hi how can fetch the form2 dgv value into form1 textbox???? please reply

backiyalakshmi K

14y4.4kVisual Basic .NET

Satya nayak please help me how can fetch the form2 dgv value into form1 textbox???? please reply

7 Replies

Know the answer? Post it — somebody with the same question will find it here.

Vulpes14y ago
Accepted answer
As I said in the previous thread, I can't fix it unless I know what's null. The image is too small to read in any case.

If you don't know how to use the debugger to find this out, then change the code as follows and tell me what you see:

private void textBox1_Click(object sender, System.EventArgs e)
{
Form2 f2 = Application.OpenForms["Form2"] as Form2;
if (f2 == null)
{
MessageBox.Show("f2 is null");
return;
}
DataGridView dgv = f2.Controls["dataGridView1"] as DataGridView;
if (dgv == null)
{
MessageBox.Show("dgv is null");
return;
}
textBox1.Text = dgv.Rows[0].Cells[0].Value.ToString();
textBox2.Text = dgv.Rows[0].Cells[1].Value.ToString();
}
backiyalakshmi K14y ago
got the result thank u sir...
Vulpes14y ago
That can only mean one of two things:

1. Form2 is not open when you're running this code; or

2. Form2 is not the correct name for the form (check its Name property in Properties Box).
backiyalakshmi K14y ago
f2 is null...
backiyalakshmi K14y ago
Sir...it is showing f2 is null in messageBox
backiyalakshmi K14y ago
What and all u said i changed all the thinks sir but also am getting the error...please help me hw can i rectify it???
Vulpes14y ago
You asked this question a few days ago and I gave you this answer which should work if the assumptions are correct but you said it was nevertheless giving a 'null reference' exception:
----------------------------------------------------------------------------------------
Suppose that:

1. The DGV on Form2 has been placed directly on that form and is called dataGridView1.

2. memcode and memname are displayed in row 0, columns 0 and 1 of dataGridView1.

Then the code to do that from Form1 would be:

private void textBox1_Click(object sender, System.EventArgs e)
{
Form2 f2 = (Form2)Application.OpenForms["Form2"];
DataGridView dgv = (DataGridView)f2.Controls["dataGridView1"];
textBox1.Text = dgv.Rows[0].Cells[0].Value.ToString();
textBox2.Text = dgv.Rows[0].Cells[1].Value.ToString();
}
----------------------------------------------------------------------------------------

A slightly easier way of doing things is to change the Modifiers property of dataGridView1 (in the Properties Box) from private to internal. It will then be visible to all other forms in the application without needing to go through the Controls collection.

If you do that first, the revised code will be:

private void textBox1_Click(object sender, System.EventArgs e)
{
Form2 f2 = (Form2)Application.OpenForms["Form2"];
DataGridView dgv = f2.dataGridView1;
textBox1.Text = dgv.Rows[0].Cells[0].Value.ToString();
textBox2.Text = dgv.Rows[0].Cells[1].Value.ToString();
}