OLEDB provider is not registered on the local machine

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C#

protected void btnImport_Click(object sender, EventArgs e)
        {
            SaveExcel_Database();
            DataTable dt = (DataTable)ViewState["ItemDetl"];

            DataTable dtdistinct = dt.AsEnumerable().GroupBy(x => x["ID"]).Select(x => x.First()).CopyToDataTable();
            dtdistinct.AsEnumerable().ToList().ForEach(r => r.SetField("Name", dt.AsEnumerable().Where(p=>p["ID"].ToString()==r["ID"].ToString()).Count()));
        }

        private void SaveExcel_Database()
        {
            try
            {
                string path = "";
                string path1 = "";
                if (fld.HasFile)
                {
                    string str = "~/Inventory/UploadSheet";
                    string filename = fld.FileName;
                    if (!Directory.Exists(Server.MapPath(str)))
                    {
                        Directory.CreateDirectory(Server.MapPath(str));
                        //Directory.SetAccessControl(
                        path1 = Server.MapPath(str + "/");
                        path = path1 + filename;
                        fld.SaveAs(path1 + filename);
                    }
                    else
                    {
                        path1 = Server.MapPath(str + "/");
                        path = path1 + filename;
                        fld.SaveAs(path1 + filename);
                    }
                    string Extension = Path.GetExtension(fld.PostedFile.FileName);
                    BudgetExcelUpload(Extension, path);
                }
                if ((System.IO.File.Exists(path1)))
                {
                    System.IO.File.Delete(path1);
                }
                if ((System.IO.File.Exists(path)))
                {
                    System.IO.File.Delete(path);
                }
            }
            catch
            {
            }
        }

        private string GetExcelSheetNames(string conStr)
        {
            OleDbConnection objConn = null;
            System.Data.DataTable dt = null;
            string aa = "";

            try
            {
                objConn = new OleDbConnection(conStr);
                // Open connection with the database.
                objConn.Open();
                // Get the data table containg the schema guid.
                dt = objConn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
                if (dt == null)
                {
                    return null;
                }
                String[] excelSheets = new String[dt.Rows.Count];
                int i = 0;

                // Add the sheet name to the string array.
                foreach (DataRow row in dt.Rows)
                {
                    excelSheets[i] = row["TABLE_NAME"].ToString().Trim();
                    i++;
                }
                // Loop through all of the sheets if you want too…
                for (int j = 0; j < excelSheets.Length; j++)
                {
                    // Query each excel sheet.
                    aa = dt.Rows[0][2].ToString().Trim();
                }
            }
            catch
            {
                
            }
            finally
            {
                // Clean up.
                if (objConn != null)
                {
                    objConn.Close();
                    objConn.Dispose();
                }
                if (dt != null)
                {
                    dt.Dispose();
                }
            }
            return aa;
        }

        public void BudgetExcelUpload(string Extesion, string path)
        {
            DataTable dtableItem = new DataTable();
            try
            {
                string Extension1 = Extesion;
                string path1 = path;
                string conStr = "";

                switch (Extension1)
                {
                    case ".xls": //Excel 97-03
                        conStr = @"Provider=Microsoft.Jet.OLEDB.4.0;" +
                            @"Data Source=" + path1 + ";" +
                            @"Extended Properties=" + Convert.ToChar(34).ToString().Trim() +
                            @"Excel 8.0;HDR=YES" + Convert.ToChar(34).ToString().Trim();
                        break;
                    case ".xlsx": //Excel 07
                        conStr = @"Provider=Microsoft.ACE.OLEDB.12.0;" +
                           @"Data Source=" + path1 + ";" +
                           @"Extended Properties=" + Convert.ToChar(34).ToString().Trim() +
                           @"Excel 12.0;HDR=YES" + Convert.ToChar(34).ToString().Trim();
                        break;
                }

                //DataTable dtableSalaryMaster = new DataTable();

                OleDbConnection oconn = new OleDbConnection(conStr);
                string worksheetName = GetExcelSheetNames(conStr);
                OleDbDataAdapter cmd = new OleDbDataAdapter();
                DataSet excelDataSet1 = new DataSet();

                //======================================================
                // FETCHING EMPLOYEE DETAILS FROM EXCEL SHEET
                //======================================================

                cmd = new System.Data.OleDb.OleDbDataAdapter("SELECT * FROM [" + worksheetName + "] ", oconn);
                cmd.Fill(dtableItem);

                ViewState["ItemDetl"] = dtableItem;
            }
            catch
            {
            }
        }

What I have tried:

@"Provider=Microsoft.ACE.OLEDB.12.0;" +
@"Data Source=" + path1 + ";" +
@"Extended Properties=" + Convert.ToChar(34).ToString().Trim() +
@"Excel 12.0;HDR=YES" + Convert.ToChar(34).ToString().Trim();