Dynamic events in code

Question

I have a radio buttons and one text box on a panel made dynamically . Now, I want to disable the text box when the second radio button is checked, means they are both connected. how can I make the event for it. I want to have the event working. Thanks a lot in advanced. this is my code which is not working:

Panel pnl = new Panel();
pnl.Name = "pnl_";
pnl.Size = new Size(630, 80);

RadioButton rd = new RadioButton();
rd.Name = "rd_" + dr[i]["Value_Name"].ToString();
rd.Text = dr[i]["Value_Name"].ToString();
rd.Location = new Point(i,i*2);
pnl.Controls.Add(rd);

TextBox txt = new TextBox();
txt.Name = "txt_" + Field_Name+"_"+dr[i]["Value_Name"].ToString();
txt.Size = new Size(171, 20);
txt.Text = Field_Name + "_" + dr[i]["Value_Name"].ToString(); 
txt.Location = new Point(20, 30);
pnl.Controls.Add(txt);

//////  ???? ////////
rd.CheckedChanged += new EventHandler(eventTxt(txt));

void eventTxt(object sender,EventArgs e,TextBox txt)
        { 
           RadioButton rd = (RadioButton)sender;
           txt.Enabled = rd.Checked;

        }

Servy · Accepted Answer · 2014-03-19 17:39:58Z

1

Use a lambda to close over the relevant variable(s):

rd.CheckedChanged += (s, args) => txt.Enabled = rd.Checked;

If you had more than a one line implementation, you could call out to a method accepting whatever parameters you've closed over, instead of including it all inline.

answered Mar 19, 2014 at 17:39

Servy

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Patrick Hofman · Accepted Answer · 2014-03-19 17:39:00Z

0

I would suggest to set the Tag of the radio button and get walk down the dependencies.

rd.Tag = txt;

In the event handler use this:

TextBox txt = (sender as Control).Tag as TextBox;

txt.Enabled = ...

answered Mar 19, 2014 at 17:39

Patrick Hofman

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Patrick Hofman · Accepted Answer · 2014-03-19 23:31:53Z

0

you can use code given

rd.CheckedChanged += (s,argx) => txt.Enabled = rd.Checked;

edited Mar 19, 2014 at 23:31

Patrick Hofman

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answered Mar 19, 2014 at 17:47

Dhruv Pandya

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Cullub · Accepted Answer · 2014-03-20 02:06:49Z

Here's how you could create an event for it:

//if you are using Microsoft Visual Studio, the following
//line of code will go in a separate file called 'Form1.Design.cs'
//instead of just 'Form1.cs'
myTextBox.CheckChangedEventHandeler += new EventHandeler(checkBox1_CheckChanged);  //set an event handeler  

public void checkBox1_CheckChanged(object sender, EventArgs e)     //what you want to happen every time the check is changed
{
    if(checkBox1.checked == true)    //replace 'checkBox1' with your check-box's name
    {           

        myTextBox.enabled = false;    //replace 'myTextbox' with your text box's name;
                                      //change your text box's enabled property to false
    }
}

Hope it helps!

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