create buttons dynamically to call method and pass in parameter

Question

I have a dictionary with a key value pair and need to loop through the pairs and create a button for each one and wire up the button to call a method DisplayDocument(string Id) and pass in the Key as a parameter.

Here's what I have so far.

        // test data
        var documents= new Dictionary<string,string>();
        documents.Add("69110","Diploma");
        documents.Add("76404", "Licensure");


        foreach (KeyValuePair<string, string> item in documents)
        {

            MyStringBuilder=MyStringBuilder.Append(item.Value + "   " + item.Key + "<br />"); 

        }
        printFaxDocuments.InnerHtml = MyStringBuilder.ToString();

What i want to do is print out the document Key and Value and then a button that the use can click to view the document. I have the method built to view the document and it requires the Key value to be passed in. How can I do this?

I'm not sure how to intersperse the button in the text data. I need to write out the key and value add the button add a "<br/>" and then do the same thing again for the next item in the dictionary.

jdavies · Accepted Answer · 2011-10-20 19:37:23Z

4

Below I have created the Button controls in the OnInit method and assigned each of them the same Click event handler.

The Key is stored in the Buttons CommandArgument property which is retrieved in the event handler and passed to the DisplayDocument method.

protected override void OnInit(EventArgs e)
{
    // test data
    var documents = new Dictionary<string, string>();
    documents.Add("69110", "Diploma");
    documents.Add("76404", "Licensure");

    foreach (KeyValuePair<string, string> item in documents)
    {
        Button button = new Button();
        button.Text = string.Format("Button: {0}", item.Key);
        button.CommandArgument = item.Key;
        button.Click += ButtonClicked;

        ButtonContainer.Controls.Add(button);
    }

    base.OnInit(e);
}

protected void ButtonClicked(object sender, EventArgs e)
{
    Button button = (Button) sender;
    string id = button.CommandArgument;

    DisplayDocument(id);
}

private void DisplayDocument(string id)
{
    //Do something
}

Edit

You are probably better off using CSS to set the layout for the Buttons.

Try adding the following CSS class to the head of your page (or stylesheet file)

<style type="text/css">
    .stacked-button
    {
        display:block;
    }
</style>

And then add the following to the button creation code:

button.CssClass = "stacked-button";

You can then add to the CSS class as required to modify the layout (margins etc.)

Hope this helps.

edited Oct 20, 2011 at 19:37

answered Oct 20, 2011 at 19:14

jdavies

12.9k3 gold badges35 silver badges33 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

Ronald McDonald Over a year ago

thanks that really helps. how can I add a line break so the buttons are vertically stacked instead of horizontal?

Chris · Accepted Answer · 2018-06-28 18:00:11Z

0

This post demonstrates a slightly more powerful way of passing parameters, should you want to pass anything more complex.

Adding the click event handler:

button1.Click += delegate(object sender, EventArgs e) { 
    button_Click(sender, e, "String or other types eg, enum..", SomeCustomEnum.SomeSelection); 
};

Then just add the parameters to the click handler method:

void button_Click(object sender, EventArgs e, string messageButCanBeIntEtc, SomeCustomEnum type)  
{  
    // do things
}

answered Jun 28, 2018 at 18:00

Chris

6,5226 gold badges50 silver badges61 bronze badges

Collectives™ on Stack Overflow

create buttons dynamically to call method and pass in parameter

2 Answers 2

1 Comment

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

1 Comment

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related