?
Solved

how to remove duplicate elements in XML while loading.

Posted on 2011-09-20
6
Medium Priority
?
1,723 Views
Last Modified: 2013-11-11
below is the code working on loading the xml element in the dropdownlist but my questions is, how can i load only unique data
some of the topicname has a duplicate.
<asp:DropDownList ID="DropDownList1" runat="server">
        </asp:DropDownList>

New XML:

<content type="application/xml">
    <CatalogItems xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns="sitename.xsd">
        <CatalogSource Acronym="ABC" OrganizationName="ABC Corporation" />
        <CatalogItem Id="3212" CatalogUrl="urlname">
            <ContentItem xmlns:content="sitename.xsd" TargetUrl="url">
                <content:SelectionSpec ClassList="" ElementList="" />
                <content:Language Value="eng" Scheme="ISO 639-2" />
                <content:Source Acronym="ABC" OrganizationName="ABC Corporation1" />
                <content:Topics Scheme="ABC">
                    <content:Topic TopicId="1" TopicName="Marketing1" />
                    <content:Topic TopicId="11" TopicName="Coverage1" />
                </content:Topics>
            </ContentItem>
        </CatalogItem>
    <CatalogItem Id="3212" CatalogUrl="urlname">
        <ContentItem xmlns:content="sitename.xsd" TargetUrl="url">
            <content:SelectionSpec ClassList="" ElementList="" />
            <content:Language Value="eng" Scheme="ISO 639-2" />
            <content:Source Acronym="ABC" OrganizationName="ABC Corporation2" />
            <content:Topics Scheme="ABC">
                <content:Topic TopicId="2" TopicName="Marketing2" />
                <content:Topic TopicId="22" TopicName="Marketing2" />
            </content:Topics>
        </ContentItem>
    </CatalogItem>
    <CatalogItem Id="3212" CatalogUrl="urlname">
        <ContentItem xmlns:content="sitename.xsd" TargetUrl="url">
            <content:SelectionSpec ClassList="" ElementList="" />
            <content:Language Value="eng" Scheme="ISO 639-2" />
            <content:Source Acronym="ABC" OrganizationName="ABC Corporation3" />
            <content:Topics Scheme="ABC">
                <content:Topic TopicId="3" TopicName="Marketing3" />
                <content:Topic TopicId="33" TopicName="Marketing3" />
            </content:Topics>
        </ContentItem>
    </CatalogItem>
    </CatalogItems>
</content> 

  protected void Page_Load(object sender, EventArgs e)
        {
            LoadXML();
        }

        public void LoadXML()
        {
               
            XmlDocument doc = new XmlDocument();
            doc.Load("PATH TO XML HERE");
            XmlNodeList elemList = doc.GetElementsByTagName("content:Topic");

                for (int i = 0; i < elemList.Count; i++)
                {
                    string x = elemList[i].Attributes["TopicName"].Value.ToString();

                    DropDownList1.Items.Add(new ListItem(x, x));
                }  


        }

Open in new window

0
Comment
Question by:nisarkhan
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
  • 2
  • 2
6 Comments
 
LVL 10

Accepted Solution

by:
JPJ78 earned 1400 total points
ID: 36567009
Add the DropDownList1.Items.FindByValue() before adding the new listitem.
Adding this prevents the addintion multiple items with the same value.
public void LoadXML()
        {
               
            XmlDocument doc = new XmlDocument();
            doc.Load("PATH TO XML HERE");
            XmlNodeList elemList = doc.GetElementsByTagName("content:Topic");

                for (int i = 0; i < elemList.Count; i++)
                {
                    string x = elemList[i].Attributes["TopicName"].Value.ToString();

                    if(!DropDownList1.Items.FindByValue(x))
                       DropDownList1.Items.Add(new ListItem(x, x));
                }  


        }

Open in new window

0
 
LVL 7

Author Comment

by:nisarkhan
ID: 36567025
Error      1      Operator '!' cannot be applied to operand of type 'System.Web.UI.WebControls.ListItem'       
0
 
LVL 7

Author Comment

by:nisarkhan
ID: 36567046

if(DropDownList1.Items.FindByValue(x))
                       DropDownList1.Items.Add(new ListItem(x, x));

Error      1      Cannot implicitly convert type 'System.Web.UI.WebControls.ListItem' to 'bool'
0
Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

 
LVL 10

Expert Comment

by:JPJ78
ID: 36571841
if(DropDownList1.Items.FindByValue(x) == null)
0
 
LVL 63

Assisted Solution

by:Fernando Soto
Fernando Soto earned 600 total points
ID: 36595446
Hi nisarkhan;

Seeming you posted this question into the Linq thread as well here is a Linq solution to the question. Change the LoadXML function as follows:

public void LoadXML( )
{
    XElement xdoc = XElement.Load( "C:/Working Directory/Catalog.xml" );
    XNamespace content = "sitename.xsd";

    var topics = ( from t in xdoc.Descendants( content + "Topic" )
                   select t.Attribute( "TopicName" ).Value ).Distinct( );

    foreach (string topic in topics)
    {
        DropDownList1.Items.Add(topic);                
    }
}

Open in new window


Fernando
0
 
LVL 63

Expert Comment

by:Fernando Soto
ID: 36595450

Replace the path in this statement :

XElement xdoc = XElement.Load( "C:/Working Directory/Catalog.xml" );

To the path where you have your XML file.
0

Featured Post

Windows Server 2016: All you need to know

Learn about Hyper-V features that increase functionality and usability of Microsoft Windows Server 2016. Also, throughout this eBook, you’ll find some basic PowerShell examples that will help you leverage the scripts in your environments!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Introduction This article shows how to use the open source plupload control to upload multiple images. The images are resized on the client side before uploading and the upload is done in chunks. Background I had to provide a way for user…
More often than not, we developers are confronted with a need: a need to make some kind of magic happen via code. Whether it is for a client, for the boss, or for our own personal projects, the need must be satisfied. Most of the time, the Framework…
Michael from AdRem Software explains how to view the most utilized and worst performing nodes in your network, by accessing the Top Charts view in NetCrunch network monitor (https://www.adremsoft.com/). Top Charts is a view in which you can set seve…
How to fix incompatible JVM issue while installing Eclipse While installing Eclipse in windows, got one error like above and unable to proceed with the installation. This video describes how to successfully install Eclipse. How to solve incompa…
Suggested Courses

752 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question