[研究][ASP.NET][RSS]XML declaration allowed only at the start of the document

[研究][ASP.NET]error on line 3 at column 6: XML declaration allowed only at the start of the document

2022-12-23

環境：Visual Studio 2022 + ASP.NET + WebForm + Web Application + C#

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This page contains the following errors:

error on line 3 at column 6: XML declaration allowed only at the start of the document

Below is a rendering of the page up to the first error.

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檢查

XML declaration allowed only at the start of the document => XML 聲明只允許在文檔的開頭

Default.aspx

<%@ Page Language="C#" ContentType="text/xml" AutoEventWireup="false" CodeBehind="RSS.aspx.cs" Inherits="NICSFrontWebApplication.RSS" %> <?xml version="1.0" encoding="utf-8" ?>

檢視網頁 HTML Source，發現第一行是空的，Page 那行必須刪除。

(完)

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