error as object reference not set to an instance of an object

[maddy1]

HELLO

when ever im trying to execute this, im getting an error as object reference not set to an instance of an object

private void button2_Click(o bject sender, EventArgs e)
{

try
{
button1.Enabled = false;
XmlDocument doc = new XmlDocument();
doc.Load("C:\\D ocuments and Settings\\srakk li\\Desktop\\sa mple.xml");
XmlNodeList xnl = doc.SelectNodes ("//info");
foreach (XmlNode node in xnl)
{

if (node.Attribute s["salary"].Value == null)
{
Console.WriteLi ne("no col");
}
else
{
node.Attributes["salary"].Value = (Int32.Parse(no de.Attributes["salary"].Value) + 100.ToString()) ;
}
}

doc.Save("C:\\D ocuments and Settings\\srakk li\\Desktop\\sa mple.xml");


}
catch (SqlException ee)
{
Console.WriteLi ne(ee);
Console.ReadLin e();
}

[kenobewan]

Which object and line is the error referring to?

[maddy1]

Which object and line is the error referring to?

Hello

i get that error in the following line:
node.Attributes["salary"].Value = (Int32.Parse(no de.Attributes["salary"].Value) + 100.ToString()) ;

[RedSon]

Hello

i get that error in the following line:
node.Attributes["salary"].Value = (Int32.Parse(no de.Attributes["salary"].Value) + 100.ToString()) ;

What does 100.ToString() do? is 100 a primitive data type? How can you do a dot operation on a primitive?

Is this some kind of goofy VB.net thing?

[enreil]

I think your parentheses are goofy, and as a result it looks like you are parsing something that is already an int32, trying to add a string "100" to it, and then placing it back into an int32. The following should accomplish the same purpose more efficiently:

node.Attributes["salary"].Value += 100;

Hello

i get that error in the following line:
node.Attributes["salary"].Value = (Int32.Parse(no de.Attributes["salary"].Value) + 100.ToString()) ;