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XML & .net

Posted on 2016-12-01
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Last Modified: 2016-12-01
I have super simple xml and below .net c# codes and just try to read

stepID=1 and controlID=state and it should return two states under <Data></Data> but it does not happen. not sure why and need experts helping.

Thanks

  public string GetOptionList(string stepID, string controlID)
        {
            string tmpStr = string.Empty;
            XmlDocument myXml = new XmlDocument();
            myXml.Load(Server.MapPath("~") + "\\testStructure.xml");
            XmlNodeList oXmlNodeList = myXml.SelectNodes("Structure/Step[@ID=" + stepID + "]/Section/Control[ID=" + controlID + "]/Data");
            foreach (XmlNode x in oXmlNodeList)
            {
                string option = x.SelectSingleNode("Option").InnerText;
                tmpStr = tmpStr + "<option>" + option + "</option>";
            }
            return tmpStr;
        }

<?xml version="1.0" encoding="utf-8" ?>
<Structure>
    <Step ID="1">
      <Section>
        <Control>
          <Label>First Name</Label>
          <ID>firstName</ID>
          <Type>Text</Type>
          <Cols>4</Cols>
          <Data>
            <Option>None</Option>
          </Data>
          <Required>No</Required>          
         </Control>
        <Control>
          <Label>Last Name</Label>
          <ID>lastName</ID>
          <Type>Text</Type>
          <Cols>4</Cols>
          <Data>
            <Option>None</Option>
          </Data><Required>No</Required>
        </Control>
        <Control>
          <Label>State</Label>
          <ID>state</ID>
          <Type>Select</Type>
          <Cols>4</Cols>
          <Data>
            <Option>CA</Option>
            <Option>TX</Option>
          </Data><Required>No</Required>
        </Control>
        <Control>
          <Label>Do You Like Me?</Label>
          <ID>LikeIt</ID>
          <Type>Select</Type>
          <Cols>4</Cols>
          <Data>
            <Option>Yes</Option>
            <Option>No</Option>
          </Data>
          <Required>No</Required>
        </Control>        
      </Section>
    </Step>
    <Step ID="2">
      <Section>
        <Control>
          <Label>First Name</Label>
          <ID>firstName</ID>
          <Type>Text</Type>
          <Cols>4</Cols>
          <Data>
            <Option>None</Option>
          </Data><Required>No</Required>
        </Control>                  
      </Section>
    </Step>
    <Step ID="3">
      <Section>
        <Control>
          <Label>First Name</Label>
          <ID>firstName</ID>
          <Type>Text</Type>
          <Cols>4</Cols>
          <Data>
            <Option>None</Option>
          </Data><Required>No</Required>
        </Control>
        <Control>
          <Label>Last Name</Label>
          <ID>lastName</ID>
          <Type>Text</Type>
          <Cols>4</Cols>
          <Data>
            <Option>None</Option>
          </Data><Required>No</Required>
        </Control>
        <Control>
          <Label>State</Label>
          <ID>state</ID>
          <Type>Select</Type>
          <Cols>4</Cols>
          <Data>
            <Option>CA</Option>
            <Option>TX</Option>
          </Data><Required>No</Required>
        </Control>
      </Section>
  </Step>
</Structure>

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Question by:ITsolutionWizard
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5 Comments
 
LVL 52

Expert Comment

by:Ryan Chong
ID: 41909721
try this:
public string GetOptionList(string stepID, string controlID)
        {
            string tmpStr = string.Empty;
            XmlDocument myXml = new XmlDocument();
            myXml.Load(Server.MapPath("~") + "\\testStructure.xml");
            XmlNodeList oXmlNodeList = myXml.SelectNodes("Structure/Step[@ID=" + stepID + "]/Section/Control[ID='" + controlID + "']/Data/Option");
            foreach (XmlNode x in oXmlNodeList)
            {
                string option = x.InnerText;
                tmpStr = tmpStr + "<option>" + option + "</option>";
            }
            return tmpStr;
        }

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0
 
LVL 28

Accepted Solution

by:
Pawan Kumar earned 500 total points
ID: 41909726
Hi,

Pls Try....

private void Form1_Load(object sender, EventArgs e)
        {
            string tmpStr = string.Empty;
            XmlDocument myXml = new XmlDocument();
            
            myXml.Load("E:\\pawan2.xml");
            XmlNodeList oXmlNodeList = myXml.SelectNodes("Structure/Step[@ID=" + "1" + "]/Section/Control[Label='State']");
            foreach (XmlNode x in oXmlNodeList)
            {
                XmlNodeList y = x.SelectNodes("Data/Option");
                foreach (XmlNode z in y)
                {
                    string option = z.InnerText;
                    tmpStr = tmpStr + "<option>" + option + "</option>";
                }                                    
            }
            Console.WriteLine(tmpStr);
        }

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Output


EE
Hope it helps !!
1
 
LVL 23

Expert Comment

by:Siva Prasanna Kumar
ID: 41909731
I think it's XPATH is incorrect it should be something like this:

/Structure/Step[@ID='1']/Section/Control[ID='firstName']/Data/Option

Also single quotes for "stepID" are missing I corrected it below.

Change the following line to

   XmlNodeList oXmlNodeList = myXml.SelectNodes("/Structure/Step[@ID='"+ stepID + "']/Section/Control[ID='" + controlID + "']/Data/Option");

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0
 
LVL 1

Author Closing Comment

by:ITsolutionWizard
ID: 41909759
Best...
0
 
LVL 52

Expert Comment

by:Ryan Chong
ID: 41909764
well, same thought posted earlier was not being accepted. well done.
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