Question

I am trying to add elements from a textbox on a button click to a grid view. Every time the user hits the button, I want it to add on another element to the end.

Currently, the [0] element gets overridden each time the button is clicked and displays only the most recently added string value. I am also trying to add the arraylist to a session variable.

How can this be done better?

public string InputArray;
ArrayList myArrayList = new ArrayList();

private void BindData()
{
    SuffixGridView.DataSource = myArrayList;
    SuffixGridView.DataBind();
}

protected void Page_Load(object sender, EventArgs e)
{
    InputArray = suffixTextBox.Text;
    Session["postFix"] = (ArrayList)myArrayList;
}

protected void SuffixButton_Click(object sender, EventArgs e)
{
    myArrayList.Add(InputArray);
    BindData();
    suffixTextBox.Text = String.Empty;
}

Answer 1

Page_Load overrides Session["postFix"] with the current myArrayList every time — even on SuffixButton_Click (or rather on Page.IsPostBack). Instead, load myArrayList from Session on postback.