Question

I’m creating an RTF Editor and I need help with the search functions. I have already created the find and replace code but I cant figure out how to code the find next and replace all code. Any help will be much appreciated. The following is the code that I have already. ( I am using Visual studio 2010 c# )

    private void buttonFind_Click(object sender, EventArgs e)
    {

        RichTextBox frm1TB = ((Form1)this.Owner).rTB;

        int foundAt;
        foundAt = frm1TB.Text.IndexOf(txtSearch.Text);
        if (foundAt == -1)
        {
            MessageBox.Show("Not Found");
        }
        else
        {

            frm1TB.SelectionStart = foundAt;
            frm1TB.SelectionLength = txtSearch.TextLength;
            frm1TB.Focus();
            btnFindnext.Enabled = true;
            btnReplaceall.Enabled = true;
            btnReplace.Enabled = true;

        }

    }

    private void buttonfindNext_Click(object sender, EventArgs e)
    {

    }

    private void buttonreplace_Click(object sender, EventArgs e)
    {
        RichTextBox frm1TB = ((Form1)this.Owner).rTB;
        btnFind_Click(sender,e);

        frm1TB.SelectedText = txtReplace.Text;         


        }

    private void buttonreplaceAll_Click(object sender, EventArgs e)
    {

    }

Answer 1

I think you can just to this:

frm1TB.Rtf = frm1TB.Rtf.Replace("replace what", "with this");