Get text from dynamicly created RichTextBox in onChange event

Question

How can I get the text from a dynamicly created RichTextBox and a dynamicly created rtb_TextChanged Event?

e.g:

    private void button1_Click(object sender, EventArgs e)
    {
        RichTextBox rtb = new RichTextBox();
        rtb.Name = "rtb" + i;
        rtb.Dock = DockStyle.Fill;

        rtb.TextChanged += rtb_TextChanged;

        Controls.Add(rtb);

    }

    void rtb_TextChanged(object sender, EventArgs e)
    {
        //string s = rtb.Text;    //How can I get the rtb.Text?
    }

Duplicate of: http://stackoverflow.com/questions/957441/richtextbox-wpf-does-not-have-string-property-text — Fka, Apr 20 '15 at 19:22
Or of: http://stackoverflow.com/questions/1536739/get-a-windows-forms-control-by-name-in-c-sharp — Der Kommissar, Apr 20 '15 at 19:24

score 3 · Accepted Answer · answered Apr 20 '15 at 19:24

3

You need to use the sender argument of your event handler:

void rtb_TextChanged(object sender, EventArgs e)
{
    RichTextBox rtb = (RichTextBox)sender;
    string s = rtb.Text;
    //... etc
}

answered Apr 20 '15 at 19:24

RoadieRich

6,330
3
35
52

score 2 · Answer 2 · answered Apr 20 '15 at 19:28

2

You just need to use the event parameter : sender

private void richTextBox1_TextChanged(object sender, EventArgs e)
{  
       RichTextBox rtb = (RichTextBox)sender;
       var str = rtb .Text;
}

answered Apr 20 '15 at 19:28

MRebai

5,344
3
33
52

score 0 · Answer 3 · answered Apr 20 '15 at 19:27

0

First rtb is not the name that you called the textbox. Since the textbox sent the message you could cast the sender to a textbox and look at its text property.

answered Apr 20 '15 at 19:27

jfin3204

699
6
18

Get text from dynamicly created RichTextBox in onChange event

3 Answers3