C＃刪除XML父節點保留爲空節點

Question

我要去上刪除父節點來實現，但是當它再次運行，發生異常時，似乎是解析錯誤

下面是我原來的XML

<?xml version="1.0" encoding="UTF-8"?> 
<stock> 
    <brand name="Samsung"> 
     <product name="Galaxy S2"/> 
     <product name="Galaxy S3"/> 
     <product name="Galaxy S4"/> 
    </brand>  
    <brand name="iPhone"> 
     <product name="iPhone 4"/> 
     <product name="iPhone 5"/> 
    </brand> 
</stock> 

我的目標是要做到這一點：

<?xml version="1.0" encoding="UTF-8"?> 
<stock> 
    <brand name="Samsung"> 
     <product name="Galaxy S2"/> 
     <product name="Galaxy S3"/> 
     <product name="Galaxy S4"/> 
    </brand> 
</stock> 

下面是我使用的removeAll刪除（）的結果;

<?xml version="1.0" encoding="UTF-8"?> 
<stock> 
    <brand name="Samsung"> 
     <product name="Galaxy S2"/> 
     <product name="Galaxy S3"/> 
     <product name="Galaxy S4"/> 
    </brand> 
    <brand/> 
</stock> 

下面是我的代碼

public bool deleteBrand(string brand) 
{ 
    bool result = false; 

    try 
    { 
     List<string> existingBrandName = getBrand(); 
     if (existingBrandName.Contains(brand)) 
     { 
      XDocument productList = load(); 

      var query = from positions in productList.Descendants("brand") 
         where (string)positions.Attribute("name").Value == brand 
         select positions; 

      XElement selectedBrand = query.ElementAt(0); 
      selectedBrand.RemoveAll(); 


      var emptyElements = from element in productList.Descendants("stock") 
           where element.IsEmpty 
           select element; 

      while (emptyElements.Any()) 
       emptyElements.Remove(); 

      productList.Save(path); 
      result = true; 
     } 
    } 
    catch (Exception ex) 
    { 
     Console.WriteLine(ex.ToString()); 
    } 


    return result; 
} 

Answer 1

你需要做的事情emptyElements與brand還有：

public bool deleteBrand(string brand) 
{ 
    bool result = false; 
    try 
    { 
     List<string> existingBrandName = getBrand(); 
     if (existingBrandName.Contains(brand)) 
     { 
      XDocument productList = load(); 
      var query = from positions in productList.Descendants("brand") 
         where (string)positions.Attribute("name").Value == brand 
         select positions; 
      XElement selectedBrand = query.ElementAt(0); 
      selectedBrand.RemoveAll(); 
      var toCheck = productList.Descendants("stock") 
            .Concat(productList.Descendants("brand")); 
      var emptyElements = from element in toCheck 
           where element.IsEmpty 
           select element; 
      while (emptyElements.Any()) 
       emptyElements.Remove(); 
      productList.Save(path); 
      result = true; 
     } 
    } 
    catch (Exception ex) 
    { 
     Console.WriteLine(ex.ToString()); 
    } 
    return result; 
}