如何在运行时validationxml对xsd而不保存本地文件夹中的xsd文件？

我的目标是针对xsd whitch在字符串变量中validationxml文件。 Ps。：我周五已经写了一个编号为3072697的问题。 但我今天无法添加此代码。

是book.xml：

  Herman Melville  

book.xsd：

Xsd_after_saved（）完美地在Xsd_after_saved（）中，我需要使用XSD的每个地方，我从本地获取文件

 public void Xsd_after_saved() { XmlReaderSettings settings = new XmlReaderSettings(); settings.ValidationEventHandler += this.ValidationEventHandler; settings.ValidationType = ValidationType.Schema; settings.Schemas.Add(null, XmlReader.Create(@"C:\book.xsd")); settings.CheckCharacters = true; XmlReader XmlValidatingReader = XmlReader.Create(@"C:\book.xml", settings); XmlTextReader Reader = new XmlTextReader(@"C:\book.xml"); StreamReader SR = new StreamReader(@"C:\book.xsd"); XmlSchema Schema = new XmlSchema(); Schema = XmlSchema.Read(SR, ValidationEventHandler); XmlValidatingReader ValidatingReader = new XmlValidatingReader(Reader); ValidatingReader.ValidationType = ValidationType.Schema; ValidatingReader.Schemas.Add(Schema); try { XmlValidatingReader.Read(); XmlValidatingReader.Close(); ValidatingReader.ValidationEventHandler += ValidationEventHandler; while ((ValidatingReader.Read())) { } ValidatingReader.Close(); } catch (Exception ex) { ValidatingReader.Close(); XmlValidatingReader.Close(); } } 

Xsd_whithout_saved（）不工作在Xsd_whithout_saved（）中，我需要XSD的每个地方，我从变量StreamReader获得名为readerXsd whitch来自一个字符串

 public void Xsd_whithout_saved() { //>>>Here is the biggest diference from the method Xsd_after_saved: I manipulate the XSD as string because it will come from database and //it will not allowed to be saved locally XmlDocument xmlDoc = new XmlDocument(); xmlDoc.Load(@"C:\book.xsd"); //In the futute, strArquivoInteiro will be fullfill by xsd comming from database as nvarchar(max) and I will not be allowed to save as a file locally string strArquivoInteiro = xmlDoc.OuterXml; byte[] byteArray = Encoding.ASCII.GetBytes(strArquivoInteiro); MemoryStream streamXSD = new MemoryStream(byteArray); //<<< StreamReader readerXsd = new StreamReader(streamXSD); XmlReaderSettings settings = new XmlReaderSettings(); settings.ValidationEventHandler += this.ValidationEventHandler; settings.ValidationType = ValidationType.Schema; settings.Schemas.Add(null, XmlReader.Create(readerXsd)); settings.CheckCharacters = true; XmlReader XmlValidatingReader = XmlReader.Create(@"C:\book.xml", settings); XmlTextReader Reader = new XmlTextReader(@"C:\book.xml"); XmlSchema Schema = new XmlSchema(); //IN THIS LINE I RECEIVED THE XmlException "Root Element is Missing" and I can't understand the reason Schema = XmlSchema.Read(readerXsd, ValidationEventHandler); XmlValidatingReader ValidatingReader = new XmlValidatingReader(Reader); ValidatingReader.ValidationType = ValidationType.Schema; ValidatingReader.Schemas.Add(Schema); try { XmlValidatingReader.Read(); XmlValidatingReader.Close(); ValidatingReader.ValidationEventHandler += ValidationEventHandler; while ((ValidatingReader.Read())) { } ValidatingReader.Close(); } catch (Exception ex) { ValidatingReader.Close(); XmlValidatingReader.Close(); } } private void ValidationEventHandler(object sender, ValidationEventArgs args) { //place to deal with xml file no valided } 

Answer 1

使用此方法从字符串生成流，（感谢Cameron MacFarland ）

 public Stream GenerateStreamFromString(string s) { MemoryStream stream = new MemoryStream(); StreamWriter writer = new StreamWriter(stream); writer.Write(s); writer.Flush(); stream.Position = 0; return stream; } 

Answer 2

将XML保存到内存后，需要寻找流的开头。 否则，validation时，validation将从保存中断的位置开始 – 在数据结束时。

此外，您需要确保正确处理读者和流。

 //The Xsd_whithout_saved() is not working //In Xsd_whithout_saved(), every place I need the XSD, I got from variable StreamReader named readerXsd whitch come from a string public void Xsd_whithout_saved() { //>>>Here is the biggest diference from the method Xsd_after_saved: I manipulate the XSD as string because it will come from database and //it will not allowed to be saved locally XmlDocument xmlDoc = new XmlDocument(); xmlDoc.Load(@"C:\book.xsd"); //In the futute, strArquivoInteiro will be fullfill by xsd comming from database as nvarchar(max) and I will not be allowed to save as a file locally string strArquivoInteiro = xmlDoc.OuterXml; byte[] byteArray = Encoding.ASCII.GetBytes(strArquivoInteiro); using (MemoryStream streamXSD = new MemoryStream(byteArray)) using (StreamReader readerXsd = new StreamReader(streamXSD)) { XmlReaderSettings settings = new XmlReaderSettings(); settings.ValidationEventHandler += this.ValidationEventHandler; settings.ValidationType = ValidationType.Schema; settings.Schemas.Add(null, XmlReader.Create(readerXsd)); settings.CheckCharacters = true; using (XmlReader XmlValidatingReader = XmlReader.Create(@"C:\book.xml", settings)) using (XmlTextReader Reader = new XmlTextReader(@"C:\book.xml")) { XmlSchema Schema = new XmlSchema(); streamXSD.Seek(SeekOrigin.Begin, 0); Schema = XmlSchema.Read(readerXsd, ValidationEventHandler); XmlValidatingReader ValidatingReader = new XmlValidatingReader(Reader); ValidatingReader.ValidationType = ValidationType.Schema; ValidatingReader.Schemas.Add(Schema); try { XmlValidatingReader.Read(); XmlValidatingReader.Close(); ValidatingReader.ValidationEventHandler += ValidationEventHandler; while ((ValidatingReader.Read())) { } ValidatingReader.Close(); } catch (Exception ex) { ValidatingReader.Close(); XmlValidatingReader.Close(); } } } }