read xml text box in c#

Question

1.00/5 (4 votes)

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In my form I have 2 text boxes, combobox and save my data in form with XML.
My code:

C#

 private void Bok_Click(object sender, EventArgs e)
        {
            engcmd.Engname = TBname.Text;
            engcmd.EngDescription = TBDescription.Text;
            engcmd.EngCommand = CBCommmand.Items[CBCommmand.SelectedIndex].Text;

           
            XmlElement enginecommand = doc.CreateElement("enginecommand");
            doc.AppendChild(enginecommand);

            XmlElement nameengc = doc.CreateElement("nameengc");
            XmlElement desengc = doc.CreateElement("desengc");
            XmlElement commandengc = doc.CreateElement("commandengc");
            XmlAttribute stageid = doc.CreateAttribute("stageid");

            XmlText nameengctext = doc.CreateTextNode(TBname.Text);
            XmlText desengctext = doc.CreateTextNode(TBDescription.Text);
            XmlText commandengctext = doc.CreateTextNode(CBCommmand.Items[CBCommmand.SelectedIndex].Text);

            enginecommand.Attributes.Append(stageid);
            enginecommand.AppendChild(nameengc);
            enginecommand.AppendChild(desengc);
            enginecommand.AppendChild(commandengc);

            nameengc.AppendChild(nameengctext);
            desengc.AppendChild(desengctext);
            commandengc.AppendChild(commandengctext);

            doc.Save(Application.StartupPath + "/TestProcedureEdit.xml");

            this.Close();
        }
private void Fillcontrol()
        {
            XmlNode node = doc.DocumentElement;

            TBname.Text = node.ChildNodes[0].InnerText;
            TBDescription.Text = node.ChildNodes[1].InnerText;
            CBCommmand.Items[CBCommmand.SelectedIndex].Text = node.ChildNodes[3].InnerText;
        }

But there is an error.

~~please help me.~~

Posted 16-Nov-11 0:04am

msh66

Updated 16-Nov-11 0:06am

André Kraak

v2

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Comments

RaisKazi 16-Nov-11 6:06am

What is Error?

msh66 16-Nov-11 11:15am

error:
Object reference not set to an instance of an object.

Sergey Alexandrovich Kryukov 16-Nov-11 12:33pm

What are you trying to achieve?
--SA

fjdiewornncalwe 16-Nov-11 13:16pm

If you have an Object reference error, then it should be quite simple to place a breakpoint at the top of the method throwing the error and then use F10 to step through each line until you encounter the object that is not initialized. Take care of this and you move on to your next error.

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Denno.Secqtinstien · Accepted Answer · 2011-11-21T19:18:00

you are mising out object from any one of these lines of code, debug using putting breakpiont and share us about the code..

C#

enginecommand.Attributes.Append(stageid);
enginecommand.AppendChild(nameengc);
enginecommand.AppendChild(desengc);
enginecommand.AppendChild(commandengc);
nameengc.AppendChild(nameengctext);
desengc.AppendChild(desengctext);
commandengc.AppendChild(commandengctext);

thanks