Question

I am using two forms, where one is a rich text editor with menus and a rich text box and the second form is for search and replace and contains four button and two text boxes. I have managed to do the find button but I am having problems with Find Next. I am using C# Windows Forms.

Here is the code I am using for Find:

private void button1_Click(object sender, EventArgs e)
    {
        RichTextBox frm1TB = ((Form1)this.Owner).txtDisplay;

        int foundAt = frm1TB.Text.IndexOf(searchText.Text);

        if (foundAt == -1)
        {
            MessageBox.Show("Not Found");
        }
        else
        {
            frm1TB.SelectionStart = foundAt;
            frm1TB.SelectionLength = searchText.TextLength;
            frm1TB.Focus();

        }
    }

Answer 1

Find next would be something like the following:

if (frm1TB.Text.Length >= frm1TB.Text.SelectionStart + frm1TB.Text.SelectionLength)
{
    int foundAt = frm1TB.Text.IndexOf(
        searchText.Text,
        frm1TB.Text.SelectionStart + frm1TB.Text.SelectionLength);
}