将数据集转换为XML

我已经坚持这个问题几个小时了，似乎无法搞清楚，所以我在这里问:)

好吧，我有这个function：

private void XmlDump() { XDocument doc = new XDocument(new XDeclaration("1.0", "utf-8", "yes")); XElement rootElement = new XElement("dump"); rootElement.Add(TableToX("Support")); string connectionString = ConfigurationManager.ConnectionStrings["MyDb"].ConnectionString; SqlConnection con = new SqlConnection(connectionString); string sql = "select * from support"; SqlDataAdapter da = new SqlDataAdapter(sql, con); DataSet ds = new DataSet("Test"); da.Fill(ds, "support"); // Convert dataset to XML here var docresult = // Converted XML Response.Write(docResult); Response.ContentType = "text/xml; charset=utf-8"; Response.AddHeader("Content-Disposition", "attachment; filename=test.xml"); Response.End(); } 

我一直在尝试各种不同的东西，但我一直在收到错误，所以我离开了如何将DataSet转换为XML部分空白。

另外，此查询包含具有特殊字符的列。

Answer 1

您可以使用ds.WriteXml ，但这需要您有一个Stream来输出输出。 如果您想要输出字符串，请尝试以下扩展方法：

 public static class Extensions { public static string ToXml(this DataSet ds) { using (var memoryStream = new MemoryStream()) { using (TextWriter streamWriter = new StreamWriter(memoryStream)) { var xmlSerializer = new XmlSerializer(typeof(DataSet)); xmlSerializer.Serialize(streamWriter, ds); return Encoding.UTF8.GetString(memoryStream.ToArray()); } } } } 

用法：

 var xmlString = ds.ToXml(); // OR Response.Write(ds.ToXml()); 

Answer 2

只需使用Dataset.getXml() ：

 doc.LoadXml(ds.GetXml()); 

Answer 3

写下面的代码部分

 DataTable dt = new DataTable("MyData"); dt.WriteXml(@Application.StartupPath + "\\DataBaseValues.xml"); 

或者，您也可以直接转换dataSet如Oded所说，

 private void WriteXmlToFile(DataSet thisDataSet) { if (thisDataSet == null) { return; } // Create a file name to write to. string filename = "myXmlDoc.xml"; // Create the FileStream to write with. System.IO.FileStream myFileStream = new System.IO.FileStream(filename, System.IO.FileMode.Create); // Create an XmlTextWriter with the fileStream. System.Xml.XmlTextWriter myXmlWriter = new System.Xml.XmlTextWriter(myFileStream, System.Text.Encoding.Unicode); // Write to the file with the WriteXml method. thisDataSet.WriteXml(myXmlWriter); myXmlWriter.Close(); } 

Answer 4

使用DataSet.WriteXml – 它将以XML格式输出数据集。

Answer 5

我们也可以使用它

 
  私有函数DsToXML（DataSet ds）作为System.Xml.XmlDataDocument

     Dim xmlDoc As System.Xml.XmlDataDocument 
     Dim xmlDec As System.Xml.XmlDeclaration
     Dim xmlWriter As System.Xml.XmlWriter
     xmlWriter = New XmlTextWriter（context.Response.OutputStream，System.Text.Encoding.UTF8）

     xmlDoc =新的System.Xml.XmlDataDocument（ds）
     xmlDoc.DataSet.EnforceConstraints = False
     xmlDec = xmlDoc.CreateXmlDeclaration（“1.0”，“UTF-8”，Nothing）
     xmlDoc.PrependChild（xmlDec）
     xmlDoc.WriteTo（XmlWriter的）
    重新调整xmlDoc
  结束点

Answer 6

如果ds是你的数据集..

您可以使用：

 ds.getXml(); 

这有助于获取XML

Answer 7

试试这个。 它对我有用。

 static XmlDocument xdoc = new XmlDocument(); //static; since i had to access this file someother place too protected void CreateXmlFile(DataSet ds) { //ds contains sales details in this code; ie list of products along with quantity and unit //You may change attribute acc to your needs ; ie employee details in the below code string salemastid = lbl_salemastid.Text; int i = 0, j=0; String str = "salemastid:" + salemastid; DataTable dt = ds.Tables[0]; string xml = "" ; while (j < dt.Rows.Count) { int slno = j + 1; string sl = slno.ToString(); xml += "" + sl +"" + "" + dt.Rows[j][0].ToString() + "" + "" + dt.Rows[j][1].ToString() + "" + "" + dt.Rows[j][2].ToString() + ""; j++; } xml += ""; xdoc.LoadXml(xml); //Here the xml is prepared and loaded in xml DOM. xdoc.Save(Server.MapPath("Newsales.xml")); //You may also use some other names instead of 'Newsales.xml' //to get a downloadable file use the below code System.IO.MemoryStream stream = new System.IO.MemoryStream(); XmlTextWriter xwriter = new XmlTextWriter(stream, System.Text.Encoding.UTF8); xdoc.WriteTo(xwriter); xwriter.Flush(); Response.Clear(); Encoding.UTF8.GetString(stream.ToArray()); byte[] byteArray = stream.ToArray(); Response.AppendHeader("Content-Disposition", "filename=OrderRequest.xml"); Response.AppendHeader("Content-Length", byteArray.Length.ToString()); Response.ContentType = "application/octet-stream"; Response.BinaryWrite(byteArray); xwriter.Close(); stream.Close(); }