Access Form1 Control from Form2 Control

I am Doing Notpad at the moment.

I placed a richTextBox in Form1 and textbox and a button in Form2.

When I press Find in form1, It goes to the Form2.

I need help from you from here.

when I enter a string in textBoxand press button1 in form2 , I want the function of searching string in richTextBox in Form1.

if it found a string , highlights the line.

please help me.

Try this:

/* in Form1 */

private void btnFind_Click(object sender, EventArgs e)

{

richTextBox1.Text = richTextBox1.Text.Trim();

if (richTextBox1.Text.Length > 0)

{

richTextBox1.SelectAll();

richTextBox1.SelectionBackColor = richTextBox1.BackColor;

new Form2(richTextBox1).Show();

}

else

{

MessageBox.Show("Text box is empty!");

richTextBox1.Focus();

}

}

/* Form2 */

public partial class Form2 : Form

{

private RichTextBox rtb; //add this private field

public Form2(RichTextBox rtb) // change constructor to accept a parameter

{

InitializeComponent();

this.rtb = rtb;

}

private void button1_Click(object sender, EventArgs e)

{

textBox1.Text = textBox1.Text.Trim();

if (textBox1.Text.Length > 0)

{

int index = rtb.Find(textBox1.Text);

if (index == -1)

{

MessageBox.Show("Text not found");

}

else

{

rtb.SelectionBackColor = Color.Yellow;

}

this.Close();

}

else

{

MessageBox.Show("Please enter a string to search for");

textBox1.Focus();

}

}

// any other code

}

1 Reply

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

Vulpes13y ago
Try this:

/* in Form1 */

private void btnFind_Click(object sender, EventArgs e)
{
richTextBox1.Text = richTextBox1.Text.Trim();
if (richTextBox1.Text.Length > 0)
{
richTextBox1.SelectAll();
richTextBox1.SelectionBackColor = richTextBox1.BackColor;
new Form2(richTextBox1).Show();
}
else
{
MessageBox.Show("Text box is empty!");
richTextBox1.Focus();
}
}

/* Form2 */

public partial class Form2 : Form
{
private RichTextBox rtb; //add this private field

public Form2(RichTextBox rtb) // change constructor to accept a parameter
{
InitializeComponent();
this.rtb = rtb;
}

private void button1_Click(object sender, EventArgs e)
{
textBox1.Text = textBox1.Text.Trim();

if (textBox1.Text.Length > 0)
{
int index = rtb.Find(textBox1.Text);
if (index == -1)
{
MessageBox.Show("Text not found");
}
else
{
rtb.SelectionBackColor = Color.Yellow;
}
this.Close();
}
else
{
MessageBox.Show("Please enter a string to search for");
textBox1.Focus();
}
}

// any other code
}