<dt.Rows.Count;i++)
            {
                tableName+=dt.Rows[i][2].ToString().Trim()+";";
            }
        }
    }
    return RemoveTail(tableName);
}