VB NET中的wmlwriter问题 [英] Problem with wmlwriter in VB NET
问题描述
大家好。
我正在开发一个Visual Studio 2017（Visual Basic）项目，尝试生成一个XML文件，由适当的DAC验证，用于电子发票。 />
- 我正在使用过去使用的xmlWriter类，通过Visual Studio 2010，它运行得很好。
但现在，使用我之前使用的相同语句，当我尝试使用'WriteStartElement'方法时，它会失败并发送消息：
Carácterdenombrenováliden'cfdi：Comprobante'.Elcarácter'：'，con valor hexadecimal 0x3A，no puede incluirse en un nombre。
In英语（或多或少）名称中的字符无效。具有十六进制值0x3A的字符'：'不能包含在名称中。
- 我也曾经使用ascii字符（34）连接文本字符串中的''字符，该字符应该包含在文字的一部分中，但它会生成一对'''，而不仅仅是我想要的一个。像这样：
Dim Cadena As String =：xsi =+ Chr（34）+http://www.w3.org/2001/XMLSchema-实例+ Chr（34）+xsi：schemaLocation =+ Chr（34）+http://www.uif.shcp.gob.mx/recepcion/ari ari.xsd+ Chr（34）_
+xmlns =+ Chr（34）+http://www.uif.shcp.gob.mx/recepcion/ari
任何人都可以帮助我或暗示在哪里寻找这对疑惑吗？
提前致谢。
我尝试了什么：
我一直在寻找通过互联网，我还没有找到任何东西。我将继续寻找一些东西，但我会感激任何帮助。
我不知道为什么同样的例程以前工作正常而不是现在。
我做了一些测试并确定你需要使用XmlWriter.WriteStartElement的一个重载，特别是; XmlWriter.WriteStartElement方法（String，String，String） （System.Xml） [ ^ ]
以下代码段可以正常使用&将为您提供评论中所要求的输出;
Dim sett as XmlWriter.Settings = 新 XMLWriterSettings（）;
sett.Indent = True
使用 writer as XmlWriter = XmlWriter.Create（ 文件名和路径，设置）
writer.WriteStartElement（ cfdi， Comprobante， http：/ /www.sat.gob.mx/cfd/3）
writer.WriteAttributeString（ xmlns， xsi，null， http://www.w3.org/2001/XMLSchema-Instance）
writer.WriteAttributeString（ xmlns， schemaLocation，null， http：//www.sat。 gob.mx/cfd/3 http://www.sat.gob.mx/sitio_internet/cfd/3/cdv33.xsd）
' 添加其他元素
' 写结束元素
writer.WriteEndElement（）
新版本 - 打开一个全新的C＃Windows窗体项目，在表单中添加一个按钮。以下代码可以输入button_click事件;
private void button1_Click（ object sender，EventArgs e）
{
XmlWriter writer = < span class =code-keyword> null ;
尝试
{
XmlWriterSettings settings = new XmlWriterSettings（）;
settings.Indent = true ;
writer = XmlWriter.Create（ FileName.xml，settings）;
writer.WriteComment（ 示例XML片段）;
writer.WriteStartElement（ cfdi， Comprobante， http：/ /www.sat.gob.mx/cfd/3\" ）;
writer.WriteAttributeString（ xmlns， xsi， null ， @ http://www.w3.org/2001/XMLSchema-Instance）;
writer.WriteAttributeString（ xmlns， schemaLoc， null ， @ http://www.sat.gob.mx/cfd/3 http://www.sat.gob.mx/sitio_internet/cfd/3/cdv33.xsd ）;
writer.WriteStartElement（ cfdi， ElementName， http://www.sat.gob.mx/cfd/3\" ）;
writer.WriteString（ 这是我的元素字符串）;
writer.WriteEndElement（）;
// 写下根元素的关闭标记。
writer.WriteEndElement（）;
// 将XML写入文件并关闭编写器。
writer.Flush（）;
writer.Close（）;
}
最后
{
如果（writer！= null ）
writer.Close（）;
}
}
这将输出以下XML;
<？xml version =1.0encoding =utf-8？>
<！ - 示例XML片段 - >
< cfdi：Comprobante xmlns：xsi =http://www.w3.org/2001/XMLSchema-Instancexmlns：schemaLoc =http://www.sat.gob.mx/cfd/3 http ：//www.sat.gob.mx/sitio_internet/cfd/3/cdv33.xsdxmlns：cfdi =http://www.sat.gob.mx/cfd/3>
< cfdi：elementname>这是我的元素字符串
亲切的问候
Hello to everybody.
I'm developing a Visual Studio 2017 (Visual Basic) project trying to generate a XML File to be validated by the proper DAC, for an electronic Invoice.
- I'm using the xmlWriter class, which I used in the past, thru Visual Studio 2010 and it worked just fine.
But now, using the same statements I used previously, when I try to use the 'WriteStartElement' method, it fails and sends the message:
"Carácter de nombre no válido en 'cfdi:Comprobante'. El carácter ':', con valor hexadecimal 0x3A, no puede incluirse en un nombre."
In english (more or less) "Invalid character in name. The character ':' with hexadecimal value 0x3A cannot be included in a name".
- I also used to use the ascii character (34) to concatenate a '"' character in a text string that should have it included as part of the literal, but it generates a couple of '"', not just one, as i want. Like this:
Dim Cadena As String = ":xsi=" + Chr(34) + "http://www.w3.org/2001/XMLSchema-instance" + Chr(34) + " xsi:schemaLocation = " + Chr(34) + "http://www.uif.shcp.gob.mx/recepcion/ari ari.xsd" + Chr(34) _
+ " xmlns = " + Chr(34) + "http://www.uif.shcp.gob.mx/recepcion/ari"
Can anybody help me or give a hint about where to look for this pair of doubts ?
Thanks in advance.
What I have tried:
I´d been looking thru the Internet and I haven't found anything yet. I'm going to continue searching for something, but I'd appreciate any help.
I don't know why the same routines worked fine before and not now.
I did a bit of testing and determined you need to use one of the overloads of XmlWriter.WriteStartElement, specifically; XmlWriter.WriteStartElement Method (String, String, String) (System.Xml)[^]
The below snippet does work & will give you the output that you have requested in your comment;
Dim sett as XmlWriter.Settings = New XMLWriterSettings(); sett.Indent = True using writer as XmlWriter = XmlWriter.Create("Filename and Path", sett) writer.WriteStartElement("cfdi", "Comprobante", "http://www.sat.gob.mx/cfd/3") writer.WriteAttributeString("xmlns", "xsi", null, "http://www.w3.org/2001/XMLSchema-Instance") writer.WriteAttributeString("xmlns", "schemaLocation", null, "http://www.sat.gob.mx/cfd/3 http://www.sat.gob.mx/sitio_internet/cfd/3/cdv33.xsd") ' add additional elements ' write end element writer.WriteEndElement()
New version - open a brand new C# Windows Form project, add a single button to the form. The below code can be entered into the button_click event;
private void button1_Click(object sender, EventArgs e) { XmlWriter writer = null; try { XmlWriterSettings settings = new XmlWriterSettings(); settings.Indent = true; writer = XmlWriter.Create("FileName.xml", settings); writer.WriteComment("sample XML fragment"); writer.WriteStartElement("cfdi", "Comprobante", "http://www.sat.gob.mx/cfd/3"); writer.WriteAttributeString("xmlns", "xsi", null, @"http://www.w3.org/2001/XMLSchema-Instance"); writer.WriteAttributeString("xmlns", "schemaLoc", null, @"http://www.sat.gob.mx/cfd/3 http://www.sat.gob.mx/sitio_internet/cfd/3/cdv33.xsd"); writer.WriteStartElement("cfdi", "ElementName", "http://www.sat.gob.mx/cfd/3"); writer.WriteString("This is my element string"); writer.WriteEndElement(); // Write the close tag for the root element. writer.WriteEndElement(); // Write the XML to file and close the writer. writer.Flush(); writer.Close(); } finally { if (writer != null) writer.Close(); } }
This will output the following XML;
<?xml version="1.0" encoding="utf-8"?>
<!--sample XML fragment-->
<cfdi:Comprobante xmlns:xsi="http://www.w3.org/2001/XMLSchema-Instance" xmlns:schemaLoc="http://www.sat.gob.mx/cfd/3 http://www.sat.gob.mx/sitio_internet/cfd/3/cdv33.xsd" xmlns:cfdi="http://www.sat.gob.mx/cfd/3">
<cfdi:elementname>This is my element string
Kind Regards
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