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daItemDialog causes System.NullReferenceException
11 Jan 2013 18:47 #1156
by kasssa
Replied by kasssa on topic Re: daItemDialog causes System.NullReferenceException
I'm just getting a Windows Visual Studio popup error message (below) - I don't see a call stack anywhere. Is there a way I can force one?
NullRefException_bw.jpg
I also have a try/catch block around my code, but it doesn't seem to catch the exception. Below is the code I'm executing...
private void button10_Click (object sender, EventArgs e)
{
// BROWSE
try
{
Console.WriteLine ("mach name: {0}; server ProgID: {1}",
comboBox1.Text, comboBox2.Text);
Debug.Assert (comboBox1.Text != null);
Debug.Assert (comboBox2.Text != null);
daItemDialog1.ServerDescriptor.MachineName = LOCALHOST; // comboBox1.Text;
daItemDialog1.ServerDescriptor.ServerClass = comboBox2.Text;
if (daItemDialog1.ShowDialog () == DialogResult.OK)
{
//Debug.Assert (daItemDialog1.NodeElement != null);
//richTextBox1.Text += daItemDialog1.NodeElement.ItemId + Environment.NewLine;
}
}
catch (Exception ex)
{
MessageBox.Show (ex.Message);
}
}
I'm a seasoned programmer, but fairly new to C#; please don't hesitate to make suggestions that would add to my knowledge!
Thank you!
NullRefException_bw.jpg
I also have a try/catch block around my code, but it doesn't seem to catch the exception. Below is the code I'm executing...
private void button10_Click (object sender, EventArgs e)
{
// BROWSE
try
{
Console.WriteLine ("mach name: {0}; server ProgID: {1}",
comboBox1.Text, comboBox2.Text);
Debug.Assert (comboBox1.Text != null);
Debug.Assert (comboBox2.Text != null);
daItemDialog1.ServerDescriptor.MachineName = LOCALHOST; // comboBox1.Text;
daItemDialog1.ServerDescriptor.ServerClass = comboBox2.Text;
if (daItemDialog1.ShowDialog () == DialogResult.OK)
{
//Debug.Assert (daItemDialog1.NodeElement != null);
//richTextBox1.Text += daItemDialog1.NodeElement.ItemId + Environment.NewLine;
}
}
catch (Exception ex)
{
MessageBox.Show (ex.Message);
}
}
I'm a seasoned programmer, but fairly new to C#; please don't hesitate to make suggestions that would add to my knowledge!
Thank you!
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