Object reference not set to an instance of an object.

Question

Form1 frm1=(Form1)this.Owner; string dl = frm1.DrvLtr; This is in the onload of form2. I'm trying to get access to the string DrvLtr on form1. Could someone please help. Thanks you

axb924 · Answer

Here is a solution: Form1 access; public Form2(Form1 temp) { access = temp } This is the constructor of Form2 and it recieves refrence to Form1, this is what you have to do in Form1 public Form1() { Form2 temp = new Form2(this); } * you can also declare Form2 temp, globally if you would like, so that you can access Form2's attributes. That is the constructor for Form1. To access your label's properites you can expose it using the value function or you can set the label's accessor to public. Refer to this previous post about the value function. http://216.26.160.137/Forums/AspNetForums20/ShowPost.aspx?PostID=8604. Arindam

sailorfoley · Answer

More than likely its the line Form1 frm1 = (Form1)this.Owner your form probably has no parent.You will need to set this so.

Johan.Peeters · Answer

I don't know wether it is the same problem but I have had a same kind of problem and there seems to be a bug in Visual Studio. The actual problem is not in the OnLoad but in the InitializeComponent(). What you could try to do is this. Place the InitializeComponent() in a try block and replace the InitializeComponent() in the catch block (catch the base exception). This could work because the exception is never thrown twice after each other. Hope this will work. J.

Object reference not set to an instance of an object.

Answers (3)