鑄文字XML錯誤非法限定名稱字符

Question

如何修正錯誤非法限定名稱的字符，該樣品中：

Declare @Str As nvarchar(256) 
Set @Str = N'<Log "ReceiptStockHNo="2" ReceiptStockHDate="Feb 4 2" Comment="" />' 
Select Cast(@Str As xml) 

錯誤：

消息9455，級別16，狀態1，5號線
XML分析：行1，字符6，非法限定名稱字符

Answer 1

這是什麼額外"？ 。

取出"，它會工作。

其他信息：

爲了防止未來的錯誤對需要編碼的字符，如&，<，使用適當的替換：

Declare @Str As nvarchar(256) 
Set @Str = '<tag>&</tag>' 
Select Cast(@Str As xml) 

將產生：

消息9421，級別16 ，狀態1，行3 XML解析：行1，字符7
非法名字字符

當改變<到<：

Declare @Str As nvarchar(256) 
Set @Str = '<tag>&lt;</tag>' 
Select Cast(@Str As xml) 

都會好的。

Answer 2

注意：這不是一個答案，而是一個擴展的評論。

婁串

N'<Log "ReceiptStockHNo="2" ReceiptStockHDate="Feb 4 2" Comment="" />' 

它不是一個有效的XML，因爲"從"ReceiptStockHNo（第一屬性的名稱）。 如果XML數據是內置的使用字符串連接並且不使用專用的XML API /功能，則可能會發生這種情況。

例如，如果（1）屬性名稱被存儲在作爲TABLE.COLUMN

"ReceiptStockHNo 

和（2）來構建XML文檔/使用片段字符串連接我們可能得到一個無效的XML。一種解決方案可能是FOR XML。見下面的例子和尾註：

DECLARE @Table1 TABLE(
    ID INT NOT NULL PRIMARY KEY, 
    RowType TINYINT NOT NULL, -- 1 = Log [record] 
    Attribute1 NVARCHAR(100) NOT NULL, 
    Attribute1_Value INT, 
    Attribute2 NVARCHAR(100) NOT NULL, 
    Attribute2_Value DATETIME 
) 
INSERT @Table1 
VALUES (123, 1, N'"ReceiptStockHNo', 2, N'ReceiptStockHDate', '2014-02-04 00:00:00.000') 

-- Get data as XML: method #1 (wrong) 
DECLARE @x NVARCHAR(256) 
SELECT @x = N'<Log ' + t.Attribute1 + '="' + CONVERT(VARCHAR(11), t.Attribute1_Value) + '" ' + t.Attribute2 + '="' + CONVERT(VARCHAR(25), t.Attribute2_Value) + '" Comment="" />' 
FROM @Table1 t 
WHERE t.ID = 123 
AND  t.RowType = 1 -- Log [record] 

SELECT @x AS [Get data as XML: method #1 (wrong)] 
SELECT 'Convert to XML' AS [Message] 
BEGIN TRY 
    SELECT CONVERT(XML, @x) AS [Convert to XML result] 
END TRY 
BEGIN CATCH 
    SELECT ERROR_MESSAGE() AS [Get data as XML: method #1 (wrong) - ERROR_MESSAGE] 
END CATCH 

-- Get data as XML: method #2 (ok) 
SET @x = N'' 
SET @x = 
(
    SELECT t.Attribute1_Value AS '"ReceiptStockHNo', 
      t.Attribute2_Value AS 'ReceiptStockHDate', 
      '' AS Comment 
    FROM @Table1 t 
    WHERE t.ID = 123 
    AND  t.RowType = 1 -- Log [record] 
    FOR XML RAW('Log') 
) 

SELECT @x AS [Get data as XML: method #2 (ok)] 
SELECT 'Convert to XML' AS [Message] 
SELECT CONVERT(XML, @x) AS [Convert to XML result] 

輸出：

Get data as XML: method #1 (wrong) 
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- 
<Log "ReceiptStockHNo="2" ReceiptStockHDate="Feb 4 2014 12:00AM" Comment="" /> 

Message 
-------------- 
Convert to XML 

Convert to XML result 
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- 

Get data as XML: method #1 (wrong) - ERROR_MESSAGE 
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- 
XML parsing: line 1, character 6, illegal qualified name character 

Get data as XML: method #2 (ok) 
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- 
<Log _x0022_ReceiptStockHNo="2" ReceiptStockHDate="2014-02-04T00:00:00" Comment=""/> 

Message 
-------------- 
Convert to XML 

Convert to XML result 
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- 
<Log _x0022_ReceiptStockHNo="2" ReceiptStockHDate="2014-02-04T00:00:00" Comment="" /> 

當我使用FOR XML生成的XML數據我得到不同的結果，因爲FOR XML編碼保留XML字符（包括那些從qualified names）。在這種情況下，"被編碼爲_x0022_：

"ReceiptStockHNo與_x0022_ReceiptStockHNo