ReadElementContentAsString yöntemi, node type Text

Question

üzerinde desteklenmiyor XML'yi ayrıştırmaya çalışıyorum ve XMLreader kullanarak tüm bilgileri almayı deniyorum. Bir nedenden ötürü başlığı hatayı atıyor. İşte xml geçerli:

<?xml version="1.0" encoding="utf-8" ?> 
<queries> 
    <selectparent table="Associates">"SELECT * FROM @table"</selectparent> 
    <selectchild table="VehicleContract">"SELECT * FROM @table"</selectchild> 
    <addchild table="VehicleContract" read="contractId, regNr, assoc_id, percentage, vehicleType, trailerNr">"INSERT into @table (contractId, regNr, assoc_id, percentage, vehicleType, trailerNr) VALUES (@id, @reg, @assort, @perc, @type, @trailer)"</addchild> 
    <updatechild table="VehicleContract" read="contractId, regNr, assoc_id, percentage, vehicleType, trailerNr">"UPDATE @table SET regNr=@reg, assoc_id=@assort, percentage=@perc, vehicleType=@type, trailerNr=@trailer WHERE contractId=@id"</updatechild> 
    <removechild table="VehicleContract" read="id">"DELETE from @table WHERE contractId=@id"</removechild> 
</queries> 

Ve yöntemi:

public string selectParent, selectChildren, addChildren, updateChildren, removeChildren; 
public string[] addParams, updateParams, removeParams; 
XmlTextReader reader = new XmlTextReader(base.Path); 
reader.WhitespaceHandling = WhitespaceHandling.None; 
reader.Read(); 
reader.Read(); 
reader.Read(); 
selectParent = reader.ReadElementContentAsString(); 
reader.Read(); 
selectChildren = reader.ReadElementContentAsString(); 
addParams = reader.GetAttribute("read").Split(','); 
addChildren = reader.ReadElementContentAsString(); 
updateParams = reader.GetAttribute("read").Split(','); 
updateChildren = reader.ReadElementContentAsString(); 
removeParams = reader.GetAttribute("read").Split(','); 
removeChildren = reader.ReadElementContentAsString(); 

bu hat üzerinde hata alıyorum: selectParent = reader.ReadElementContentAsString sorunu ne? reader.Read() eklemeye devam ettim çünkü aynı hatayı ancak farklı düğüm tiplerinde tutmaya devam ettim.

Bildiğim kadarıyla, tablo özniteliği sorgudan @table'ın yerini almalı ... ama bir şey doğru değil. Herhangi bir fikir?

Answer 1

Ben Sen `base.Path` beklenen XML dosyasına atıfta olup olmadığını kontrol etmek isteyebilirsiniz xml linq

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Text; 
using System.Xml; 
using System.Xml.Linq; 

namespace ConsoleApplication1 
{ 
    class Program 
    { 
     static void Main(string[] args) 
     { 
      string xml = 
       "<?xml version=\"1.0\" encoding=\"utf-8\" ?>" + 
       "<queries>" + 
        "<selectparent table=\"Associates\">\"SELECT * FROM @table\"</selectparent>" + 
        "<selectchild table=\"VehicleContract\">\"SELECT * FROM @table\"</selectchild>" + 
        "<addchild table=\"VehicleContract\" read=\"contractId, regNr, assoc_id, percentage, vehicleType, trailerNr\">\"INSERT into @table (contractId, regNr, assoc_id, percentage, vehicleType, trailerNr) VALUES (@id, @reg, @assort, @perc, @type, @trailer)\"</addchild>" + 
        "<updatechild table=\"VehicleContract\" read=\"contractId, regNr, assoc_id, percentage, vehicleType, trailerNr\">\"UPDATE @table SET regNr=@reg, assoc_id=@assort, percentage=@perc, vehicleType=@type, trailerNr=@trailer WHERE contractId=@id\"</updatechild>" + 
        "<removechild table=\"VehicleContract\" read=\"id\">\"DELETE from @table WHERE contractId=@id\"</removechild>" + 
       "</queries>"; 

      XDocument doc = XDocument.Parse(xml); 

      var results = doc.Elements("queries").Select(x => new 
      { 
       selectParent = x.Elements("selectparent").Select(y => new 
       { 
        table = (string)y.Attribute("table"), 
        value = y.Value 
       }).FirstOrDefault(), 
       selectChild = x.Elements("selectchild").Select(y => new 
       { 
        table = (string)y.Attribute("table"), 
        value = y.Value 
       }).FirstOrDefault(), 
       addChild = x.Elements("addchild").Select(y => new 
       { 
        table = (string)y.Attribute("table"), 
        read = (string)y.Attribute("read"), 
        value = y.Value 
       }).FirstOrDefault(), 
       updateChild = x.Elements("updatechild").Select(y => new 
       { 
        table = (string)y.Attribute("table"), 
        read = (string)y.Attribute("read"), 
        value = y.Value 
       }).FirstOrDefault(), 
       removeChild = x.Elements("removechild").Select(y => new 
       { 
        table = (string)y.Attribute("table"), 
        read = (string)y.Attribute("read"), 
        value = y.Value 
       }).FirstOrDefault(), 
      }).FirstOrDefault(); 
     } 
    } 
}